JP2009242028A - Yarn unwinding assisting device for automatic winder and automatic winder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly and accurately change a preparatory plan of an automatic winder caused by a lot change so as to automatically change an initial position and an operation position of a fixed cylinder and a movable cylinder in response to a difference in a vertical dimension of a bobbin. <P>SOLUTION: The fixed cylinder and the movable cylinder are individually elevated and lowered by first and second respective elevating and lowering mechanisms. The respective elevating and lowering mechanism are constituted of a guide member, a slider and a driving structure that elevates and lowers the slider. The driving structure is constituted by using a stepping motor as a driving source. An operation state of the stepping motor is controlled by a control circuit based on bobbin data input in advance to the control circuit and a position signal detected by a position detector of the stepping motor. Thus, the initial position and the operation position of the fixed cylinder and the movable cylinder can be automatically set in response to the difference in the vertical dimension of the bobbin. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a yarn unwinding assist device applied to an automatic winder. The yarn unwinding assisting device unwinds and guides the yarn fed out from the bobbin (spinning bobbin) and smoothes the yarn rewinding process by the winder unit.

  Regarding the yarn unwinding assisting device of the present invention, the unwinding device of Patent Document 1 is known. There, the unraveling device is composed of a fixed cylinder fixed to the lower surface of the guide plate, a movable cylinder that is externally fitted to the fixed cylinder and moved up and down, and an operating cylinder that moves the movable cylinder up and down via a slide block. ing. A movable cylinder and a pair of front and rear support arms are fixed to the slide block, and a sensor for detecting the chase portion of the bobbin and an attitude correction arm are arranged on the opposing surfaces of both arms.

  The chase portion of the bobbin gradually moves downward as the yarn is unwound from the bobbin. The downward movement of the chase portion is detected by a sensor to drive the operation cylinder, and the slide block is lowered by an amount corresponding to the descending amount of the chase portion. As a result, the movable cylinder and the sensor arm move down following the change in the position of the chase portion, and the vertical positional relationship between the chase portion and the movable cylinder is kept constant. Therefore, the balloon that is unwound from the chase portion is excessively expanded by the movable cylinder so that the yarn tension at the time of unwinding is optimized and the generation of fluff is suppressed.

  In the yarn unwinding assist device of the present invention, the fixed cylinder and the movable cylinder are individually moved up and down by a lifting mechanism using a stepping motor as a driving source instead of the operation cylinder described above. It is well known. There, an elevating mechanism is constituted by an elevating guide and a slide block, a rack arranged in parallel with the elevating guide, a stepping motor incorporated in the slide block, a rack fixed to the output shaft of the motor, and the like. A support arm is fixed to the slide block, and a movable cylinder is fixed to the tip of the arm. The support arm is provided with a distance sensor for detecting the chase portion of the bobbin. Further, a rotation speed detection sensor for detecting the bobbin yarn unwinding amount from the rotation speed of the traverse drum is provided. When the rack is driven to rotate, the slide block is moved up and down, so that the movable cylinder can be moved downward following the change in the position of the bobbin chase portion.

JP-A-10-29765 (paragraph numbers 0013 to 0014, FIG. 1) JP-A-8-198520 (paragraph number 0012, FIG. 1)

  In the automatic winder, it is necessary to change and adjust the initial positions of the fixed cylinder and the movable cylinder each time the vertical dimension of the bobbin changes with the lot change. This setup change operation must be performed manually, and the automatic winder is configured by arranging a large number of winder units in a straight line, so it takes a lot of trouble to change the setup of a group of winder units. I cannot avoid hanging. Since it is manually changed and adjusted, there is a disadvantage that the adjustment result tends to vary.

  The object of the present invention is to automatically change the initial position and operating position of the yarn unwinding assisting device according to the difference in the vertical dimension of the bobbin, and therefore, the setup change of the automatic winder accompanying the lot change can be made quickly and accurately. An object of the present invention is to provide a yarn unwinding assisting device for an automatic winder that can be performed.

  The yarn unwinding assist device provided in the winder unit of the present invention includes a fixed cylinder that assists in unwinding the bobbin in a fixed state, and a movable body that assists in unwinding the bobbin while moving following the unwinding of the bobbin. A cylinder. The fixed cylinder is moved up and down by a first lifting mechanism having a driving source, and the movable cylinder is moved up and down by a second lifting mechanism having a driving source.

  The drive source for the first lifting mechanism and the drive source for the second lifting mechanism are stepping motors.

  The yarn unwinding assist device further includes a control circuit that controls the operating states of both the first and second lifting mechanisms. Therefore, based on the bobbin data inputted in advance to the control circuit, the control circuit controls the operating state of both lifting mechanisms so that the initial position and the operating position of the fixed cylinder and the movable cylinder can be automatically set. .

  In the automatic winder according to the present invention, a plurality of winder units provided with a yarn unwinding assisting device including the control circuit are arranged. The automatic winder is provided with a machine base control device for controlling the control circuit. The machine control device can collectively control a plurality of control circuits.

  The yarn unwinding assisting device according to the present invention has a fixed cylinder that assists in unwinding the bobbin in a fixed state, and a movable cylinder that assists in unwinding the bobbin while moving following the unwinding of the bobbin. The fixed cylinder is moved up and down by a first lifting mechanism having a drive source. Further, the movable cylinder is moved up and down by a second lifting mechanism having a drive source. As described above, when the fixed cylinder and the movable cylinder can be moved up and down individually by the first lifting mechanism and the second lifting mechanism, the initial position and the operating position of the fixed cylinder and the movable cylinder can be automatically changed according to the lot change. . Therefore, the setup change of a group of one-in-der units can be performed simultaneously and quickly as compared with the conventional apparatus in which the setup change is performed manually. In addition, since the setup can be changed in a very short time, the operating rate of the automatic winder can be improved, and the fixed cylinder and the movable cylinder can be accurately held at the initial position and the operating position.

  If each of the drive source of the first elevating mechanism and the drive source of the second elevating mechanism is composed of a stepping motor, the fixed cylinder and the movable cylinder can be accurately and without delay by the first elevating mechanism and the second elevating mechanism. Can move up and down. Furthermore, the current positions of the fixed cylinder and the movable cylinder can be specified from the detection signal output from the position detector of the stepping motor.

  According to the yarn unwinding assist device configured to include the control circuit for controlling the operating states of the first and second lifting mechanisms, the control circuit detects the bobbin data inputted in advance and the detection of the position detector of the stepping motor. Based on the signal, the initial position and the operating position of the fixed cylinder and the movable cylinder can be set. Further, the operating state of both the lifting mechanisms can be controlled by the control circuit according to the set contents, and the fixed cylinder and the movable cylinder can be lifted and lowered to the initial position and the operating position.

  The automatic winder according to the present invention is composed of a plurality of winder units, and each winder unit is provided with a yarn unwinding assisting device including the control circuit described above. The automatic winder is also provided with a machine base control device for controlling individual control circuits. Therefore, according to the automatic winder of the present invention, the individual control circuits are collectively controlled by the machine control device to change the initial position and the operating position of the fixed cylinder and the movable cylinder in accordance with the lot change, and a group of one-inder units Can be done automatically at once. Therefore, as compared with the conventional apparatus in which the setup change is manually performed, the setup change of the group of one-inder units can be performed quickly, and the operating rate of the automatic winder can be improved.

(Embodiment) FIGS. 1 to 5 show an embodiment of an automatic one-inder according to the present invention. The automatic one-inder is configured by arranging a group of one-inder units shown in FIG. 2 in a straight line. The one-inder unit has a vertically long machine body 2 arranged facing the conveyance path of the bobbin 1, and a yarn unwinding auxiliary device, a tension device 3, a yarn splicing device 4, a slab catcher 5, etc. on the front surface of the machine body 2 However, they are arranged from the bottom of the fuselage to the top of the fuselage in the order described.

  A traverse drum 6 that traverses the yarn Y in a certain width range, a guide plate 7 that faces the traverse region of the traverse drum 6, and a package P are rotatably supported on the front upper portion of the machine body. A cradle 8 or the like is arranged. In addition to these devices, a splicing pipe 9 and a suction mouth 10 that suck and capture the cut yarn and pass it to the yarn splicing device 4 are provided in the middle of the previous device row so as to be able to turn in the vertical direction. The yarn Y fed out from the bobbin 1 is checked for the presence or absence of a yarn defect while passing through the respective devices 3 to 5, and when a yarn defect is found, the cutter provided in the slab catcher 5 and the yarn splicing device 4 And the defective portion is removed by suction.

  The yarn unwinding assisting device individually moves up and down the fixed cylinder 15 fixed to the first holder 14 above the bobbin 1, the movable cylinder 17 fixed to the second holder 16, and both the cylinders 15 and 17. The first and second lifting mechanisms 18 and 19 are used. The fixed cylinder 15 and the movable cylinder 17 are arranged concentrically so as to be doubled inside and outside. A support arm 21 is fixed to the second holder 16 so as to face the front and rear with the chase portion 20 of the bobbin 1 in between. A sensor 22 for detecting the chase portion 20 and a pair of front and rear posture correcting arms 23 that sandwich and hold the upper portion of the core tube of the bobbin 1 when necessary are disposed on the opposing surface of the support arm 21. As shown in FIG. 4, the first and second elevating mechanisms 18 and 19 are arranged adjacent to each other on the left and right.

  The fixed cylinder 15 is a cylinder whose upper and lower ends are open, and a thread guide 25 is provided at the center of the lower surface opening. The movable cylinder 16 is a cylinder that is slightly larger than the fixed cylinder 15, and an upper end of the cylinder is opened, and a downwardly expanding tapered inlet 26 is formed at the lower end of the cylinder.

  3 and 4, the first elevating mechanism 18 includes a pair of left and right guide shafts (guide members) 30 whose upper ends are fixed to the frame 29, a slider 31 guided so as to be movable up and down by both guide shafts 30, and the slider 31. And a drive structure that moves up and down along the guide shaft 30. The lower end of the guide shaft 30 is fixed to a bracket 32 that protrudes from the middle of the frame 29. The first holder 14 is fixed to the front surface of the slider 31.

  The drive structure includes a stepping motor (drive source) 35 fixed to the upper end of the frame 29, a feed screw shaft 36 that is rotationally driven by the stepping motor 35, and a female screw body 37 that is operated up and down by the feed screw shaft 36. To do. The upper end of the feed screw shaft 36 arranged in parallel with the previous guide shaft 30 is connected to the stepping motor 35 via a coupling, and the lower end of the feed screw shaft 36 is rotatably supported by the previous bracket 32. It is. The female screw body 37 is fixed to the rear surface of the slider 31 described above. When the stepping motor 35 is rotationally driven in either the forward or reverse direction, the feed screw shaft 36 rotates along with the female screw body 37 so that the fixed cylinder 15 can be moved up and down. The female screw body 37 cannot be moved up and down unless the feed screw shaft 36 is rotationally driven by the stepping motor 35, and can thus self-hold the position displaced up and down.

  The second elevating mechanism 19 includes a pair of left and right guide shafts (guide members) 40 whose upper and lower ends are fixed to the frame 29, a slider 41 guided by the both guide shafts 40 so as to be movable up and down, and the slider 41 as the guide shaft 40. And a drive structure that moves up and down along. The second holder 16 is fixed to the front surface of the slider 41.

  The drive structure includes a stepping motor (drive source) 45 fixed to the upper end of the frame 29, a feed screw shaft 46 that is rotationally driven by the stepping motor 45, and a female screw body 47 that is operated up and down by the feed screw shaft 46. To do. The upper end of the feed screw shaft 46 arranged in parallel with the previous guide shaft 40 is connected to the stepping motor 45 via a coupling, and the lower end of the feed screw shaft 46 is rotatably supported by the frame 29. . The female screw body 47 is fixed to the rear surface of the slider 41 described above. When the stepping motor 45 is driven to rotate in either forward or reverse direction, the feed screw shaft 46 rotates along with the female screw body 47 so that the movable cylinder 17 can be moved up and down. The function capable of self-holding the position where the female screw body 47 is moved up and down is the same as that of the female screw body 37 described above.

  The sensor 22 includes an optical sensor including a light projecting unit and a light receiving unit, and detects the yarn layer of the chase unit 20 depending on whether or not the detection light emitted from the light projecting unit is received by the light receiving unit. Further, the height of the chase portion 20 is detected, and the bobbin 1 is a full bobbin in a fully wound state, or a half ball bobbin in which a part of the yarn layer is wound up by an automatic winder, or the remaining amount of the yarn layer is small. Whether it is a bean ball bobbin can be determined.

  As shown in FIG. 5, the pair of front and rear posture correcting arms 23 swings downward with respect to the upper and lower ends of the core tube when the bobbin 1 erected and fixed on the transport tray 49 is sent along the transport path. The bobbin 1 is positioned by holding the pin. With this positioning, the central axis of the bobbin 1 coincides with the cylindrical central axes of the fixed cylinder 15 and the movable cylinder 17. After positioning, the posture correcting arm 23 returns to the position indicated by the solid line in FIG. 1 and stands by. Also, when a yarn defect is found, the upper end of the core tube of the bobbin 1 is sandwiched and held in the same manner as at the time of positioning, and the middle part of the cut yarn Y is sandwiched and held, and the yarn Y is no more than that. Prevent being unraveled. In FIG. 3, reference numeral 50 denotes a control circuit that controls the operating states of both the first and second lifting mechanisms. The control circuit 50 outputs a detection signal of the light receiving unit of the sensor 22. Further, the position signal of the encoder (position detector) of the stepping motor 45 is output to the control circuit 50. The automatic winder is provided with a machine base control device for controlling the control circuit 50 of a group of winder units, and the individual control circuits 50 can be collectively controlled by this machine base control device.

  Next, the operation of the one-inder unit will be described. When the fully wound bobbin 1 is transported to a predetermined position, the transport tray 49 is stopped and held and positioned by the posture correction arm 23. At this time, the fixed cylinder 15 and the movable cylinder 17 are located at an initial position above the bobbin 1 (position shown in FIG. 5). In this state, compressed air is blown from the bottom of the transport tray into the core tube, and the yarn Y held inside the core tube is blown up and inserted into the fixed cylinder 15 and the movable cylinder 17. The yarn Y that has passed through both the cylinders 15 and 17 is captured by the intermediate pipe 9 and delivered to the yarn splicing device 4 where it is spliced.

  Simultaneously with the end of yarn splicing, the fixed cylinder 15 is lowered from the initial position to the operating position of a predetermined height by the first elevating mechanism 18, and simultaneously the movable cylinder 17 is operated from the initial position by the second elevating mechanism 19 to the predetermined height. Move down to the position. The operating position of the fixed cylinder 15 corresponds to the vertical dimension of the bobbin 1, and the lower end opening of the fixed cylinder 15 is a position 10 mm away from the upper end of the core tube of the bobbin 1, as shown in FIG. Similarly, the operating position of the movable cylinder 17 corresponds to the height position of the chase portion 20 of the bobbin 1, and the lower end opening of the movable cylinder 17 faces the upper portion of the chase portion 20.

  In the above state, the winding core of the package P is driven to rotate and the winding of the yarn Y is started. The fixed cylinder 15 and the movable cylinder 17 in a state in which the yarn Y is wound up restricts the expansion of the balloon formed by the yarn unwound from the bobbin 1 and applies an appropriate tension to the yarn Y to be wound up.

  As the winding of the yarn Y progresses, the height of the chase portion 20 gradually decreases. Then, the detection light of the sensor 22 that has been blocked by the large diameter end of the chase unit 20 is received by the light receiving unit, and a light reception signal is output from the light receiving unit to the control circuit 50. Upon receiving the light reception signal, the control circuit 50 issues an operation command signal to the stepping motor 45 of the second elevating mechanism 19 to drive the stepping motor 45 and lower the slider 41 via the female screw body 47. The stepping motor 45 is stopped when the detection light of the sensor 22 is blocked again at the large diameter end of the chase portion 20. As a result, the movable cylinder 17 can be moved down to a new operating position following the change in the position of the chase portion 20. The following descending operation of the movable cylinder 17 is repeated until all the yarn Y wound around the bobbin 1 is unwound and fed.

  Even when the half ball bobbin is transported to the front of the one-inder unit, positioning by the posture correcting arm 23 and yarn joining by the yarn joining device 4 are performed in the same manner as described above, but the position of the chase portion 20 of the half ball bobbin Is lower than the fully wound bobbin 1. Therefore, when the sensor 22 detects that the bobbin to be processed is a half-bobbin, the movable cylinder 17 is moved downward from the initial position to the operating position where the detection light of the sensor 22 is blocked by the large-diameter end of the chase portion 20. Is done. In the case of a bean bobbin, a series of operations are performed in the same manner.

  When bobbins 1 having different vertical dimensions are conveyed and supplied to the winder unit by changing the lot, the initial position of the yarn unwinding assisting device is changed. At the time of position change, after the bobbin data is input to the control circuit 50 in advance, the control circuit 50 can automatically determine the initial positions of the fixed cylinder 15 and the movable cylinder 17 by, for example, turning on the execution button. Furthermore, the stepping motors 35 and 45 are driven based on the drive command signal issued from the control circuit 50, and the fixed cylinder 15 and the movable cylinder 17 are moved up and down to be positioned at the initial position corresponding to the bobbin 1 after the lot change. Can do.

  The control circuit 50 recognizes the origin positions of the first and second elevating mechanisms 18 and 19, and further determines the fixed cylinder 15 and the number of steps detected by the encoders (position detectors) of the stepping motors 35 and 45. The current position of the movable cylinder 17 can be specified. Therefore, when the setup change is started, the control circuit 50 can determine the initial positions and the operating positions of the fixed cylinder 15 and the movable cylinder 17 corresponding to the bobbins 1 having different vertical dimensions from the previously input bobbin data. Further, the stepping motors 35 and 45 can be driven so that the fixed cylinder 15 and the movable cylinder 17 are moved from the current position to the determined initial position. As described above, according to the automatic one-inder of the present invention, since the position of the fixed cylinder 15 and the movable cylinder 17 can be automatically changed, a group of one-inder compared with the conventional apparatus in which the setup is changed manually. Unit setup changes can be made simultaneously and quickly. Moreover, since the setup change can be executed in a very short time, the operating rate of the automatic winder can be improved.

  In the above embodiment, the drive structure is configured by using the feed screw shafts 36 and 46 and the female screw bodies 37 and 47 as transmission elements, but this is not necessary. For example, the drive structure can be configured by using a pair of upper and lower timing pulleys and a timing belt as transmission elements, and the sliders 31 and 41 can be fixed to the portion following the straight line of the timing belt. In addition, a drive structure can be configured using a rack that is guided and supported so as to be slidable up and down and a pinion that drives the rack up and down as transmission elements.

It is a partially broken side view of the yarn unwinding assist device. It is a schematic side view of a one-inder unit. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is a partially broken side view showing the yarn unwinding assisting device in the initial state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bobbin 15 Fixed cylinder 17 Movable cylinder 18 1st raising / lowering mechanism 19 2nd raising / lowering mechanism 50 Control circuit

Claims (4)

The yarn unwinding assist device provided in the winder unit
A fixed cylinder that assists in unwinding the bobbin in a fixed state;
A movable cylinder that assists in the unraveling of the bobbin while following the unraveling of the bobbin;
Have
The fixed cylinder is lifted and lowered by a first lifting mechanism having a drive source,
The automatic winder's yarn unwinding assisting device, wherein the movable cylinder is moved up and down by a second lifting mechanism having a drive source.   The automatic winder yarn unwinding assisting device according to claim 1, wherein the driving source of the first lifting mechanism and the driving source of the second lifting mechanism are stepping motors. The yarn unwinding assist device is further configured to include a control circuit that controls the operating states of the first and second lifting mechanisms.
Based on bobbin data input in advance to the control circuit, the control circuit can control the operating states of the lifting mechanisms and automatically set the initial and operating positions of the fixed cylinder and the movable cylinder. The yarn unwinding assisting device for an automatic winder according to claim 2 characterized by the above-mentioned. An automatic winder in which a plurality of winder units provided with the yarn unwinding assist device according to claim 3 are arranged,
The automatic winder is equipped with a machine control device for controlling the control circuit,
The automatic machine winder is characterized in that the machine control device can control a plurality of the control circuits at once.

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