JP2001026376A - Yarn knotting detector for creel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To determine whether yarn knotting is finished or not, reliably with a simple structure, when feed bobbins in creels are changed and the yarn and retained in the creels and the yarn leader of the new feed bobbin are knotted together before take-up motion is started. SOLUTION: A creel for accommodating a multitude of feed bobbins 12 includes a nip member 38 for holding the yarn leader of a newly placed feed bobbin 12, a tension disk for holding the yarn end of a feed bobbin 12 that had been in the creel in position downstream of the nip member 38, and a knotter for automatically knotting the two lines of yarn retained between the two holders. Tensioning means 34 apply prescribed tension to yarn 16 thus knotted between the two holders, by forcing a tensioning lever 18 on it. A detecting element 24 and a proximity sensor 32 detect the state of tension the tensioning means 34 apply to the yarn 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a creel for feeding a large number of warp yarns onto a beam by placing a yarn feeding bobbin on a plurality of rows of frames so that the yarns can be simultaneously pulled out. The present invention relates to a technique for detecting the success or failure of a yarn knot between a new yarn supplying bobbin and a yarn left on a creel of a previous yarn supplying bobbin, which is performed after a yarn bobbin is replaced.

[0002]

2. Description of the Related Art Hitherto, a creel in which a large number of yarn supplying bobbins are arranged on a frame has been used in order to pull out hundreds to hundreds of hundreds of yarns and wind them into a sheet in a beam. In this creel, the yarn of the yarn supplying bobbin is lost due to withdrawal of the yarn from the yarn supplying bobbin, or the yarn of the used yarn supplying bobbin is cut off in a state where it is left on the creel for reasons such as a type change, and thereafter, It is necessary to replace the used yarn supplying bobbin with a new yarn supplying bobbin.

[0003] For example, in order to reduce the standstill time due to such yarn feeding bobbin replacement, a plurality of holders capable of mounting the same number of yarn feeding bobbins are provided on the front and back of a vertically extending frame, respectively. A semi-magazine creel of a type in which a new bobbin is simultaneously opposed to a predetermined position by rotating the frame through a support shaft by 180 ° is used. The simultaneous pulling out of yarn from the yarn supply bobbin on the use side (back side) currently used is completed, and the holder on the standby side (front side) not currently used is
A new yarn supplying bobbin to be used next is pre-arranged. At the time of yarn supply change, the yarn of the old yarn supply bobbin is cut at a position near the old yarn supply bobbin, and the frame is turned 180 ° so that the new yarn supply bobbin placed on the front side faces the remaining yarn end. The head yarn of the new yarn supplying bobbin and the remaining yarn end left on the creel are manually tied, and then the winding device is operated to wind the yarn onto the yarn beam. In tying, there are various tying devices that automatically and sequentially tie using a knotter or the like in addition to tying manually. These tying devices are already known.

[0004]

However, in the case of using the apparatus for automatically tying the yarn, it is difficult to completely tie the yarn because the success or failure of the yarn knot depends on the holding state of the yarn. Defective knotting occurs. Moreover, even though they seem to be tied at first glance, if the knot is incomplete,
Thereafter, the knot may come off when the yarn is pulled in during operation. More specifically, the beginning yarn end of the new yarn supplying bobbin remains close to the new bobbin, while the remaining yarn end on the creel loosens and its meandering contraction, and then the yarn end hangs down. I will. In particular, in the case of a twisted yarn or the like, the yarn comes into contact with an adjacent yarn or a yarn passing through a lower stage and is entangled with each other. Even without entanglement, the take-up beam may be pulled out of some intermediate guides (eyelets) and tension applying mechanisms (disk tensers) provided along the yarn path downstream of the take-up beam. For this reason, these repairs require a great deal of labor and time, and in order to pass a thread through a tension applying device or an intermediate guide located at a high position, a stepladder or the like is moved to each position, and an operator is required to perform the repair. I had to get on and off every time to do the repair work, which was troublesome.

[0005] Further, since a thread breakage detector is generally attached to the outlet of the creel, it can be considered to operate it. However, in the operation of the winding beam performed after the yarn knotting, since the yarn is driven at a low speed, the tension of the yarn is lower than usual and a malfunction is likely to occur. As long as the end does not pass through the tension applying device, the yarn breakage is not detected, and there is no use in preventing a complicated repair work for a poorly knotted yarn.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and after tying the head yarn of a newly mounted yarn supplying bobbin with the remaining yarn end of the previous yarn supplying bobbin, An object of the present invention is to provide a creel yarn knot detecting device that reliably detects whether or not yarn knotting has been completely performed with a simple structure when a yarn is simultaneously pulled out and winding is started.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a yarn tying device for tying the head yarn of a newly mounted yarn supplying bobbin to the remaining yarn end of a preceding yarn supplying bobbin, and the new yarn supplying device. A first holding means for holding the head thread of the thread bobbin and the remaining thread end, respectively;
And a second retainer, after the yarn knot, a tension applying means for applying a predetermined tension by bringing a tension applying member into contact with the yarn tied in a state held by the two retainers; Detecting means for detecting a state of applying tension to the yarn by the tension applying means. Preferably, the tension applying means may apply tension by applying the weight of the tension applying member to the yarn. More preferably, on the creel, the tension applying means and the detecting means may be provided for each of the yarn supplying bobbins.

Preferably, the tension applying means is slidably supported by the creel and a tension applying member having an engaging portion engageable with the yarn tied. A rod that is driven forward and backward in the longitudinal direction thereof, and the tension applying member is configured to be able to engage with the rod and to be relatively movable, and that the tension applying member is driven by the driving unit. The thread is displaced in the direction in which the thread is engaged with the thread, the acting force on the rod is reduced by the engagement between the engaging portion and the thread, and the thread is driven toward a predetermined tension and driven. You may comprise so that a relative motion may be produced | generated with a rod. More preferably, the detection means detects the tension application state by detecting a relative movement or a position of the tension application member due to mechanical movement, and a display device for displaying a detection result of the tension application state. Is more preferably provided near the yarn supplying bobbin. It is more preferable that the above-described yarn knot detecting device is operated before the simultaneous pull-out of the yarns after the operation of the yarn knotting device.

[0009]

According to the creel knot detecting device of the present invention, the tension applying member is moved toward the yarn held by the two retainers and is brought into contact with the yarn. At this time, if the knot is perfect, the knotted yarn withstands the urging force from the tension applying member, and the tension applying member stays at that position while applying tension to the yarn. However, when the yarn knot is poor or the knot of the yarn is incomplete, the knot is loosened by the urging force from the tension applying member, and the yarn to be tensioned does not exist and the tension is not applied. It further moves from a predetermined position without causing relative movement with the driving means. That is, by detecting the relative movement or the like of the tension applying member by the detecting means in response to the application of the tension, it is possible to confirm the state of applying the tension to the yarn, that is, the success or failure of the yarn knot.

Further, if the weight of the tension applying member is made to act upon the application of the tension, the applied tension can be appropriately set by changing the weight of the member. Further, as described above, if the tension applying member is configured to cause relative movement with the driven rod, the tension applied to the yarn tied yarn held between the retainers may exceed the set tension. There is no danger of applying excessive tension. Further, if the yarn knot detection result from the detection means is displayed, the restoration work can be performed efficiently. Also, after the above knot,
By activating the yarn knot detecting device at least before the yarn is simultaneously pulled out, a yarn knot defect is easily found,
Moreover, since the yarn end is located near the retainer, the yarn can be easily tied without spending a lot of labor and time for repairing, that is, finding the wound end and tying the yarn as in the past. Defects can be repaired.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a first embodiment of the present invention. FIGS. 3 and 4 show the creel 13 and a winding device for simultaneously pulling out the yarn from the creel 13 and winding the yarn on a winding beam 48.
On the creel 13, a plurality of frames 17 on which the yarn supplying bobbins 12 are placed are arranged in a plurality of rows in the longitudinal direction. The frame 17 is provided rotatably 180 ° via a shaft extending in the vertical direction,
In addition, holders 19 on which the yarn supplying bobbins 12 can be placed are set up on both front and back sides of each frame 14 constituting the frame 17 at substantially equal intervals. As described above, a so-called semi-magazine creel having a configuration in which the yarn supplying bobbin can be placed on both the front and back sides is configured.

The yarn from each yarn supplying bobbin 12 is
The guide beam (eyelet), the disc tensioner 40 for applying tension, and the like are collected in a sheet form, and the guide beam 44, 45, 46 of the warper, and the winding beam 4 is collected.
8 In addition, a bogie that can self-run along the longitudinal direction of the creel 13 has a knotter 42 as a yarn tying device that ties the yarn supplying bobbin 12 to the remaining yarn on the creel side.
Are arranged corresponding to the respective lead series bobbins.

FIG. 5 shows the periphery of the yarn supplying bobbin in the creel 13 and shows the position of the yarn knot detecting device 10 which is a main part of the present invention. A nip member 38 is provided at the end of the holder 19 provided on the frame 17. The nip member 38 is formed so as to protrude from the end of the bobbin when the yarn supplying bobbin is mounted. It can be held. The nip member 38 is formed of, for example, two plate-like members, and sandwiches the yarn between them. The contact pressure, that is, the holding force is used to pull out the yarn during the operation of the winding device performed later. Is set so as to be easily displaced as the tension increases due to the pressure.

At a position facing the yarn supplying bobbin 12, there is arranged a disk tensor 40 as a tension applying device for adjusting the drawing of the yarn so that the tension of the yarn downstream therefrom becomes a predetermined value. The disk tensor 40 holds a yarn connected to a take-up beam downstream of the disk tensor 40. That is,
The first holder for holding the head yarn of the new yarn supplying bobbin is the nip member 38, and the second holder for holding the yarn left on the creel corresponds to the disk tensor 40. As shown, the knot detecting device 10 of the present invention is disposed between the first and second retainers, and a knot 42 as a knot tying means can enter from the side.

The yarn knot detecting device 10 waits at a predetermined upper position so as not to hinder the yarn knot. Then, each retainer is held so as to leave a necessary length for the yarn knot from the tip of the yarn, and the knot of the yarn held by the advancement of the knotter 42 and the action thereof is performed. Although the details of the operation of the knotter will not be described in detail, the yarns from the respective retainers are crossed and held, and the yarns are knotted by a known knotting device such as a mechanical knotter or an air splicer. Thereafter, the yarn holding by the first and second retainers described above is continued.

FIGS. 1 and 2 show a yarn knot detecting device 10 as viewed from the front of a yarn supplying bobbin 12. FIG. The yarn knot detecting device 10 includes a tension applying lever 18 as a tension applying member, a rod 34 and a drive actuator 15 as driving means for displacing the tension applying lever 18, and a proximity sensor 32 for detecting the tension applying lever 18 as a detecting means. . Creel 1
A nip member 38 serving as a tension applying member is provided on the frame 14 which is disposed on the
And a thin rod-shaped tension applying lever 18 positioned so as to intersect with the yarn 16 held by the disk tensioner 40. A wide mounting portion 20 is formed at the base end of the tension applying lever 18, and a cylindrical bearing portion 22 extending in a direction perpendicular to the wide mounting portion 20 is integrally formed at the base end. Further, the bearing portion 22 is integrally provided with a detecting piece 24 extending in the radial direction in a direction opposite to the tension applying lever 18, and an engaging piece 26 located at a position close to the detecting piece 24 and extending in the shaft diameter and the axial direction. Is formed.

The engagement piece 26 is provided at a position deviated counterclockwise by a predetermined angle with respect to the detection piece 24 about the axis of the bearing portion 22 as shown in FIG. It is set appropriately in accordance with a yarn knot detecting operation described later. The tip of the engagement piece 26 is formed so as to be separated from the bearing portion 22 by a predetermined distance and to extend in parallel with the axial direction. The tension applying lever 18 described above is attached to the bearing portion 22 by the shaft 2.
8 and the shaft 28 is erected at a predetermined position of the frame 14 so as to be rotatably supported.

The frame 14 is provided with a proximity sensor 32 on a bent piece 30 extending above the axis 28 and parallel to the axis. Is set in advance so as to be a gap necessary for detecting the detection piece 24.
A rod 34 extending in the vertical direction is provided near the side of the frame 14. As shown in FIG. 2, the rod 34 is connected to a driving actuator 15 such as an air cylinder as a driving unit, and the rod 34 is held movably in the vertical direction along the frame 14. The engagement piece 26 of the tension applying lever 18 is attached to the rod 34.
A rising piece 36 extending in the horizontal direction and forming a projection capable of hooking the engaging piece 26 is provided, and the engaging piece 26 is securely engaged with the rod 34 at the top and bottom. In this case, the tension applying lever can be rotated.

Next, a series of operations from the replacement of the yarn supplying bobbin to the operation of the yarn knot detecting device 10 will be described. First, when the existing yarn supplying bobbin 12 with a reduced number of yarns is switched to a new yarn supplying bobbin 12, the disk tensor 40
The yarn 16 of the old yarn supplying bobbin 12 is once cut on the upstream side. At this time, the yarn 16 wound around the old yarn supplying bobbin 12
Is held by the disk tensor 40 in a state in which a thread having a length necessary for subsequent knots is hung forward. The frame 1 holding the old yarn supplying bobbin 12
7 is rotated by 180 ° and replaced with a new yarn supplying bobbin 12. At this time, the head yarn of the new yarn supplying bobbin 12 is held by the nip member 38, and the yarn of the length required for the subsequent yarn knot is suspended from the front. On the other hand, in the yarn knot detecting device 10, the rod 34 is lowered, the rising piece 36 of the rod 34 is at a position shown by a two-dot chain line in FIG. 1A, and the hook piece 26 is pushed down to apply tension. The lever 18 is located at a standby position in FIG. The standby position of A is a position higher than the yarn 16 of the yarn supplying bobbin 12 and is a position where the yarn knot by the knotter 42 is not hindered.

The old yarn end held by the disk tensor 40 and the yarn end held by the nip member 38 are automatically tied by a notter 42. As a result, the knot of the yarn exists at a position between the nip member 38 and the disk tensor 40, and the yarns knotted are held by the nip member 38 and the disk tensor 40, respectively.

It is to be noted that, other than the above, a method of knotting the yarn supplying bobbin with the yarn end left on the creel can be considered. In the above example, the yarns hanging on the nip member 38 and the disk tensor 40 are tied by the knotter 42. The knotter 42 directly draws out the head yarn from the yarn supplying bobbin 12, and
It is good also as a system which ties a thread held with a thread.
In this case, the knotted yarn is changed to a state in which the knot of the yarn is present at a position between the nip member 38 and the disk tensor 40 by the knotter 42 or a separately configured member. The plied yarn is held by the nip member 38 which is the first holder. In this way, the newly installed head yarn of the yarn supplying bobbin and the remaining yarn end of the previous yarn supplying bobbin are tied by the yarn tying device, and And a nip member 38 as a first retainer and a disk tensor 4 as a second retainer for respectively holding the remaining yarn end of the front yarn supplying bobbin.
0 can be held respectively. Thereafter, it is confirmed by the yarn knot detecting device 10 whether or not the yarn is tied securely.

When checking the yarn knot of the yarn, the yarn knot detecting device 10 receives a signal such as a yarn knot completion signal from the yarn knotting device or a push button operation via a controller (not shown) via a controller (not shown). Each device is operated to start a series of knot detection operations for applying tension to the yarn. The rod 34 is lowered by the drive actuator 15 in advance, the rod 34 is made to stand by at a position shown by a two-dot chain line in the figure, and the tension applying lever 18 is moved to A in the figure.
At the position. Then, the rod 34 is raised by the drive of the drive actuator 15, and the tension applying lever 18 is rotated clockwise by its own weight around the shaft 28, and the tension is given to the thread 16 held between the nib member 38 and the disk tensor 40. It descends toward it and comes into contact. At this time, the force generated on the yarn 16 by the weight of the tension applying lever 18 is weaker than the holding force of the nip member 38 and the disc tensor 40 and is set in advance to a force suitable for detecting a yarn knot defect. If the knot 16a of the thread by the knotter 42 is perfect, the thread 16 withstands the weight of the tension applying lever 18, and the tension applying lever 18 is locked by the thread 16 so that the engagement between the engagement piece 26 and the rising piece 36 is established. The joint is released and stays at position B in the figure.

However, when the yarn cannot be tied or is incomplete, the yarn 16 is untied by the weight of the tension applying lever 18 and the tension is maintained while the engaging piece 26 and the rising piece 36 are engaged. The application lever 18 drops to the position C in the figure. As described above, by driving the rod 34, the tension applying lever 38, which is a tension applying member, is brought into contact with the yarn 16 tied between the two retainers to apply a predetermined tension. In other words, by driving the driving actuator 15 as the driving means, the tension applying lever 18 as the tension applying member is displaced in the direction in which the yarn is engaged with the thread, and is held by the tension applying lever 18 and the two retainers. It is configured such that a relative movement is generated between the rod 34 and the tension applying member depending on the tension applying state while applying a predetermined tension by engagement with the yarn tied between the rods.

When the tension applying lever 18 is rotated to the position C, the detection piece 24 on the opposite side of the tension applying lever 18 is sensed close to the proximity sensor 32 provided on the frame 14 to detect a yarn knot defect. A signal is output and a display to that effect is made, and in response to this, the winding device prohibits its operation. Then, the untied knot is re-tied manually or by the knotter 42, thereby preventing the occurrence of a trouble in repairing the poorly knotted yarn. In this way, the proximity sensor serving as the detecting means can detect the tension applying state by detecting the relative movement of the tension applying member constituting the tension applying means.

In this operation, for example, as shown in FIG. 2, the yarn knot detecting device 10 provided for each yarn supplying bobbin 12 can simultaneously detect the yarn supplying bobbins arranged in the vertical direction. . In FIG. 2, the yarn knot detecting device 1
Most of the zeros have the tensioning lever 18 parked in the actuated position B, indicating that the thread knot was complete. However, when the yarn knot is incomplete as in the case of the yarn feeding bobbin 12a, the tension applying lever 18a of the yarn knot detecting device 10 falls to the operating position of C indicating that the yarn knot is incomplete. ing. Note that the detection by the yarn knot detecting device 10 is desirably performed immediately after the yarn knotting process is completed by the knotter 42 for each column of the yarn supplying bobbin 12. By knowing the location where the yarn knot is defective when the knotter 42 moves to the next row, it is possible to devise the knotting operation of the knotter and perform the knotting process only at that point again.

The yarn knot detecting device 10 of this embodiment, that is, tension applying means for applying a predetermined tension by driving a tension applying member to the yarn knotted between the two cages, and tension applying means And a detecting means for detecting the state of tension applied to the yarn by means of the above-mentioned method. Is detected, the tension application state, that is, the success or failure of the yarn knot can be easily and reliably determined. Further, even with an incomplete knot, if an appropriate tension is applied, the knot is released or broken, so that it can be reliably detected. As a result, the operation is started by overlooking the yarn knotting failure as in the conventional case, the yarn end reaches the downstream, and a huge amount of labor is required to re-knot the yarn end of the next yarn supplying bobbin 12. Work loss such as necessity can be prevented beforehand.

Since the tension applied to the yarn 16 is applied by its own weight of the tension applying lever 18, the tension can be easily set by adjusting the weight of the tension applying lever 18. In addition, since the plurality of tension applying levers 18 are driven by one rod 34, the number of drive actuators can be reduced, and the structure for applying tension can be further simplified. In addition, the yarn end that was poorly knotted
Since it is held by the nip member 33 and the disk tensor 40, the operator does not have to search for the yarn end and can easily repair the yarn. In addition, since the knot is easily determined, automatic knot tying by a knotter can be employed. Further, as described above, the tension applying lever 18 serving as the tension applying member is displaced in the direction in which the yarn is engaged with the thread by the driving of the drive actuator 15 serving as the driving means, and the tension holding lever 18 and the two holding devices are held. By applying a predetermined tension by engagement with the yarn tied in the above, a relative movement is generated between the rod 34 and the tension applying member depending on the tension applied state, so that the configuration is simplified. The applied tension does not exceed the preset tension, and thread breakage or the like caused by applying an excessive tension does not occur. Thus, the new and old yarn supplying bobbins 12 can be efficiently switched. As described above, after the yarn knot is detected, the drive actuator 15 is driven again to return the tension applying lever 18 to the original position of A, so that the operation of the winding device, that is, the simultaneous pull-out of the yarn may be prevented.

Next, a second embodiment of the present invention will be described with reference to FIG.
It will be described based on. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The yarn knot detecting device 50 of this embodiment is an example in which a tension applying member 61 and a detecting unit are arranged on a rod 34 extending in a vertical direction.

The vertically driven rod 34 is provided with an arm 52 extending horizontally in correspondence with the yarn supplying bobbin. The arm 52 has an insertion portion 68 which is a hole for inserting and supporting the tension applying member 61, and a base end portion on which a photoelectric sensor for outputting a signal by moving the tension applying member 61 is disposed. 54 and 56 are provided at positions facing the insertion portion 68, respectively.
These are formed integrally with the rod 34. Note that a light emitter 58 and a light receiver 60, each of which is formed by a photoelectric sensor serving as a detection unit, are provided at the base ends 54 and 56 so as to face each other, and are arranged so as to form an optical axis.

The tension applying member 61 includes a light shielding member 62, a locking portion 66 which opens downward in a C shape, and a support portion 64 connecting the two. The locking portion 66 and the support portion 64 are integrally formed, and the light shielding member 62 and the support portion 64 are configured to be detachable by a coupling method such as a screw, and can be inserted into the insertion portion 68 of the arm portion. I have.
For this reason, after the support portion 64 is inserted into the insertion portion 68 of the arm portion 52, the end portion is attached to the light shielding member 62, and the cylindrical light shielding member 6 is provided between the light projector 58 and the light receiver 60.
2, the thread 16 pulled out from the yarn supplying bobbin 12 is disposed below the vicinity of the middle of the engaging portion 66 so as to intersect the engaging portion 66. Note that the inner diameter of the insertion portion 68 is formed larger than the outer diameter of the support portion 64, and the tension applying member is configured to be movable in the vertical direction by engagement. A plurality of light shielding members 62 having different weights are prepared, and the applied tension can be freely set by combining these different ones according to the yarn type.

Next, the operation of the yarn knot detecting device 50 will be described. First, at the time of operation of the notter 42, the rod 34 is driven upward, and the locking portion 66 is set to be at an upper standby position where the operation of the notter 42 is not hindered. In this drive, the bottom surface of the light shielding member 62 is in contact with the arm portion 52, and the rod 34 and the tension applying member 61 move upward integrally without relative movement. Thereafter, the yarns held by the two retainers (not shown) are tied by operating the knotter 42.

When the knot of the yarn 16 is confirmed after the operation of the notter 42, the rod 34 is driven downward so that the locking portion 66 exceeds the assumed abutting position of the yarn, and the tension is applied. It is driven and stopped to a predetermined position determined in consideration of the movable range of the member 61, that is, the movable length of the support portion 64. At this time, if the knot of the yarn by the knotter 42 is complete, the rod 16 comes into contact with the locking portion 66 as the rod 34 descends, and the yarn 16 bears the weight of the tension applying member 61 and the tension applying member 6
1 is stationary. The tension applying member 61 is apparently the rod 3
4 relatively upward from the insertion portion 68 of the
And the light receiver 60, and blocks light emitted from the projector 58. Thus, the light receiver 60 can detect that the yarn 16 is securely tied.

However, when the yarn 16 cannot be knotted or the knot is incomplete, the yarn 16 is untied by the weight of the tension applying member 61, and the light shielding member 62 is supported by the arm portion 52. It descends as one.
At this time, the light blocking member 62 does not relatively move with the arm 52 and does not block the optical axis between the light projector 58 and the light receiver 60.
8, the light receiver 60 can detect that the knot is incomplete. Then, based on the yarn knot detection signal, an indication to that effect is displayed, and the winding device having received the display prohibits the operation. According to the yarn knot detecting device 50 of this embodiment, the yarn 1 having the same effect as that of the above-described first embodiment cannot be visually judged to be complete.
The six knots can be reliably determined.

Next, a mode for displaying the knot detection result detected according to the present invention will be described with reference to FIG.
Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. Frame 14 extending in the vertical direction
In the vicinity of each of the yarn supplying bobbins 12, there is provided a display device 70 for displaying a yarn knot detection result of the yarn knot detecting device. The display device 70 is provided with a poorly tied indicator light 72 and a reset button 74 for turning off the poorly tied indicator light 72.

Next, the operation of the display device will be described. First, after the operation of the knotter 42, when the yarn knot detecting device detects a yarn knot defect, the corresponding knot defect indicator lamp 72 near the yarn feeding bobbin 12 is turned on. In this case, the knotting failure signal is stored in a flip-flop (not shown), and the output light turns on the indicator lamp for each yarn supplying bobbin 12. Then, for example, the knot is manually re-tied to complete the operation, the reset button 74 is pressed to reset the flip-flop, the bad knot display hit 72 is erased, the inspection is again performed by the knot detection device, and the drawing of the yarn 16 is resumed Or

According to the yarn knot detecting device of this embodiment,
This is convenient because it is possible to visually grasp which yarn feeding bobbin 12 has a defect. In addition, the repair work can be performed in an efficient order in consideration of the position where the yarn knot defect occurs. In addition, if the operation of turning off the display of the yarn supplying bobbin after the completion of the repair work is performed, it is possible to ensure that the repair leak is not missed. In particular, this display device 70 is provided for each yarn supplying bobbin 12.
Is provided, the worker can perform the repair work in an efficient order in consideration of the position where the yarn knot defect occurs.

The creel knot detecting device of the present invention is not limited to the above-described embodiments, and the shape of the tension applying member may be any as long as it can accurately apply a constant tension to the yarn. Therefore, a method of pressing a flexible tension applying lever such as a leaf spring onto the thread and detecting a part of the leaf spring deformed by the proximity sensor may be used. In this case, the tension is applied in accordance with the amount of bending of the tension applying lever (the amount of driving of the rod), and the detector determines the state of applying tension in a predetermined bending state. Alternatively, a method may be used in which the locking member held by the coil spring is pressed against the thread, and the locking member approaching the deformed coil spring is detected by the proximity sensor.

One or more sets of self-running robots are provided on a self-propelled robot attached to a creel. Each situation may be detected.
One of the tension applying means and the detecting device is provided on the creel corresponding to the yarn supplying bobbin, and the other of the tension applying means and the detecting means is provided on the self-propelled robot attached to the creel. One or a plurality may be provided. Then, the self-propelled robot is moved one after another to detect the yarn knotting state. Further, the detection device may detect the presence or absence of a yarn.

The detecting means of the detecting device may be either an electric means or a mechanical means. As the electric detecting means, a contact type sensor such as a strain sensor or a limit switch, or a non-contact type sensor such as a proximity switch or a photoelectric sensor. Can be considered. The detection means may be attached to any of a rod and a creel frame.

Regardless of the control method after the detection or the display method of the display means, they may be displayed collectively on one display (graphic display) or may be provided on the display provided near the yarn feeding bobbin. May be displayed. The display method of the display means may be any of a mechanical display such as setting a display flag and an electrical display such as turning on a display lamp. Also,
The configuration from the detection of the tension application state by the detection means to the display on the display is not limited. The transmission method of the detection signal may be any of wired, wireless, and optical.

The tension applied to the yarn can be easily changed by adjusting the weight of the tension applying member. And
After the tension applying member engages the yarn and detects a poor knot,
If it is configured to reduce the weight of the tension applying part village applied to the yarn, no tension greater than its own weight will be applied to the yarn,
For example, it is possible to prevent an accident in which excessive tension is applied to the yarn by mistake due to a driving error and the yarn is cut.

Further, the rod driving actuator may be provided for each of the rods, or may be provided for each of the plurality of rods. Further, the driving force of one rod may be transmitted to the tension applying member via a separate movement direction converting member. The direction in which the tension applying member acts on the yarn is
The horizontal direction may be used instead of the vertical direction.

[0043]

According to the creel yarn knot detecting device of the present invention, a tension is applied by applying a predetermined tension by bringing a tension applying member into contact with the yarn knot held by two retainers after the yarn knot. Since the provision of the applying means and the detecting means for detecting the state of applying tension to the yarn by the tension applying means is provided, it is possible to detect the state of applying tension to the tied yarn. If the knot is perfect, the knotted yarn will endure the urging force from the tensioning member and become tensioned, whereas if the knot is poor or the knot is incomplete, the tensioning member As a result, the knot is loosened by the urging force from, or the yarn to be tensioned does not exist, so that tension is not applied.
Therefore, by detecting the tension applied state when the drive to apply the desired tension by contacting the tension applying member,
The success or failure of the yarn knot, which is difficult to determine visually, can be reliably detected with a simple configuration.

Further, if the own weight of the tension applying member is applied when applying the tension, the applied tension can be appropriately set by changing the weight of the member. Further, as described above, if the tension applying member is configured to cause relative movement with the driven rod, the tension applied to the yarn tied yarn held between the retainers may exceed the set tension. There is no danger of applying excessive tension. Further, if the yarn knot detection result from the detection means is displayed, the restoration work can be performed efficiently. In addition, after the above-described yarn knitting, by operating the above-described yarn knot detecting device before the yarn is simultaneously pulled out by the operation of the winding device, a defective yarn knot is easily found, and the yarn end is located near the retainer. As a result, it is possible to easily repair a poorly knotted yarn without spending much labor and time for repairing, that is, finding the wound end of the yarn and repairing the yarn.

[Brief description of the drawings]

FIG. 1 is a front view (a) and a longitudinal sectional view (b) of a creel knot detecting device according to a first embodiment of the present invention.

FIG. 2 is a front view showing an operating state of the creel knot detecting device of this embodiment.

FIG. 3 is a plan view showing a creel provided with the yarn knot detecting device of this embodiment.

FIG. 4 is a front view showing a creel provided with the yarn knot detecting device of the embodiment.

FIG. 5 is a plan view showing the yarn knot detecting device and the yarn supplying bobbin of the embodiment.

FIG. 6 is a perspective view of a creel knot detecting device according to a second embodiment of the present invention.

FIG. 7 is a front view of a yarn knot detecting device for a clear thread according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 10 yarn knot detecting device 12 yarn feeding bobbin 14 frame 16 yarn 18 tension applying lever 22 bearing portion 24 detecting piece

Claims (6)

[Claims] 1. A yarn tying device for tying a head yarn of a newly placed yarn supplying bobbin to a remaining yarn end of a preceding yarn supplying bobbin, and a head yarn of the new yarn supplying bobbin and the remaining yarn. A first and a second retainer for respectively holding the set yarn ends, and after the yarn knot, a tension applying member is brought into contact with the yarn knotted in a state held by the two retainers. A yarn knot detecting device for a creel, comprising: tension applying means for applying a predetermined tension; and detecting means for detecting a state of applying tension to the yarn by the tension applying means. 2. The creel knot detecting device according to claim 1, wherein the tension applying means applies the tension by applying a weight of the tension applying member to the yarn. 3. The device according to claim 1, wherein said tension applying means and said detecting means are provided for each yarn supplying bobbin. 4. A tension applying member having an engaging portion engageable with the yarn tied,
A rod that is slidably supported by the creel and that is driven to advance and retreat in a longitudinal direction thereof via a driving means, wherein the tension applying member is configured to be able to engage with the rod and to be relatively movable. By driving the driving means, the tension applying member is displaced in a direction in which the yarn is engaged with the yarn, and the force acting on the rod is reduced by the engagement between the engaging portion and the yarn. And applying a tension toward a predetermined tension to generate a relative movement between the rod and a driven rod.
Or the yarn knot detecting device for creel according to 3. 5. The creel yarn according to claim 1, wherein the detecting means detects the tension applying state by detecting a relative movement of the tension applying member. Knot detection device. 6. The creel according to claim 1, wherein the yarn knot detecting device is operated at least before the simultaneous pulling out of the yarns after the operation of the yarn knotting device. Yarn knot detection device.