JPH03167304A - Unraveling device of knitted fabric - Google Patents

Abstract

PURPOSE:To automatically eliminate hitching and to rewind yarn on a bobbin by stopping bobbin rotators when a detecting rod discovers yarn hitching, oscillating a vibrator and imparting impact to meshes of a net. CONSTITUTION:In winding each yarn on plural bobbin rotators 2a-2d and rewinding, when yarns drawn out from knitted fabric are passed through vibrators 11a-11d and threading parts of a detector and yarn guide shafts 4a-4d, guided to the bobbin rotators 2a-2d and occurrence of hitching of the whole yarns is discovered, rotation of the whole bobbin rotators 2a-2d is stopped once. Then, vibrators 11a-11d are oscillated and strong impact caused by fractional tensile strength to sufficiently untie solid knots eliminates hitching at meshes smoothly, readily and surely.

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to an unraveling device for stockinette knits.

[Prior Art J Conventionally, stockinette knitting fabrics use high-quality yarn, so if a knitting loss occurs, it is unraveled, wound back onto the spool, and reused. There are those knitted with one thread, those knitted with two threads, and those knitted with two to several dozen threads.Those knitted with one thread can be knitted without getting caught. However, when knitting with multiple threads, if you do not unravel the threads at the same time in the stitch, for example, only one of the threads may lead or fall behind. If it is unraveled, the mesh is complex and can easily get caught. That is, when a garment knitted with two or more -L threads is knitted with multiple threads, these *v! Because each i thread has a different tension applied to it, when a stockinette knit is unraveled, the thread on which a weaker tension was applied during knitting becomes looser and longer than the thread on which a stronger tension was applied. It can be solved by Patent No. 1i'l'Pl-, which was filed by the same applicant as this application, is a device for unwinding such stockinette knitted fabrics while unwinding them into threads.
No. 81696 is provided, and this device includes at least two thread-winding rotating bodies, a device for rotationally driving the thread-winding rotating bodies, a clutch provided for each of the thread-winding rotating bodies, and a device for unweaving the threads of a knitted article. The device consists of a device that detects an impossible state, and a device that operates the clutch on and off based on the state in which unraveling of the knitted material is possible and the state in which unraveling of the knitted material is not possible. In the device. When winding and unwinding each thread around multiple thread-winding rotors set at the same rotation speed. When a thread that has become caught among multiple threads is detected, the clutch provided for the bobbin winder rotating body for the thread that has become caught is disengaged, and only the rotation of the bobbin winder that has become caught is instantly stopped. The system waits until the thread that has been rewound on another bobbin winding rotating body reaches the stitch where the catch occurred, and the catch is automatically released when all the threads are wrapped in the same stitch. If it is detected that all threads are caught at the same time, all clutches are disengaged, all bobbin winding rotating bodies are temporarily stopped, and at the same time a large instantaneous operation is applied to all clutches. Repeatedly, all the bobbin winding rotating bodies are moved slightly to apply an instantaneous tensile force impact to the stitches, thereby eliminating the catch.
[Problems to be solved by Akira] However. In the stockinette knitting unraveling device according to the invention of Japanese Patent Application No. 1-8-1696, when all the yarns become caught at the same time, all the clutches are temporarily stopped and instantaneous clutch engagement/clutch operation is performed. Although the method of repeatedly moving the bobbin rotating body to apply 1f1 blows to the stitches due to the instantaneous pulling force of the stitches may be able to untie the stitches if the knots are weak, it may be difficult to undo the knots if the stitches are tight.
Since the impact applied to the m-th stitch is weak, the stitches cannot be unraveled, and the amount of inching of the bobbin winding rotating body increases, which exceeds the tension limit of the thread and causes the thread to break before the stitches are unraveled. Moreover, if the clutch is repeatedly engaged and engaged, there is a problem with the lifespan of the clutch, which also has the disadvantage of increasing the number of clutch failures. The present invention has been made in view of the above-mentioned problems of the conventional technology, and its purpose is to prevent threads from being pulled out of a knitted fabric when winding and unwinding each thread around a plurality of thread-wound rotating bodies. The yarn is guided through a vibrator to the bobbin winding rotating body through the detection device and the thread guide of the thread guide shaft, and when it is detected that all threads are caught, the rotation of all the bobbin winding rotating bodies is stopped. , and then vibrate the vibrator to apply a strong shock with a slight catching force that is sufficient to untie the tight knots in the stitches, so that the caught stitches can be easily and reliably released. The purpose of this invention is to provide an unraveling device for stockinette knitted fabrics. [A Thousand Steps to Solve the Problem] In order to achieve the above object, the stockinette knitting unraveling device according to the present invention comprises at least a 2M thread-wound rotating body, a device for rotationally driving the thread-wound rotary body, and a thread-wound rotating body of at least 2M; A clutch provided for each rotating body. A device that detects a state in which unweaving of m yarns is impossible, a vibration #J″a that vibrates the yarn pulled out from the knitted fabric, a drive that vibrates the vibrator! It consists of a device that turns on and off the clutch and drives the vibrator drive device based on the state in which unraveling is possible and the state in which it is impossible. Each thread of the book is wound back to the bobbin rotating body through the vibrator through the detection rod and the guide shaft, and when the thread is unraveled,
When the detection rod is in the lowered position, the detection switch is closed, the clutch is held in the human position, and the bobbin winder is rotated. Among the several threads, the thread that is caught becomes tense, and the tension of the thread is detected. The rod is pulled up and rises to detect the thread being caught, and as the detection rod rises, the detection switch is opened, disengaging the clutch attached to the bobbin winding rotor for the thread that has become caught, and detecting the thread being caught. Immediately stops only the rotation of the bobbin-spool rotating body that caused this. However, since the clutches of the other spool rotating bodies are in the human state, these threads are still unwound and rewound to the spool rotating bodies, and when these threads reach the stitches where they are caught, All the threads run in the same stitch, automatically releasing the catch. Also,
If all the threads are caught at the same time, that is, when all the detection rods are raised and all the detection switches are open, open all the clutches and temporarily close all the bobbin winding rotating bodies. At the same time, the vibrator is stopped and the vibrator drive device is activated to extend and retract the wire in small increments through eccentric movements. This causes the vibrator connected to the wire to vibrate, creating a strong impact force due to the small tension in the stitches. By giving , the problem is resolved. When the catch is released, the tension in the stopped string is loosened, and the detection rod descends due to its own weight, closing the detection switch, stopping the movement of the tidal device, and at the same time, large-scale operation of the clutch is performed to detect the stopped string. Rotate all the pincushion rotating bodies again. [Example J An example will be explained with reference to the drawings. In FIG. 1, at least two bobbin rotating bodies 2a are mounted on the top surface of the bobbin table l.
．． 2b. 2c. 2d is rotatably installed, and a threading hole 3a. 3b. 3c. Guide shafts 4a, 4b with 3d. 4c. 4d to each of the above-mentioned thread-wound rotating bodies 2
Threading holes 5a, 5b. 5c. 5d with sensing rod 6a. 6b, 6c, 6d are installed freely,
The thread-wound rotating bodies 2a to 2d are continuously rotated at the same rotational speed by the motor Ml, and the thread-wound rotating bodies 28 to
2d are individual clutches 7a, 7b. 7c.
7d, and a programmable controller 8 as a device for turning on and off the clutches 78 to 7d.
are provided, and the detection switches 6a to 6d are provided with detection switches 9a. 9b. 9c. 9d
The clutches 78 to 7d can be turned on and off in response to operating signals from the program controller 8 which are manually input based on the opening and closing of the detection switches 98 to 9d. A knitting fabric stand IO is arranged and installed at a predetermined distance from the thread winding stand l, and a large number of vibrators 11a. 1 lb. llc. l
ld is placed and installed. As shown in FIG. 3, the vibrator 1 1a=l ld has a front coil spring 15 fixedly and protrudingly provided at one end of an intermediate shaft l2 with a steel weight l4 having a threading hole l3 at its tip. , a rear coil spring l7 with a rod l6 interposed in the middle is integrally fixed and protruded on the other end side, and the vibrator 11a to lld are formed in a straight shape at the base end of the rear coil spring l7. Pillar! A wire 21 is suspended from a top plate 19 stretched at the upper end of the support 18 via a spring 20, and this wire 21 is wound around the intermediate shafts 12a-12d of each vibrator 11a-11d. The wire 21 is tightened to fix and hold each vibrator 11a-lid substantially horizontally, and the wire 21 is connected to the motor M. Connect it to the eccentric 23 installed in the. The motor M is manually powered by the programmable controller 8 so as to be driven when all the detection pins 6a-6d are in the open state. The bobbin winding rotors 28 to 2d, the thread guide shafts 4a to 4d, and the detection rods 6a to 6d are arranged in series with each other, and when the detection rods 6a to 6d are in the lowered position,
The threading holes 5a to 5d of the detection rods 6a to 6d are connected to the guide ring 4.
The threading holes 13a-13d of the vibrators 11a-lld are installed at a lower position than the threading holes 3a-3d of the vibrators 11a-11d and the threading holes 5a-13d of the detection rods 6a-6d.
Set the position higher than 5d. Therefore, a plurality of threads 25a unraveled from the knitted fabric 24 placed on the knitted fabric stand lO. 25b. 25c. 25d respectively connect the threading holes 5a to 5d of the detection rods 6a to 6d and the threading holes 3a to 3a of the guide shafts 4a to 4d from above the vibrator eyes a to 11d.
As shown in FIG. 2, the threads 25a to 25d are wound around each of the thread winding rotating bodies 2a to 2d through the threads 3d, and in a state where the detection rod 6a = 6d is lowered due to its own weight, the threads 25a to 25d are wrapped around the guide shafts 4a to 4d. threading holes 3a-3d and vibration i11a
-11d threading hole 1:la-13d, the thread is guided in an inverted triangular shape and wound around the thread winding rotating bodies 2a to 2d. When the threads 25a to 25d are caught in the eyelets of the knitted fabric, the threads 2Sa to 25d are caught in the threading holes 3a of the guide shafts 4a to 4d, as shown by the chain dots in FIG.
-3d and threading holes 13a-13 of vibrators 11a-11d
d, and the detection rods 6a to 6d are pulled up and float upward. The detection rods 6a to 6d are in the lowered position when the contact switch 9
a to 9d are closed, and the detection switches lla=lld are opened in the raised position of the detection switches 6a to 6d. The programmable controller 8 sets the respective clutches 78 to 7d in the human state when each of the detection switches 9a to 9d is in the closed state, and causes each of the detection switches 9a to 9d to be in the open state. When this happens, each clutch 7a to 7d is turned off, and all detection switches 9a to 9d are turned off.
When both become open at the same time. All clutches 9a
-9d is turned off, and in this state, vibrator 1
1a-1 to 1d to drive the motor M1, and the detection switches 9a to 1d are input to drive.
When one of 9d is closed, vibration l11a"ll
An input is made to stop the drive of the motor Ml for driving d, and an on/off operation signal is sent to the clutches 7a-7d and the vibrator 11a-1 based on the opening/closing of the detection switches 9a-9d.
A drive signal is given to the motor Mm of 1d. For example, when one yarn 25a among several WI yarns 2Sa to 25d gets caught in advance and becomes impossible to unweave, the yarn 25a becomes tense and pulls up the detection rod 6a to switch the detection switch. When 9a is opened, the programmable controller 8 sends a cut operation signal to the clutch 7a based on the open state of the detection switch 9a to stop the bobbin winding rotating body 2a. However, the other threads 25b to 25d are connected to the rotating body 2a.
Even when the thread 25a is stopped, unweaving continues, and when the thread 25a joins the thread 25a that is caught, the thread 25a is released from the thread 25a. Unhooked thread 25
When the tension of a is loosened and the detection switch 6a descends due to self-mold and the detection switch 9a is closed, the programmable controller 8 sends a large operation signal to the clutch 7a based on the closed state of the detection switch 9a and closes the bobbin winding rotor. Rotate 2a again. In this way, when some of the threads get caught among m threads, the rotation of only the bobbin winder that is caught is immediately stopped, and as soon as the catch is released, the rotation is restarted. Automatically and mechanically unravel lI&1. However, if all the threads 25a to 25d are caught at the same time, all the detection threads 68 to 6d
is lifted up at the same time and the detection switches 9a to 9d are closed at the same time,
sends a disconnection operation tS to all the clutches 98 to 9d to stop the rotation of all the bobbin winding rotors 2a to 2d. and.
Motor M. Send a drive operation signal to R motor M1
is driven, and the wire 21 is caused to repeat small expansion and contraction movements by the operation of the eccentric 23 and the elastic action of the spring 20, and the vibrator 11a-11d 4,:li is moved and a small pull is applied to the stitches that are caught. The catch is automatically and mechanically released by applying a forceful impact. Then, when the hook in the stitch is released,
When the tension in the threads 25a to 25d is loosened, the detection rods 6a to 6d descend under their own weight and close the detection switches 9a to 9d, and the programmable controller 8 gives a stop signal for driving the motor M1 and an input signal for the clutches 7a to 7d. Thread winding rotating body 2a
~2d rotates again. In this embodiment, the programmable controller IO is used as the device for turning on and off the clutches 9a to 9d, but the operation may be performed using a separate electrical control device such as a sequence control device. Good too. Further, the motors M8 of the vibrators 11a to 11d may be configured to provide a drive operation signal not only when all the detection switches 98 to 9d are opened, but every time one detection switch is opened. [Effects of the Invention] Since the present invention is configured as described above, it achieves the following effects. The unraveling device for stockinette knits passes multiple threads unraveled from the knitted fabric through the threading hole of the vibrator, through the threading hole of the vibrator, through the threading of the detection rod and the threading of the guide shaft, and onto the bobbin winding rotating body. When rewinding, when the detection rod is lowered, it detects that the thread is unraveled, and the clutch is activated to keep the thread winding rotating body rotating. ? I When one of several threads gets caught, the tension of the thread pulls up the detection rod to detect the thread and temporarily stop the rotation of the bobbin winder that caused the catch. The machine waits until other threads reach the stitch where the catch occurred, and then all the threads line up in the same stitch and the catch is automatically released.
Then, when the hook is released, the detection thread is lowered by its own weight to detect the unraveling of the thread, and the stopped bobbin is rotated again. In addition, when all the detection units detect that all the threads are caught, all the bobbin winding rotating bodies are stopped, and the vibrator is vibrated to apply small tensile force shocks to the stitches to prevent the threads from being caught. can be resolved. In this way, even if the preceding thread gets caught due to the difference in the unraveling speed of multiple threads, the caught thread will not be cut and stockinette knitting will be carried out automatically and mechanically in an unattended state. This made it possible to unwind the thread and unwind it back into the spool.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the unraveling device, Fig. 2 is an enlarged perspective view of the main parts, Fig. 3 is an enlarged front view of the vibrator, and Fig. 4 is a block diagram. 2a-2d. ．． ．． Spindle rotating body 4a-4d. ．．
．． Guide shafts 6a-6d. ．． ．． Detection rod 7a-
7d. ．． ．． Clutch 8...Programmable controller 98-9d. ．． ．． Detection switches 11a-11d. ．． ．． Vibrator M,,M. ．． ．． ．． Motor patent applicant Osuzu Kogyo Co., Ltd.

Claims (1)

[Claims] at least two thread-wound rotors, a device for rotationally driving the thread-wound rotors, a clutch provided for each of the thread-wound rotors, a device for detecting a state in which the threads of the knitted material cannot be unraveled; A vibrator that vibrates the pulled-out yarn; a drive device that vibrates the vibrator; and an on/off operation for the clutch and a drive device that vibrates the vibrator based on whether unweaving of the knitted fabric is possible or not possible. A stockinette knitting unraveling device characterized by comprising a driving device and a device for driving and operating a driving device.