JPH0447063B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an unraveling device for stockinette knitted fabrics.

[Prior art] Conventionally, stockinette knitting uses high-quality yarn, so if a knitting loss occurs, it is unraveled and re-wound onto the spool for reuse. There are those knitted with thread, those knitted with two threads, or those knitted with two to several dozen threads, and those knitted with one thread do not get caught. However, when knitting with multiple threads, if you do not unravel the threads at the same time in the stitch, for example, one of the threads may lead or fall behind. If it is unraveled, the mesh is complicated and it tends to get caught. In other words, when knitting with two or more threads, different tensions are applied to each of these threads, so when the stockinette knit is unraveled, When knitting, a thread with a weaker tension will become looser, longer, and unravel than a thread with a stronger tension. Japanese Patent Application No. 1-8169 filed by the same applicant as this application has been proposed as a mechanical device for unwinding such a stockinette knitted fabric and rewinding it into a bobbin.
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 it is impossible to unravel the threads of the knitted material, and It consists of a device that operates the clutch on and off based on the state in which unraveling is possible and the state in which unraveling is not possible. When winding and unwinding each thread around the rotating body, when a thread that has become caught among multiple threads is detected, the clutch provided on the bobbin winding rotating body for the thread that has become caught is released. In this state, only the rotation of the bobbin winding rotor that caused the catch is stopped instantly, and the thread that has been rewound to the other bobbin winder rotary bodies waits until it reaches the stitch location where the catch occurred. Automatically releases the catch when the threads are aligned in the same stitch. When it is detected that all threads are caught at the same time, all clutches are disengaged, all bobbin winding rotors are temporarily stopped, and all clutches are instantaneously engaged. Repeat,
All of the thread-wound rotating bodies are moved in small increments to apply an instantaneous tensile force to the stitches, thereby eliminating the snags.

[Problems to be solved by the invention] However, in the stockinette knitting unraveling device according to the invention of Japanese Patent Application No. 1-81696, when all the threads are caught at the same time, all the clutches are The method of applying an instantaneous tensile force to the stitches by stopping the clutch and repeating the instantaneous cutting-in operation of the clutch to move the bobbin rotating body in increments is a method that can be used to untie the stitches if they are weakly tied. However, if the stitches are stiff, the impact applied to the stitches is weak, so the stitches cannot be unraveled, and the amount of inching of the bobbin winding rotating body increases, exceeding the limit of yarn tension, and causing the yarn to break before the stitches unravel. Furthermore, if the clutch is repeatedly engaged and engaged, there is a problem with the lifespan of the clutch, and there are many problems with the clutch.

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 to the bobbin rotating body through a vibrator, passing through the detection device and the thread guide of the thread guide shaft, and when it is detected that all the threads are caught, all of the bobbin rotating bodies are The rotation of the stitches is stopped once, and the vibrator is vibrated to apply a strong impact with small pulling force that is sufficient to loosen tight knots in the stitches, making it easy and sure that the stitches are caught. It is an object of the present invention to provide a stockinette knitting unraveling device that can solve the problem.

[Means for Solving the Problems] In order to achieve the above object, the unraveling device for stockinette knitting according to the present invention includes at least two thread-wound rotating bodies, a device for rotationally driving the thread-wound rotating bodies, and a thread-wound unraveling device of the present invention. A clutch provided for each rotating body, a device for detecting a state in which unweaving of the knitted yarn is impossible, a vibrator that vibrates the yarn pulled out from the knitted fabric, and a drive device that vibrates the vibrator. The apparatus comprises a device for turning on and off the clutch and driving the vibrator, depending on whether the knitting is possible or impossible.

[Function] Multiple threads unraveled from the knitted fabric are wound back to the bobbin rotating body through the vibrator, the threading of the detection rod and the threading of the guide shaft, and the threads are unraveled. When the detection bar is in the lowered position, the detection switch is closed, the clutch is held in the on position, and the bobbin winder is rotated. The tension of the thread causes the detection rod to be pulled up and raised to detect the thread being caught, and as the detection rod rises, the detection switch is opened to prepare for the thread being caught in the bobbin winding rotating body. The clutch is disengaged to instantly stop only the rotation of the bobbin winding rotating body that has become stuck. However, since the clutches of the other bobbin winding rotors are in the engaged state, these threads are still unwound and wound back onto the bobbin winding rotary body, and when these threads reach the stitch point where the catch occurred, Then, all the threads are aligned in the same stitch and the threads are automatically released. Also, if all the threads get caught at the same time,
That is, when all the detection rods are raised and all the detection switches are in the open state, all the clutches are opened to temporarily stop all the bobbin rotating bodies and to drive the vibrator drive device. By slightly expanding and contracting the wire using an eccentric motion, a vibrator connected to the wire is vibrated and a strong impact force is applied to the stitches by small tension, thereby eliminating the snag. . And when the hold is released,
The tension in the stopped thread is loosened, and the detection rod descends due to its own weight, closing the detection switch, stopping the drive of the vibrator, and at the same time turning on the clutch to rotate all the stopped bobbin rotating bodies again.

[Example] Examples will be described with reference to the drawings.

In FIG. 1, at least two thread winding rotors 2a, 2b, 2c, and 2d are rotatably installed on the top surface of a thread winding stand 1, and thread passing holes 3a, 3b, and 3 are provided in the head.
Guide shafts 4a, 4b, 4c, 4d with c, 3d
are installed vertically facing each of the thread-wound rotating bodies 2a to 2d, and the guide shafts 4a to 4d.
Thread hole 5 in the head at a certain distance from
Detection rods 6a, 6 with a, 5b, 5c, 5d
b, 6c, and 6d are installed so as to be able to rise and fall freely, and the thread-wound rotating bodies 2a to 2d are continuously rotated at the same rotational speed by a motor _M1 , and the thread-wound rotating bodies 2
a to 2d are respectively clutches 7a, 7b,
7c and 7d are provided, and the clutches 7a to 7d
A programmable controller 8 is provided as a device for turning on and off the detection rods 5a to 5a.
6d is connected to the detection switches 9a, 9b, 9c, and 9d of the program controller 8, and the clutches 7a to 7d are turned on by the operation signal of the program controller 8 input based on the opening/closing of the detection switches 9a to 9d. Allows for free cutting operation.

A knitting fabric stand 10 is arranged and installed at a predetermined distance from the thread winding stand 1, and a large number of vibrators 11a, 11b, 1 are installed between the thread winding stand 1 and the knitting fabric stand 10.
1c and 11d are arranged and installed.

As shown in FIG. 3, the vibrators 11a to 11d each have a threading hole 13 at the tip on one end side of the intermediate shaft 12.
A front coil spring 15 with a weight 14 having a weight 14 is integrally fixed and protruded, and a rod 1 is provided in the middle on the other end side.
A rear coil spring 17 with a coil spring 6 interposed therebetween is integrally fixed and protruded, and the whole is formed in a straight shape. 1
8, a wire 21 is suspended from a top plate 19 stretched at the upper end via a spring 20, and this wire 21
are intermediate shafts 12a to 12 of each vibrator 11a to 11d.
d to fix and hold each vibrator 11a to 11d substantially horizontally, and at the same time, the wire 21 is
It is connected to an eccentric 23 provided on the motor M ₂ via a trochanter 22 provided at the lower end of the motor M 2 .

The motor _M2 is inputted to the programmable controller 8 so as to be driven when all the detection rods 6a to 6d are in an open state.

The thread winding rotating bodies 2a to 2d and the thread guide shafts 4a to 4
d 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 shafts 4a to 4a. The threading holes 13 of the vibrators 11a to 11d are installed at a lower position than the threading holes 3a to 3d of the vibrators 11a to 11d.
a~13d are threading holes 5a~ of the detection rods 6a~6d.
The setting position is higher than 5d. Therefore, a plurality of threads 25a, 25b, 25c, and 25d unraveled from the knitted fabric 24 placed on the knitted fabric stand 10 are threaded through the detection rods 6a to 6d from above the vibrators 11a to 11d, respectively. It passes through the holes 5a to 5d and the thread passing holes 3a to 3d of the guide shafts 4a to 4d, and is wound around each of the thread winding rotating bodies 2a to 2d, and the detection rod 6
In the state where the threads a to 6d are lowered by their own weight, as shown in FIG. ~13d, and are guided in an inverted triangular shape between the bobbin winding rotating bodies 2a~2.
wrapped around d. And the threads 25a to 25d
In a state where the stitches get caught in the stitches of the knitted fabric,
As shown by the chain dots in FIG.
d is tensioned between the threading holes 3a to 3d of the guide shafts 4a to 4d and the threading holes 13a to 13d of the vibrators 11a to 11d, and the detection rods 6a to 6d are pulled up and raised.

The detection rods 6a to 6d close the detection switches 9a to 9d in the lowered position, and the detection rods 6a to 6d close the detection switches 9a to 9d.
6d is in the raised position and the know switches 11a to 11d
It is provided so that it can be opened.

The programmable controller 8 controls each of the clutches 7a to 7 when each of the detection switches 9a to 9d is in a closed state.
d to the on state, and turn each detection detection switch 9
When the respective clutches a to 9d are in the open state, each of the clutches 7a to 7d is set to the disengaged state, and furthermore, when all the detection switches 9a to 9d are in the open state at the same time, all the clutches are set to the disengaged state. Clutch 9
a to 9d are in the off state, and in this state,
The motor _M2 for vibrating the vibrators 11a to 11d is input to drive, and when one of the detection switches 9a to 9d is closed, the motor for driving the vibrators 11a to 11d is activated.
An input is made to stop the drive of _M2 , and the clutch 7a is activated based on the opening/closing of the detection switches 9a to 9d.
On/off operation signals to ~7d and vibrators 11a~11d
to give a drive signal to motor _M2 .
For example, when one yarn 25a among the plurality of yarns 25a to 25d gets caught in advance and becomes impossible to unweave, the yarn 25a becomes tense and the detection rod 6a is pulled up and detected. When the switch 9a is opened, the programmable controller 8 sends a disconnection 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 yarns 25b to 25d continue to be unraveled even when the rotating body 2a is stopped, and when they merge with the caught yarn 25a, the yarn 2
Release the hook of 5a. The tension of the thread 25a released from the hook is relaxed, and the detection rod 6a descends due to its own weight, and when the detection switch 9a is closed,
Programmable controller 8 detects switch 9
Based on the closed state of the clutch 7a, an engagement signal is sent to the clutch 7a to rotate the thread winding rotating body 2a again. In this way, when some threads among multiple threads become caught, the rotation of only the bobbin winder rotating body causing the catch is immediately stopped, and as soon as the catch is released. By rotating it again, the unraveling continues automatically and mechanically. However, if all the threads 25a to 25d become caught at the same time,
When all the detection rods 6a to 6d are pulled up at the same time and the detection switches 9a to 9d are closed simultaneously, the programmable controller 8 sends a disconnection signal to all the clutches 9a to 9d to close all the bobbin rotating bodies 2a. Stop the rotation of ~2d, and
A drive operation signal is sent to the motor M ₂ , and the motor M ₂ is driven to cause the wire 21 to repeat small expansion and contraction operations due to the operation of the eccentric 23 and the elastic action of the spring 20.
d is vibrated to apply a small impact with a tensile force to the stitches causing the catch, thereby automatically and mechanically releasing the catch. Then, when the stitch is released, the thread 25a
~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 _M2 and an input signal for the clutches 7a to 7d. The thread-wound rotating bodies 2a to 2d rotate again.

In this embodiment, a programmable controller 10 is used as a device for turning on and off the clutches 9a to 9d, but it is also possible to use a separate electrical control device such as a sequence control device. Good too.

Moreover, the motor _M2 of the vibrators 11a to 11d is
The drive operation signal may be applied not only when all the detection switches 9a 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 produces the following effects.

The unraveling device for knitted stockinette fabrics passes multiple threads unraveled from the knitted fabric one by one 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 winder. When rewinding, when the detection rod is lowered, it detects that the thread is unraveled, and the clutch is turned on to keep the bobbin winder rotating, and one of the threads is unwound. When a thread becomes caught, the detection rod is pulled up by the tension of the thread, the thread is detected, and the rotation of the bobbin winder rotating body where the thread is caught is temporarily stopped. The thread waits until it reaches the stitch location where the thread is caught, and the thread is automatically released when all the threads are aligned in the same stitch. Then, when the hook is released, the detection rod is lowered to the lower position by its own weight, detects the state in which the thread is unraveled, and rotates the stopped bobbin winder again. In addition, when all the detection rods detect that all the threads are caught, all the bobbin winding rotating bodies are stopped, and the vibrator is vibrated to apply a slight tension shock to the stitches. By giving this, the problem 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 the machine will automatically and automatically This made it possible to unravel the stockinette fabric and then wind it back onto 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 essential parts, FIG. 3 is an enlarged front view of the vibrator, and FIG. 4 is a block diagram. 2a to 2d...Pitch rotating body, 4a to 4d...Guide shaft, 6a to 6d...Detection rod, 7a to 7d...Clutch, 8...Programmable controller, 9
a to 9d...detection switch, 11a to 11d...
Vibrator, M ₁ , M ₂ ... motor.

Claims (1)

[Claims] 1 At least two thread-wound rotors, a device for driving the thread-wound rotors, and an electromagnetic clutch provided for each of the thread-wound rotors; the clutches are engaged and operated based on a state in which unweaving is possible and an inexplicable state. A vibrator comprising a detection rod installed at a predetermined distance from the thread-wound rotating body so as to be movable up and down for each thread-wound rotating body, and a weight threaded through the tip of a coil spring. and a device for applying vibration to the vibrator, the vibrator being arranged and installed at a position higher than the detection rod between the thread winding table and the knitted fabric, and the knitting yarn pulled out from the knitted fabric passed from the vibrator to the detection rod. A device that detects whether or not unweaving is possible based on the rise and fall of a detection rod that is wound around a bobbin rotating body due to the tension and relaxation of the thread, and each detection rod is attached to each electromagnetic clutch at the lowered position. a device for sending an engagement signal to each clutch and a disengagement signal to each clutch at the raised position of the detection rod; and a device for sending an entry operation signal to the vibrating device based on the raising of at least one detection rod and for the lowering position of all the detection rods; and a device for sending a cutting operation signal to a vibrating device based on the following.