JP3163988B2 - Spinning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning apparatus for twisting a supplied fiber bundle to form a yarn, and more particularly to a device for detecting a yarn defect by measuring a yarn tension.

[0002]

2. Description of the Related Art As a conventional spinning device, a short fiber bundle such as cotton or a long fiber bundle (sliver) such as wool stretched in a draft portion is twisted by a spinning portion (air spinning nozzle, false twist device). As a result, there is a binding yarn that is wound around a winding package while being traversed by a winding unit (traverse device, friction roller).

[0003] In the above-described twisted binding yarn, a fiber bundle mainly on the surface side thereof is mainly twisted.
Therefore, if the binding of the fiber bundle is loosened during spinning, the binding yarn swells and becomes slightly thicker, or the binding of the fiber bundle decreases and becomes slightly thinner. appear. In addition, defects such as slabs, thick yarns, and thin yarns occur in the binding yarn. When a binding yarn having such a defect is wound on a winding package and put on a loom, various problems such as breakage of the binding yarn occur.

Therefore, in the conventional spinning apparatus, before the wound binding yarn is wound into a winding package, the binding yarn is passed through an electrostatic or optical slab catcher to change the cross-section of the binding yarn (change in outer diameter). ) Is measured to detect the various defective yarns described above.

[0005]

However, the conventional method of measuring the cross-sectional change of the binding yarn with a slab catcher and detecting various defective yarns is effective when the cross-sectional change amount is large. However, when the amount of change in cross section is delicate, it is necessary to increase the sensitivity. In particular, as described above, the weak yarn is generated when the binding of the fiber bundle is loosened, the binding yarn expands and becomes slightly thicker, or the binding of the fiber bundle decreases and becomes slightly thinner. The sensitivity was too high, erroneous detection due to noise or the like occurred, and the weak yarn could not be detected with high accuracy. In particular, in the spinning device, since the yarn continuously sent out by the spinning unit is wound by the winding unit, even if a weak yarn is generated, the tension is rarely cut, and the yarn is wound directly onto the winding package. There is a problem of being taken. In addition, the problem of the weak yarn is a problem that is not limited to the spinning device for the bound yarn but also to the spinning device for the real twisted yarn.

[0006] spinning equipment of the present invention has been made to solve this problem, by measuring the tension of the thread, it is to accurately detect a defect of the yarn.

[0007]

According to the present invention, there is provided a spinning apparatus according to the present invention.
A spinning unit that twists the fiber bundle to make yarn, and the spinning unit
A delivery roller that sends out these yarns and this delivery roller
And a winding section for winding the yarn sent out by the spinning machine.
An apparatus for measuring a thickness of the yarn to detect a defect in the thickness of the yarn.
A thickness detection unit for detecting the tension of the yarn by measuring the tension of the yarn.
A tension detecting unit for detecting a twist defect;
The scoring unit applies a swirling airflow to the supplied fiber bundle to twist
A type having a pneumatic spinning nozzle for applying the tension detection
The part detects the resultant force of the tension of the bent yarn.
And provided downstream of the delivery roller.
Things. By measuring the thickness of the thread,
By detecting thick yarn, thin yarn and slab and measuring the tension
Weak yarn can be detected.

[0008] The spinning apparatus according to claim 2 is a fiber bundle to be supplied.
Spinning unit that twists yarn into yarn, and yarn from this spinning unit
And the delivery roller that sends
A spinning device comprising a winding section for winding the output yarn.
The thickness of the yarn for detecting a yarn defect by measuring the thickness of the yarn.
And a yarn detector for detecting a yarn defect by measuring the yarn tension.
Process the signal from the tension detector
Outputs a defect signal, processes the signal from the thickness detector, and
An evaluation unit that outputs a yarn defect signal or a fine yarn defect signal is provided.
The spinning unit creates a swirling airflow in the supplied fiber bundle.
It is a type having a pneumatic spinning nozzle for making and twisting,
The tension detector detects a resultant force of the tensions of the yarns in the bent state.
And is installed downstream of the delivery roller.
It is something that has been damaged. This measures the thickness of the yarn
To detect thick yarn, thin yarn and slab and measure tension
By doing so, the weak yarn can be detected.

According to a third aspect of the present invention, a fiber bundle to be supplied is provided.
Spinning unit that twists yarn into yarn, and yarn from this spinning unit
And the delivery roller that sends
A spinning device comprising a winding section for winding the output yarn.
Measuring the thickness of the yarn and detecting defects in the thickness of the yarn
Thickness detecting section, which measures the tension of the yarn and detects the twist of the yarn.
A tension detector that detects defects and a signal from the tension detector
Process and output the weak yarn defect signal, and the signal from the thickness detector
To output a thick yarn defect signal or a fine yarn defect signal
And a spinning unit, wherein the spinning unit
An air spinning nozzle that twists by applying swirling airflow,
A pair of rollers that are axially crossed and are supported in contact
The fiber bundle delivered from the air spinning nozzle
Provisional twisting in the opposite direction to the swirling airflow by the pneumatic spinning nozzle
A twisting device, wherein the tension detecting unit is in a bent state.
Detecting the resultant force of the tension of the drawn yarn,
Provided between the device and the delivery roller
It is. By measuring the thickness of the yarn,
By detecting yarn, fine thread and slab and measuring the tension
Weak yarn can be detected.

[0010]

[0011]

[0012]

[0013]

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A spinning apparatus and a spinning method according to the present invention will be described with reference to the drawings.

First, a spinning apparatus according to the present invention will be described with reference to FIGS.
It will be described based on. In FIG. 1, the spinning device 1 includes a large number of spinning units 1u arranged side by side, as shown in FIG. 2, and a self-propelled type that reciprocates in the machine base longitudinal direction of the spinning device 1 along each spinning unit 1u. 3 (also shown in FIG. 3). The spinning unit 1u includes a drafting section 2, a spinning section 5 including an air spinning nozzle 3, and a false twist device 4, a delivery roller 6, a tension detecting section 8 including a tension sensor 7 for measuring the tension of the binding yarn Y, and the like. A slack tube 9 for removing slack, a slab catcher 10 for measuring the thickness of the binding yarn Y, and a winding section 11 are provided in series from the upstream side to the downstream side.

The draft section 2 includes a back roller pair 15, a middle roller pair 17 on which an apron belt 16 is mounted, and a front roller pair 18. Among the draft roller pairs, the front roller pair 18 has its bottom roller provided on a line shaft common to each unit and is driven simultaneously by all units. However, the other rollers can be stopped for each unit. ing.

The air spinning nozzle 3 has a front roller pair 1
8, a compressed air injection hole is opened in the direction of contact with the inner surface of the nozzle, and compressed air is injected from the compressed air injection hole. This generates a swirling airflow in the air spinning nozzle 3 in a direction opposite to the twisting direction of the false twisting device 4 described later. The air spinning nozzle 3 is connected to a pressure supply source for supplying compressed air via an air supply pipe (not shown), a mechanical valve, or the like, and the supply of compressed air is stopped by operating the mechanical valve. I have. The compressed air injection holes are provided so as to be inclined toward the yarn traveling direction, that is, toward the downstream side, so that suction airflow is easily generated near the introduction side of the air spinning nozzle 3.

The false twisting device 4 includes a pair of rollers 20 and 21 which are axially crossed and axially supported in a contact state. Each of the rollers 20 and 21 is a hollow roller formed by externally fitting a thin roller made of a flexible elastic material such as rubber on a roller core body, and has a central portion having an arc-shaped cross section with respect to both peripheral surface ends. It has the shape of a bulging barrel. Each of the rollers 20 and 21 has a belt wound between a pulley (not shown) provided at an end of the rotary shaft and a pulley fixed to the rotary shaft of the motor, and the motor rotates at a constant peripheral speed. It is to be rotated synchronously. By the air spinning nozzle 3 and the false twisting device 4, the fiber bundle S stretched in the draft part 2 is formed into a binding yarn Y. This binding yarn Y
Has a structure in which a group of fibers arranged substantially linearly is used as a core fiber, and a wound fiber is spirally wound around the core fiber.

The delivery roller 6 is provided with a nip roller 25 which can be freely contacted. Nip roller 25
Is urged in the clockwise direction in the figure by a spring (not shown), and is pressed against the delivery roller 6 so that the binding yarn Y
(Spun yarn) can be sent out.

The slab catcher 10 measures the cross-sectional change (thickness) of the binding yarn Y to determine the slab of the binding yarn Y,
It measures defects such as thick yarns and thin yarns including weak yarns, and yarn breakage. When these are measured, a thickness measurement signal is output.

The winding unit 11 is rotatably supported by the cradle arm while traversing the binding yarn Y by a traverse device (not shown), and is wound on a winding package P which is pressed against the friction roller 26 and rotates. Things.

As shown in FIGS. 3 and 4, the piecing apparatus 12 is not disposed in each of the spinning units 1u, but a piecing carriage 30 common to the spinning apparatuses is movably disposed. That is, as shown in FIG.
The piecing device 12 is arranged in the U-shaped space 31 and is guided by a rail to move in front of the spinning unit 1u that requires piecing, and performs piecing. The piecing carriage 30 has a device having a piecing function called a knotter 32, and has a suction pipe (spinning section side yarn suctioning member) 33 having a substantially circular suction hole at the tip and a flat suction port at the tip. And a suction mouth (a winding part side yarn suction member) 34.

Next, the tension detecting section 8 will be described with reference to FIGS. 4 to 6, the tension detecting unit 8 includes a tension sensor 6 for measuring the tension of the binding yarn Y twisted by the false twisting device 4, and a tension sensor 6.
And an evaluation unit 51 that evaluates the defect of the binding yarn Y based on the measurement signal measured in the step (a).

First, in FIGS. 4 and 5, the tension sensor 6 is provided on the elastic plate 3 disposed in the sensor body 35.
6 and a guide rod (thread guide support) 37 and a strain measuring member 38.

The guide rod (thread guide support) 37 is fixed to the elastic plate 36 at its base end so as to project from the elastic plate 36 at right angles (substantially at right angles). . Further, as shown in FIG. 1, the guide rod 37 is inserted into the cylindrical portion of the inner case, and the distal end of the guide rod 37 projects outward from the cylindrical portion. A thread guide 39 is detachably supported at the distal end of the guide bar 37. The binding yarn Y in a bent state by the delivery roller 6 (nip roller 25), the yarn guide 39, and the slab catcher (thickness detection unit) 9.
Are orthogonal to the bent surface A (shown in FIG. 5) formed by A uniform gap is provided in the circumferential direction between the outer peripheral surface of the guide rod body 37 and the inner peripheral surface of the cylindrical portion, and the guide rod body 37 (that is, the thread guide 39) is movable by the gap. Has become. That is, the cylindrical portion (strictly, the distal end portion of the cylindrical portion) is a stopper that limits the movable range of the guide rod.

The elastic plate 36 is made of, for example, a hollow metal plate, and is disposed in the internal space of the sensor body 35 in parallel with the bent surface A (the binding yarn Y). Also, the elastic plate 36
5, as shown in FIG. 5, the direction in which the resultant force F of the tension T applied to the upstream side (delivery roller 6 side) and the downstream side (winding package P side) of the binding yarn Y from the guide rod body 37 acts. Both ends are supported at two points by bolts and the like of the sensor body 35. In addition, it is good also as single point support. As a result, when the guide rod 37 is bent (oscillated) by the resultant force F, the resultant force F is transmitted to the elastic plate 36.
The point-supported elastic plate 36 is corrugated between two points with reference to the base end of the guide rod 37. That is, when the guide rod body 37 bends, the elastic plate 36 is depressed so as to be away from the binding plate Y on the side where the resultant force F acts, and is wavy so that the opposite side of the resultant force F is expanded so as to approach the binding yarn Y. Be transformed. Preferably, the thickness of the elastic plate 36 is set to a thickness that allows the above-described wavy deformation in accordance with the tension of the binding yarn Y that slightly changes.

The strain measuring section 38 includes a plurality of strain gauges (for example, metal grade strain sensitive resistors) 40 provided on the elastic plate 36. Each strain gauge 40
Are fixed at locations where the wavy deformation of the elastic plate 36 appears remarkably in the direction in which the resultant force F acts on the guide rod 37 as a boundary, and the elongation of the elastic plate 36 due to the wavy deformation (dents and bulges). Shrinkage (distortion) can be measured. Each of the strain gauges 40 is connected to a controller board 45. The controller board 45 uses the amount of strain of the elastic plate 36 (the tension of the binding yarn Y) as a tension measurement signal and an evaluation unit 51 (see FIG. 6
). Further, an additional controller board 45a having a function for each model is embedded in a resin layer 46 filled so as to close the internal space of the sensor body 35 as necessary. The strain gauge 40
May be attached to the elastic plate 36 and arranged.
Further, the plate may be directly arranged on the elastic plate 36 by a flat printing method or the like.

As shown in FIGS. 1 and 3, the tension sensor 7 configured as described above includes a delivery roller 6 and a slack tube (slack removal tube) 10.
Between the slab catcher (thickness detecting unit) 10 after passing through the sensor body 35 so as to change the traveling direction so as to bend the binding yarn Y passing through the delivery roller 6 and head toward the winding package P. The flange 35A formed at
) Is attached to the spinning device 1 to be fixed.

The spinning controller 50 connected to the controller board 45 of the tension sensor 7 as described above
As shown in FIG. 6, an evaluation unit 51 and a spinning control unit 52 are configured as main components. The evaluation unit 51 receives the tension measurement signal output from the tension sensor 7 and the thickness measurement signal output from the slab catcher 10,
These measurement signals are compared with a predetermined range of the tension reference value and the thickness reference value, and defects (slabs, thick yarns, fine yarns, and weak yarns) of the binding yarn Y, and a tear off of the winding package P, This is to evaluate the occurrence of winding failure such as stick winding.

More specifically, the evaluation unit 51 compares the tension measurement signal output from the tension sensor 7 with a tension reference value to generate a weak yarn of the binding yarn Y, Evaluate the occurrence of stick winding. That is, the evaluation unit 51
Stores a tension reference value corresponding to the weak yarn of the binding yarn Y, the traversing of the winding package P, and the rod winding. As the tension reference value, an average value of the decrease in tension, and data relating to the amplitude and the amplitude time of the average value are stored separately for the weak yarn of the binding yarn Y, the fall of the winding package P, and the rod winding.

Here, the weak yarn Y generated in the binding yarn Y is
The binding force of the wrapping fibers for binding the core fibers is generated by loosening. As shown in FIG. 8 described later, the above data shows that the tension is extremely reduced, the amplitude is small, and the amplitude time is relatively long. It is assumed. Further, the traversing of the winding package P is a phenomenon in which the binding yarn Y traversed by the winding package P falls into the paper tube of the winding package P for a moment and is returned to the traverse operation again. As shown in FIG. 9, which will be described later, in the above data, the tension is extremely reduced, and the amplitude and the amplitude time are short. Further, the rod winding of the winding package P refers to the winding package P
Is a phenomenon in which the binding yarn Y traversed to the paper package of the winding package P falls off and is returned to the traverse operation after the binding yarn Y is wound on the paper tube for a predetermined time. As shown in FIG. 10, which will be described later, the above data has a small decrease in tension, a large amplitude, and a long amplitude time.

Further, the evaluation unit 51 compares the thickness measurement signal output from the slab catcher 10 with a thickness reference value to evaluate the generation of the slab, the thick yarn and the fine yarn of the binding yarn Y. That is, the evaluation unit 51 further stores a thickness reference value corresponding to the slab and the thick yarn of the binding yarn Y. The thickness reference value is data having a predetermined allowable range for the thickness (cross section) of the normal (no defect) binding yarn Y.

As described above, the evaluation unit 51 receives the data of the above-described weak yarn of the binding yarn Y, the fall of the winding package, and the rod winding, and receives the tension reference value and the tension sensor 10.
Is compared with the tension measurement signal output by the controller, and when the tension measurement signal corresponds to each data of the tension reference value, the weak yarn defect signal, the twill drop defect signal and the rod winding defect signal corresponding to each data. Is output to the spinning control unit 52. Further, the evaluation unit 51 compares the thickness reference value with the thickness measurement signal output by the slab catcher 10, and when the thickness measurement signal exceeds the range of the thickness reference value, A defect signal is output to the spinning control unit 52, and when the thickness measurement signal is smaller than the range of the thickness reference value, a fine yarn defect signal is output to the spinning control unit 52. Then, the spinning control unit 52, which has received the respective defect signals from the evaluation unit, stops the spinning and displays the respective defects on a printer or an alarm device (not shown).

The spinning apparatus 1 according to the present invention is configured as described above. Next, a method for spinning the binding yarn Y using the spinning apparatus 1 will be described.

In FIG. 1, a sliver S (fiber bundle) wound in a coil shape around a cylindrical can K is passed through each of the rollers 15, 17, 18 of the drafter unit 2 driven in a pressed state. The drafts are sequentially drafted, and are ejected from the compressed air injection holes of the air spinning nozzle 3 arranged downstream of the front roller pair 18 to the false twisting device 4 while generating a swirling airflow in the opposite direction to the twisting direction of the false twisting device 4.

Then, a pair of rollers 20,
When the sliver S (fiber bundle) passes through the sliver S, the sliver S (fiber bundle) is twisted to be in the state of the binding yarn Y, and is drawn out between the rollers 20 and 21 of the false twisting device 4 by the delivery roller 6 and the nip roller 25. Then, the twisted binding yarn Y
Is the guide rod 3 of the tension sensor 7 of the tension detector 8
After being bent at 7, it passes through the slack tube 9 and the slab catcher 10 and is taken up by the friction roller 26 into the take-up package P while being traversed by means not shown.

As described above, when the binding yarn Y passes through the guide rod 37 of the tension sensor 7, the upstream side (the delivery roller 6 side) and the downstream side (the winding package P) of the bent binding yarn Y are bent. When the guide rod 37 falls down due to the resultant force F of the tension T applied to the side (shown in FIG. 5), the elastic plate 36 is deformed in a wavy manner. Thereby, each strain gauge 4
0 continuously measures the expansion and contraction (strain) of the elastic plate 36 due to the wavy deformation of the elastic plate 37,
5 through the spinning controller 50
(Evaluation unit 51). At the same time, the slab catcher 10 also continuously measures the thickness of the binding yarn Y, and sends a thickness measurement signal to the spinning controller 50 (evaluation unit 5).
Output to 1).

That is, when a weak yarn (including twill drop or bar winding) is generated in the binding yarn Y, the tension of the binding yarn Y is reduced and the guide rod 37 falls down normally (no defect). Y
And the wavy deformation of the elastic plate 36 is also reduced, so that the wavy deformation of the elastic plate 36 is also reduced.
As described above, each of the strain gauges 40 measures the weak yarn generated in the binding yarn Y, the twilling generated in the winding package P, and the increase / decrease of the wavy deformation of the elastic plate 36 in accordance with the rod winding. Then, the tension measurement signals are sequentially output to the spinning controller 50 (evaluation unit 51) via the controller board 45.

As described above, when the spinning controller 50 inputs each measurement signal, the evaluation unit 51 generates a defect of the binding yarn Y, a wrapping of the winding package P, and a generation of a rod winding as described below. To assess the presence or absence of

First, the evaluation section 51 determines that the tension measurement signal from the tension sensor 7 does not correspond to each data of the tension reference value, and that the thickness measurement signal from the slab catcher 7 falls within the range of the thickness reference value. On the condition that there is no defect, it is evaluated that no defect occurs in the binding yarn Y, no twilling occurs in the winding package P, and no bar winding occurs, and no defect signal is output to the spinning control unit 52. . Therefore, the spinning controller 50
The spinning control unit 52 of the above continues the spinning effect.

On the condition that the tension measurement signal from the tension sensor 7 corresponds to each data of the tension reference value, the evaluator 51 determines whether the binding yarn Y corresponding to the corresponding data has a weak yarn or The spinning control unit 52 evaluates that the package P has undergone the traversing and rod winding, and outputs a weak yarn defect signal, a traversing defect signal or a rod winding defect signal corresponding to the defect to the spinning control unit 52. Then, the spinning control unit 52 of the spinning controller 50 to which each of the defect signals has been input stops the execution of spinning and activates an alarm device (not shown) particularly when the winding of the winding package P has fallen or the rod has been wound. Notify the operator.

Further, the evaluation unit 51 evaluates that a slab and a thick yarn have occurred in the binding yarn Y on condition that the thickness measurement signal from the slab catcher 10 is equal to or larger than the range of the thickness reference value. Also, on condition that the thickness measurement signal is smaller than the range of the thickness reference value, it is evaluated that a fine yarn has occurred in the binding yarn Y, and a thick yarn defect signal and a fine yarn defect signal corresponding to the defect are spun. Output to the control unit 52. Then, the spin controller 52 of the spin controller 50 to which the defect signal has been input.
Stops the spinning effect.

As described above, when the spinning controller 52 of the spinning controller 50 inputs the defect signal of the binding yarn Y, the rollers 15, 17, and 18 of the draft unit 2 are stopped, and the sliver S (fiber bundle) is supplied. Is stopped, the air injection from the air spinning nozzle 3 is also stopped, and the piecing device 12 is moved to the spinning unit 1u in which the binding yarn Y has a defect.

Then, the weak yarn, the slab, and the thick yarn of the binding yarn Y wound around the winding package P by means not shown are cut and removed, and the suction pipe 33 of the piecing apparatus 12 is cut off.
Transports the binding yarn Y at the outlet of the pneumatic spinning nozzle 3 to the notter 32, and carries the binding yarn Y end of the winding package P to the notter 32 with the suction mouth 34, and performs splicing by the knotter 32 to perform spinning. Return to the state. Further, when the winding package P has fallen and rod winding occurs, an alarm is issued by the alarm device, and the operator corrects the winding and rod winding of the winding package P to return to a spinning-enabled state. The continuation device 12 may be configured to perform automatic processing.

In the spinning apparatus 1 and the spinning method of the present invention, the tension sensor 7 constituting the tension detecting section 8 is used.
Is provided between the delivery roller 6 and the slab chucker 10 to measure the tension of the binding yarn Y. However, the present invention is not limited to this, and as shown in FIG.
It may be provided between the delivery roller 6 and the false twist device 4 to measure the tension of the binding yarn Y. In FIG. 7, the same reference numerals as those in FIG. 1 indicate the same members. In this case, the tension sensor 7 can measure only the defect (weak yarn) of the binding yarn Y by the same method as described above.

When the tension sensor 7 is provided directly on the spinning device 1, the deformation of the elastic plate 36 due to the vibration generated in the spinning device 1 may be measured by each strain gauge 40. By mounting a vibration detection sensor), the vibration can be measured and detected, and the measurement signal by the vibration is removed from the tension measurement signal of each strain gauge 40 to improve the measurement accuracy by each strain gauge 40. Good.

Further, a tension sensor 7 is provided on the upstream side of the winding package P so as to measure the fluctuating tension of defects (weak yarn, fine yarn, slab, and thick yarn) generated in the binding yarn Y. Then, each defect (weak yarn, fine yarn, slab, and thick yarn) of the binding yarn Y can be measured without using the slab catcher 10. Particularly, as shown in FIG. 7, when the tension sensor 7 is provided on the delivery roller 6 and the false twisting device 4, the winding package P
The vibration to be taken up by is stopped by the delivery roller 6,
Easy and accurate binding yarn Y without being affected
Of defects (weak yarn, fine yarn, slab and thick yarn) can be measured.

Further, in the spinning apparatus 1 and the spinning method of the present invention, the tension sensor 7 is used to measure the tension of the binding yarn Y twisted by the false twisting apparatus 4, but the present invention is not limited to this. Instead, the present invention may be applied to a spinning device for a real twisted yarn.

Next, FIGS. 8 to 10 show the results of measurement of the weakness of the binding yarn Y, the traversing of the winding package P, and the fluctuation of the tension of the binding yarn Y in the rod winding by the tension sensor 7. FIG.

FIG. 8 shows the measurement results of the tension sensor 7 and the slab catcher 10 when a weak yarn is generated in the binding yarn Y. According to this, when measured by the tension sensor 7, the drop in the tension of the portion where the weak yarn has occurred becomes remarkable, so that the weak yarn can be accurately detected even when the variation in the thickness of the binding yarn Y is small. Can be.
On the other hand, when measuring the weak yarn with the slap catcher 10, the fluctuation of the thickness of the normal binding yarn Y only slightly changes, so that the weak yarn cannot be detected.

FIG. 9 shows a case where the winding package P has a shed, and FIG.
This shows the measurement result of the tension sensor 7 when it occurs. In both figures, when measurement is performed by the tension sensor 7, since a drop in the tension at the portion where the roll-off or stick winding occurs in the winding package P becomes remarkable, the winding package P
Can be detected. In FIG. 9, twill drop occurs twice, and in FIG. 10, rod winding occurs three times.

8 to 10, when the tension sensor 7 compares the measurement results of the weak yarn of the binding yarn Y, the fall of the winding package P, and the winding of the rod, the defects (weak yarn, twill, It is confirmed that there is a remarkable difference in the measurement results in the (winding). That is, the measurement result of the weak yarn generated in the binding yarn Y is characterized in that the tension of the binding yarn Y is remarkably reduced, the amplitude thereof is short, and the amplitude time is long. In addition, the measurement result of the traversing of the winding package P has a feature that the tension of the binding yarn Y decreases remarkably instantaneously and returns to the original state. Further, the measurement result of the rod winding of the winding package P is characterized in that the tension is reduced, the amplitude is large, and the amplitude time is long.

As described above, by setting each data of the tension reference value stored in the evaluation section 51 based on the measurement result of each defect (weak yarn, twill drop and stick winding), the binding yarn Y is generated. It is possible to reliably evaluate the weak yarn to be formed, the traversing generated in the winding package P, and the rod winding only by measuring the tension of the binding yarn Y.

If the tension fluctuation of the slab, the thick yarn and the fine yarn generated in the binding yarn Y is measured and stored as the data of the tension reference value of the evaluation unit 51, the measurement result of the tension sensor 7 can be obtained. Based on this, it is possible to simultaneously evaluate and detect the slab, the thick yarn and the fine yarn of the binding yarn Y.

[0055]

As described above, according to the present invention, claims 1 to 1 are provided.
According to the spinning device of No. 3, the tension of the yarn that fluctuates due to a defect such as a weak yarn generated in the yarn is measured by the tension detection unit, and the presence or absence of the defect of the yarn is detected based on the measurement result. Therefore, particularly, a defect of a yarn such as a weak yarn can be detected with high accuracy, and the quality of the produced yarn can be improved. Also, when measuring the tension of the yarn with the tension detector,
In addition, by measuring the thickness of the yarn with the thickness detector,
Yarns that are less likely to appear as fluctuating yarn defects and thickness variations
Of defects can be detected more accurately to detect yarn defects,
The quality of the produced yarn can be further improved.

[0056]

[0057]

[0058]

[0059]

[0060]

[0061]

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a spinning device.

FIG. 2 is a front view showing the spinning device.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a cross-sectional view illustrating a configuration of a tension sensor included in a tension detecting unit.

FIG. 5 is a front view illustrating a configuration of a tension sensor included in the tension detection unit.

FIG. 6 is a schematic diagram showing an evaluation unit of the tension sensor and a spinning controller.

FIG. 7 is a schematic perspective view showing a modification of the spinning device.

FIG. 8 is a graph showing a result of measuring a weak yarn of a binding yarn with a tension sensor and a slab catcher.

FIG. 9 is a graph showing a measurement result of a tension sensor when twilling occurs in a winding package.

FIG. 10 is a graph showing measurement results of a tension sensor when a rod winding occurs in a winding package.

[Explanation of symbols]

 Reference Signs List 1 spinning device 5 spinning unit 7 tension sensor 8 tension detecting unit 10 slab catcher 11 winding unit S sliver (fiber bundle) Y binding yarn

Claims (3)

(57) [Claims] (1) twisting a supplied fiber bundle into a yarn;
A spinning section, and a delivery belt for sending out yarn from the spinning section.
Roller and take up the yarn sent by this delivery roller
A spinning device comprising a winding section, wherein the thickness of the yarn is measured to detect a defect in the thickness of the yarn.
A detecting unit for detecting a yarn twist defect by measuring the yarn tension;
And a spinning unit for applying a swirling airflow to the supplied fiber bundle.
A type having an air spinning nozzle for twisting,
The force detector detects a resultant force of the tension of the bent yarn.
Type, provided downstream of the delivery roller
A spinning device. 2. The fiber bundle supplied is twisted into yarn.
A spinning section, and a delivery belt for sending out yarn from the spinning section.
Roller and take up the yarn sent by this delivery roller
A spinning device comprising a winding unit, wherein the yarn detecting unit detects the yarn defect by measuring the yarn thickness.
And a tension detector for detecting a yarn defect by measuring the yarn tension.
Processing the signals from the output section and the tension detection section to process the weak yarn defect signal
Is output and the signal from the thickness detector is processed to
And an evaluation unit that outputs a signal of a defective yarn or a fine yarn defect, and the spinning unit applies a swirling airflow to the supplied fiber bundle.
A type having an air spinning nozzle for twisting,
The force detector detects a resultant force of the tension of the bent yarn.
Type, provided downstream of the delivery roller
A spinning device. 3. The fiber bundle supplied is twisted into a yarn.
A spinning section, and a delivery belt for sending out yarn from the spinning section.
Roller and take up the yarn sent by this delivery roller
A spinning device comprising a winding section, wherein the thickness of the yarn is measured to detect a defect in the thickness of the yarn.
A detecting unit for detecting a yarn twist defect by measuring the yarn tension;
Process the output signal from the tension detector and the tension detector
Outputs the weak yarn defect signal and processes the signal from the thickness detector.
Evaluation unit that outputs a thick yarn defect signal or a fine yarn defect signal
The spinning unit is provided to cause a swirling airflow to act on the supplied fiber bundle.
Intersects the air spinning Bruno nozzle, the axial directions to apply a twist
Air-spinning consisting of a pair of rollers supported in contact
The fiber bundle sent from the nozzle is fed to the air spinning nozzle.
A false twist device for twisting in the opposite direction to the swirling airflow.
The tension detector detects the resultant force of the tension of the bent yarn.
The false twist device and the delivery bellow
A spinning device that is provided between the spinning machine.