JPH06271196A - Method and device for preventing thread breakage for weaving machine - Google Patents

Abstract

PURPOSE:To prevent the occurrence of thread breakage in the case of speeding up the weaving work by controlling a distance between a supply roll and a yarn guide variably so that a balloon, which is formed of the yarn delivered from the supply roll, at the maximum diameter is always formed. CONSTITUTION:A yarn (y) delivered from a cheese (b) as a supply roll passes through a yarn guide 4, a tensioner 6 and a slave catch 7, and the yarn (y) is traversed by a drum 1 with a groove, and simultaneously, wound by a large package P. In this case, the yarn guide 4 is formed so as to be moved freely by a moving mechanism in the direction for coming close and separating to/from the cheese (b), and the moving mechanism is controlled by a control device on the basis of the output of a sensor for detecting the diameter of the cheese (b). Namely, the yarn guide 4 is moved for control so that a balloon, which is formed of the yarn delivered from the cheese (b), at the maximum diameter is always formed. Occurrence of the thread breakage in the case where a weaving machine is operated at 1500m/minute or more of high speed is thereby prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn breakage prevention method, a yarn breakage prevention method and a prevention device for a knitting machine.

FIG. 8 shows an example of a knitting operation. Reference numeral a denotes a spun yarn obtained in the spinning process, which is wound around several spun yarns a to remove slabs, neps and the like, and is rewound into cheese b and corn c. This is the finishing process. After this,
In the case of pre-dyed fabric, move to the dyeing process, cheese b or corn c
To make it easy to dye, rewind it gently (process) and dye. Then, the dyed yarn is rewound firmly (process), and when it is used as the warp of the loom, it is set in the warper. When the weft yarn of the loom is used, the large package P is rewound. In the case of non-dyed loom weft, also as rewinding, 3
Rewind from 5 cheese b or corn c into a large package d (process). The steps of and are the steps of rewinding with a winder, and the balloon generated in this step is
This is a problem because it usually leads to an increase in unraveling resistance and leads to thread breakage. Further, in the knitting and weaving process, the large package P is used as a weft (process).
In this case as well, if balloons are generated when the yarn is fed out, unraveling resistance increases, and problems such as yarn breakage occur.

[0003]

2. Description of the Related Art In an automatic winder, a plurality of winders are arranged in parallel to constitute one automatic winder. FIG. 9 shows an example of a typical conventional winder W. Reference numeral 1 denotes a grooved drum, which gives rotation to the large package P while traversing the yarn y, and the large package P being wound is rotatably supported by a holder 2. 3 is a peg tray on which cheese b and corn c are supported. The yarn y fed from the cheese b or the like is wound around the grooved drum 1 via the yarn guide 4, the tensioner 6, and the slab catch 7, and is wound up as a large package P.

[0004]

[Problems to be Solved by the Invention] In FIG.
Shows the state of the yarn y when the diameter of the cheese b is thick, and (B) shows the state of the yarn b when the diameter of the cheese b becomes small. As shown in FIG. (A), while the cheese b has a large diameter, that is, from the beginning of winding to the middle of winding, balloons are unlikely to occur in the yarn y, but the end of winding when the diameter of cheese b is small, that is, From the time when the remaining thread amount becomes small,
It is known that a balloon in which the yarn y swings in a V-shape is generated between the cheese b and the yarn guide 4, and the number thereof increases.

When balloons are generated in the winder, the following various problems occur. When the balloon is generated, the centrifugal force increases the peptization resistance, and even when you want to rewind it softly, it becomes tightly wound, which causes poor dyeing. If the unraveling resistance increases for the above reasons, the large package becomes uneven in hardness and becomes difficult to use in knitting. This may cause thread breakage. That is, when a balloon is generated, as shown in FIG. 11, the yarn y is fed upward (in the direction of arrow z) while rotating (rotating in the direction of arrow x), and at this time, as shown in FIG. The fluffs of the outer yarn y1 and the inner yarn y2 that are fed out are entangled with each other and rub against each other. Then, the frictional resistance increases due to the rubbing, and when the entanglement becomes severe, the threads are joined together and the threads are cut. The problem of yarn breakage becomes noticeable when the yarn speed is increased, and the yarn breakage easily occurs at a speed of 800 m / min or more.

The problem of thread breakage is the same when a large package is hung on a loom, and in order to avoid rubbing of the thread there, conventionally, the outer circumference is tapered and the thickness is thinned to about 3 inches. I used a large package. However, large packages with a reduced thickness require frequent package replacements,
It is inefficient. Currently, with innovative looms, the yarn speed is 80
Although it is operating at 0 to 1500 m / min, when trying to achieve higher speed, the yarn breaks due to the above-mentioned balloon generation, and the speed cannot be increased.

In view of the above situation, the present invention sets the yarn speed to 1500 m /
An object of the present invention is to provide a yarn breakage prevention method and a yarn breakage prevention device in which yarn breakage does not occur even if the speed is increased more than a minute.

[0008]

According to the yarn breakage prevention method of the present invention, the distance between the supply roll and the yarn guide is made variable so that the diameter of the balloon formed by the yarn delivered from the supply roll is always maximized. It is characterized by controlling.

The yarn breakage prevention apparatus of the present invention comprises a moving mechanism for moving the yarn guide so that the yarn guide can move toward and away from the supply roll, a sensor for directly or indirectly detecting the diameter of the supply roll, and an output value of the sensor. And a controller for driving and controlling the moving mechanism according to the above. In the present specification, the supply roll means a yarn roll on the winding side, and corresponds to cheese or corn in a winder or a large package in a loom.

[0010]

According to the results of earnest research and observation by the present inventor, the occurrence of balloons is correlated with the diameter of the supply roll and the distance between the supply roll and the yarn guide. Then, it tends to occur when the diameter of the supply roll becomes thin, but in this case, the number of balloons increases when the distance between the supply roll and the yarn guide is long, and the number of balloons decreases when the distance is gradually shortened. However, it was found that the balloon would not be generated if the width was widened and shortened further. When the number of balloons is one and the diameter thereof is large, the yarn of the supply roll and the yarn being fed out do not come into contact with each other, so that the yarn breakage caused by the entanglement of the yarns shown in FIGS. 11 to 12 can be eliminated. It was found. The present invention is based on this aspect.

According to the balloon prevention apparatus of the present invention, the diameter of the supply roll is constantly detected by the sensor, and the moving mechanism is driven by the detection signal, so that when the diameter of the supply roll becomes thin, the yarn guide is moved to the supply roll. It is possible to prevent the yarn breakage by keeping the balloon diameter at the maximum all the time by automatically approaching and separating the balloon.

[0012]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a schematic side view of a winder W to which the yarn breakage prevention device of the present invention is applied. 1 is a grooved drum, 2 is a holder, 3 is a tray, 4 is a yarn guide, 6 is a tensioner, and 7 is a slab catch. is there. Although cheese b is shown as the supply roll, it may be corn c.
The yarn y fed from the cheese b is rewound in the large package P while traversing the grooved drum 1 as in the known winder W.

The yarn guide 4 of this embodiment can approach and separate from the cheese b which is a supply roll, and moves up and down as shown in the drawing. As this moving mechanism, any mechanism can be used without particular limitation, and as an example, the mechanism of FIGS. 2 to 3 can be exemplified.

In the moving mechanism 10 of FIG. 2, a screw rod 12 is passed through a nut 11 to which a yarn guide 4 is attached, and this is rotated by a motor 13. When the screw rod 12 is rotated, the nut 11 is guided. It is guided by 14 and goes up and down. motor
As a controller for controlling the rotation of 13, any control device such as a microcomputer can be used.
Further, as the sensor for detecting the diameter of the supply roll of cheese b or the like, any sensor may be used as long as it can be directly or indirectly detected. For example, a sensor for detecting the diameter stepwise by a photoelectric tube or the like, yarn y For example, the amount of feeding can be calculated from the number of rotations of the grooved drum 1 or time.

The approaching pattern of the yarn guide 4 may be such that the approaching operation is continuous in response to the variation in the diameter of the cheese b, and the approaching operation is performed when the diameter set in advance is reached. However, in that case, not only one-step operation but also multi-step operation may be performed. This approach operation may be selected after experimentally confirming the position where the diameter of the balloon is maximum.

FIG. 3 shows a moving mechanism of another example, which is a motor.
An appropriate swing link mechanism 15 is actuated by 13 to swing the yarn guide 4 up and down. In this example, if the swing radius is made sufficiently large, the yarn y can be smoothly guided, and the diameter of the balloon can be maximized to achieve the yarn breakage prevention effect.

FIG. 4 schematically shows the relationship between the diameter of the cheese b which is the supply roll and the distance between the cheese b and the yarn guide 4. In FIG. 4A, the diameter of the cheese b is large. FIG. 3B shows a balloon in which the cheese b has a smaller diameter. Then, according to the diameter of cheese b, cheese b and yarn guide 4
When the distances D and d are properly adjusted, one balloon always has the maximum diameter as shown in the figure, so that the yarn on the cheese b side does not rub and the yarn breakage is prevented.

Next, a yarn breakage preventing device for feeding a yarn from a large package set on a loom will be described. FIG. 5 is a plan view of the yarn breakage preventing device, and FIG. 6 is a rear view of the same.
In the figure, 4 is a yarn guide, which is erected on the upper surface of the base 20 on the tip side. A T-shaped base link 21 is rotatably inserted into the base end side of the base 20, and L-shaped first links 22 and second links 23 are rotatably pin-connected to both ends of the base link 21, respectively. Has been done. And the first
A support peg 24 is attached to the upper ends of the link 22 and the second link 23, so that the two large packages P are supported thereby. An angle restriction link 25 is connected between the first link 22 and the second link 23 and the base 20. A motor 26 for swinging operation is connected to the lower end of the base link 21.

As shown in FIG. 7, when the base link 21 is rotated by the motor 26, the large package P having a reduced diameter can be brought closer to the yarn guide 4. Also in this case, if the motor 26 is controlled by using the sensor 28 for detecting the diameter of the large package P, the sensor 29 for detecting the amount of yarn unwinding, and the controller 27, the distances D, d between the large package P and the yarn guide 4 are controlled. Can be controlled automatically.

The yarn y from one large package P
When all are taken out, the yarn is taken out from the other new large package P, and the empty support peg is set to the next large package in the meantime.

As described above, also in this embodiment, the distance between the yarn guides of the large package P, which is the supply roll set on the loom, can be controlled to be close to and away from each other. It is possible to solve problems such as disconnection.

[0022]

According to the present invention, since the diameter of the balloon is always maintained at the maximum, the problems of uneven winding hardness and yarn breakage are solved. Further, as a result, the yarn feeding speed can be increased, and high performance of the loom can be achieved.

[Brief description of drawings]

FIG. 1 is a mechanism diagram of a winder W to which a yarn breakage prevention device of the present invention is applied.

FIG. 2 is a mechanism diagram showing an example of a moving mechanism used in the yarn breakage preventing device of the invention.

FIG. 3 is a mechanism diagram showing another example of a moving mechanism used in the yarn breakage preventing device of the invention.

FIG. 4 is an explanatory view of the action of keeping the diameter of the balloon at a maximum and preventing yarn breakage.

FIG. 5 is a plan view of a yarn breakage prevention device for a loom.

FIG. 6 is a rear view of the yarn breakage preventing device shown in FIG.

FIG. 7 is an operation explanatory view of the yarn breakage preventing device shown in FIG.

FIG. 8 is a process explanatory view from a finishing process to a weaving process.

FIG. 9 is a perspective view of a conventional winder W.

FIG. 10 is an explanatory diagram showing a balloon generation state in a conventional winder.

FIG. 11 is an explanatory diagram of a cause of thread breakage when a balloon is generated.

FIG. 12 is an explanatory diagram of a cause of thread breakage when a balloon is generated.

[Explanation of symbols]

1 Grooved Drum 2 Holder 4 Yarn Guide 3 Tray 10 Moving Mechanism 21 Base Link 22 1st Link 23 2nd Link 25 Angle Control Link b Cheese c Cone P Large Package y Thread W Winder

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[Procedure amendment]

[Submission date] June 4, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004]

In FIG. 10,
(A) is a state of the yarn y when the diameter of the cheese b is thick,
(B) has shown the state of the thread b when the diameter of the cheese b becomes small. As shown in FIG. (A), between the diameter of the cheese b is thick, i.e. winding metaphase odor from the winding initial
Te is the balloon the yarn y is arising, FIG (B) are shown Qi <br/> diameter smaller since the winding end of's b, from the time when the words residual thread amount becomes small, and cheese b swings the shape of the yarn y is 8 between the yarn guide 4, it is known that the number of balloon increases.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

The problem of thread breakage is the same when a large package is hung on a loom, and in order to avoid any thread rubbing there, conventionally, the outer circumference is tapered and the thread is crushed .
The traverse width has been used a narrow Kushida large package in the order of about 75mm. However, since it must be replaced frequently package is a traverse width in a narrow Kushida large package, but inefficient. At present, the innovative loom is operated at a yarn speed of about 800 to 1500 m / min. However, if an attempt is made to achieve a higher speed, the yarn breakage due to the above-described balloon generation will occur and the speed cannot be increased.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

[0010]

According to the results of earnest research and observation by the present inventor, the occurrence of balloons is correlated with the diameter of the supply roll and the distance between the supply roll and the yarn guide. Then, it tends to occur when the diameter of the supply roll becomes thin, but in this case, the number of balloons increases when the distance between the supply roll and the yarn guide is long, and the number of balloons decreases when the distance is gradually shortened. , The width of the balloon becomes wider, and if it is made shorter , the number of balloons becomes 1
In reduction to Rukoto it has been found. When the number of balloons is one and the diameter is large, the yarn of the supply roll and the yarn being fed out do not contact each other, so that the yarn breakage caused by the entanglement of the yarns shown in FIGS. 11 to 12 can be eliminated. It was found. The present invention is based on this aspect.

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Change

[Correction content]

[Figure 10]

Claims (2)

[Claims] 1. A yarn breakage in a weaving machine characterized in that the distance between the supply roll and the yarn guide is variably controlled so that the diameter of the balloon formed by the yarn delivered from the supply roll is always maximized. Prevention method. 2. A moving mechanism for moving the yarn guide so that the yarn guide can move toward and away from the supply roll, a sensor for directly or indirectly detecting the diameter of the supply roll, and a moving mechanism driven according to an output value of the sensor. A yarn breakage prevention device in a knitting or weaving machine used in the yarn breakage prevention method according to claim 1, comprising a controller for controlling.