JPH09255232A - Package thread end sucking/holding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the pick finding of a package and prevent the failure of piecing by providing a pick finding auxiliary member kept in contact with the thread layer face of the package near a slit in a package thread end sucking/holding device having a suction mouth formed with the slit sucking the thread end of the package. SOLUTION: This package thread end sucking/holding device 2 facing a package 1 is provided with a suction mouth 4 opened with an oblong slit 5 in parallel with the axis X direction of the package 1 at the tip. A pick finding auxiliary member 6 is arranged on the opposite side to the forward rotating direction of the package near the slit 5. When the suction mouth 4 is lowered and the package 1 is inverted, the auxiliary member 6 rubs the surface layer face, a thread end reaches the contact section between the package 1 and the auxiliary member 6, and the thread end is made easy to pick up and extract. The thread end reaching the position of the slit 5 after the package 1 is rotated about 360 deg. is sucked and held by the suction mouth 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package yarn end suction holding device for a yarn winding machine.

[0002]

2. Description of the Related Art When a yarn spun by a spinning machine or a yarn wound around a wood pipe is wound into a package, a yarn splicing device is provided to cope with yarn breakage that occurs during winding. ing. The yarn splicing device is provided with a package yarn end suction device that pulls out the package side yarn end and the delivery side yarn end and pulls it into a knotter or the like. When a yarn breakage occurs, the package yarn end suction device holds the package yarn end. After sucking into the suction mouth, the package yarn end suction-holding device turns to guide the yarn end to the knotter. At this time, the package rotates in the direction opposite to that during winding, making it easy to pull out the yarn wound on the package.

[0003]

However, in the conventional package yarn end suction holding device as described above, when the yarn end of the package is dispensed, the suction mouth does not spread the yarn end and performs the yarn splicing operation as it is. There was a problem that splicing failed. The failure of the yarn feeding is one of the failure factors at the time of yarn splicing in the spinning machine, and the number of failures accounted for 40% of the total number of failures of yarn splicing. Further, when the yarn unwound from the package is caught on the slab or is laid under another yarn as shown in FIG. 4, the suction force of the suction mouth of the package yarn end suction holding device causes the yarn to be pulled. There is also a problem that the yarn cannot be unwound from the package, and conversely, the yarn sucked by the suction mouth is pulled out from the suction mouth as the package yarn end suction holding device turns.

SUMMARY OF THE INVENTION An object of the present invention is to provide a package yarn end suction / holding device which solves the above-mentioned drawbacks of the prior art, can surely expose the package, and can avoid failure of yarn splicing.

[0005]

In order to achieve the above-mentioned object, the present invention provides a package yarn end provided with a suction mouth which is formed with a slit facing the yarn layer surface of the package and parallel to the axial direction of the package. In the suction holding device, a lead-out assisting member that comes into contact with the yarn layer surface of the package is provided in the vicinity of the slit on the opposite side of the package winding direction. Moreover, the protrusion assisting member is a rubber-like plate member. Further, the protrusion assisting member has abrasion resistance and has a predetermined coefficient of dynamic friction. Alternatively, the coefficient of dynamic friction is 0.7 to 0.8.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a side view including a partial cross section showing a package yarn end suction device, FIG. 2 is a view taken in the direction of arrow a in FIG. 1, FIG. 3 is an enlarged view showing the suction portion of FIG. 1, and FIG. It is the schematic which shows the example of the state which is not performed.

First, the main structure of the package yarn end suction device will be described. Reference numeral 1 denotes a package, which is supported by a support member (not shown), draws the yarn Y from a spinning device of an air spinning machine, a wood tube or the like and rotates in the direction of arrow A to form a yarn layer. Reference numeral 2 denotes a package yarn end suction holding device which is provided opposite to the package 1, is supported so as to be rotatable around a shaft 3 as a fulcrum, has a cylindrical shape, is connected to an unillustrated intake device, and is provided with a suction mouth 4 at its tip. ing. The suction mouth 4 has a horizontally elongated slit 5 opened in parallel with the direction of the axis X of the package 1. The slit 5 has a length equal to the width of the yarn layer surface of the package.

In the vicinity of the slit 5 and in the package 1
The lead-out assisting member 6 is provided on the side opposite to the normal rotation direction (arrow A, the rotation direction when forming the yarn layer). The lead-out assisting member 6 is attached by being sandwiched between an L-shaped member 7 and a member 8 which are fixed to the package yarn end suction holding device 2 by welding or the like. The member 8, the lead-out assisting member, and the L-shaped member are fixed by screws 9 and nuts 10. The screws 9 and the nuts 10 are provided at four places. The screw 9 and the nut 10 may be provided at any number as long as the lead-out assisting member 6 is sufficiently fixed. The lead-out assisting member 6 is provided at a position where its tip portion abuts on the yarn layer surface of the package 1 during the suction operation and bends. The protrusion assisting member 6 has the slit 5
Similarly, the length of the yarn layer surface width of the package 1 is the same. The L-shaped member 7 and the member 8 have the same length as the lead-out assisting member 6. The lead-out assisting member 6 is in contact with the surface of the yarn layer of the package 1 with a predetermined stress due to the amount of deflection. The lead-out assisting member 6 is in contact with the end-side surface of the lead-out assisting member 6 over the entire width of the yarn layer surface of the package 1. It is abutted with a predetermined stress that maximizes the wear resistance and the ejection performance described later.

Next, the operation of the package yarn end suction holding device will be described. Now, it is assumed that yarn joining is performed by yarn cutting or the like. In order to pull out the yarn end of the yarn splicing from the package 1, the package 1 is rotated in the direction opposite to the arrow A in FIG. 1, the yarn end suction holding device 2 is swung from the standby position shown by the chain double-dashed line, and the suction mouth is moved. Package 4
, The yarn end of the yarn layer surface of the package 1 is unwound by the suction action of the suction mouth 4, and the slit 5
Is sucked into the yarn end suction holding device 2. Here, if there is no problem in forming the yarn layer of the package 1, as the package 1 rotates in the reverse direction, the yarn end is also sucked and held as shown by the yarn Ya.

However, if there is a problem such that the yarn end bites into the yarn layer surface of the package 1 or the like, there is a case in which the sucking force alone does not cause the yarn to be drawn out. Further, there is a problem in forming the yarn layer of the package 1, and for example, when the yarn end is in a state where it cannot be unraveled as shown in FIG. 4, the yarn end is temporarily sucked into the suction mouth 4, but When the trouble portion T is separated from the position of the suction mouth 4 by the reverse rotation of 1, the yarn end once sucked into the suction mouth 4 is also pulled out by the reverse rotation of the package and becomes the state of the yarn Ya shown in FIG. Alternatively, there may be a problem in forming the yarn layer of the package 1, and for example, the yarn end may not be unraveled as shown in FIG. Then, the yarn end is once sucked into the suction mouth 4, but when the trouble part T is separated from the position of the suction mouth 4 by the reverse rotation of the package 1, the yarn is once sucked into the suction mouth 4. The end is also pulled out by the reverse rotation of the package, and becomes the state of the yarn Yb shown in FIG. So-called
Reverse winding occurs. Then, the yarn end comes out of the suction mouth 4.

However, since the lead-out assisting member 6 is configured as described above, the suction mouth 4 descends and the lead-out assisting member 6 is moved to the front side of the package 1 when the package 1 is reversed (in the direction opposite to the arrow A). When the yarn end reaches the contact portion between the package 1 and the ejection assisting member 6 by rubbing the layer surface, the yarn end is triggered and the yarn end is easily ejected. Then, when the yarn end reaches the position of the slit 5 after making about one rotation, the yarn end is sucked and held by the suction mouth 4. Alternatively, even if the sucked yarn is in the Yb state due to the above-mentioned problem in forming the yarn layer, when the trouble portion T reaches the contact portion between the package 1 and the ejection assisting member 6, the yarn layer surface of the package 1 is Tangles and the like in are corrected. Then, the yarn Yb is dissociated from the yarn layer surface and enters the normal state shown by the yarn Ya.

Next, the reduction of the extraction failure rate and the material by the extraction auxiliary member of the present invention will be described.

[0013]

[Table 1] (N = 120) * Failure output rate = (Number of failed output / Number of yarn splicing n) × 100

[0014]

[Table 2]

[0015] Table 1 above shows the failure rates of the present invention and the conventional method. By the protrusion assisting member of the present invention,
Compared with the past, the failure rate of getting out is reduced by about 40%.

Table 2 above shows a comparison of the lead-out failure rate, the coefficient of kinetic friction (against PC yarn), and the abradability according to the material of the lead-out assistance member. NBR is acrylonitrile butadiene rubber and EPT is ethylene propylene trimer rubber.

As shown in Table 2, the EPT has a large dynamic friction coefficient and a low lead-out failure rate. But,
The wear is severe, the surface of the package is damaged, the surface is fluffed, and so-called winding of the above-mentioned yarn Yb occurs frequently. After all, the failure rate of yarn splicing increases, which has the opposite effect. NBR
In (1), the wear resistance is small and the package surface is not damaged. However, the coefficient of kinetic friction is low, the failure rate of the lead-out is high, and the state is the same as when the lead-out assisting member is not used.
NBR (2) is also sticky, has an appropriate coefficient of dynamic friction, and has a low failure rate of ejection. Moreover, the wear property is moderate, and there is no problem such as damage to the package surface. As described above, NBR (2) is a suitable material for the lead-out assisting member. The dynamic wear retention is 0.7 to 0.
The thing of about 8 is the most preferable.

In the above-mentioned embodiment, the lead-out assisting member is a rubber-like plate member, but a brush-like member is also applicable as long as it has the same dynamic friction coefficient and wear resistance. Is.

[0019]

As described above, according to the present invention, when the yarn is cut, the yarn end wound in the package is difficult to be pulled out due to some obstacle, and even if it is difficult to take out the yarn, the reverse rotation of the package , The lead-out assisting member 6 rubs the surface layer surface of the package 1, and the yarn end is the package 1 and the lead-out assisting member 6
When it reaches the contact portion, the yarn end is triggered and the yarn end becomes easy to come out. Then, the yarn ejection is surely performed, and the yarn end can be reliably guided to the yarn splicing device. Even if the sucked yarn is caught on the surface layer of the package due to a problem in forming the yarn layer, if the troubled portion reaches the contact portion with the lead-out assisting member, the entanglement on the yarn layer surface is corrected and the normal state is achieved. Can be returned to. Then, failure of yarn splicing can be eliminated and the machine base operating rate can be increased.

[Brief description of drawings]

FIG. 1 is a side view including a partial cross section showing a package yarn end suction device according to an embodiment of the present invention.

FIG. 2 is a view on arrow a of FIG.

FIG. 3 is an enlarged view showing a suction unit of FIG.

FIG. 4 is a schematic view showing an example of a state in which a yarn end is not unwound.

[Explanation of symbols]

 1 Package 2 Package Thread End Suction and Holding Device 4 Suction Mouse 5 Slit 6 Feeding Aid Member

Claims (4)

[Claims] 1. A package yarn end suction holding device comprising a suction mouth formed with a slit for sucking the yarn end of a package, wherein a feeding assisting member for contacting the yarn layer surface of the package is provided in the vicinity of the slit. A package yarn end suction holding device in a characteristic yarn winding machine. 2. The package yarn end suction holding device according to claim 1, wherein the lead-out assisting member is a rubber-like plate member. 3. The package yarn end suction holding device according to claim 1, wherein the lead-out assisting member has wear resistance and has a predetermined dynamic friction coefficient. 4. The package yarn end suction holding device according to claim 3, wherein the dynamic friction coefficient is 0.7 to 0.8.