JP2003012231A - Device for assisting in capturing thread end for automatic thread winding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device enhancing the efficiency of production by reducing the rate at which joining of threads fails, thereby preventing a decrease in working efficiency, particularly when a woolen thread or a hemp thread or the like with large diameters and high rigidity is used in the thread ending device of an automatic thread winding machine. SOLUTION: In the device for assisting in capturing the end of a thread for the automatic thread ending mechanism of the automatic thread winding machine, a blowing air nozzle is provided on the upper surface of a suction mouth. The nozzle is provided with a slit which continues throughout the width of a package. The device is provided with an air blowing means for floating the end of the thread from the package by blowing air from the slit from the direction opposite to rotation of the package at the time when the package is reversed.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to a technical field for catching a yarn end of a yarn end of a package in a piecing apparatus of an automatic winding machine in spinning. [0002] A conventional automatic yarn splicing mechanism of an automatic winding machine is
The end of the yarn that is wound up on the package is sucked by the air with a suction mouse, but it may not be captured in the fluffy state of the fiber.・ The contact state on the package surface differs depending on the crimped / straight type, and the characteristics of the single fiber itself are hard ・ soft ・
The contact state on the package surface differs depending on the magnitude of the torsional torque, and the contact surface between the package and the end of the yarn depends on the surface, line, point, The end of the yarn is entangled with the bite and the complicated state, especially long fibers such as hemp fiber are easily entangled with other yarns, and the yarn end at the yarn end is reliably peeled off from the package surface and sucked into the suction mouth and gripped It was difficult. [0003] As described above, in the automatic winding machine that connects the yarn end picked up from the lower spun tube yarn and the yarn end taken out from the package, after a certain repetitive operation, the yarn end cannot be captured. Normally, a yellow signal indicating unsuccessful capture is issued, the machine stops at the winding machine location, and the operation is restored by manual correction work. In the case of a thick and highly rigid woolen yarn or hemp yarn, piecing fails. There were many problems, such as a large decrease in work efficiency and the need for extra units. In order to increase the success rate of taking out the yarn end between the suction mouth and the package, as a countermeasure, adjustment of the contact surface gauge between the suction mouth and the package and attachment of a friction material to the suction mouth contact surface to prevent a sting. Although measures have been taken to control the method and control of the suction air, there are problems with the unevenness of the package surface and between the mouse and the deterioration of the quality of the product due to friction material (abrasion, occurrence of neps), etc. It has been difficult to reliably remove complicated yarn ends together with materials having various physical properties. For this reason, a means has been proposed in which, when the package is rotated in the reverse direction, air is sprayed with an air nozzle in a tangential direction of the surface of the package from a direction opposite to the rotation direction to peel off the yarn end. [0005] By the way, in the above-mentioned prior art yarn end tapping method, a plurality of nozzle holes are arranged, and the blowing pressure of the entire width of the package is uneven, and
In particular, in order to operate the air outlet from the nozzle intermittently to avoid interference with the suction mouse,
It was not always appropriate for entanglement of thick and large stiffness yarn or hemp yarn, and the probability of splicing failure was high. The present invention is intended to solve the above-described problems, and reduces the unsuccessful rate of piecing in a piecing apparatus of an automatic winding machine, particularly, even when used for a thick and rigid woolen yarn or hemp yarn. Another object of the present invention is to provide a device that prevents a decrease in work efficiency and improves production efficiency. SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an auxiliary device for catching a yarn end of an automatic yarn splicing mechanism of an automatic winding machine, which blows out to an upper surface of a suction mouth. An air nozzle is provided, and the blowing air nozzle is provided with a continuous slit over the entire width of the package, and at the timing of reversing the package, air is blown out from the slit in a direction opposite to the rotation of the package to float the yarn end from the package in advance. A yarn catching assist device of an automatic winding machine, characterized in that such an air blowing means is provided. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an entire single part of an automatic winding machine composed of a plurality of units, and a bobbin thread pulled out from a bobbin 1 in an operating state of an automatic yarn winding machine which is a final step of ordinary spinning. A is guided from the slab catcher 2 to the splicer 3, and is wound as a package 5 while being traversed by driving the traverse drum 4. Here, if the lower thread A has a defect such as a thick thread, a thin thread, a slab, or a nep, the defect is cut by the slab catcher 2 at the same time as the defect is detected by the lower thread A, and the splicer 3 reconnects the defect. Pack into a continuous cone or cheese with the lower thread. In the splicing by the splicer 3, the end of the lower thread A from which a defective portion such as a slab, which is a defective portion, is cut is once wound around a package 5, and thereafter the traverse drum 4 stops. After the traverse drum 4 is stopped, a suction mouth 6 having an absorption nozzle over the entire width of the package 5 is moved to an arrow B.
2 and approaches the package 5 by about 4 to 5 mm to reach the state shown by the solid line in FIG. 2, and then the drum 4 rotates in the reverse direction to rewind the package 5 itself (arrow F). At the same time, an air nozzle 8 having a slit 81 continuous at the upper end of the suction mouth 6 over the entire width of the package.
The air is blown out in the direction opposite to the rotation (reverse rotation) of the package 5, the cut yarn end is floated in advance from the package 5, and the yarn mouth (yarn end) floating and separated from the package 5 is absorbed and captured by the suction mouth 6. . On the other hand, the splicing pipe 7 rotates in the downward direction of the arrow C in FIG. 1 to be in the state of the solid line in FIG. 2, and the lower thread A is sucked and gripped by the splicing pipe 7 from the yarn tip.
As described above, when the end and the starting end of the lower thread A are captured and gripped by the suction mouth 6 and the relay pipe 7, respectively, the suction mouth 6 turns in the direction of arrow D in FIG. The lower and upper bobbin thread A is drawn into the splicer 3, and the end of the thread grasped by the suction mouth 6 and the starting end of the thread grasped by the splicer 3 are untwisted and combined and twisted to form a yarn. Is spliced.
After completion of the piecing, the excess yarn is cut and sucked by an air into an air duct (not shown) to be removed. Here, when a piecing error occurs, the piecing operation is performed as described above. However, if the piecing is not performed even after repeating the same operation three times, the automatic winding machine emits a yellow button signal 10 and emits the yellow button signal 10 as it is. The machine remains stopped automatically, and the abnormal stop state due to the yellow button signal 10 means that the yarn end is manually pulled out from the package 5
The operation is restarted by resetting the yellow button 10a. As shown in FIGS. 3 and 4, the air nozzle 8 is made of lightweight PVC which is easy to carry out precision machining.
The inner surface of the nozzle on the side where the air is supplied from the L-shaped resin plug 83 is φ5.9 mm × 15 mml so that the m slit 81 (length 100 mm) and the air volume and speed are uniform like an air curtain
(part a), φ5.5mm × 15
mml (b part), φ3mm x 20mml (c part) φ2mm x 80mml (d part)
The air nozzle 8 is fixed to the upper end of the suction mouth 6 with a stopper 82 so that the blowing angle and the gap with the package 5 can be adjusted. The blown air is supplied by an air solenoid valve 85 (1/4 ", orifice 3 mm, DC 24 V) through an L-shaped resin plug 83 and a soft φ6 mm vinyl hose 84. [0010] FIG. As shown in the figure, the outline of the suction and the blowing of the air between the package 5, the suction mouth 6, and the blowing air nozzle 8 is generally as follows. At the same time, the package 5 rotates slowly in reverse (arrow F).
Then, as shown in FIG. 5 (b), the closest approach distance is adjusted to about 4 to 5 mm as shown by the symbol e in the figure, so that it is very close to the package 5 and becomes an enlarged view of FIG. 5 (c). As shown, high-pressure air (1.5 to 5.0) is applied to the yarn end G in close contact with the package 5.
kg / cm ² ) to release the yarn end G from the package 5 and release it. The released yarn end G is sucked by the suction mouth 6. However, when the package 5, the suction mouth 6 and the blowout air nozzle 8 are in close proximity, the air nozzle 8 From the surface of the package 5 by operating the air blown from the direction opposite to the reverse rotation direction F of the package 5 (arrow H) to float the yarn end G from the surface of the package 5. 6 sucked (arrow J). At this time, the suction force of the suction mouth 6 near the yarn end G is smaller than that of the air nozzle 8, so that it becomes a U-shaped vortex as shown in FIG. The suction mouse 6 sucks and holds G. [0011] Since the cut end of the yarn becomes free of twisting torque by spinning, in particular, in the case of hemp yarn, there are cases where the end is entangled with the fluff and it is more difficult to peel off the yarn end, and the end of the yarn end is thin and elongated. In this case, it is very difficult to peel off because of the parallel twisted shape on the package 5. Therefore, at the time of reverse rotation by the blowing air nozzle 8, the package 5
Timely continuous high-pressure air blowing on the surface, and
Spraying of the high-pressure air continuously over the entire width of the surface of the package 5 is extremely effective since the peeling action at the end of the yarn end is reliable. Next, in the timing of the above-described air blowing operation, the lever of the micro switch 91 is brought into contact with the main body cam 9 in FIGS.
4 ", Oririfisu 3 mm, DC 24V) is actuated, and utilizing the compressed air 6~10kg / cm ² on the primary side of Eya source, air pressure reducing valve
The pressure is reduced to 86 (3/4 ", 1.5 to 4.0 kg / cm ² ), branched as secondary air to each drum and supplied in parallel, and the operation related to other suction mouths and the like is performed by the cam lever 92. The relationship between the main body cam 9 and the timing of the piecing operation will be described with reference to Fig. 6 and Fig. 7. First, the slab catcher 2 detects a defect such as a slab of the lower thread A and detects the defect. When cut, the body cam 9 starts rotating,
When the main body cam 9 rotates 10 degrees, the drum brake (not shown) of the traverse drum 4 is braked to 88 degrees, and then the suction mouth 6 is turned to the operating position to gradually start suction from 30 degrees. The air nozzle 8 starts spraying air in the tangential direction of the surface of the package 5 from 93 degrees when the suction mouth 6 approaches the package 5, and operates the reversing roll (not shown) of the package 5 at 98 degrees at almost the same time to reverse the rotation. Start.
In this way, the yarn end is released and peeled off, and the suction mouth 6 is gripped by the suction mouth 6, but the suction force of the suction mouth 6 is slightly reduced between 128 degrees and 155 degrees. This is to change the wind force or the wind direction formed by the air nozzle 8 and the suction mouth 6 in the middle to ensure the yarn end releasing operation.
Also ends at 186 degrees, gradually decreases from 185 degrees of suction of the suction mouth 6, the operation of the reversing roll (not shown) is stopped at 222 degrees, and the suction of the suction mouth 6 also stops at 2 degrees.
The processing ends at 30 degrees, and the drum brake (not shown) of the traverse drum 4 is braked again from 226 degrees to 270 degrees. The time required during this time is about 7 seconds, and the main body cam 9 rotates 360 times.
Approximately 9 seconds to complete the yarn end gripping,
When the piecing operation is completed, the operation returns to the normal operation. [Operation] The results of an experiment performed according to the embodiment of the present invention with the above configuration will be described. The apparatus of the present embodiment is a piecing apparatus of an automatic winding machine, Murata Machinery Co., Ltd. No. 7-I
Attached to the I-link corner, polyester 65 as lower thread
% Yarn and 35% hemp yarn were used to measure the degree of piecing failure. The degree of unsuccessful piecing was measured as the number of unsuccessful times relative to the number of successful piecings, which was compared with the number of successful piecings by emitting the yellow signal 10 and the number of times the yellow button 10a was operated as the number of unsuccessful times. As shown in the following formula, the unsuccess rate (%) (miss notting) = (yellow button operation count / successful splicing count) x 100 is calculated as the unsuccess rate. And the work efficiency (kg / h) before and after the installation of the device of this embodiment
Table 1 in FIG. 8 shows the total of the usage results for six months. Table 2 in FIG. 9 shows that the hemp (ramie 100%) pure yarn was similarly used as the lower yarn under the same assumption. Table 1 of 65% polyester and 35% hemp blend yarn
When using 30 cts (cotton count), the piecing unsuccessful rate is halved from 6.0% to 3.0%, and when using 40 cts (cotton count) of blended yarn, it is almost halved from 5.8% to 3.2%. Efficiency is 30 cts (cotton count) of mixed yarn
Dramatically improved from 9.9Kg / hr to 11.5Kg / hr, blended 40ct
In s (cotton count), the volume has improved dramatically from 8.0 kg / hour to 9.5 kg / hour. In addition, the hemp (ramie 100%) pure yarn shown in Table 2 is 60's
When using (hemp count), the piecing failure rate is
It drastically decreased from 9.0% to 5.9%. Even when using 80's (hemp count), it drastically decreased from 8.4% to 5.2%, and similarly 100's
Even when (hemp count) is used, it is drastically reduced from 9.2% to 6.1%, the work efficiency is 60's (hemp count), and the work volume is remarkably improved from 12.1Kg / hour to 13.5Kg / hour, and 80's (hemp count) The volume increased dramatically from 9.8 kg / hour to 10.7 kg / hour, and the volume improved significantly from 6.5 kg / hour to 7.0 kg / hour at 100's (hemp count). In this way, especially like hemp yarn or hemp blend yarn,
Conventionally, when used for thick and rigid woolen yarn or hemp yarn, the unsuccessful rate of piecing was large and the work efficiency was reduced. The drastic decrease in work efficiency has been greatly improved, and as a result, the production efficiency can be improved. It is needless to say that the present invention is not limited to the above embodiment unless the characteristics of the present invention are impaired. For example, the present embodiment is not limited to the dimensions of the air nozzle 8 and the configuration of the accessory parts thereof, and the design can be appropriately changed as long as it is effective for peeling off the yarn end on the package surface. As described above, according to the above configuration of the present invention, in the automatic winding machine, air continuous in the width direction like an air curtain is blown in the tangential direction on the package surface. Even when used for thick and rigid woolen or hemp yarns, the failure rate of piecing is drastically reduced,
The working efficiency is remarkably improved, and as a result, the effect that the production efficiency can be improved can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of a single part of an embodiment of the present invention in a normal operation in an automatic winding machine composed of a plurality of units. FIG. 2 is a yarn in FIG. FIG. 3 is a schematic cross-sectional view illustrating a main part of one embodiment of the present invention; FIG. 4 is a front view showing a state of a slit of an air nozzle in FIG. 3; FIG. FIG. 6 is a cross-sectional view showing the relationship between the operation of the suction nozzle 6, the suction mouth 6, and the air nozzle 8. FIG. 6 is an explanatory view for explaining the operation of the cam body in the embodiment. FIG. 8 is a timing chart shown. FIG. 8 is a table showing the experimental results obtained by using the examples in a blend yarn of 65% polyester and 35% hemp. FIG. 9 is the experimental results obtained by using the examples in hemp pure yarn. Figure of Table 2 in which [Table Description] Thread 1: bobbin, 2: slab catcher, 3: splicer, 4: traverse drum 5: package, 6: suction mouth, 7: relay pipe, 8: air nozzle, 81: slit, 82: stopper, 83: L-type Resin plug, 84: Vinyl hose, 85: Air solenoid valve, 86: Air pressure reducing valve, 9: Cam body, 91: Micro switch, 92: Cam lever, 10: Yellow signal, 10a ...
Yellow traffic light button

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Shinji Nakaoki             3-10-1, Jomachi, Mihara-shi, Hiroshima Tosco             Mihara Factory Co., Ltd. F term (reference) 3F112 JA03 JA08 JB02                 4L056 AA45 CB04 CB07 CB25

Claims (1)

Claims: 1. An auxiliary device for catching a yarn end of an automatic yarn splicing mechanism of an automatic winding machine, wherein an air outlet nozzle is provided on an upper surface of a suction mouth, and the air outlet nozzle has a full width of a package. A continuous slit is provided over
A yarn mouth catching assisting device for an automatic winding machine, characterized in that an air blowing means is provided for blowing air from the slit at a timing opposite to the rotation of the package at the timing of reversing the package and for previously floating the yarn end from the package.