JP2001055637A - Spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spinning machine designed to prevent a yarn from adhering to relevant devices and respective members around the yarn traveling path as a result of generating static electricity on the yarn and through the resulting electrostatic force due to the decrease in yarn tension to ensure a piecing operation to be conducted without occurrence of yarn fluctuations, slacks or kinks. SOLUTION: This spinning machine is such that there are arranged a spinning device 3 for twisting a sliver S by subjecting it to swirling air jet to form a yarn, a slack tube 7 for absorbing a yarn Y's slack in its piecing operation, and a winder 9 for winding a spun yarn Y, along the yarn traveling direction; wherein a static eliminator is furnished between the spinning device 3 and the slack tube 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning device for twisting a yarn, a suction means for absorbing the slack of the yarn at the time of splicing, and a winding device for winding the spun yarn along the yarn traveling direction. Related to spinning machines.

[0002]

2. Description of the Related Art Conventionally, in a spinning machine of this kind, a drafting device for stretching and thinning a fiber bundle (sliver), a spinning device for twisting, a yarn joining device for performing splicing at the time of splicing,
Having a winding device for winding the generated spun yarn, and after drafting the sliver by a draft device, twisting is performed in a pneumatic spinning device by applying a swirling airflow by compressed air injection in an air spinning nozzle. Thus, a spun yarn is obtained, and the spun yarn is taken up by a take-up device through the travel of a delivery roller. A suction means is provided between the delivery roller and the winding device, and the suction means absorbs slack of the yarn at the time of splicing.

When a spun yarn made of 100% polyester or the like is produced by the spinning machine, static electricity is easily generated in the spun yarn generated by friction between the sliver, the draft device and the spinning device when the sliver runs. However, the material of each member that contacts the yarn between the spinning device and the suction means is, for example,
Since it is made of a low-conductive material such as ceramic and phenol resin, it is difficult for the electric charge charged to the yarn to be led out to the outside through each of the members, whereby the yarn is in a state where it is easily adsorbed to each of the members. , Normal thread running may be hindered.

[0004]

When piecing is performed, the yarn is spun in the upstream spinning device in the same manner as during normal yarn traveling, but at the piecing point, the yarn traveling is stopped for a moment and the winding is performed. Since the yarn is spliced with the yarn on the take-off side, the yarn tension is reduced between the yarn feeding means and the yarn splicing portion during the splicing in the above-described state. Since air is always sucked at the inlet of the suction means, a reduced amount of the yarn tension is sucked from the inlet of the suction means to keep the yarn tension large. However, with the recent increase in the speed of yarn production, as the yarn traveling speed increases, the length of the yarn spun while the yarn traveling is stopped at the time of piecing becomes longer, and the decrease in the tension generated at the time of piecing becomes smaller. growing. As the yarn tension decreases, the yarn adheres to each member that comes into contact with the yarn between the spinning device and the suction means by electrostatic force, whereby the yarn sways, slacks, or twists before being wound by the winding device. Has occurred, which has a problem that the quality of the product is greatly affected.

The present invention has been made in view of the above problems, and removes static electricity of a yarn generated by running a sliver between a spinning device of a spinning machine and a periphery of an inlet of a suction means, and the yarn adheres to each member. The purpose of the present invention is to prevent the yarn from wobbling, loosening, or twisting at the time of splicing.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, static electricity removing means is provided between a spinning device and a suction means for absorbing a slack of a yarn during splicing. I have to do that. Then, static electricity generated by friction between the sliver and each device of the spinning machine is removed by static electricity removing means. Therefore, at the time of piecing, it is possible to prevent the yarn from wobbling, loosening, or stiffness that occurs when the yarn, the devices, and the members around the yarn traveling portion are attached by electrostatic force due to a decrease in the yarn tension.

According to a second aspect of the present invention, both the surfaces of the pair of rollers constituting the yarn feeding means are formed of a highly conductive material, and the rollers include a grounded surface. By using a highly conductive material for the roller, static electricity generated in the yarn passes through the surface portion of the roller and is then led out in a grounded direction. In addition, it is possible to prevent the yarn from wobbling, loosening, or swelling at the time of splicing, which occurs when the yarn, the device, and each member around the yarn traveling portion adhere to each other by electrostatic force due to a decrease in the yarn tension.

According to a third aspect of the present invention, the periphery of the inlet of the suction means is formed of a highly conductive material, and the periphery of the entrance of the suction means includes a grounded one.
In the present invention, since the static electricity generated in the yarn by using a highly conductive material around the entrance of the suction means passes through the surface portion of the periphery of the entrance of the suction means, it is led out in the grounded direction. The static electricity removed is removed, and it is possible to prevent the yarn from swaying, loosening, or twisting at the time of piecing, which occurs when the yarn, the device, and each member around the yarn traveling portion are attached by electrostatic force due to a decrease in the yarn tension. .

According to a fourth aspect of the present invention, a guide rod for bending a yarn path is formed of a highly conductive material, and the guide rod includes a grounded rod. After the static electricity generated in the yarn by using a highly conductive material for the guide rod passes through the surface of the guide rod,
Since it is led out in the direction in which it is grounded, the generated static electricity is removed, and the yarn and the device and the members around the yarn running portion are attached by electrostatic force due to a decrease in the yarn tension. It is possible to prevent the occurrence of loosening or chatter.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to the embodiments unless it departs from the gist of the present invention.

The spinning machine of this embodiment has a number of spinning units as shown in FIG. 1 arranged side by side. A yarn splicing carriage 20 having a yarn splicing device 23 is provided between these spinning units.
Are provided so that they can run freely.

FIG. 1 is a perspective view showing one of a number of spinning units arranged side by side in the spinning machine. The spinning unit includes a draft device 2, a spinning device 3 on the downstream side of the draft device 2, and a yarn feeding means (a yarn nip between the delivery roller 4 and the Nippler 4 a) on the downstream side of the spinning device 3. Downstream), the yarn guide bar 5 downstream of the yarn feeding means, the slack tube 7 downstream of the yarn guide bar 5, the yarn clearer 8 and the yarn clearer downstream of the slack tube 7. A winding device 9 is provided on the downstream side of 8. In addition, as shown in FIG.
0 is provided with a knotter 23, a spinning-side yarn end suction / capture means (suction pipe) 21, and a winding-side yarn end suction / capture means (suction mouth) 22.

The draft device 2 is provided with respective rollers having different peripheral speeds in order to extend the sliver S to make it thinner.
The spinning device 3 applies a swirling airflow to the sliver S to generate a twisted yarn Y, the yarn feeding means sends the generated spun yarn Y to the downstream side, and the yarn guide bar 5 bends the yarn Y, and the yarn Y is bent. It is for changing the way. Finally, the winding of the spun yarn Y is performed by the winding device 9. or,
The yarn clearer 8 detects an abnormal portion of the yarn Y when an abnormal portion of the yarn Y occurs. At the time of splicing, the slack tube 7 is suction means for absorbing slack of the yarn Y, and the yarn end suction suction means (suction pipe) 21 in the splicing carriage 20 is a yarn discharged from the spinning device 23. While sucking the end, the winding-side yarn end suction / capturing means (suction mouth) 22 sucks the yarn end from the package P rotatably supported by the winding device 9, and each of the knotters 23 is a yarn joining device. It is to guide to.

In this spinning machine, a guide rod 5 located on the surface of both the Nippler 4a and the delivery roller 4 constituting the yarn feeding means, a downstream side of the yarn feeding means in the yarn traveling direction, and a downstream side of the guide rod 5 Suction means (slack tube)
B) The surface around the entrance 7a of the unit 7 is provided with static electricity removing means formed of a highly conductive material. The nipper roller 4a and the delivery roller 4 are arranged as a yarn feeding means with their rotation axes parallel to each other and in a state where their surfaces are in contact with each other, and the yarn Y is sent out by rotating the abutting surface through the yarn.

In addition to the static electricity removing means, as shown in FIGS. 1 and 2, the yarn feeding means and the suction means inlet peripheral portion 7a
A static electricity removing brush 10 made of the same material as the surfaces of both the Nip roller 4a and the delivery roller 4, the guide rod 5, and the surface of the inlet peripheral portion 7a of the suction means 7 is provided between them. When the static electricity removing brush 10 is provided,
In order to prevent the running yarn Y from deteriorating due to friction with the static electricity removing brush 10, it is desirable that the running yarn Y be provided with a slight gap ΔX (about 5 mm) as shown in FIG. In this case, the static electricity generated in the yarn Y is removed by corona discharge to the static electricity removing brush 10.

In the spinning machine according to the present invention, both surfaces of the nipple roller 4a and the delivery roller 4 constituting the static electricity removing means, the guide rod 5, the inlet peripheral portion 7a of the suction means (slack tube) 7, and the static electricity removing brush. Numeral 10 is made of a resin containing a highly conductive material such as metal, carbon or metal powder, and all of these members are grounded through appropriate members such as a machine frame as shown in FIG. Grounded).

Next, the operation of the spinning machine will be described based on an embodiment.

After the sliver S is aligned by the trumpet guide 1, the sliver S is drafted by the draft device 2, twisted by the spinning device 3, sent out to the downstream side as the spun yarn Y by the delivery roller 4, and bent in the yarn path. It is bent by a guide rod 5 for winding and wound up as a package P by a winding device 9.

A yarn splicing carriage 20 is provided between the yarn clearer 8 and the winding device 9 so as to be movable in the direction in which the spinning units are juxtaposed (in FIG. 2, on the front and back of the paper). When the clearer 8 detects the yarn defect and cuts the yarn Y, the yarn splicing carriage 20 travels to the position of the weight, and then is moved by the suction pipe 21 and the suction mouth 22 to the upper and lower yarn ends (the yarn end on the spinning side and the winding end). The yarn end on the take-up side is captured, and both ends thereof are guided to a knotter (yarn splicing device) 23 to be spliced.

At the time of piecing, the yarn is momentarily clamped by a clamping device (not shown) in the piecing device 23. During this time, the yarn Y is continuously sent from the draft device 2 and the spinning device 3 (air spinning nozzle) to the downstream side. . The slack of the yarn Y on the downstream side of the yarn feeding means caused by the decrease of the yarn tension due to this extends along the direction in which the spinning units are arranged,
A slack tube 7 connected to a suction duct 6 connected to a suction source (not shown) is sucked and absorbed as indicated by Y '(two-dot chain line). When the winding by the winding device 9 is restarted after the completion of the piecing, the slack Y 'sucked and stored by the slack tube 7 is pulled out and returned to the normal winding operation.

After the sliver S is drafted by the drafting device 2, the spun yarn Y produced by twisting in the spinning nozzle of the spinning device 3 is supplied to a yarn feeding means (nip-la 4a, delivery roller 4), a guide. While traveling along the rod 5 and the inlet peripheral portion 7a of the suction means, it is in a state of being charged with static electricity generated by friction between the sliver S and the draft device 2 and the spinning device 3, but has high conductivity and has a high yarn conductivity. Niplo-
Both the roller 4a and the delivery roller 4, the guide rod 5, and the inlet peripheral portion 7a of the suction means have better conductivity than the case of low conductivity. After passing through to an appropriate member such as a frame,
The spun yarn Y
And a nip roller 4a, a delivery roller 4, a guide rod 5,
The charge amount of the inlet peripheral portion 7a of the suction means is always kept at zero.

The yarn clearer 8 detects a yarn defect and detects the yarn Y.
Is cut, the yarn joining carriage 20 travels to the position of the unit, and then the upper and lower yarn ends (a yarn end on the spinning side and a yarn end on the winding side) by the suction pipe 21 and the suction mouth 22.
The yarn Y is clamped momentarily by a clamping device (not shown) in the yarn splicing device 23 at the time of splicing. In the meantime, the yarn Y is continuously sent from the draft device 2 and the spinning device 3 to the downstream side. The slack of the yarn Y on the downstream side of the yarn feeding means caused by a decrease in the yarn tension due to the momentary clamping is sucked into the slack tube 7 and absorbed.

Here, when the winding speed is high, the length of the spun yarn Y sent out in a unit time becomes longer, and the spun yarn Y is sucked into the slack tube 7 but is not spliced. The decrease in thread tension is particularly great. By providing the static electricity removing means as described above, the yarn Y keeps the state without being charged with static electricity. Therefore, the decrease in the thread tension prevents the yarn Y from being attached to each member by static electricity, The occurrence of wobble, loosening and sway of Y can be significantly reduced. When the winding by the winding device 9 is resumed after the completion of the piecing, the slack Y 'sucked and stored by the slack tube 7 is pulled out and returned to a normal winding operation, and an abnormal portion is involved. Not a normal package P
Is generated.

The static electricity removing means is constituted by the surfaces of both the Nip roller 4a and the delivery roller 4, the guide rod 5, and the inlet peripheral portion 7a of the suction means (slack tube) 7.
Of these, only one location may be used, but it is more preferable to cover all three locations. Also, by providing the static electricity removing brush 10, static electricity removing becomes more effective.

[0025]

The present invention is configured as described above.
The following effects are obtained.

According to the first aspect of the present invention, static electricity removing means is provided between the spinning device and the suction means, and the electric charge charged on the running yarn through the static electricity removing means is led out to the ground. The static electricity of the yarn is removed, and the yarn wobble at the time of splicing, which is generated by the adhesion of the yarn to the yarn traveling portion of the spinning machine and the surrounding members by electrostatic force,
It can prevent loosening and chatter.

According to the second aspect of the present invention, both surfaces of the pair of rollers, which are the yarn feeding means on the downstream side of the spinning device, are formed of a highly conductive material, and the surface of the rollers is arc-shaped.
As a result, the electric charge of the running yarn through both roller surfaces is led out to the ground, so that the static electricity of the yarn is removed, and the yarn, the yarn feeding means and the yarn running point are removed. It is possible to prevent the yarn from wobbling, loosening, and twisting at the time of yarn splicing that occurs when the peripheral members adhere to each other by electrostatic force.

According to the third aspect of the present invention, the surface around the entrance of the suction means is formed of a highly conductive material, and the periphery of the entrance of the suction means includes a grounded one. Since the electric charge on the running yarn through the surface of the means surrounding the entrance is led out in the direction of the ground, the static electricity of the yarn is removed, and the yarn and each member around the entrance of the suction means and around the yarn running point are removed. Can be prevented from wobbling, loosening, and twisting at the time of yarn splicing caused by the electrostatic adhesion of the yarn.

According to the present invention, the guide rod for bending the yarn path is formed of a highly conductive material,
By including the grounded guide rod,
The electric charge of the running yarn through the surface of the guide rod is led out in the direction of the ground, so that the static electricity of the yarn is removed, and the yarn adheres to the guide rod and each member in the vicinity of the yarn running position by electrostatic force. Can prevent the yarn from wobbling, loosening, and twisting at the time of splicing.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a spinning machine according to an embodiment.

FIG. 2 is a side sectional view showing the spinning machine of FIG. 1;

[Explanation of symbols]

 2 Draft device 3 Spinning device 4 Delivery roller 4a Niplor 5 Guide rod 6 Suction duct 7 Slack tube 7a Slack tube inlet periphery 8 Yarn clearer 9 Winding device 10 Static elimination brush 20 Yarn bogie 21 Suction Pipe 22 Suction mouth 23 Yarn splicing device (notter) S Sliver Y Spun yarn

Claims (4)

[Claims] 1. A spinning device for forming a yarn by twisting a fiber bundle, a suction means for absorbing slack of the yarn at the time of splicing, and a winding device for winding a spun yarn are provided along the yarn running direction. A spinning machine provided with static electricity removing means between a spinning device and a suction means. 2. A yarn feeding means comprising a pair of rollers on the downstream side of said spinning device, wherein said static elimination means cleans both rollers constituting said yarn feeding means with a highly conductive material. 2. A spinning machine according to claim 1, wherein said spinning machine includes a roller surface grounded. 3. The suction device according to claim 1, wherein the static electricity removing means includes a material having a high conductivity material around the entrance of the suction means and a grounded material around the entrance of the suction means. Spinning machine. 4. It has a guide rod for bending a yarn path,
The spinning machine according to any one of claims 1 to 3, wherein the static elimination means includes a guide rod formed of a highly conductive material and a grounded guide rod.