JP2000303276A - Spinning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spinning apparatus capable of preventing the malfunction caused by attachment of fly waste or the like attached to a spun yarn to a tension sensor from being caused, and improving the operability by arranging the tension sensor at the downstream side of a slack tube. SOLUTION: This spinning apparatus has a slack tube 7 which is a sucking member usable at the time of piercing, and a tension sensor 9 arranged at the downstream side of the slack tube 7. Preferably, a cutter member 8 is closely arranged at the upper side of the tension sensor 9, and a yarn clearer 10 is closely arranged at the lower side of the tension sensor 9. The tension sensor 9 is arranged in a moving member 15 for temporarily holding the spun yarn Y spun and twisted at the time of piercing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension sensor, which measures the tension of a yarn, and reduces the binding force and convergence force of the fibers constituting the yarn so that the yarn is easily stretched and cut off.
The yarn wound in the winding package while being traversed is detected over the normal traverse range and is wound around the paper tube, a so-called anomaly such as twill drop, when the tension is out of the allowable range. The present invention relates to a spinning device that removes a weak yarn portion and corrects an abnormal condition such as twill drop.

[0002]

2. Description of the Related Art Conventionally, a sliver drafted by a drafting device is supplied to a spinning section comprising a nozzle section for generating a swirling air flow and a stationary spindle section.
The spun yarn generated in the spinning section is sent out in the winding package direction by a yarn feeding member including a delivery roller and a nip roller, and then, the yarn feeding member and the downstream side of the yarn feeding member (in the running direction of the spun yarn). There is known a spinning device that detects a yarn tension by a tension sensor disposed between the slack tube and a slack tube, and then winds the yarn into a winding package while traversing the spun yarn through a yarn clearer. ing.

[0003]

In a conventional spinning apparatus, a spun yarn transferred by a yarn feed member is directly disposed at the tip of a detection arm of a tension sensor without passing through a fixed guide or the like. Since it is engaged with the guide, there is a problem that an accurate tension cannot be detected due to the influence of disturbance that is not caused by the fluctuation of the tension that should be measured, such as the fluctuation of the spun yarn.

[0004] In splicing, the seed yarn unwound from the winding package is stored in a slack tube configured as a suction member such as a suction tube, and then inserted into a spinning unit. By restarting the drive of the draft device, spinning unit, winding device, etc., the seed yarn inserted into the spinning unit is
Feeding is performed in the direction of the winding device, and piecing is performed. After the rotation of the winding package resumes, the seed yarn stored in the slack tube will be wound for a while,
Since the seed yarn is stored in the slack tube with a weak suction force, the seed yarn stored in the slack tube is loosely wound because it is wound around the winding package with a smaller tension than normal tension. Will be. As described above, when the winding package has a part that is loosely wound, the shape of the winding package becomes poor, or in the next process, the fluctuation in the unwinding tension when unwinding the yarn from the winding package is large. There were problems such as becoming.

An object of the present invention is to solve the problems of the above-described conventional spinning device.

[0006]

According to the present invention, there is provided a spinning apparatus having a slack tube which is a suction member used at the time of splicing, etc. Secondly, a tension sensor is disposed on the downstream side, and second, a cutter member is disposed adjacent to above the tension sensor, and a yarn clearer is disposed adjacent to below the tension sensor. Third, a tension sensor is used to temporarily control the spun yarn spun at the time of splicing.
It is arranged on a moving member that is held outside the yarn clearer.

[0007]

Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments unless it departs from the gist of the present invention.

First, the overall configuration of a spinning unit U constituting a spinning apparatus as an example will be described with reference to FIG.

D is a four-wire draft device as an example, and includes a front roller 1, a second roller 2 having an apron 2a, a third roller 3, and a back roller 4. Reference numeral 5 denotes a spinning unit including a nozzle unit for generating a swirling air flow and a spindle unit in a stationary state, and twists fibers constituting a sliver using the swirling air flow to generate a yarn. Numeral 6a denotes a nip roller which can freely contact and separate from a constantly rotating delivery roller 6b, and includes a nip roller 6a and a delivery roller 6b.
b constitutes a yarn feeding member 6 that sandwiches the spun yarn Y and sends out the spun yarn Y. 7 is a slack tube configured as a suction tube, 8 is a cutter member described later, 9 is a yarn tension measuring member described later, and 10 is a yarn clearer. Reference numeral 11 denotes a winding package which is rotated while being in contact with the friction roller 12, and the spun yarn Y spun by the spinning unit 5 is:
The traverse guide 1 reciprocates along the axis of the friction roller 12 by a traverse device (not shown).
3, while being traversed, it is taken up by the take-up package 11.

The fiber constituting the sliver S drawn out from the can 14 and drafted by the drafting device D is spun into a spun yarn Y by a spinning section 5 comprising a nozzle section for generating a swirling air flow and a stationary spindle section. After that, the sheet is nipped by the nip roller 6a and the delivery roller 6b, sent to the take-up package 11, and taken up by the take-up package 11 which is rotated in contact with the friction roller 12.

A spinning unit U is constituted by the draft device D, the spinning section 5, the yarn feeding member 6, the slack tube 7, the cutter member 8, the tension sensor 9, the yarn clearer 10, the winding package 11, the friction roller 12, and the like. A number of such spinning units U are arranged side by side to constitute a spinning apparatus.

Next, the cutter member 8 will be described with reference to FIG. The housing 8a of the cutter member 8 includes
A recess 8b into which the spun yarn Y is inserted and guided is formed. An anvil 8c is attached to one side of the recess 8b, and a cylinder 8d is provided on the other side. The cylinder 8d is attached to the tip of a piston rod 8e of the cylinder 8d. The blade 8f that has been removed is
c. 8g is a pair of guide plates attached to the housing 8a near the tip of the concave portion 8b to facilitate introduction of the spun yarn Y into the concave portion 8b. Tension sensor 9 or yarn clearer 10
When the cylinder 8d operates and the piston rod 8e advances by a command from a central control unit (not shown) based on a command from the controller or based on a signal from the tension sensor 9 or the yarn clearer 10,
The blade 8f attached to the tip of the piston rod 8e comes into contact with the anvil 8c, and the spun yarn Y inserted into the recess 8b.
Will be disconnected.

Next, the tension sensor 9 will be described with reference to FIGS. The tension sensor 9
Perpendicular to the longitudinal direction of the spinning machine frame, that is,
It is mounted on a movable plate 15 as a movable member that can be moved back and forth by a driving device (not shown) from the back of the machine base in the yarn path direction. The moving plate 15 is an arm 15a of the moving plate 15.
Is attached to a piston rod of a cylinder (not shown), and can be moved back and forth by operating the cylinder and moving the piston rod back or forth, or by a cam mechanism (not shown) through a suitable link, Arm 1
It is configured to be able to move back and forth by moving the 5a forward and backward.

Reference numeral 9a denotes a housing of the tension sensor 9, which is mounted on the moving plate 15. 9b is a detection arm extending from a window 9c formed in the housing 9a along the longitudinal direction of the machine base of the spinning device. One end of the detection arm 9b is attached to an elastic plate 9d attached to the housing 9a, and a free end, which is the other end of the detection arm 9b, is located on the back side of the machine stand. A thread guide 9e having a concave portion 9e 'into which the spun yarn Y is inserted is attached. Reference numeral 9f denotes a strain gauge attached to the elastic plate 9d. The detection arm 9b swings according to the tension of the spun yarn Y inserted into the concave portion 9e 'of the yarn guide 9e, and the detection arm 9b swings. As a result, the elastic plate 9d to which the strain gauge 9f is attached is deformed, and the strain gauge 9f reads this deformation and converts it into a tension signal in the central control unit to detect the tension fluctuation, as is known. It is configured.

A slit 15b is formed on the side of the movable plate 15 opposite to the arm 15a, and the slit 15b is formed so as to face the concave portion 9e 'of the thread guide 9e in a plan view. A concave portion 15b 'is formed on the edge to be formed. The movable plate 15 is formed such that a thread guide piece 15c extends along the detection arm 9b.

As described above, below the nip roller 6a and the delivery roller 6b constituting the yarn feeding member 6, ie, downstream, the slack tube 7, the cutter member 8,
The tension sensor 9 and the yarn clearer 10 placed on the moving plate 15 are sequentially arranged. As described above, the cutter member 8 is located above the tension sensor 9 placed on the movable plate 15 and approaches the tension sensor 9, and the yarn is located below the tension sensor 9 and approaches the tension sensor 9. A clearer 10 is arranged.

The spun yarn Y spun by the spinning unit 5 is sandwiched between a nip roller 6a and a delivery roller 6b, and is sent toward the winding package 11. Then
The detection arm 9 of the tension sensor 9 inserted into the recess 8 b of the cutter member 8 and then placed on the moving plate 15
b is guided by the recess 9e 'of the thread guide 9e attached to the free end of the yarn clearer 10, and then the recess 10a of the yarn clearer 10.
Is inserted into. During the spinning of the spun yarn Y, as shown in FIGS. 2 and 4, the moving plate 15 is located at a position moved in the depth direction of the machine stand. The spun yarn Y inserted in the concave portion 10a of the yarn clearer 10 is free from the concave portion 8b of the cutter member 8 and the free end of the detection arm 9b of the tension sensor 9 located in the depth direction of the machine base from the concave portion 10a of the yarn clearer 10. Is deflected in the depth direction of the machine base by the thread guide 9e attached to the main body, and is bent in a substantially rectangular shape when viewed from the side. Thereafter, the spun yarn Y is wound around the winding package 11 while being traversed by a traverse guide 13 that reciprocates along the axis of the friction roller 12 by a traverse device (not shown).

As described above, the spun yarn Y is supplied to the concave portion 8b of the cutter member 8 and the concave portion 10a of the yarn clearer 10.
The yarn guide 9e attached to the free end of the detection arm 9b of the tension sensor 9 located further in the depth direction of the machine is deflected in the depth direction of the machine and is substantially shaped like a letter when viewed from the side. Since it is bent in a shape, the yarn path does not largely swing, and therefore, an accurate tension can be measured.

The fly waste and the like adhering to the spun yarn Y generated in the spinning section 5 constantly pass through the vicinity of the slack tube 7 in the suction state, and the slack tube 7
Is removed by suction. In the present embodiment, since the tension sensor 9 is disposed on the downstream side of the slack tube 7, fly waste and the like adhering to the spun yarn Y introduced into the tension sensor 9 are introduced into the tension sensor 9. Before being removed, the slack tube 7 sucks and removes the yarn. Therefore, it is possible to prevent fly cotton or the like adhering to the spun yarn Y from adhering to the tension sensor 9 and causing the tension sensor 9 to malfunction. .

If a weak yarn portion is present in the spun yarn Y, the binding force and the convergence force of the fibers constituting the yarn are loosened and extended, so that the tension is reduced and the tension falls outside a predetermined allowable range.
Also, when the spun yarn Y wound up in the winding package 11 while being traversed goes beyond the normal traverse range and is wound around the paper tube 11a, that is, when a so-called twill drop occurs, the tension similarly decreases. Out of the predetermined allowable range. When such tension fluctuation is detected by the tension sensor 9, the driving of the spinning unit U is stopped based on a command from a central control unit (not shown) to remove the weak yarn portion of the spun yarn Y. Or
Fix the spill.

Also, the yarn clearer 10 is used to
When a slab or the like is detected, the cylinder 8d of the cutter member 8 is operated by a command from the yarn clearer 10 or by a command from a central control unit (not shown) to advance the piston rod 8e. ,
The blade 8f attached to the tip of the piston rod 8e is brought into contact with the anvil 8c to cut the spun yarn Y inserted into the recess 8b.

As described above, when the tension sensor 9 detects a weak yarn portion or a twill drop of the spun yarn Y, or when the yarn clearer 10 detects a slab or the like of the spun yarn Y, the spinning unit The drive of U is stopped, and thereafter, the piecing operation is performed. When the driving of the spinning unit U is stopped, a driving device (not shown) is operated to push the moving plate 15 forward of the machine base. When the moving plate 15 is extruded in the forward direction of the machine base, as shown in FIG.
The yarn clearer 10 is guided so as to be guided by the concave portion 15 b ′ and discharged from the concave portion 10 a of the yarn clearer 10 so as not to be detected by the yarn clearer 10. If the running speed of the yarn is slower than a predetermined speed, the yarn clearer 10 malfunctions to determine a portion that would not otherwise be defective as a defect. Until the yarn speed of the spun yarn Y reaches a predetermined speed, the moving plate 15 is pushed out in the forward direction of the machine stand to prevent the spun yarn Y from entering the yarn clearer 10. . After the yarn speed of the spun yarn Y reaches a predetermined speed, the moving plate 15 is moved in the rearward direction of the machine base to move the spun yarn Y to the concave portion 10 of the yarn clearer 10.
Insert into a.

At the time of the piecing operation, the spun yarn Y wound around the winding package 11 is pulled out. The spun yarn Y pulled out from the winding package 11 is engaged with the concave portion 15b 'formed in the moving plate 15 at the position pushed forward in the machine direction, and the concave portion 1b of the yarn clearer 10 is formed.
0a is not inserted. Thereafter, the spun yarn Y pulled out from the winding package 11 passes through the cutter member 8 and is stored in the slack tube 7 for a predetermined length, and further, the delivery roller 6b and the nip roller 6a separated from the delivery roller 6b. It passes through the space, is inserted into the spinning unit 5 in the stopped state, is discharged from the sliver introduction hole of the spinning unit 5 on the front roller 1 side, and hangs down.

From such a state, the supply of the sliver S is resumed, the spinning unit 5 is driven, and the nip roller 6a is brought into contact with the constantly rotating delivery roller 6b, so that the spun yarn Y Winding package 1
Transfer in one direction is started. The winding package 11 separated from the friction roller 12 also has
Winding is resumed by contacting the friction roller 12. In this manner, the splicing operation is performed. When the yarn speed of the spun yarn Y reaches a predetermined speed, the moving plate 15 is moved in the depth direction of the machine base, and as described above, A yarn guide 9 attached to the concave portion 8b of the cutter member 8 and the detection arm 9b of the tension sensor 9
e and the recess 10a of the yarn clearer 10
And as shown in FIG. 4, it is bent in a substantially U-shape.

In the piecing operation, when the winding of the spun yarn Y by the winding package 11 is resumed,
The spun yarn Y stored in the slack tube 7 is wound around the winding package 11.
When the spun yarn Y stored and loosened is wound on the winding package 11 as it is, the spun yarn Y is loosely wound on the winding package 11 as described above. As described above, if there is a portion that is loosely wound on the winding package 11, the shape of the winding package 11 becomes worse, or the unwinding tension when unwinding the yarn from the winding package 11 in the next step. There are problems such as a large fluctuation. Also, when a yarn wound with normal tension is wound on a loosely wound yarn layer,
Threads wound under normal tension can dig into loosely wound soft yarn layers. When the yarn wound with such a normal tension is unwound from the winding package 11 in which the loosely wound soft yarn layer cuts, the unwound yarn becomes a loosely wound soft yarn layer. Caught on,
The unwinding tension will be abnormally large or the yarn will break. However, in the present embodiment, as described above, the spun yarn Y is bent into a substantially rectangular shape by the cutter member 8, the tension sensor 9 that has advanced forward, and the yarn clearer 10, and tension is applied. The spun yarn Y is not loosely wound around the winding package 11, so that the shape of the winding package is deteriorated, or in the next process, the yarn is unwound from the winding package. An increase in the return tension fluctuation can be prevented.

In the above-described embodiment, the spinning unit 5 includes
Although an example is shown in which a spinning air flow is generated by a nozzle unit and a stationary spindle unit, the spinning unit is formed by a pneumatic spinning nozzle and a false twisting unit including a pair of false twisting rollers and an endless belt. , And
The air spinning nozzle may be arranged in a plurality of stages.

[0027]

Since the present invention has the above-described structure, the following effects can be obtained.

When winding the yarn while absorbing the slack of the yarn at the time of splicing, a tension sensor located downstream of the slack tube functions as a tensioner for applying tension to the slack yarn, and the spinning is performed during spinning. If the slack tube is kept in the suction state, the cotton wool and the like adhering to the spun yarn are removed by suction by the slack tube before being introduced into the tension sensor. Cotton can be prevented from adhering to the tension sensor and causing the tension sensor to malfunction.

[0029] Since the cutter member is arranged close to above the tension sensor and the yarn clearer is arranged close to below the tension sensor, the yarn path of the spun yarn is stabilized, and therefore, accurate tension measurement is possible. It can be performed.

At the time of splicing, the tension sensor is disposed on the moving member that temporarily holds the spun yarn spun out of the yarn clearer. The spun yarn can be reliably moved to the measurement position and can be inserted into the yarn clearer.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a spinning unit constituting a spinning apparatus of the present invention.

FIG. 2 is a perspective view of a main part of a spinning unit constituting the spinning device of the present invention.

FIG. 3 is a plan view including a partial cutout of a tension sensor and the like of the spinning device of the present invention.

FIG. 4 is a side view of a main part of a spinning unit constituting the spinning apparatus of the present invention.

FIG. 5 is a side view of a main part of a spinning unit constituting the spinning device of the present invention, similar to FIG.

[Explanation of symbols]

 7 ... slack tube 8 ... cutter member 9 ... tension sensor 10 ... yarn clearer 15 ...・ Movable plate (moving member)

Claims (3)

[Claims] 1. A spinning apparatus having a slack tube which is a suction member used at the time of piecing, etc., wherein a tension sensor is provided downstream of the slack tube. 2. The spinning apparatus according to claim 1, wherein a cutter member is disposed adjacent to above the tension sensor, and a yarn clearer is disposed adjacent to below the tension sensor. 3. The tension sensor according to claim 1, wherein the tension sensor is provided on a moving member for temporarily holding the spun yarn spun out of the yarn clearer at the time of splicing. Spinning equipment.