JPH09157970A - Ending apparatus for spinning frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the percentage of success of ending operation by applying a force to remove a reversely wound yarn to a spun yarn wound back from a package and stored in a slack tube. SOLUTION: In an ending work in a spinning frame using a gyrating air flow, a broken spun yarn Y is wound back from a package 5 and a yarn finger t1 of a transfer arm member T to hold the yarn end is moved to a part near a yarn discharging port of a spindle member 2b separated from a nozzle member 2a. In the above operation, an air ejection part S is actuated to blast air from the air blasting port S1 toward the suction port 4a of a slack tube 4 or the suction force of the slack tube 4 is temporarily increased to apply a force to the spun yarn Y to remove the reversely wound yarn Y' when the rewound spun yarn Y is sucked and stored in a sucking slack tube 4. A spun yarn Y having a prescribed length is stored in the slack tube 4 by this procedure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn splicing device for splicing cut spun yarns in a spinning machine for producing spun yarns using a swirling air flow.

[0002]

2. Description of the Related Art Conventionally, a piecing apparatus of a spinning machine which performs piecing in the following order is known. Reverse the package in which the cut spun yarn is entangled,
The cut spun yarn is rewound, and then the rewound spun yarn is stored for a predetermined length in a slack tube utilizing suction force, and the yarn end of the rewound spun yarn is separated from the nozzle member. It is arranged in the vicinity of the yarn discharge port of the wound spindle member, and then the unwound spun yarn is inserted into the spindle member. After that, the spindle member and the nozzle member are joined, and then the driving of the draft device is restarted, and the sliver is supplied to the spinning unit composed of the spindle member and the nozzle member, which are also restarted, and the nip roller separated from each other is removed. The spun yarn that has been spliced is brought into contact with the delivery roller and run in the package direction. At the same time, the package is rotated in the winding direction to wind the spliced yarn spliced into the package, but the spun yarn stored in the slack tube is first wound into the package, and the package is wound. At the time when the speed and the spinning speed are substantially equal to each other, all of the spun yarn stored in the slack tube is discharged from the slack tube, and the spinning state returns to a steady state.

[0003]

In the yarn splicing device of the conventional spinning machine, the package in which the cut spun yarn is wound is reversed, and the cut spun yarn is unwound from the package and stored in the slack tube. However, there is a problem in that the unwound spun yarn winds around the package in the direction opposite to the winding direction of the spun yarn on the package, and the spun yarn of a predetermined length is not stored in the slack tube.

The problem of the above-described yarn splicing device for a spinning machine will be described with reference to FIG. 5, which is a schematic side view of the spinning machine.

Reference numeral 1 denotes a draft device comprising a front roller 1a, a second roller 1b having an apron, a third roller 1c and a back roller 1d.
Is a spinning unit including a nozzle member 2a and a spindle member 2b which can be brought into contact with and separated from the nozzle member 2a. T is a transfer arm member disclosed in Japanese Unexamined Patent Application Publication No. 6-173129, which is a prior application of the present applicant, and the tip of the transfer arm T is unwound from the package by a suction mouth (not shown). In order to grip the yarn end of the spun yarn y thus formed and to insert the grasped spun yarn y into the spindle member 2b, the spun yarn y
A yarn finger t1 capable of feeding out is arranged. The transfer arm member T is configured to be able to move the yarn finger t1 from the lower standby position to the vicinity of the yarn discharge port of the spindle member 2b separated from the nozzle member 2a. In addition, b is a sliver sandwiched between the third roller 1c and the back roller 1d, the rotation of which is stopped at the time of thread cutting.

Reference numeral 3 is a spun yarn delivery member comprising a delivery roller 3a which is constantly rotating and a nip roller 3b which can be brought into contact with and separated from the delivery roller 3a.
This is the slack tube described above. 5 is a package in which the spun spun yarn y is wound, which is rotated by a suitable driving device such as a friction roller (not shown), and 6 cooperates with a suction mouth (not shown), A reverse roller for rewinding the cut spun yarn y from the package.

The package 5 in which the cut spun yarn y is wound is reversely rotated by the reverse rotation roller 6 to rewind the cut spun yarn y from the package 5, and the yarn end of the unwound spun yarn y is rewound. , Is transferred to the yarn finger t1 of the transfer arm member T via a suction mouse (not shown). After that, the yarn finger t1 holding the yarn end of the unwound spun yarn y is
While being conveyed near the yarn discharge port of the spindle member 2b separated from the nozzle member 2a, the unwound spun yarn y is stored in the slack tube 4 for a predetermined length.

However, when the package 5 in which the cut spun yarn y is wound is reversed by the reversing roller 6 and the cut spun yarn y is unwound from the package 5, the spinning to be unwound from the package 5 is performed. Thread y
The so-called reverse winding yarn, which is attached to the package 5 and is wound around the package 5 in the direction opposite to the winding direction of the spun yarn y around the package 5, is referred to as y ′ in FIG. 5, is formed. When such a reversely wound yarn y ′ is formed, there arises a problem that the spun yarn y having a predetermined length necessary for yarn joining is not stored in the slack tube 4.

Even if the yarn splicing is successful, if the reverse winding yarn y'is still formed, the reverse winding yarn y'will be re-rotated in the winding direction of the spun yarn y after the yarn joining. However, it will be caught in the package 5. As described above, the reversely wound yarn y ′ wound in the package 5 causes entanglement of the spun yarn y to be rewound and fluctuations in the rewinding tension in the subsequent rewinding work.

An object of the present invention is to provide a yarn splicing device for a spinning machine, which solves the problems of the conventional yarn splicing device for a spinning machine described above and has an improved success rate.

[0011]

In order to achieve the above-mentioned object, the present invention provides a spun yarn that is unwound from a package and stored in a slack tube with an action force for removing a reversely wound yarn. In addition, the acting force is generated by an air jet blown toward the suction port of the slack tube, and further, the acting force is increased by temporarily increasing the suction force of the slack tube. It has been generated.

Below, FIG. 1, which is a schematic side view of the spinning machine,
An embodiment of the present invention will be described with reference to FIG. 2 which is also a schematic side view of the spinning machine and FIG. 3 which is an enlarged plan view of the vicinity of the yarn fingers of the transfer arm member.
The present invention is not limited to the embodiment unless it exceeds the gist of the present invention. The draft device 1, the spinning unit 2, the transfer arm member T, the spun yarn feeding member 3, the slack tube 4, etc. are the same as those of the spinning machine shown in FIG. Has been done.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, S is an air injection member disposed on a suitable frame of a spinning machine or a yarn splicing carriage running along the longitudinal direction of the spinning machine.
The air injection port s1 is the suction port 4 of the slack tube 4.
a.

As described above, the yarn finger t1 of the transfer arm member T holding the yarn end of the spun yarn y unwound from the package 5 is connected to the nozzle member 2a.
The rewound spun yarn y is sucked and stored in the slack tube 4 in the suction state when conveyed to the vicinity of the yarn discharge port of the spindle member 2b separated from the slack tube 4. At the time when the spun yarn y is stored or when the unwound spun yarn y crosses the suction port 4a of the slack tube 4, the air jetting member S is actuated, and the slack is blown from the air jet port s1. Tube 4
The air is jetted toward the suction port 4a. Then, the spun yarn y unwound from the package and stored in the slack tube is added with an action force for removing the reversely wound yarn y ′, and thus, as shown by the chain double-dashed line,
The reversely wound yarn y ′ is separated from the package 5, and the spun yarn y having a desired length is stored in the slack tube 4. It should be noted that the air injection member S can be operated in advance when the yarn breakage occurs.

When the air jetting member S interferes with the running of the spun yarn y in the steady state which is spun and wound up on the package 4, for example, the shaft s2 located below the slack tube 4 is used. It is also possible to rotate downward about the center and to retract it.

Next, another embodiment of the present invention will be described with reference to FIGS.

In this embodiment, the air injection member S '
Are arranged on the arm t3 of the transfer arm member T which rotates about the axis t2.

As disclosed in Japanese Patent Application Laid-Open No. 6-173129, which is a prior application of the present applicant, the transfer arm member T is formed by winding the spun spun yarn y around the package 4. In the steady state in which the axis t2
It is in the standby position rotated downward about. When the yarn breakage occurs, the transfer arm member T rotates upward as shown in FIG. 2, and the yarn end of the spun yarn y unwound from the package 5 by the yarn finger t1 is moved as described above. The yarn end of the spun yarn y is grasped and conveyed to the vicinity of the yarn discharge port of the spindle member 2b separated from the nozzle member 2a. The spun yarn y is sucked into the slack tube 4 during or after the yarn end of the spun yarn y is conveyed.

The yarn finger t1 holding the yarn end
Is the spindle member 2b separated from the nozzle member 2a
The air injection port s3 of the air injection member S ′ provided on the arm t3 is arranged to face the suction port 4a of the slack tube 4 when the air injection port S3 is arranged near the yarn discharge port. Then, when the air injection port s3 is located opposite to the suction port 4a of the slack tube 4, the air injection member S ′ is operated to move from the air injection port s3 toward the suction port 4a of the slack tube 4. , Jet air. Then, the spun yarn y unwound from the package and stored in the slack tube is added with an action force for removing the reverse wound yarn y ′, and therefore, as indicated by the two-dot chain line, Y'is separated from the package 5, and the spun yarn y having a desired length is stored in the slack tube 4.

In FIG. 3, the transfer arm member T is used to convey the yarn end of the spun yarn y gripped by the yarn finger t1 to the vicinity of the yarn discharge port of the spindle member 2b.
When the arm t rotates upward from the lower standby position,
The air jetting member S ′ arranged in 3 rotates between the standby position and the operating position so as not to come into contact with the spinning machine or interfere with the unwound spun yarn y. An embodiment is shown that is configured to allow

The air injection member S "is attached to a block s5 which is rotatable around an axis s4 arranged on the arm t3 of the transfer arm member T. The arm t is also attached.
A cylinder s7 having a rear portion pivotally supported on a shaft s6 disposed on the arm 3 is provided in parallel with the arm t3.
A block arm s5 'extending from the block s5 is pivotally attached to the tip of the piston rod s7'.

When the transfer arm member T is rotated upward from the lower standby position, the cylinder s7 is appropriately operated to retract the piston rod s7 ', which is indicated by the solid line in FIG. Thus, the air injection member S ′ is arranged so as to be substantially parallel to the arm t3.

When the transfer arm member T rotates upward so that the yarn finger t1 holding the yarn end is located near the yarn discharge port of the spindle member 2b, the cylinder s7 is appropriately rotated. By actuating the piston rod s7 'to move forward, the block s
3 is rotated counterclockwise in FIG. 3 about the axis s4, and the air injection port s3 of the air injection member S ′ is the suction port of the slack tube 4 as shown by the chain double-dashed line. It is arranged so as to face 4a. Then, as described above, the air injection member S ″ is operated to inject air from the air injection port s3 toward the suction port 4a of the slack tube 4.

Another embodiment of the invention is shown in FIG. 4, which is a vertical cross-sectional view of the slack tube 4.

The embodiment shown in FIG. 4 does not use the air injection members S, S ', S "for injecting air toward the suction port 4a of the slack tube 4 in the above-mentioned embodiment. In this embodiment, an air jet hole 7 is formed at an appropriate position of the slack tube 4 on the side opposite to the suction port 4a of the slack tube 4 through which the spun yarn y is sucked. A pipe 8 connected to a compressed air supply source (not shown) is connected to the ejection hole 7.

As described above, when the spun yarn y rewound in the slack tube 4 is stored, or when the rewound spun yarn y is collected, the suction port 4a of the slack tube 4 is used.
At the time of crossing, by operating a compressed air supply source (not shown) or a valve arranged in the middle,
Air is ejected from the air ejection holes 7 to generate an air flow in a direction in which the spun yarn y is sucked by the slack tube 4.
Then, the spun yarn y unwound from the package and stored in the slack tube is applied with an action force for removing the reverse wound yarn y ′, and the reverse wound yarn y ′ is separated from the package 5.

Further, instead of providing the air injection members S, S ', S "for injecting air toward the suction port 4a of the slack tube 4, it is shown to generate a suction air flow in the slack tube 4. When the spun yarn y rewound on the slack tube 4 is stored, or when the unwound spun yarn y crosses the suction port 4a of the slack tube 4, By temporarily strengthening the spun yarn y stored in the slack tube, an action force for removing the reverse wound yarn y ′ may be added to remove the reverse wound yarn y ′ from the package 5. it can.

[0028]

Since the present invention is constructed as described above, the following effects can be obtained.

Since the formed reverse winding yarn can be removed, the spun yarn of a predetermined length required for yarn splicing can be stored in the slack tube, and therefore the success rate of yarn splicing is improved.

Since the formed reverse winding yarn is removed and the reverse winding yarn is not wound into the package after the splicing, in the subsequent rewinding operation, the entanglement of the spun yarn to be rewound and the fluctuation of the rewinding tension are caused. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a spinning machine.

FIG. 2 is a schematic side view of a spinning machine similar to that of FIG.

FIG. 3 is an enlarged plan view near a yarn finger of a transfer arm member.

FIG. 4 is a vertical sectional view of a slack tube to which the present invention is applied.

FIG. 5 is a schematic side view of a spinning machine similar to FIG. 1 for explaining the problems of the conventional yarn splicing device.

[Explanation of symbols]

 1 --- Draft device 2 ---- Spinning unit 3 ...- Spun yarn feeding member 4 ...- Slack tube 5 ... Package S, S ', S "... Air injection member T ... Transfer arm member

Claims (3)

[Claims] 1. A yarn splicing device for a spinning machine, wherein a spun yarn unwound from a package and stored in a slack tube is provided with an action force for removing a reversely wound yarn. 2. The yarn splicing device for a spinning machine according to claim 1, wherein the acting force is generated by an air jet blown toward the suction port of the slack tube. 3. The yarn splicing device for a spinning machine according to claim 1, wherein the acting force is generated by temporarily increasing the suction force of the slack tube.