JP2773670B2 - Spinning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning apparatus for producing a spun yarn using a swirling air flow.

[0002]

2. Description of the Related Art Conventionally, there is provided a nozzle for applying a swirling airflow to a fiber bundle exiting a draft device, a hollow spindle, and a needle-like guide member having a needle tip opposed to a tip of the hollow spindle on a fiber introduction side. 2. Description of the Related Art There is known a spinning apparatus for producing a spun yarn by twisting fibers by swirling airflow.

[0003]

In the above-mentioned conventional spinning apparatus, the needle-shaped guide member is disposed opposite to the tip of the hollow spindle on the fiber introduction side.
The fiber transport path from the needle-shaped guide member to the hollow path of the hollow spindle is narrowed, and consequently, foreign matter such as leaf residue (hereinafter referred to as “trash”) contained in the sliver is jammed in the transport path. Therefore, there is a problem that a thread break is caused.

[0004] Further, since the needle-shaped guide member is disposed facing the distal end of the hollow spindle on the fiber introduction side, the fibers cannot be sufficiently ballooned at the distal end of the hollow spindle on the fiber introduction side. Therefore, there is a problem that the trash contained in the sliver is not blown off by the centrifugal force but remains in the spun yarn to be spun.

[0005] An object of the present invention is to solve the problems of the above-described conventional spinning device for producing a spun yarn using a swirling airflow and to provide a spinning device with improved spinnability. .

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a spinning apparatus having a nozzle for applying a swirling airflow to a fiber and a hollow spindle, the vicinity of a tip of the hollow spindle on the fiber introduction side. And a fiber introduction member having a fiber guide surface twisted in the direction of rotation of the suction air is provided, and the supplied vertebra is moved along the twisted fiber guide surface.
Are as hereinbefore to convey, also, which has a twist angle of the fiber guide surface of the fiber introduction member is 80 degrees or more, and further, the fiber introduction side of the fiber introduction member and the hollow spindle tip And a gap is formed between them.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the embodiments without departing from the spirit of the present invention.

First, the overall structure of the spinning apparatus of the present invention will be described with reference to FIG. 1 which is a schematic side view of the spinning apparatus.

L is a sliver supplied to a draft device D via a sliver guide G, and the draft device D
The sliver L drafted by the drafting device D is composed of a back roller d1, a third roller d2, a second roller d3 having an apron, and a front roller d4. After being supplied to the unit U and being formed into a spun yarn Y by the spinning unit U, the spun yarn Y passes through a spun yarn sending-out device H including a nip roller h1 and a delivery roller h2, a slab catcher Z, and the like, and is supplied to the winding portion W. It is driven by the friction roller w1 and wound around a package w3 supported by the cradle arm w2. Note that d4 'is a bottom roller of the front roller d4, and d5 is a clutch device such as an electromagnetic clutch for stopping or driving the back roller d1 or the third roller d2.

Next, the spinning unit U shown in FIG.
With reference to FIG. 2 which is a vertical sectional view along the running direction of the spun yarn Y, a spinning unit U comprising a nozzle member N and a spindle member S which can be separated from each other will be described.

Reference numeral n1 denotes a nozzle. The nozzle n1 sandwiches the flange portion n1'n1 "of the nozzle n1 between the nozzle housing n2 and the nozzle support plate n4 fitted into the inner peripheral recess n3 'of the nozzle outer frame n3. At the same time, the nozzle housing n2 and the nozzle support plate n4 are disposed between the nozzle housing n2 and the nozzle support plate n4 by being connected with bolts n5, and n6 is disposed at a predetermined interval. Is an air chamber formed by the two flange portions n1′n1 ″ of the nozzle n1 and the nozzle housing n2. The inside of the nozzle n1 is communicated from the air chamber n6 to the substantially cylindrical hollow chamber n7 of the nozzle n1. An air injection hole n8 is formed in a tangential direction of the peripheral surface.
Are formed in the circumferential direction of the nozzle n1 in plural numbers, for example, four. The nozzle member N is mainly constituted by the nozzle n1, the nozzle housing n2, the nozzle outer frame n3, and the nozzle support plate n4.

S1 is a hollow spindle having a hollow passage s1 'attached to a spindle support frame s2, and s3
Is a sliding frame having a guide hole s4 into which the guide rod G attached to the above-mentioned nozzle outer frame n3 and the like is loosely fitted. At a substantially central portion of the sliding frame s3, one of the spindle support frames s2 is provided. A hole s3 'is provided for accommodating the spun yarn Y discharge side end of the hollow spindle s1 attached to the spindle spindle support frame s2. Further, the sliding frame s3 has a plurality of, for example, three through holes s5 at appropriate intervals.
A flange portion s6 having a bolt insertion hole s6 ′ having a diameter smaller than the inner diameter of the through hole s5 is bulged in the middle of the inner periphery of the through hole s5. ing. s7 is a protrusion provided on the spindle support frame s2 whose tip is inserted into the through hole s5.

The head s8 'is in contact with or close to the flange s6 protruding into the through hole s5, the body s8 "is inserted into the bolt insertion hole s6', and the tip thereof is formed. Are bolts screwed into the protrusion s7 provided on the spindle support frame s2, and s9 is a protrusion s7 provided on the flange s6 and the spindle support frame s2.
And a compression coil spring disposed between the end faces of the compression coil springs. The spindle support frame s2 is connected to the sliding frame s3 via bolts s8, and the spindle support frame s2 and the sliding frame s3 are urged away from each other by a compression coil spring s9. I have. The head s8 'of the bolt s8 is connected to the bolt insertion hole s.
It is configured to be hooked on the flange portion s6 without passing through 6 '.

S2 'is a substantially disc-shaped fitting portion provided on the nozzle n1 side of the spindle support frame s2.
A radius is formed on the shoulder s2 ″ of the 2 ′.
Numeral 0 is a trumpet-shaped guide attached to an end of the hollow spindle s1 on the spun yarn Y discharge side, for guiding a main thread inserted into the hollow passage s1 ′ of the hollow spindle s1 at the time of splicing. Tube.

Mainly, the above-mentioned hollow spindle s1,
Spindle support frame s2, sliding frame s3, bolt s
8, the spindle member S is constituted by the compression coil spring s9 and the guide tube s10.

Reference numeral s11 denotes a pin protruding from the side wall of the sliding frame s3. The pin s11 can be swung right and left in FIG. 2 around a predetermined fulcrum by a piston rod (not shown). The moving lever V is fitted into a concave portion v1 provided at the tip of the moving lever V. Therefore, by moving the swing lever V to the left in FIG. 2, the pin s11 fitted in the concave portion v1 of the swing lever V allows
The spindle member S is similarly moved to the left along the guide rod G in FIG.
Can be separated from the nozzle member N.

Conversely, by rotating the swing lever V rightward, the spindle member S is similarly moved rightward, and the fitting portion s2 'of the spindle member S is rotated.
Is fitted to the opening n3 ″ of the nozzle outer frame n3 of the nozzle member N, so that the spindle member S and the nozzle member N can be connected as shown in FIG. At the time of this fitting, a radius is formed at the shoulder s2 ″ of the fitting portion s2 ′ of the spindle support frame s2, and the opening n of the nozzle outer frame n3 is formed.
Since the inclined surface n9 is formed at the 3 ″ side end surface, the shoulder s2 ″ of the fitting portion s2 ′ of the spindle support frame s2 is guided by the inclined surface n9 of the nozzle outer frame n3, and the spindle support frame s2 is formed. Is fitted into the opening n3 ″ of the nozzle outer frame n3, so that the center of the hollow spindle s1 of the spindle member S matches the center of the nozzle n1 of the nozzle member N. It is configured such that the spindle member S can be connected to the member N.

Also, the fitting portion s of the spindle support frame s2
In order to fit 2 ′ into the opening n3 ″ of the nozzle outer frame n3, the swing lever V is rotated rightward, and the spindle member S is moved rightward in FIG. The fitting portion s2 ′ of the spindle support frame s2 is
When the swing lever V is further rotated rightward by a predetermined amount after fitting into the opening n3 ″ of the spindle support frame s
2 is in contact with the nozzle outer frame n3, so that
Although it does not move rightward, the sliding frame s3 further moves rightward so as to compress the compression coil spring s9 disposed between the flange portion s6 and the protrusion s7 of the spindle support frame s2. I do. As described above, by stopping the sliding frame s3 in a state where the compression coil spring s9 is compressed, the spindle support frame s2 is
The nozzle outer frame n3 is always brought into contact with a predetermined contact pressure, so that a gap is formed in the contact surface between the spindle support frame s2 and the nozzle outer frame n3, and troubles such as air leaking from the gap occur. Can be prevented.

E is a fiber introduction member having a fiber introduction hole e1 described later, and a tip portion s1 ″ of a hollow spindle s1 having a hollow passage s1 ′ is formed in a concave portion n10 formed on the front roller d4 side of the nozzle n1. And at a predetermined distance from the tip s1 ″ of the hollow spindle s1.

Reference numeral n11 denotes an air chamber provided in the nozzle member N. The air chamber n11 communicates with a suction duct through a through hole (not shown) provided in the nozzle outer frame n3. The suction duct is connected to an air suction device (not shown), and is configured so that the air chamber n11 is maintained in a weak negative pressure state. By maintaining the air chamber n11 in a weak negative pressure state, floating fibers and the like generated in the hollow chamber n7 during spinning are removed via a gap between the inner peripheral surface of the nozzle n1 and the outer peripheral surface of the hollow spindle s1. It is configured as follows.

Next, a process of producing a spun yarn Y by the spinning unit U from the nozzle member N and the spindle member S described above will be described.

The drafted sliver L sent out from the front roller d4 of the drafting device D is fed into the fiber introduction member E generated by the action of the air ejected from the air ejection hole n8 formed in the nozzle n1. The suction airflow near the hole e1 is sucked into the hollow chamber n7 in the nozzle n1.

The fibers f constituting the sliver L sucked into the hollow chamber n7 are separated from the sliver L by the action of the swirling air flow which is jetted from the air jetting hole n8 and swirling at high speed around the outer periphery of the hollow spindle s1. While being twisted in the direction of the swirling airflow. Also, a part of the false twist twisted by the swirling airflow tends to propagate in the direction of the front roller d4, but the propagation is prevented by the fiber guide surface of the fiber introduction member E described later. The delivered sliver L is not twisted by the false twist. As described above, the false twisted fibers f are sequentially generated in the spun yarn Y, and are sent through the hollow passage s1 ′ of the hollow spindle s1 in the direction of the winding portion W.

Next, the fiber introducing member E will be described with reference to FIG. 3, which is an enlarged exploded perspective view of the fiber introducing member E having the above-described fiber introducing hole e1.

As shown in FIG. 2, the fiber introducing member E has a substantially cylindrical outer frame member e fitted into a cylindrical concave portion n10 formed on the front roller d4 side of the nozzle n1.
2 and a truncated cone are cut in half along the center line, and the fiber guide member e3 is formed by twisting a small diameter with respect to a large diameter side. The inner hole e4 of the outer frame member e2 is formed by the outer frame member e2 shown by hatching in FIG.
As is clear from the cross section of the peripheral wall including the center line of the above, the hole is formed as an inverted truncated cone-shaped through hole. As shown in FIG. 3, the fiber guide member e3 is inserted into the outer frame member e2 from the small diameter portion e5. Therefore, the inner hole e4 of the outer frame member e2
Is occupied by the fiber guide member e3, and the other half forms the fiber introduction hole e1.
In addition, e2 ′ is a cylindrical flange portion having an outer diameter smaller than the outer diameter of the outer frame member e2 and extending to the fiber discharge side of the outer frame member e2.

Next, the shape of the fiber guide surface e6 of the fiber guide member e3 for guiding the fiber f along the swirling suction airflow will be described with reference to FIG.

A fiber guide surface e of a fiber guide member e3 having a shape obtained by cutting and twisting a substantially truncated cone substantially in half along the center line.
Numeral 6 is formed as a surface twisted from the large-diameter side e7 to the small-diameter side e5 of the fiber guide member e3.
It is formed so as to follow the flow of the swirling suction airflow near the fiber introduction hole e1 of the fiber introduction member E generated by the action of the air ejected from the nozzle. The twist angle of the fiber guide surface e6 (the small diameter side e5 based on the cutting line e7 'of the large diameter side e7 when the small diameter side e5 is viewed from the large diameter side e7 of the fiber guide member e3).
Is referred to as the twist angle of the fiber guide surface e6. ) Varies depending on the type of fiber constituting the sliver L, the fiber length, the desired number of twists of the spun yarn Y, the hardness, and the like, but is preferably 80 degrees or more, more preferably 80 to 210 degrees. The twisting direction of the fiber guide surface e6 may be twisted in a direction opposite to the twisting direction shown in FIG. 3 depending on the swirling direction of the swirling suction airflow.

The fibers f conveyed along the fiber guide surface e6 of the fiber guide member e3 by the above-mentioned swirling suction air flow.
By forming the twist angle of the fiber guide surface e6 at a predetermined angle, the convergence of the fiber guide surface e6 is enhanced, and the spun yarn Y having a stronger appearance and improved appearance with improved parallelism of the fiber f is spun. be able to. When the torsion angle of the fiber guide surface e6 is less than 80 degrees, the fibers f are too widely dispersed in the fiber guide surface e6, so that the convergence is poor. Therefore, the parallelism of the fibers f is disturbed. As a result, the strength and appearance of the spun yarn Y are reduced, and the angle of winding of the fiber f spirally wound around the fiber guide surface e6 is small. d4
And propagates to the nip point formed by the bottom roller d4 'and the fiber f sent out from the front roller d4, and it becomes difficult to spun the spun yarn Y.

By increasing the twist angle of the fiber guide surface e6, the convergence of the fiber guide surface e6 is enhanced, and a strong spun yarn Y having improved parallelism of the fiber f can be spun out. Although it is possible to prevent the false twist from propagating in the direction of the front roller d4, depending on the physical properties of the fiber f such as length and hardness, if the twist angle of the fiber guide surface e6 is increased more than necessary, The smooth conveyance of the fiber f along the fiber guide surface e6 is not performed, and it is difficult to effectively spin the spun yarn Y. Therefore, the twist angle of the fiber guide surface e6 depends on the type of the fiber f, humidity, and the like. Is appropriately set theoretically or experimentally.

Next, the behavior of the fiber f introduced from the fiber introduction hole e1 of the fiber introduction member E will be described with reference to FIG. 4 which is an assembled perspective view including a partial cross section of the fiber introduction member E.

The swirling suction airflow in the vicinity of the fiber introduction hole e1 of the fiber introduction member E generated by the action of the swirling airflow formed by the compressed air ejected from the air injection hole n8 is in the same direction as the swirling suction airflow. The large diameter side e7 of the fiber guide member e3
Guide surface e6 twisted toward the smaller diameter side e5 from
Along the length from the large-diameter side e7 of the fiber guide member e3 to the small-diameter side e5.
Flow towards the side. Therefore, the fibers f conveyed on the swirling suction airflow gradually converge from the slightly expanded state on the large diameter side e7 of the fiber guide member e3 along the twisted fiber guide surface e6. While being conveyed and bundled, while being false-twisted through the hollow chamber n7, the spun yarn Y is successively generated in the direction of the winding section W through the hollow passage s1 ′ of the hollow spindle s1. Sent.

As described above, the fiber f conveyed on the swirling suction airflow along the twisted fiber guide surface e6
Is rapidly and reliably bundled, and the bundled fibers f are ballooned by the swirling airflow ejected from the air injection holes n8 at a point away from the fiber guide surface e6. The mixed trash is blown off by centrifugal force, and a spun yarn Y containing no trash is produced. Further, since the needle-shaped guide member is not disposed near the tip s1 ″ of the hollow spindle s1 on the fiber introduction side as in the above-described conventional spinning device, the fiber f traveling toward the hollow passage s1 ′ of the hollow spindle s1 is not provided. Of the fiber f
Can be prevented from being clogged with a trash in the transfer passage of the first embodiment and causing a yarn breakage.

In the spinning apparatus according to the present invention, as described above, it is important that the bundled fibers f be ballooned by the swirling airflow ejected from the air injection holes n8 at a point away from the fiber guide surface e6. Therefore, a gap having a predetermined width needs to be formed between the fiber introducing member E and the distal end portion s1 ″ of the hollow spindle s1 on the fiber introducing side. Tip s
The distance to 1 "is appropriately set theoretically or experimentally depending on the physical properties of the fiber f.

The sliver L used in the spinning apparatus of the present invention described above is arranged such that the sliver L is located between the nip point X of the front roller d4 and the bottom roller d4 'thereof, and the tip s
A long fiber f 'having a fiber length longer than a distance up to 1 "and a short fiber f having a fiber length shorter than the distance from the nip point X of the front roller d4 and its bottom roller d4' to the tip end s1" of the hollow spindle s1. "Are mixed.

From the nip point X between the front roller d4 and its bottom roller d4 ', the tip s of the hollow spindle s1
A mixed fiber f of a long fiber f ′ having a fiber length longer than the distance B up to 1 ″ and a short fiber f ″ having a fiber length shorter than the distance B
Is used for a spinning apparatus provided with a fiber introduction member E having a surface twisted from the large-diameter side e7 to the small-diameter side e5 as described above. FIG. 5 is a partially enlarged perspective view of a member E and the like.
This will be described with reference to FIG.

A long fiber f 'having a fiber length longer than the distance B from the nip point X to the tip end s1 "of the hollow spindle s1' (shown simulated by a solid line in FIG. 5). When the tip is located near the tip s1 ″ of the hollow spindle s1 or when the tip is inserted into the hollow passage s1 ′ of the hollow spindle s1, the other end is connected to the front roller d4 and the bottom roller d4. ′, And the vicinity of the tip s1 ″ of the hollow spindle s1 or the hollow spindle s
The tip of the long fiber f 'inserted into one hollow passage s1' is separated by the swirling airflow at the tip s1 "of the hollow spindle s1.

On the other hand, the short fibers f ″ having a fiber length shorter than the distance B from the nip point X to the tip s1 ″ of the hollow spindle s1 (indicated by a dashed line in FIG. 5). The rider rides on the swirling airflow directed toward the hollow spindle s1 along the fiber guide surface e6 twisted from the large-diameter side e7 of the fiber guide member e3 to the small-diameter side e5 as described above, and the tip s1 of the hollow spindle s1. Is transported to

In this transporting process, the short fiber f ″ is wound around the long fiber f ′ so as to be sandwiched by the separated long fiber f ′.
The spun yarn Y is generated by twisting the short fibers f ″ distributed substantially uniformly around the outer periphery of the tip s1 ″ of the hollow spindle s1. Therefore, the spun yarn Y thus produced has a structure in which the short fibers f "are sandwiched between the long fibers f 'and the short fibers f" are wound around the long fibers f'.

Next, another embodiment of the fiber introducing member E will be described with reference to FIG. 6 which is a vertical sectional view taken along the center line of the fiber introducing member E.

In this embodiment, the flange e2 'is provided on the inner surface of the flange e2' extending on the fiber discharge side of the outer frame member e2.
The taper e2 "is expanded toward the end of the fiber e2". By forming such a taper e2 ", a vortex does not occur in the airflow flowing out from the fiber introduction hole e1, and therefore, the fiber f Flows smoothly along the taper e2 ″, and the fiber f is not disturbed.
Loss of the fiber f can be prevented.

[0041]

Since the present invention is configured as described above, it has the following effects.

The fibers conveyed on the swirling suction airflow along the twisted fiber guide surface of the fiber introduction member are quickly and reliably bundled, and the bundled fibers are bundled with the fiber guide surface. Since the balloon is ballooned by the swirling airflow at a point away from the fiber, the trash mixed in the fiber is blown off by centrifugal force, and a spun yarn containing no trash can be manufactured.

Further, unlike the conventional spinning device, since the needle-shaped guide member is not disposed near the tip of the hollow spindle on the fiber introduction side, the fiber transport passage toward the hollow passage of the hollow spindle becomes wider. Therefore, it is possible to prevent the trash from being clogged in such a fiber transport path and to cause yarn breakage, thereby improving spinning properties.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a spinning device to which the present invention is applied.

FIG. 2 is a vertical sectional view of an example spinning unit.

FIG. 3 is an enlarged exploded perspective view of the fiber introduction member.

FIG. 4 is an assembled perspective view of the fiber introducing member including a partial cross section.

FIG. 5 is a partially enlarged perspective view of a fiber introduction member and the like.

FIG. 6 is a vertical sectional view taken along a center line of a fiber introduction member according to another embodiment.

[Explanation of symbols]

 E: Fiber introduction member G: Guide rod L: Sliver N: Nozzle member S: Spindle member U: Spinning unit Y: ··· Spun yarn d4 ··· Front roller e1 ··· Fiber introduction hole e3 ··· Fiber guide member e6 ··· Fiber guide surface n1 ··· Nozzle s1 ··· Hollow spindle

Continuation of front page (58) Field surveyed (Int. Cl. ⁶ , DB name) D01H 1/00-17/02

Claims (3)

(57) [Claims] 1. A spinning apparatus having a nozzle for applying a swirling airflow to a fiber and a hollow spindle, wherein a fiber having a fiber guide surface twisted in a swirling direction of suction air is provided near a tip of the hollow spindle on a fiber introduction side. disposed introduction member, provided
The fed fiber is transported along the twisted fiber guide surface.
It said spinning device, characterized in that it is. 2. The spinning apparatus according to claim 1, wherein the twist angle of the fiber guide surface of the fiber introduction member is 80 degrees or more. 3. The spinning apparatus according to claim 1, wherein a gap is formed between the fiber introduction member and a tip of the hollow spindle on the fiber introduction side.