JP3003595B2 - Method and apparatus for winding a yarn in a false twisting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn winding method and apparatus in a false twisting machine for winding a yarn on a bobbin supported at both ends by a bobbin holder while traversing the yarn.

[0002]

2. Description of the Related Art Conventionally, when winding a yarn on an empty bobbin supported at both ends by a bobbin holder, the yarn is hooked on a flange provided with a cutout provided in one bobbin holder, A yarn winding method in a false twisting machine in which a yarn layer is formed on an empty bobbin while traversing the yarn, and then the full package is removed from the bobbin holder by expanding the bobbin holder, and the method. Devices are known.

[0003]

Problems to be solved by the present invention will be described with reference to FIG. 9 which is a schematic side view of a false twisting machine as an example.

Reference numeral c1 denotes a creel stand. A thread c3 drawn from a yarn supply package c2 supported by a large number of creel stands c1 is introduced into a first feed roller c5 via an appropriate guide c4. Thereafter, the thread c3 is
The first heater device H1 is guided by appropriate guides c6 and c7 disposed on the yarn introduction side of the first heater device H1.
Is inserted through. The yarn c3 that has left the first heater device H1
Enters the cooling plate c8, is then twisted by the false twisting member c9, and then, through a suitable guide c10,
It is introduced into the second feed roller c11. The yarn c3 coming out of the second feed roller c11 is supplied to the second heater device H2, the guide c12, the third feed roller c13,
Oiling roller and guide c1 not shown
After passing through c4 and c15, it is wound on a winding package c17 which is in contact with the friction roller c16 and is rotationally driven.

As described above, in the false twisting machine, the first feed roller c5, the second feed roller c11, the third feed roller c11
A feed roller 13 or the like is provided to actively feed the yarn c3 at a predetermined yarn speed. Therefore, after the winding package c17 is full, when the end of the bobbin having a smaller diameter than the full package is wound and an attempt is made to wind a bunch, the winding speed is sharply reduced, and a predetermined speed is set by the feed roller. Is loosened between the full package and the third feed roller c13, and is wound around the friction roller c16, the machine base, or the like, so that the winding end bunch cannot be formed.

As described above, if the end-of-winding bunch is not formed, the yarn end hangs down from the full package, and the hanging yarn end becomes entangled with a machine or the like while the full package is being transported, or the full package is not wrapped. There is a problem that the hanging yarn ends are entangled with each other. Further, in the next step, when the yarn end is pulled out from the full package, the position of the yarn end on the full package is not constant, so that there is a problem that the success rate of the yarn end tapping is poor.

An object of the present invention is to solve the problems of the above-described conventional yarn winding method and apparatus in the false twisting machine.

[0008]

According to the present invention, in order to achieve the above-mentioned object, first, after a full package is formed on a bobbin, a yarn is removed from a traverse guide, and
Later, when it is wound on the package, it is wound on the bobbin
In order to absorb the slack of the yarn due to the speed difference at the time of
In the state where suction is acting on the yarn while sucking
Move the yarn to the bobbin end to form a full package
To form a bunch at the end of the bobbin
Then, the yarn connected to the full package is cut . Second, a hand for removing the yarn from the traverse guide is used.
The step and the hand that sucks and holds the yarn removed from the traverse guide
A suction force is applied by the step and means for sucking and holding the yarn.
Means for moving the wound yarn to the bobbin end, and
After the bunch is formed, a cutter for cutting the yarn is provided.
It is a thing.

An embodiment of the present invention will be described below with reference to the drawings, but the present invention is not limited to the embodiment unless it departs from the gist of the present invention.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 denotes a cradle arm having a rotatable bobbin holder 2 fitted to the open end of a bobbin B at its tip. Reference numeral 3 denotes a friction roller for rotating the bobbin B in contact with the bobbin B supported by the cradle arm 1, and reference numeral 4a denotes a traverse guide of the traverse device 4 for traversing the yarn. . The bobbin B supported by the cradle arm 1 is brought into contact with the friction roller 3 and rotated, and the yarn is traversed by the traverse guide 4a of the traverse device 4 to form the package P on the bobbin B. . When the package P is full, the cradle arm 1 is widened to doff the full package P. In the present embodiment, at the beginning of winding, the traverse guide 4a is traversed with the maximum traverse width Ta, and thereafter, the traverse width is gradually reduced to a predetermined traverse width. As shown by a two-dot chain line, an example of forming a pineapple-shaped full package P is shown.

When starting to wind a thread around an empty bobbin B supported by the cradle arm 1, first, the thread is threaded around the empty bobbin B, and Start winding near the end to form a bunch. Thereafter, the yarn is traversed by the traverse guide 4a to form the package P on the bobbin B. Then, before the full package P is formed and the full package P is doffed, a winding end bunch is formed near the end of the bobbin B opposite to the winding start bunch. After the winding end bunch is formed, the full package P is doffed, the cradle arm 1 newly supports an empty bobbin, and the above-described yarn winding is repeated.

The means for forming the above-mentioned winding start bunch and winding end bunch will be described below. In this embodiment, a case where a winding start bunch is formed near the right end of the bobbin B and a winding end bunch is formed near the left end of the bobbin B in FIG.

Reference numerals 5 and 6 denote disk-shaped flanges attached at predetermined intervals to the peripheral surface of the bobbin holder 2 located on the right side. The flanges 5 located on the bobbin B side (hereinafter simply referred to as Bobbin holder 2 (bobbin B)
In the rotation direction, two thread hooks 5a which are notched in a wedge shape are provided at 180 ° intervals, and the deepest portion of the thread hook 5a reaches the peripheral surface of the bobbin holder 2. ing.

A flange (hereinafter, simply referred to as an “outer flange”) 6 located on the cradle arm 1 side has a yarn hooking portion 5 a formed on the inner flange 5 and a rearward in the rotation direction of the bobbin holder 2. Two thread hooks 6a which are cut out by being shifted by a predetermined phase (θ) are provided at intervals of 180 degrees,
The threading portion 6a is formed to be sufficiently shallow as far as the threading can be performed. Also, the fixed blade 8 is positioned so that the cutting edge is positioned in a circumferential groove 7 formed between the inner flange 5 and the outer flange 6.
Is attached to the cradle arm 1.

Reference numeral 9 denotes a bobbin holder 2 on the right side in FIG. 1 where the inner flange 5 and the outer flange 6 are attached.
The thread hook arm 9 is rotatably disposed, and has two arm-shaped thread locking portions 9 a and 9 b at the tip of the thread hook arm 9.
Are arranged. In this embodiment, an arm 9c having two arm-shaped thread locking portions 9a and 9b is formed.
It is formed separately from the threading arm 9 and has an arm 9
c, a slit 9d is formed, and a bolt 9 is formed in the slit 9d.
The arm portion 9c is attached to the thread hook arm 9 by inserting e. Note that 9f
Is a pin attached to the threading arm 9, and the arm portion 9c
, And is configured to prevent the arm portion 9c from rotating with respect to the thread hook arm 9. In the following, the entirety including the arm portion 9c is referred to as a thread hook arm 9.

The threading arm 9 is attached to an output shaft of a rotary actuator 11 attached to a bracket 10. The thread hooking arm 9 has the thread locking portions 9a and 9b positioned near the inner flange 5 and the outer flange 6 attached to the bobbin holder 2 by the operation of the rotary actuator 11, as shown by a solid line in FIG. And the threading arm 9 positioned at the threading position is approximately 18
It is configured to be able to reciprocate between a standby position shown by a two-dot chain line in FIG. Reference numerals 10a and 10b denote stop pins protruding from the bracket 10. When the threading arm 9 rotates from the standby position to the threading position, the threading arm 9 comes into contact with one of the stop pins 10a. When the thread hook arm 9 rotates from the thread hooking position to the standby position, the thread hook arm 9 comes into contact with the other stop pin 10b, and further rotation is prevented. ing.

The two thread locking portions 9a and 9b are formed by bending the tip of the thread hook arm 9 downward by approximately 90 degrees, and the tip of the thread hooking arm 9 is opposed to each other so as to face each other. And hooks 9a 'and 9b' are formed. As shown in FIG. 3, in a state where the thread hook arm 9 is at the thread hooking position, the thread locking portion 9 a located on the bobbin B side is
At a position that does not exceed the inner flange 5, and is arranged so that the rotation locus of the thread locking portion 9a intersects the inner flange 5 and the outer flange 6. The other thread engaging portion 9b is configured to be disposed over the inner flange 5 and the outer flange 6 and close to the outer flange 6 in a state where the thread hook arm 9 is at the thread hooking position. ing.

Reference numeral 12 denotes an oscillating plate disposed below the traverse surface of the yarn Y. The oscillating plate 12 is formed wider than the maximum traverse width Ta. A support plate 12b whose center is pivotally attached to a shaft 12a is hung on the lower surface of an end of the swing plate 12 opposite to the yarn running direction, and an end of the support plate 12b A reciprocating rod 12c is pivotally supported by a suitable means such as a cam means. The yarn Y1 engaged with the traverse guide 4a and in the traverse state (FIG. 2)
The pivot plate 12 in the lower standby position in FIG.
2 is moved to the left in FIG. 2, and the swinging plate 12 is rotated clockwise about the shaft 12a, whereby a part of the tip is shown in FIG. The yarn Y1 engaged with the traversing guide 4a is lifted and rotated to a position where it is removed from the traversing guide 4a.

The swinging plate 12 has a horizontally long window portion 12d extending in the traversing direction over a length exceeding the maximum traversing width Ta. Reference numeral 13 denotes a suction hole 13a fitted to the window 12d and movable along the window 12d.
The suction block 13 is attached to the swing plate 12 by fitting the edge of the swing plate 12 on the side of the window 12 d into a groove 13 b formed on the opposite side wall of the suction block 13. It is slidably mounted. The suction block 13 is connected to a pipe 13c connected to an air suction source (not shown). As an example, the suction block 1 is pivotally attached to the suction block 13 and the rod 13d is swung by a suitable means such as a cam means (not shown) to thereby rotate the suction block 1.
3 is configured to slide along the window 12 d of the swing plate 12. In the suction block 13, an engagement pin 13e that is perpendicular to the running direction of the yarn Y with respect to the suction hole 13a is provided upright.

Reference numeral 14 denotes a cutter which is attached to the swing plate 12 located on the bobbin B side with respect to the window 12d, adjacent to the window 12d formed in the swing plate 12. The cutter 14 is disposed at the end of the window 12d opposite to the bobbin holder 2 to which the threading arm 9, the inner flange 5, and the outer flange 6 are attached, and outside the maximum traverse width Ta. Has been established. The cutting edge of the cutter 14 is located at the center of the swing plate 12. Note that 15
Is a yarn guide rod disposed on the side opposite to the yarn traveling direction with respect to the swinging plate 12.

Next, the steps of forming the winding start bunch and the winding end bunch in the yarn winding device having the above-described configuration will be described.

In a normal yarn winding step in which the yarn Y engaged with the traversing guide 4a and wound on the bobbin B is wound, in the normal winding process of the yarn, the yarn hooking arm 9 is mounted as shown in FIG. At the standby position indicated by the two-dot chain line,
The suction block 13 is located at one end of a window 12d formed in the swing plate 12 so as not to contact the traversed yarn Y. In this embodiment, the suction block 13 is, as shown in FIG.
It is located at the right end of the window 12 d formed in the swing plate 12.

FIG. 5 shows that the yarn Y engaged and traversed by the traversing guide 4a traversed with the maximum traversing width Ta is wound around the bobbin B to form a pineapple-shaped full yarn. The state where the tube package P is formed is shown.

When the full package P is formed,
In order to avoid contact with the yarn Y in the traversing state, in FIG.
traverse guide 4a by rotating clockwise around a.
Lift the yarn Y1 engaged with the traverse guide 4
Remove from a.

Next, the suction block 13 located at the right end of the window 12d formed in the swinging plate 12 is moved leftward along the window 12d, that is, the inner flange 5 and the outer flange 6 are removed. When the suction block 13 is moved in the direction of the bobbin holder 2 located on the opposite side to the
In the leftward moving step, the yarn Y which is disengaged from the traverse guide 4a and is located substantially at the center of the traverse width is
While being hooked on the engaging pin 13e of the suction block 13, it is sucked in a loop into the suction hole 13a. At this time, since the engagement pin 13e is erected on the suction block 13, the yarn Y is securely hooked on the suction block 13,
The yarn Y can be suction-held in the suction hole 13a. Thereafter, the suction block 13 that has suctioned the yarn Y is moved to the end of the bobbin B where the yarn layer is not formed as shown in FIG.
Is formed.

At the same time as the above-mentioned movement of the suction block 13, a shutter (not shown) is changed from a closed state to an open state to generate a suction air flow near the suction hole 13a. When the yarn Y is on the surface of the package P, it is not sucked into the suction hole 13a. However, when the yarn Y moves from the package P to the end of the bobbin B due to the formation of the winding end bunch. Or
It is configured such that the slack of the yarn caused by the difference in speed between the time when the yarn is wound on the package P and the time when the yarn is wound on the bobbin B in the middle thereof can be completely absorbed.

After the winding end bunch b1 is formed at the end of the bobbin B, as shown in FIG. 7, the suction block 13 is moved to the left, that is, the inner flange 5 and the outer flange 6 are attached. When the yarn Y is moved in the direction of the bobbin holder 2 located on the opposite side to the bobbin holder 2, the yarn Y sucked by the suction block 13 is cut by the cutter 14 attached to the swing plate 12. The yarn Y on the full package P side cut by the cutter 14 is wound around the end of the bobbin B, and the yarn Y on the suction block 13, ie,
The yarn Y on the yarn supply side is sucked and held in the suction hole 13a of the suction block 13.

The movement of the suction block 13 to the end of the bobbin B for forming the winding end bunch b1 as shown in FIG. 6 and the yarn Y as shown in FIG.
Suction block 13 up to the cutting position by the cutter 14
Is performed continuously, but if necessary, the suction block 13 is temporarily stopped at the position where the winding end bunch b1 is formed, and then moved to the yarn Y cutting position shown in FIG. It can also be configured to move. In addition,
The cutter 14 can be configured by a heat cutter instead of a blade. By using a heat cutter, it is possible to reliably cut the yarn Y having a reduced tension.

Thereafter, the space between the cradle arms 1 is widened, the full package P is doffed, and the empty bobbin B is newly gripped by the cradle arm 1 and brought into contact with the friction roller 3 to rotate the empty bobbin B. Let it.

Before and after the above-described doffing operation of the full package P, the suction block 13 is moved toward the bobbin holder 2 to which the inner flange 5 and the outer flange 6 are attached, as shown in FIG. As shown in FIG. 1, while the thread hook arm 9 at the standby position shown by the two-dot chain line rotates to the thread hook position shown by the solid line,
The thread Y is moved to a position where the thread Y is engaged with the hooks 9a 'and 9b' of the a and 9b.

Next, when the thread hooking arm 9 is rotated from the standby position shown by the two-dot chain line in FIG. 1 in the direction of the thread hooking position shown by the solid line, the suction hole 13a of the suction block 13 is rotated. The yarn Y sucked and held by the hooks 9a 'of the yarn hooking portions 9a approaching the inner flange 5 is locked, and as shown in FIG. 6 and is locked by the hook 9b 'of the thread locking portion 9b of the thread hook arm 9 arranged close to the outer flange 6.
When the bobbin holder 2 is rotated from this state, the thread Y stretched between the thread engaging portion 9a and the thread engaging portion 9b of the thread hooking arm 9 becomes the thread hook formed on the inner flange 5. The hook 5 is hooked on the portion 5a, is pulled to the deepest portion of the thread hooking portion 5a, and is held between the inner flange 5 and the end surface of the bobbin B.

In parallel with this, a thread Y stretched between the thread engaging portion 9a and the thread engaging portion 9b of the thread hook arm 9 is formed between the inner flange 5 and the outer flange 6. The cutting edge is cut by the fixed blade 8 whose cutting edge is located in the circumferential groove 7, and the cut yarn end is sucked by the suction block 13 and removed.

Thereafter, the thread hook arm 9 stops at the above-described thread hook position for a predetermined time, and forms a winding start bunch b2 at the end of the bobbin B. After the winding start bunch b2 having a predetermined number of windings is formed, the thread hook arm 9 is moved to the position shown in FIG.
Is rotated from the thread hooking position shown by the solid line to the standby position shown by the two-dot chain line.
Is disengaged from the thread locking portions 9a and 9b of the thread hook arm 9.
In this state, since the swing play 12 has already been returned to the lower standby position in FIG. 2, the thread Y that has been disengaged from the thread engaging portions 9 a and 9 b of the thread hook arm 9 and has descended.
Is engaged with the reciprocating traverse guide 4a, and the process proceeds to a normal winding process. Before the yarn Y is engaged with the traversing guide 4a, the suction block 13 is moved to the right end of the window portion 12d of the swing plate 12, so that the suction block 13 does not contact the traversing yarn Y. It is configured.

As described above, the yarn Y is hooked on the empty bobbin B, and the winding start bunch b2 is formed near the end of the empty bobbin B. Thereafter, when the full package P is formed, prior to the doffing operation of the full package P, the winding end bunch b1 is formed near the end of the bobbin B opposite to the winding start bunch b2. In this way, the winding start bunch b2 and the winding end bunch b1 are formed.

In the above-described embodiment, an example is shown in which the suction block 13 is fitted to the window 12d formed in the swing plate 12, but the suction block 13 is independent of the swing plate 12. , The oscillating plate 12 is disposed on the opposite side to the yarn running direction.
May be omitted.

[0036]

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

Since the winding end bunch is formed, the yarn end from the full package can be prevented from hanging down.
It is possible to solve the problem that the yarn ends are entangled with the machine base or the like during the transportation of the full package, or the hanging yarn ends of the full packages are entangled with each other.

[0038] Since the winding end bunch is formed while applying a suction force to the yarn between the feed roller and the package, the slack of the yarn caused by the difference in winding speed can be absorbed. In addition, it is possible to prevent the slack yarn from being wound around the friction roller, the machine base, or the like, thereby preventing the formation of the winding-end bunch.

The winding end bunch and the winding start bunch are
Since a common member such as a suction block is used, the structure of the apparatus can be simplified.

Since the formation of the winding end bunch and the cutting of the yarn are performed by the continuous movement of the common member, there is no need to separately provide a formation mechanism of the winding end bunch and a yarn cutting mechanism. Can be simplified.

Since the winding end bunch is formed at the end of the bobbin, the yarn end is located at a fixed position at the end of the bobbin, so that the success rate of the operation of drawing the yarn end in the next step is improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a yarn winding device in a false twisting machine according to the present invention.

FIG. 2 is a side view including a partial cross section of a yarn winding device in the false twisting machine of the present invention.

FIG. 3 is a perspective view of an essential part for explaining the yarn hooking of the yarn winding device in the false twisting machine according to the present invention.

FIG. 4 is a side view of an essential part for explaining the yarn hooking of the yarn winding device in the false twisting machine according to the present invention.

FIG. 5 is a schematic plan view for explaining formation of a winding end bunch of the yarn winding device in the false twisting machine of the present invention.

FIG. 6 is a schematic plan view similar to FIG. 5;

FIG. 7 is a schematic plan view similar to FIG. 5;

FIG. 8 is a schematic plan view similar to FIG. 5;

FIG. 9 is a schematic side view of a false twisting machine as an example.

[Explanation of symbols]

 B ... bobbin b1 ... winding end bunch b2 ... winding start bunch 1 ... cradle arm 2 ... bobbin holder 4a・ ・ ・ ・ ・ ・ Traverse guide 5 ・ ・ ・ ・ ・ ・ ・ Inner flange 6 ・ ・ ・ ・ ・ ・ ・ Outer flange 9 ・ ・ ・ ・ ・ ・ ・ Threading arm 12 ・ ・ ・ ・ ・ ・ Swing plate 13 Suction block 14 Cutter

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 54/00-54/553 B65H 59/10, 65/00

Claims (2)

(57) [Claims] 1. After a full package is formed on a bobbin,
Remove the thread from the traverse guide, and then wind it into a package.
And the speed difference between when it is wound around the bobbin
In order to absorb the slack of the yarn, the yarn that is removed from the traversing guide and connected to the full package is sucked,
The yarn in a state where the suction force is acting on the yarn by moving the bobbin end forms a bunch winding end <br/> the bobbin end full package is formed, then, full package To
A method for winding a yarn in a false twisting machine, comprising cutting a continuous yarn . 2. A traverse means for removing a thread from a traverse guide.
Means for sucking and holding the yarn removed from the thread guide, and the yarn
A yarn to which a suction force is applied by means for sucking and holding the strip
Means for moving the strip to the end of the bobbin, and a bunch at the end of winding
After forming, a cutter for cutting the yarn is provided.
A yarn winding device in a false twisting machine.