JPH0339949B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention rotatably supports a plurality of yarn winding bobbins, and is rotatable so as to take a standby position and a normal winding position. The present invention relates to a method for threading a thread on a revolving automatic winder that continuously winds a thread, comprising a turret and a contact roller that comes into contact with a thread winding bobbin in a normal winding position, and an apparatus for carrying out the method. .

[Problems with conventional technology]

Conventionally, when threading a revolving type automatic winder at the start of operation, if the thread is taken up by a suction means and the thread is being wound around a contact roller, the thread is wound around the contact roller and the revolving type automatic winder cannot smoothly thread the thread. There was a problem that it could not be done.

As a result of studies aimed at solving such problems, the present inventor found that the contact roller contact angle (wrapping angle) of the yarn is large during threading, so the yarn is likely to be wound up by the contact roller. .

As a method of preventing the yarn from being wound up on the contact roller in this manner, a method can be considered that increases the suction force of a yarn suction device to suction the yarn without being wound up on the contact roller.

However, recently, the yarn winding speed has become
The speed reaches a high speed of over 4000 m/min, and the ability of the suction device is insufficient to reliably suction the yarn traveling at such high speed.

Therefore, conventionally, it has not been possible to smoothly and reliably thread the thread in a revolving type automatic winder that winds the thread at a high speed of 4000 m/min or more.

[Purpose of the invention]

The present invention solves the above-mentioned problems of the prior art and provides a method and device capable of reliably and smoothly threading at startup in a revolving type automatic winder with a winding speed of 4000 m/min or more. With the goal.

[Structure of the invention]

According to the present invention, a turret rotatably supports a plurality of yarn winding bobbins and is rotatable in a direction opposite to the rotational direction of the winding bobbins, and a contact that is pressed against the winding bobbin at a normal winding position. In a revolving type automatic winder, the turret is rotated in a direction opposite to the rotational direction of the yarn winding bobbin to continuously wind the yarn. The rotation is temporarily stopped and the yarn winding bobbin is pressed against the contact roller, and the extension line of the tangent between the bobbin and the contact roller in the pressed state and the extension of the tangent between the bobbin and the contact roller at the normal winding position are After positioning the threading guide member within the area surrounded by the line, the turret is rotated in a direction opposite to the rotating direction of the thread winding bobbin to thread the thread on the thread winding bobbin, and further There is provided a thread threading method in a revolving type automatic winder, characterized in that the turret is rotated in the above direction to position the winding bobbin at a normal winding position and wind the yarn.

Further, according to the present invention, a plurality of yarn winding bobbins are rotatably supported, and the rotation direction of the yarn winding bobbins is adjusted so that the yarn winding bobbins take a standby position and a normal winding position. It consists of a turret that can rotate in the opposite direction and a contact roller that contacts the yarn winding bobbin in the normal winding position.
In the revolving automatic winder, the turret is rotated in a direction opposite to the rotational direction of the yarn winding bobbin to continuously wind the yarn, and the turret is rotated in a direction opposite to the rotational direction of the yarn winding bobbin. Rotation in the opposite direction can be temporarily stopped, and when the rotation is stopped, the contact roller can be pressed against the yarn winding bobbin of the turret, and an extension line of the tangent between the bobbin and the contact roller in the pressed state is The present invention is also characterized by providing a threading guide member that is movable within a threading area surrounded by an extension of the tangent between the bobbin and the contact roller at the normal winding position and between a standby position outside the threading area. A revolving automatic winder is provided.

[Explanation of Examples]

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, which illustrate embodiments of the invention.

1 and 2 show front views of a spindle-driven tandem type revolving automatic winder according to the present invention.

In FIGS. 1 and 2, two slide shafts 2 extending vertically are fixed to a machine frame 1.
A slide block 3 moves up and down along the slide shaft 2 by a slide bearing (not shown). A traverse box 5 is protruded from the slide block 3 and has a contact roller 6 and a large number (four in the embodiment) of traverse guides 4 for traversing the yarn within the traverse area.

The contact roller 6 is rotatably supported by a bearing 7a (FIG. 4) attached to the case 7. The contact roller 6 rotates in contact with the winding bobbin B. In a circumferential speed control type spindle winding machine, for example, as shown in FIG. 4, a gear 64 is attached to the base of the contact roller 6, and The teeth of the gear 64 are detected by a pick-up 65, and the winding speed is controlled in accordance with the detection signal so that the yarn take-up speed is constant. In addition, in a tension control type spindle winding machine, the winding thickness of the yarn layer formed on the bobbin is used as a parameter, and the yarn tension detected by a tension detector (not shown) is controlled so that it reaches a predetermined value. do.

A bracket 40 is fixed to the machine frame 1 as shown in FIGS. 1 to 3, and a rotary actuator 42 is attached to the tip of the bracket 40.
A threading arm 41 is swingably supported on the machine frame 1,
A threading arm 41 is connected to the rotary actuator 42. A threading bar 43 is attached to the tip of the threading arm 41, and the threading bar 4
3, as shown in Figure 3 (in Figure 3, there are 4
threading guides 44 are provided at equal intervals.
By operating the rotary actuator 42, the threading guide 44 provided at the tip of the threading arm 41 can swing between the standby position shown in FIG. 1 and the threading position shown in FIG. be.

The threading guide 44 in the threading position shown in FIG. 2 is within the area surrounded by lines a and b (the shaded area in FIG. 2). Line a is
As will be described later, when the rotation of the turret 12 is temporarily stopped during the threading operation and the bobbin B and the contact roller 6 are brought into pressure contact as shown by the solid line in FIG. It is an extension of the tangent line. The line b is an extension of the tangent on the thread passing side between the bobbin B at the normal winding position and the contact roller 6 (indicated by a broken line).

A thread removal guide 9 extending in the traverse direction of the traverse guide 4 is swingably supported on the upper part of the traverse box 5 by a pin 8. The tip of the rod 10a of the swing cylinder 10 is connected to the thread removal guide 9, and the rear end of the swing cylinder 10 is pin-engaged with the upper part of the traverse box 5. When the rod 10a protrudes, the thread removal guide 9 swings to intersect the thread path of the thread Y, as shown in FIG. 2, and the running thread Y is separated from the traverse guide 4.

The bunch guide 11 is located facing the yarn removal guide 9 while sandwiching the yarn Y, and the bunch moving cylinder 1
8, the bunch guide 11 is movable along the traverse direction by the traverse guide 4.
One U-shaped recess 11a in each traverse area of
(Figure 3).

Above the slide block 3 is a bracket 4.
7 protrudes, and a large number (four in FIG. 3) of thread distribution guides 48 are attached to the bracket 47 at equal intervals.

As shown in FIG. 5, the turret 12 is
It is rotatably supported around 2a. Bobbin holders 13, 13' are rotatably protruded from the turret 12. The bobbin B has a suitable thread locking means, such as a thread threading groove S having a U-shaped cross section, which is circumferentially bored in the circumferential surface near the end face of the bobbin B. Four bobbins B are attached to each of the bobbin holders 13 and 13'.

A pair of positioning recesses (not shown) are bored in the circumferential surface of the turret 12 at symmetrical positions with respect to the support shaft 12a. Further, the machine frame 1 is provided with a cylinder (not shown) for advancing and retracting a positioning pin (not shown) that fits into the recess.

The main cylinder (not shown) is connected to the conduit (not shown)
The slide block 3 is supported by pushing up a rod (not shown) by pressure fluid supplied through the rod. The pressure fluid is applied to the slide against the total weight of the slide block 3 carrying the traverse guide 4, traverse box 5 and contact roller 6, and the friction force generated when the slide block 3 slides along the slide shaft 2. A control valve controls the block 3 so that it is pushed upward with a predetermined force depending on the winding thickness of the yarn layer formed on the bobbin.

As shown in FIG. 5, the support shaft 12 of the turret 12
A pulley 25 is attached to a, and a belt 27 is stretched between the pulley 25 and the output shaft 26a of the electric motor 26 for rotating the turret, so that the electric motor 26 for rotating the turret can rotate the turret 12. .

In FIG. 5, the rotation guide 28 is arranged 2 times in the circumferential direction
It consists of two semicircular parts that can be divided,
While fitting into the circumferential surface of the turret 12, the rotation guide 28 is attached to the machine frame 1, and a cam groove 28a is formed on the inner circumferential surface thereof.

A sliding cylinder 29 of a bobbin holder 13, 13' is mounted in a bobbin holder mounting hole 12c formed in the turret 12 so as to be slidable in the axial direction. A pin 31 is screwed onto the sliding cylinder 29, and the cam groove 2
A cam follower 30 fitted into the shaft 8a is pivotally supported. As the turret 12 rotates, the cam groove 28a cooperates with the cam follower 30 to move the bobbin holder 13 or 13' in the axial direction toward the turret 12, and then returns it to its original position.

In addition, bearings 32 and 3 are provided in the center hole of the sliding cylinder 29.
The shaft 34 is inserted through the shaft 2 through the shaft 2. A head 35 for mounting the bobbin B is attached to the tip of the shaft 34, and an output shaft of a spindle drive motor 36 is connected to the rear end.

Next, the threading method of the present invention will be explained based on FIGS. 1 and 2.

The threading arm 41 is brought into the state shown in FIG. In this state, a push button (not shown) is pressed to remove the positioning pin from the recess of the turret 12 using the cylinder, and the electric motor 26 for rotating the turret moves the turret 12 in the direction of arrow T in FIG. (in the opposite direction to the rotational direction of the bobbin holder 13), the bobbin holder 13 is brought into pressure contact with the contact roller 6, and the turret 1
Stop rotation of 2.

Next, start the spindle drive motor 36,
Rotate the bobbin holder 13. In addition, the rotary actuator 42 is operated to
1 is rotated from the state shown in FIG. 1 to the state shown in FIG. Furthermore, the swing cylinder 10 provided above the traverse box 5 is operated to swing the thread removal guide 9 toward the contact roller 6 side.

In this state, while suctioning the yarn Y with the suction gun 45, thread it through the thread distribution guide 48 above the traverse box 5, then pass it between the contact roller 6 and the thread removal guide 9, and then Thread the thread through the threading guide 44 provided on the threading bar 43.

At this time, the threading guide 44 is attached to the turret 12.
It is within an area surrounded by an extension line a of the tangent between the bobbin B and the contact roller 6, which have stopped rotating and are in a press-contact state, and an extension line b of the tangent between the bobbin B and the contact roller 6 in the normal winding position. Therefore, the contact angle between the yarn being attracted by the suction gun 45 and the contact roller 6 is small, and the yarn Y is not wound up by the contact roller 6.

When the yarn is threaded onto the threading guide 44 as described above, a push button (not shown) is pressed. Then,
The bunch guide 11 swings in the direction of the traverse box 5 by the bunch guide swing cylinder 18,
The yarn Y is fixed in a U-shaped recess 11a formed in the bunch guide 11.

Next, when the turret 12 is again rotated in the direction of arrow T by the turret rotation electric motor 26, the bobbin holder 13 is rotated together with the turret 12. As the turret 12 rotates, the cam follower 30 provided on the bobbin holder 13 and the cam groove 28a formed on the cam 28 engage with each other, and the bobbin holder 13 with the empty bobbin attached moves axially toward the outside of the machine (the arrow in FIG. 3). move in the opposite direction to A). At the same time, the bunch guide 11 is moved in the direction of the arrow in FIG. 3 by a bunch guide moving cylinder (not shown) while holding the yarn Y in the U-shaped recess 11a.
Return to original position. By this movement of the bobbin holder 13 and bunch guide 11, the bobbin holder 1
A transfer tail (commonly known as a pigtail) is formed on the empty bobbin B attached to No. 3.

Even while the turret 12 is rotating, the contact angle (wrapping angle) of the yarn being attracted to the suction gun 45 on the contact roller 6 is small, and therefore,
The yarn Y is prevented from being wound around the contact roller 6.

Furthermore, before and after the bobbin holder 13 reaches the normal winding position, the thread removal guide 9 is returned to its original position by the swing cylinder 10, and the bunch guide 11 is returned to its original position by the bunch guide swing cylinder 18. . As a result, the yarn is released from the yarn removal guide 9 and bunch guide 11, captured by the traverse guide 4, and traversed.

Next, the threading arm 41 is returned to the state shown in FIG. 1 by the rotary actuator 42, and normal winding is started.

[Other embodiments]

In the above explanation, a spindle drive type automatic winder has been described, but the present invention can also be implemented in a friction drive type automatic winder.
Accordingly, the term contact roller herein includes contact rollers of spindle-driven automatic winders and friction rollers of friction-driven automatic winders.

Further, in the above-described embodiment, the threading guide was fixed to the threading bar provided at the tip of the threading arm, but the threading guide may be moved toward the front side when threading.

〔Effect of the invention〕

In the conventional device, after the thread is threaded at the temporary stop position, the bobbin holder and friction roller are in contact with each other.
The yarn being wound onto the take-up bobbin pushes the friction roller upwards, and in this state the bobbin holder is moved in the opposite direction to the traverse guide. There was a problem in that the large pressing force of the friction roller was applied for a relatively long period of time, causing dyeing spots and fuzz on the yarn on the bobbin.

On the other hand, in the present invention, the threading guide member is located within the threading area, and after threading the thread on the thread winding bobbin halfway between the temporary stop position and the normal winding position, Since the take-up bobbin is further rotated in the direction opposite to the rotational direction of the yarn take-up bobbin and positioned at the normal winding position, in the present invention,
Unlike conventional devices, the winding bobbin is not moved from the circumferential surface of the friction roller on the traverse guide side to the circumferential surface of the friction roller on the opposite side of the traverse guide.

Therefore, in the present invention, since the pressing force by the contact roller acts only for a very short time, the problems associated with the above-mentioned conventional device do not occur, and the yarn does not become dyed or fluffed.

According to the present invention, when threading on the threading guide, the threading guide is connected to the extension line a of the tangent between the bobbin and the contact roller in a press-contact state, and the extension of the tangent between the bobbin and the contact roller at the normal winding position. It is within the area surrounded by b. After passing through the threading guide, the thread is sucked into the suction gun, and since the thread path is located outside the circumferential surface of the contact roller, the thread does not substantially contact the contact roller, and the thread does not touch the contact roller. It never gets rolled up.

Even while the turret rotates, the contact angle (winding angle) of the yarn being attracted by the suction gun to the contact roller is small, so the yarn is wound around the contact roller even when threading onto the bobbin B. This will be prevented.

Therefore, according to the present invention, the winding speed is
It is possible to reliably and smoothly thread the thread at startup in a revolving type automatic winder that operates at a speed of 4000 m/min or more.

[Brief explanation of drawings]

1 and 2 are front views of the embodiment of the present invention, FIG. 3 is a left side view of FIG. 2, and FIGS. 4 and 5 are partial sectional views of FIG. 1. 3... Slide block, 4... Traverse guide, 5... Traverse box, 6... Contact roller, 9... Thread removal guide, 10... Swing cylinder, 12... Turret, 13, 13'...
...Bobbin holder, 36... Spindle drive motor, 41... Threading arm, 42... Rotary actuator, 43... Threading bar, 44... Threading guide, 45... Suction gun.

Claims (1)

[Scope of Claims] 1. A turret that rotatably supports a plurality of yarn winding bobbins and is rotatable in a direction opposite to the rotational direction of the winding bobbins, and is pressed against the winding bobbin at the normal winding position. In a revolving type automatic winder comprising a contact roller, the turret is rotated in a direction opposite to the rotational direction of the yarn winding bobbin to continuously wind the yarn. The rotation of the yarn winding bobbin is temporarily stopped and the yarn winding bobbin is pressed against the contact roller, and the extension line of the tangent line between the bobbin and the contact roller in the pressed state and the tangent line between the bobbin and the contact roller at the normal winding position are measured. After positioning the threading guide member within the area surrounded by the extension line, the turret is rotated in a direction opposite to the rotational direction of the thread winding bobbin to thread the thread on the thread winding bobbin; The method for threading a thread in a revolving type automatic winder further comprises rotating the turret in the direction to position the winding bobbin at a normal winding position and winding the thread. 2 Rotatably supports a plurality of yarn winding bobbins, and is rotatable in a direction opposite to the rotational direction of the yarn winding bobbins so as to take the yarn winding bobbins to a standby position and a normal winding position. It consists of a contact roller that contacts a turret and a yarn winding bobbin in a normal winding position, and rotates the turret in a direction opposite to the rotational direction of the yarn winding bobbin to continuously wind the yarn. In the revolving type automatic winder, the rotation of the turret in a direction opposite to the rotational direction of the yarn winding bobbin can be temporarily stopped, and when the rotation is stopped, the contact roller rotates the yarn winding of the turret. Within the threading area that can be pressed against the bobbin and surrounded by the extension of the tangent between the bobbin and the contact roller in the pressed state and the extension of the tangent between the bobbin and the contact roller at the normal winding position, as well as the threading area A revolving type automatic winder characterized by being provided with a threading guide member that is movable between outside standby positions.