JPH032789B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention rotatably supports a plurality of yarn winding bobbins, and allows the yarn winding bobbins to take a standby position and a normal winding position. It consists of a rotatable turret and a contact roller that comes into contact with the yarn winding bobbin in the normal winding position, and the turret is rotated in the opposite direction to the rotational direction of the yarn winding bobbin to continuously wind the yarn. This invention relates to an initial threading method for a revolving type automatic winder.

[Conventional technology]

The revolving type automatic winder with the above structure is
For example, it is described in Japanese Patent Application Laid-Open No. 155737/1983.

In this reforming type automatic winder,
Automatic bobbin switching is performed as follows. When the winding yarn on the winding bobbin located at the normal winding position reaches a predetermined winding amount (full bobbin), the turret is rotated in the opposite direction to the rotating direction of the full bobbin to return to the full bobbin position. Swap the position of the empty bobbin that was in the standby position until then. During this time, the crossover thread connected to the fully wound bobbin is brought into contact with the thread locking means of the empty bobbin, the thread is hooked onto the empty bobbin, and winding onto the empty bobbin is continued.

[Problem to be solved by the invention]

However, conventionally, when starting the operation of the above-mentioned revolving type automatic winder, threading is carried out on the empty bobbin using a procedure different from that at the time of automatic switching. That is, the yarn is drawn onto the bobbin by hand while being taken up by the suction means. However, this initial threading requires skill and there is a problem in that smooth threading cannot be performed.

In particular, there has been a recent trend toward automatic winders having more winders, and as the number of threads increases, this initial threading becomes even more difficult. For example, in the case of 4 plows,
Four threads must be caught simultaneously into four separate bobbins. If there is a delay of a few seconds before a single thread is hung, the thread that was previously hung will be wound onto the bobbin during that time, and the diameter of the package will increase rapidly. In a friction winder, this increased diameter package surface is driven by a friction roller. Further, in a spindle winder, each bobbin is driven by a spindle at a constant speed. In any case, since the rotational speed of the spindle on which each bobbin is attached is the same, the circumferential speed of the package is proportional to its diameter.
Therefore, the surface speed of the bobbin that is caught late is low, and once the thread is caught, its tension is reduced, and as a result, the thread is wound around the friction roller or contact roller, and the thread is not threaded. will fail. For this reason, in a multi-thread winder, it is necessary to catch a large number of yarns almost simultaneously.

In addition, from the viewpoint of workability in subsequent processes, it is necessary that the package during threading be provided with a transfer tail (commonly known as a picktail).

[Circumstances leading to the present invention]

As described above, during automatic switching, threading can be performed by bringing the crossover thread connected to the fully wound bobbin into contact with the thread locking means of the empty bobbin. On the other hand, when initially threading the automatic winder, the threading is performed at a different timing from when automatic switching is performed.

As a result of intensive study, the inventor found that at the time of initial threading,
Prepare a spare bobbin as a substitute for a fully wound bobbin,
The thread is guided from this spare bobbin to the thread guide in the same way as it is passed from a full bobbin to an empty bobbin to be threaded during automatic switching, and in this state, the automatic winder's automatic switching mechanism is used to perform a switching operation (turret). The inventors have discovered that initial threading can be carried out by exchanging the positions of a full bobbin and an empty bobbin by rotating the bobbin, and have come up with the present invention.

[Purpose of the invention]

An object of the present invention is to provide a threading method for a revolving type automatic winder, which can catch a large number of threads almost simultaneously even in a multi-thread winder, and can also provide a transfer tail to a package during threading.

[Means to solve the problem]

The present invention has achieved the above-mentioned object by providing a turret that rotatably supports a plurality of yarn winding bobbins and is rotatable so as to allow the yarn winding bobbins to take a standby position and a normal winding position, and a normal winding A revolving type automatic winder consists of a contact roller that comes into contact with a yarn winding bobbin at a position, and the turret is rotated in a direction opposite to the rotational direction of the yarn winding bobbin to continuously wind the yarn. In this method, the spare bobbin is placed in the normal winding position and brought into contact with the contact roller, and the yarn passed between the spare bobbin and the contact roller is placed closer to the contact roller than the common tangent line between the spare bobbin and the contact roller. After threading, move the thread guide to the center of rotation of the turret and change the thread path from the contact roller to the thread guide when switching bobbins. Then, the turret is rotated in the opposite direction to the rotational direction of the yarn winding bobbin to move the yarn winding bobbin next to the spare bobbin to the normal winding position, while This is achieved by a threading method of a revolving type automatic winder in which the thread is threaded onto the thread winding bobbin.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, which illustrate embodiments of the invention.

FIG. 1 shows a perspective view of a spindle-driven double tandem type revolving automatic winder according to the present invention. FIG. 2 shows a front view of FIG.

In FIG. 2, 2 extending vertically to the machine frame 1
A book slide shaft 2 is fixedly installed. A slide block 3 moves up and down along the slide shaft 2 by a slide bearing (not shown). A contact roller 6 and a traverse box 5 are provided protruding from the slide block 3. traverse box 5
The contact roller 6 has a large number (four in the embodiment) of traverse guides 4 for traversing the yarn within the traverse region.The contact roller 6 is rotatably supported by a bearing 7a (FIG. 3) 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. Further, in a tension control type spindle winding machine, the yarn tension detected by a tension detector (not shown) is controlled to a predetermined value.

A turret 12 is rotatably supported on the machine frame 1. That is, as shown in FIG. 4, the turret 12 is rotatably supported around a support shaft 12a. Attach bobbin holder 1 to turret 12.
3 and 13' are rotatably protruded. Bobbin B
has an appropriate thread locking means, such as a thread hooking groove S having a U-shaped cross section and extending in the circumferential direction on the circumferential surface near the end face thereof. Four bobbins B are attached to each bobbin holder 13, 13'.

A pair of positioning recesses (not shown) are provided on 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.

As shown in FIGS. 1 and 2, a rotary actuator 42 is attached to the lower surface of the case 7, which supports the contact roller 6, on the side opposite to the machine frame 1. A thread hooking arm 41 is attached to the rotary actuator 42 so as to be swingable. A threading bar 43 is attached to the tip of the threading arm 41, and a large number (four in FIG. 1) of threading guides 44 are provided at equal intervals on the threading bar 43, as shown in FIG. There is. By operating the rotary actuator 42, the threading guide 44 provided at the tip of the threading arm 41 is moved to the contact roller 6.
It is possible to swing between a standby position on the horizontal side of the contact roller 6 and a threading position below the contact roller 6.

When the threading guide 44 is in the standby position, the straight line connecting the contact roller 6 and the threading guide 44 is located closer to the contact roller 6 than the common tangent between the contact roller 6 and the bobbin B. Further, when the threading guide 44 is at the threading position, the straight line connecting the contact roller 6 and the threading guide 44 approximates the path of the crossing thread between the bobbins during steady switching.

In FIG. 2, a thread removal guide 9 extending in the traverse direction of the traverse guide 4 is swingably supported above the traverse box 5 by a pin 8. Rod 10a of swing cylinder 10
The tip 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 cross the thread path of the thread Y.
The running yarn 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.
have one U-shaped recess (not shown) in each traverse zone.

Above the slide block 3, there is a bag bucket 4.
7 protrudes, and a large number (four in FIG. 1) of thread distribution guides 48 are attached to the bracket 47 at equal intervals.

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. 4, 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. 4, 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.
3 and passes through the shaft 34. 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. 5 and 6.

The threading arm 41 is placed in a standby state and the contact roller 6 and the spare bobbin B are brought into contact. In this state, a push button (not shown) is pressed to start the spindle drive motor 36, rotate the bobbin holder 13 to which the spare bobbin B is attached, and at the same time start the drive motor of the traverse device 5. In addition, a swing cylinder 10 provided above the traverse box 5
to move the thread removal guide 9 to the contact roller 6.
Rock to the side.

In this state, the suction gun 45 suctions the yarn Y and threads it through the yarn distribution guide 48 above the traverse box 5 (see FIGS. 5a and 6a).

Furthermore, the thread Y is passed between the contact roller 6 and the thread removal guide 9 (see FIGS. 5b and 6b), and then the suction gun 45 is moved so as not to fall below the common tangent between the contact roller 6 and the spare bobbin B. While paying attention to this, thread the yarn Y through the threading guide 44 provided on the threading bar 43 at the tip of the threading arm 41 in the standby position (see FIGS. 5c and 6c).

After the thread Y is hung on the threading guide 44, a push button (not shown) is pressed, and the rotary actuator 42 is activated to lower the threading arm 41 to the threading position. As a result, the contact roller 6
From there, the suction gun 45 passes through the threading guide 44.
The thread path of the thread sucked into the winder takes a route similar to that of the thread passing from the full bobbin to the empty bobbin during steady switching of the automatic winder.

In addition, the suction gun 45 is attached to the bobbin holder 1.
3 and 13' to the lower right position, and when the turret 12 is rotated, the bobbin holder 13'
prevent it from hitting the suction gun 45.
(See Figures 5d and 6d).

Next, a push button (not shown) is pressed to start the spindle drive motor 36' and rotate the bobbin holder 13' on which the yarn winding bobbin is attached. When the predetermined time required to increase the speed of the bobbin holder 13' has elapsed, the turret 12 is stopped by a timer.
begins to rotate. That is, the cylinder pulls out the positioning pin from the recess of the turret 12, and the turret rotation electric motor 26 moves the turret 12 in the direction of arrow T in FIG. 2 (that is, in the opposite direction to the rotation direction of the bobbin holder 13 during steady winding).
Rotate to.

During this rotation of the turret 12, the bobbin holder 13' moves inward in the axial direction due to engagement between the cam follower 30 provided thereon and the cam groove 28a formed in the cam 28. Due to the movement of the bobbin holder 13' and the movement of the thread removal plate 9 toward the contact roller 6, the yarn Y is held in the U-shaped recess of the bunch guide 11. Bunch guide moving cylinder 18
The machine moves toward the outside of the machine. With this operation, the thread path of the yarn drawn from the bunch guide 11, via the threading guide 44, and into the suction gun 45 is on a line that matches the threading groove S of the spare bobbin B attached to the bobbin holder 13'. placed.

When the turret rotates further and the auxiliary bobbin B and the yarn Y come into contact, the yarn Y is caught onto the auxiliary bobbin B by the threading groove S of the auxiliary bobbin B.

Further, as the turret 12 rotates, the cam follower 30 provided on the bobbin holder 13 and the cam groove 28a formed in the cam 28 engage with each other, and the bobbin holder 13 with the empty bobbin mounted moves axially to the outside of the machine frame. At the same time, the bunch guide 11 is moved toward the machine base by the bunch guide moving cylinder 18 while holding the yarn Y in the U-shaped recess. Due to this movement of the bobbin holder 13 and the bunch guide 11, a transfer tail (commonly known as a pigtail) is formed on the empty bobbin B attached to the bobbin holder 13.

The turret 12 rotates, and the bobbin holder 13,
13' is almost horizontal, move the suction gun 45 horizontally to the left, and
to prevent the bobbin holder 13 from hitting the
(see Figure e and Figure 6e).

Further, 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. As a result, the yarn Y 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 standby state by the rotary actuator 42 (FIG. 5f).
and FIG. 6f), 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.

If the contact roller is being actively driven, move the contact roller away from the spare bobbin, thread the thread between the contact roller and the spare bobbin, and connect the common tangent between the spare bobbin and the contact roller (the contact roller and the spare bobbin). It may also be arranged above the common tangent line in the state where the bobbin is in pressure contact with the bobbin.

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〕

According to the present invention, since the yarn is threaded onto the threading guide along a path closer to the contact roller than the common tangent between the spare bobbin and the contact roller located at the normal winding position, the thread is threaded onto the threading guide. When threading the thread, the thread is not wound around the bobbin.

In addition, after threading the threading guide, the threading guide is moved to the rotation center side of the turret, and the path of the thread traveling from the contact roller to the threading guide is changed to the crossing thread path between bobbins when switching bobbins. This makes it possible to reliably thread the thread onto the bobbin just by rotating the turret 12 in the same manner as during steady switching.

As described above, the present invention utilizes the automatic switching mechanism of an automatic winder to carry out initial threading, and even a multi-thread winder can catch many yarns almost simultaneously, and it is possible to Transfer tail can be definitely added to package.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an apparatus for carrying out the present invention, FIG.
The figure is the front view of figure 1, figure 3 and figure 4 are the front view of figure 2.
5A to 5F are side views for explaining the method of the present invention, and FIGS. 6A to 6F are front views of the same. 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)

[Claims] 1. A turret that rotatably supports a plurality of yarn winding bobbins and is rotatable so that the yarn winding bobbins take a standby position and a normal winding position, and a yarn winding bobbin that is in the normal winding position. In a method of threading a yarn in a revolving type automatic winder, which consists of a contact roller in contact with the yarn winder, the turret is rotated in a direction opposite to the rotating direction of the yarn winding bobbin to continuously wind the yarn. The bobbin is placed in the normal winding position and brought into contact with the contact roller, and the yarn passing between the spare bobbin and the contact roller is guided along a path closer to the contact roller than the common tangent line between the spare bobbin and the contact roller. After threading, the threading guide is moved to the rotation center side of the turret, and the path of the thread traveling from the contact roller to the threading guide is approximated to the thread path between bobbins when switching bobbins. Then, the turret is rotated in the opposite direction to the rotational direction of the yarn winding bobbin to move the yarn winding bobbin next to the spare bobbin to the normal winding position, and during this time, the yarn winding bobbin is A threading method for a revolving type automatic winder characterized by threading.