JPH04358670A - Switching winder for filament - Google Patents

Abstract

PURPOSE:To provide a switching winder for a filament which is reduced in an installation space. CONSTITUTION:A closed loop-form bobbin holder guide passage is formed in a machine frame 1, and inner gear members 65 and 66 are located at intervals in the axial direction of bobbin holders 7 and 8 along the bobbin holder guide passage. Two bobbin holders are supported to sliders 13 and 14 and gears 67a, 67b, 68a, 68b, 69a, 69b, 70a, and 70b located to the support part of the bobbin holder are engaged with an inner gear member. Tow chains 82 and 83 are arranged at intervals in the axial direction of the bobbin holders along the bobbin holder guide passage and the chains are individually coupled to a plurality of the bobbin holders. By individually driving the chains, the two bobbin holders are independently guided along the closed loop-form bobbin holder guide passage to a winding position, doffing position, an empty bobbin device position, a waiting position, and a switching position.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn switching winding machine for winding synthetic fiber yarn or the like at high speed.

More specifically, the present invention provides an automatic switching winding machine which has a plurality of bobbin holders and switches yarn winding to the other bobbin holder when the number of packages wound on one bobbin holder reaches a predetermined amount. Regarding.

0003

[Prior Art] In recent years, winding machines for winding synthetic fiber yarns, etc. at high speeds have become multi-copper (many bobbins are attached to one bobbin holder) and larger in diameter (the winding amount of the package is large). There is a tendency to

As a conventional switching winder, a disc-shaped turret table is rotatable around the central axis of the disc, and a plurality of bobbin holders are rotatably protruded from fixed positions on the turret table. Therefore, a turret type automatic switching winding machine is often used, which rotates a turret table together with a bobbin holder around a central axis to switch the winding of yarn from one bobbin holder to the other bobbin holder.

[0005]

[Problems to be Solved by the Invention] In such a turret type automatic switching winding machine, the turret table can be moved while maintaining a constant relative positional relationship between the turret table and a plurality of bobbin holders protruding from the turret table. Rotate. Therefore, the bobbin holder interval needs to be at least half the sum of the diameter of the empty bobbin and the maximum winding diameter of the package, plus the allowance between the empty bobbin and the package. For this reason, there is a drawback that the height and width of the winding machine become large.

In addition, for the turret of the turret table, the diameter of the empty bobbin holder, the maximum winding diameter of the package, the margin between the empty bobbin holder and the package, and the size of the bearing supporting the turret table must be calculated. Requires a circular shaped space with a diameter. Therefore, there is a drawback that the installation space between adjacent machines becomes large.

[0007] In addition, in a revolving type automatic winding machine having a contact roller without a driving source, during the turret, the package being wound leaves the contact roller and the waiting empty bobbin contacts the contact roller. During this period (for example, about 3 seconds), the contact roller is free to rotate. For this reason, the number of rotations of the contact roller during the turret decreases, and the thread may become loose and break. Furthermore, even if the empty bobbin holder comes into contact with the contact roller, the rotational speed of the contact roller does not completely return to its original speed. For this reason, there are disadvantages such as the yarn caught in the empty bobbin loosening and breaking, and the transfer tail and inner layer yarn becoming uneven.

Furthermore, in the above-mentioned turret-type automatic winder, when switching to thick winding, the yarn passing from the contact roller to the package being wound and the surface of the empty bobbin are moved in opposite directions and have a large winding angle. Due to contact, the thread may become loose and the success rate of switching may decrease.

[0009]

OBJECTS OF THE INVENTION It is an object of the present invention to provide a yarn switching winder which solves the problems associated with the conventional automatic switching winder described above and requires a small installation space.

Furthermore, even when the present invention is applied to a winding machine with a contact roller that is not equipped with a drive source, the time required for the full package to separate from the contact roller and come into contact with the empty bobbin at the time of switching can be shortened. It is an object of the present invention to provide a yarn switching winding machine that can reduce speed fluctuations of a contact roller during switching.

Still another object of the present invention is to provide a yarn switching winding machine that is equipped with a highly rigid support mechanism that can always support a bobbin holder for winding yarn parallel to a contact roller. .

0012

[Means for Solving the Problems] The present invention achieves the above object by having a plurality of bobbin holders, and when the number of packages wound on one bobbin holder reaches a predetermined amount, the yarn winding is switched to the other bobbin holder. In the automatic switching winding machine, a closed loop bobbin holder guide path guides a plurality of bobbin holders along a winding position, a doffing position, an empty bobbin mounting position, a standby position, a switching position, and the winding position; This is achieved by a yarn switching winding machine characterized by comprising means for independently moving a plurality of bobbin holders along the bobbin holder guide path.

[0013]

[Operation] According to the present invention, since a plurality of bobbin holders can be moved independently along the bobbin holder guide path, the installation space is the sum of the maximum winding diameter of the package and the diameter of the empty bobbin. 3/4 of winder
Can be done to a certain extent.

In addition, since the bobbin holder with an empty bobbin can be moved independently of the bobbin holder with a fully wound bobbin, even when installed in a spindle-driven automatic winder without a drive source, it is possible to move the bobbin holder on the back side. Since the bobbin holder can be positioned in advance in the vicinity of the contact roller, the time from when the full package leaves the contact roller until the empty bobbin holder comes into contact with it can be shortened. Therefore, the number of rotations of the contact roller can be kept almost constant during switching.

Furthermore, since a plurality of bobbin holders can be moved independently, compared to conventional turret-type automatic winders, the contact angle of the empty bobbin can be adjusted even when the circumferential speed direction of the empty bobbin and the direction of yarn travel are opposite to each other. It can be made smaller, reduces thread slack and thread fuzz at high speeds, and improves automatic switching success rate.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

FIGS. 1 to 6 show in chronological order a yarn switching method in an embodiment of the present invention implemented in a spindle-driven automatic switching winding machine, and (a) in each figure shows A front view, and (b) a side view. In the illustrated embodiment, four paper tubes (bobbins) are attached to each bobbin holder to form four packages at the same time. The parts shown are indicated by adding a to d to the reference numerals used in (a) of each figure. FIG. 7 is a drive system diagram of the above embodiment.

1 to 6, a machine frame 1 of the spindle-driven automatic switching winding machine of this embodiment is placed on a base 2 consisting of a pair of channels, and a slide block 3 is connected to a stroke bearing 4a, 4b (see FIGS. 1(b) and 7), it is supported so as to be movable up and down. A traverse device 5 and a frame 6 of a contact roller 15 are attached to the slide block 3.

The traverse device 5 includes a traverse guide 1
6, the yarns Ya to Yd are traversed from side to side. The frame 6 rotatably supports the contact roller 15.

In FIG. 1, the paper tubes 9a to 9d are attached to the bobbin holder 7, which is waiting at a standby position, and the package 11
The paper tubes 10a to 10d are attached to the bobbin holder 8 that winds up the paper, and the packages 11a to 11a are attached to the bobbins 10a to 10d.
11d is wound up.

The plate 12 is pushed out parallel to the bobbin holder 8 by a cylinder (not shown) and the package 1
Extrude 1a to 11d.

The bobbin holder 7 is supported by a slider 13, and the bobbin holder 8 is supported by a slider 14. Cam followers 13a on sliders 13 and 14,
14a is attached, and the cam followers 13a, 14a are movably supported by fitting into guide grooves (not shown) provided in the machine frame.

A thread removal plate 19 is swingably supported at an upper position of the traverse device 5, and is swingable by a cylinder (not shown).

A cylinder 17 (see FIGS. 1(b) and 7) is connected to the slide block 3, supports the weight of the slide block 3 to which the traverse device 5 and the contact roller 15 are attached, and applies a predetermined contact pressure to the package 11. It is now granted.

A thread regulation groove 18a is formed in the thread guide 18 provided on the frame 6 opposite to the thread removal plate 19 (see FIG. 2(b)).

The motors 20 and 21 are connected to bobbin holders 9 and 10, respectively (FIG. 7).
1 are connected to inverters 22 and 23, respectively.

As shown in FIG. 7, the contact roller 15
A gear 24 is fixed to one end of the contact roller 15, and the rotation speed of the contact roller 15 is detected by an electromagnetic pickup 25 installed opposite to the machine frame.

The slide block 3 is provided with a knocker 28 that engages limit switches 26 and 27, the limit switch 26 confirms the upper limit position of the slide block 3, and the limit switch 27 confirms the lower limit position of the slide block 3. .

In FIG. 7, a pair of upper and lower sprockets 3
A chain 38c is stretched between 8a and 38b. The chain 38c is connected to the slider 13 that supports the bobbin holder 7 via a joint 38d. Sprocket 38a is connected to worm reducer 29. Therefore, by rotating the worm reducer 29,
The sprocket 38a rotates, the chain 38c moves together with the slider 13 around the sprockets 38a and 38b along a track-shaped path, and the slider 13 is held in a predetermined posture by the cam follower 13a.

Similarly, a pair of sprockets 39a, 39b
A chain 39c is stretched between them. chain 39c
is connected to the slider 14 that supports the bobbin holder 7 via a joint 39d. Sprocket 39a
is connected to the worm reducer 30. Therefore, by rotating the worm reducer 30, the sprocket 39a rotates, the chain 39c moves together with the slider 14 around the sprockets 39a and 39b along a track-shaped path, and the slider 14 is moved to a predetermined position by the cam follower 14a. It is considered to be a posture.

In addition, in FIG. 7, the chains 38c, 3
9c is shown separated into left and right, but sprocket 38
It is preferable that the sprockets a and 39a are provided coaxially in the front and back, and furthermore, the sprockets 38b and 39b are also coaxially provided in the front and back so that the chains 38c and 39c take paths that overlap in the front and back. In this case, the worm reducer 29,
One of the sprockets 30 is connected to sprockets 38a and 39 via a hollow shaft.
It is preferable to link it to a.

[0032]A more specific example in which two chains take paths that overlap one another is shown in Fig. 9.
- will be described later with reference to FIG.

The worm reducers 29 and 30 are connected to electromagnetic switches 31 and 32, respectively, and the power to the worm reducer 29 is turned on and off according to instructions from a computer 33.

The computer 33 includes a random access memory (RAM) 34 and a read only memory (ROM).
35, central processing unit (CPU) 36 and input port (
It consists of 37 I/Os.

The switching method of the embodiment of the switching winder according to the present invention described above will be explained below.

[0036] The bobbin holder 7 is waiting at a position axially retreated by a distance l from the bobbin holder 8 during winding (see Fig. 1(b)). In this state, inverter 2
The package 11 is wound onto a paper tube 10 mounted on a bobbin holder 8 by driving a motor 21 via a motor 3.

When the package 11 reaches a predetermined amount of winding,
The motor 20 is activated via the inverter 22 to rotate the bobbin holder 7.

When the bobbin holder 7 reaches a predetermined rotation speed (1.02 to 1.2 times the normal winding speed), the rotation of the bobbin holder 8 is increased to about 1.02 to 1.1 times higher than the normal winding speed. Then, the worm reducer 30 moves the bobbin holder 8 to the position shown in FIG. 2(a). at the same time,
The thread removal plate 19 is swung by a cylinder (not shown) to remove the thread Y being traversed by the traverse guide 16, and insert the thread Y into the groove 18a formed in the thread shifting guide 18 located at the opposing position. , the thread Y is wound onto the package 11 to form bunch windings 11a' to 11d' while regulating the threads to positions corresponding to the thread gripping grooves 9a' to 9d' of each paper tube 9 attached to the waiting bobbin holder 7. (See Figure 2(b)).

Next, as shown in FIG. 3(a), the bobbin holder 7 is moved along a track-shaped path by the worm reducer 29, and the thread Y is moved through the thread gripping grooves 9a' to 9a' to the paper tubes 9a to 9d.
9d' (see FIG. 3(b)), and a slight bunch winding is formed on the thread gripping grooves 9a' to 9d'.

Note that when the bobbin holder 7 is moved, the contact roller 15 is lifted upward by the cylinder 17 and maintains contact with the bobbin holder 7.

Next, as shown in FIG. 4(b), the bunch guide 18 is moved in the right direction (in FIG. 4) by a cylinder (not shown).
At the same time, the bobbin holder 7 is moved to the left (arrow B) by a cylinder (not shown), a transfer tail is formed on the paper tube 9, and the thread removal plate 19 is returned to its original position.

The yarn Y is caught by the traverse guide 16, the traverse movement by the traverse guide 16 is started, and a package is formed on the bobbin 9.

When the yarn Y is switched from the package 11 wound up on the paper tube 10 attached to the bobbin holder 8 to the paper tube 9 attached to the bobbin holder 7, a brake is applied to the bobbin holder 8.

When the bobbin holder 8 has stopped, the chuck of the paper tube 10 is released by pressing the push button. The package 11 is pushed in the axial direction of the bobbin holder 8 by the package extrusion plate 12 and extracted, and a new empty paper tube 10 is attached to the bobbin holder 8 and chucked (FIG. 5).

When the paper tube 10 is chucked, the bobbin holder 8 moves all at once from the above-described doffing and empty bobbin mounting position to the standby position (arrow C), as shown in FIG. 6(a).
It moves a distance l in the axial direction and waits until the bobbin holder 7 is fully wound. Next, thread guide 1 moved to the right
8 returns to the left and waits.

When the number of packages 20 wound around the paper tube 9 attached to the bobbin holder 7 reaches a predetermined amount, the thread Y is switched from the bobbin holder 7 to the bobbin holder 8 in the same manner as described above.

[0047] Thereafter, the yarn Y is sequentially switched using the same method.

Note that the winding control in the above embodiment is performed as follows.

A contact roller 15 is pressed against a package 11 wound around a bobbin 10 mounted on a bobbin holder 7. A gear 24 is fixed to the shaft of the contact roller 15, and the rotational speed of the contact roller 15 is detected by an electromagnetic pickup 25. The frequency of the inverter 22 that drives the motor 20 is controlled so that the number of rotations of the contact roller 15 becomes a predetermined value.

When the package 11 wound around the bobbin 10 becomes thicker, the slide block 3 to which the contact roller 15 that is pressed against the package 11 is raised, and the knocker 28 hits the limit switch 26, the electromagnetic switch 31
is closed. The worm reducer 29 is driven, the sprocket 38a rotates, and the slider 13 (bobbin holder 8 is slidably attached) is connected by a joint 38d to a chain 38c engaged with the sprocket 38a.
gradually move downward. When the knocker 28 attached to the slider 13 hits the limit switch 27, the worm reducer 29 is stopped.

Thereafter, the above method is repeated to roll up the package 11.

Note that the reduction ratios of the worm reducers 30 and 29 are set so that they do not descend due to the weight of the package wound onto the bobbin holder. Also, use the brakes when descending due to the weight of the package.

In this embodiment, when switching, the bobbin holder on the back side is moved in the axial direction, but a thread regulation guide may be inserted between the package and the empty bobbin as in the embodiment shown in FIG. .

In this embodiment, at the time of switching, the bobbin holder during winding was moved to the state shown in FIG. 2, and then the bobbin holder on the back side was moved to the position shown in FIG. (Empty bobbin outer diameter or more)
If you move when the volume is reached, the switching from empty to full volume can be completed in approximately the same time, and the success rate of switching from small volume to small volume will improve. In this case, it is preferable to detect the moving distance of the worm reducer or bobbin holder using an encoder or the like.

[0055] Instead of the worm reducer, a cylinder or other drive source may be used.

Although this embodiment has been described with respect to a spindle drive type winder, the present invention can also be implemented in a friction drive type winder. In this embodiment, the locus of movement of the bobbin holder is in the shape of a track, but it may also be circular, oval, triangular, rectangular, or the like.

Further, another embodiment of the present invention is shown in FIGS. 9 to 11.
Explain with reference to. FIG. 9 shows a front view of this embodiment, FIG. 10 is a sectional view taken along line XX in FIG. 9, and FIG. 11 is a sectional view taken along line XI--
FIG.

Next, the configuration of this embodiment will be explained with reference to FIGS. 9 to 11. Note that the same reference numerals are used for parts that are the same as or similar to those in the embodiment described above with reference to FIGS. 1 to 7 and 8, and explanations thereof are omitted.

Similar to the embodiment described above, the machine frame 1 is placed on a base 2 consisting of a pair of channels, and the machine frame 1
A supporter 3 is provided protruding from the base. The frame 6 is supported so as to be able to swing up and down around a fulcrum 54 provided on the supporter 3,
A traverse device 5 and a contact roller 15 are attached to the frame 6. In this embodiment, the traverse device 5 is a traverse device that traverses the yarn using guides that rotate in opposite directions.

The bottom of an air cylinder 61 is connected to the hollow portion of the supporter 3 by a pin 59, and the piston rod of the air cylinder 61 is connected to the frame 6 by a pin 60. The contact roller 15 is supplied to support the weight of the frame 6, the contact roller 15, and the traverse device 5, and a predetermined pressing force is applied between the contact roller 15 and the bobbin holder 11 during winding.

In FIG. 9, a paper tube 9 is attached to the bobbin holder 7 that is waiting at a standby position, and a paper tube 10 is attached to the bobbin holder 8 that is winding up the package 11. As in the previous embodiment, the bobbin holders 7 and 8 are each driven by an electric motor (not shown), and a controller (not shown) informs the contact roller 15 to rotate at a predetermined rotation speed during yarn winding. It is controlled by the following method.

[0062] Bobbin holder 7 is supported by slider 13, and bobbin holder 8 is supported by slider 14.

After switching from the bobbin holder 8 with the full package 11 attached to the bobbin holder 7 with the paper tube 9 attached, the bobbin holder 8 is moved to the package 11 unloading position, and at that position the paper tube with the package 11 wound thereon is removed. 10
The plate 40 that engages with is pushed out parallel to the bobbin holder 8 by a cylinder (not shown), and the package 11 is pushed out.

A hole 1a of an appropriate shape (in the illustrated embodiment, a parallelogram shape with rounded corners) is formed in the machine frame 1 so as to pass through the bobbin holders 7 and 8 in the axial direction. Inner gears 65 and 66 having predetermined trajectories along the guide path are secured to the bobbin holders 7 and 8 at intervals in the axial direction.

The slider 13 rotatably supports both ends of two shafts 67 and 68, and the shafts 67 have gears 67a and 67.
7b (not shown) is formed, and the shaft 68 has a gear 68a,
68b (not shown) is formed. Further, the slider 14 similarly rotatably supports two shafts 69 and 70,
Gears 69a and 69b (not shown) are formed on the shaft 69, and gears 70a and 70b (see FIG. 10) are formed on the shaft 70.

Gears 67a, 68a, 69a and 70a
meshes with inner gear 65, while gears 67b, 68
b, 69b and 70b mesh with the inner gear 66.

In FIG. 10, a pair of arms 74a and 74b are swingably attached to the shaft 70 via needle bearings 82, and a pair of arms 74a and 74b are provided at the tip of each arm 74a and 74b at a predetermined distance from the shaft 70. Cam followers 78a and 78b are attached to each. Similarly, Figure 9
As shown, arms 71a and 71b are pivotally attached to the shaft 67, and cam followers 75a and 75a are attached to the arms 71a and 71b.
5b is attached. Further, the shaft 68 has an arm 72a,
72b is pivotally mounted, and cam followers 76a, 76b are attached to the arms 72a, 72b. Further, arms 73a and 73b are pivotally connected to the shaft 69.
Cam followers 77a and 77b are attached to.

Cam followers 75a and 76 are provided on the outer peripheral surface (surface opposite to the teeth) of the member on which the inner gear 65 is formed.
a, 77a and 78a engage. On the other hand, a cam follower 7 is attached to the outer peripheral surface of the member where the inner gear 66 is formed.
5b, 76b, 77b and 78b are engaged.

In this way, the gears 67a, 68a, 6
9a, 70a and cam followers 75a, 76a, 77a,
Inner gear 65 is sandwiched between gears 78a, and gears 67b and 6
8b, 69b, 70b and cam followers 75b, 76b,
The inner gear 76 is sandwiched between 77b and 78b,
Sliders 13 and 14 are movable along the outer peripheries of inner gears 65 and 66.

Furthermore, a chain 82 is stretched along the outer peripheral surface of the member of the inner gear 65 (see FIG. 10), and the chain 82 is attached to the slider 13 with pins 84a and 84b via a connecting rod 84 as shown in FIG. are connected by. Also, the chain 8 is attached along the outer peripheral surface of the member of the inner gear 66.
3 is stretched, and the chain 83 is connected to the slider 14 via a connecting rod 85 with pins 85a and 85b.

A servo motor 86 is attached to the machine frame 1,
A sprocket 88 fixed to the shaft of the servo motor 86 is engaged with the chain 82, and as the servo motor 86 rotates, the chain 82 is moved and the slider 13 is moved along the inner gears 65, 66.

Similarly, a servo motor 87 is provided on the machine frame 1, and a sprocket 8 fixed to the shaft of the servo motor 87
9 engages with the chain 83, and as the servo motor 87 rotates, the slider 14 moves along the inner gears 65 and 66 via the chain 83.

In FIG. 9, a guide device 95 provided on the machine frame 1 opposite to the traverse device 5 guides the yarn Y removed from the guide 16 of the traverse device 5 to the ends of the paper tubes 9 and 10 when switching yarns. The internal structure of the guide device 95 is omitted.

Next, the operation will be explained. This operation is performed by a controller (with a built-in computer (CPU)).
(not shown).

In the steady winding state, the bobbin holder 8
The package 11 is wound around the paper tube 10 mounted on the paper tube 10, and the contact roller 15, which is in pressure contact with the package 11, moves upward a minute distance, and when a limit switch (not shown) is turned on, the servo motor 87 is activated. Ru. As a result, when the bobbin holder 8 descends downward and the limit switch is turned off, the servo motor 87 stops. Thereafter, the above operation is repeated according to the winding thickness of the package 11.

When the package 11 reaches a predetermined amount of winding,
Activate the backup bobbin holder 9. When the bobbin holder 9 reaches a predetermined rotational speed, the servo motor 86 is activated to move the bobbin holder 8 holding the fully wound package downward, detached from the contact roller 15, and fixed at a predetermined position.

During movement of the bobbin holder 8, the distance between the bobbin holder 8 and the contact roller 15 becomes a predetermined distance (in this embodiment, the distance between the outer periphery of the bobbin holder 8 and the contact roller 1
5, the thread removal guide 19 is moved to the right in FIG. 9 by a cylinder (not shown) to remove the thread from the traverse device 5, and then While winding the yarn onto the package 11 near the end of the package 11 using a known method, the yarn gripping means (in this embodiment, a groove formed on the outer periphery of the paper tube) of the paper tube 9 attached to the bobbin holder 8 is used. (although other means may be used).

Next, when the servo motor 87 is started and the bobbin holder 7 is moved to the right in FIG. stops. During this time, a small amount of bunch winding (bar winding) is formed near the gripping means.

Next, the guide device 95 and bobbin holder 7
Due to the axial movement of the paper tube 9, a transfer tail is formed on the paper tube 9. When the axial movement of the bobbin holder 7 is completed, the thread is released from the guide device 95, and the thread is traversed by the traverse device 5.

A package (not shown) is wound onto a paper tube 9 mounted on a bobbin holder 7, and the contact roller 1 is brought into pressure contact with the package (not shown).
5 moves a minute distance upward, the limit switch (not shown) is turned on and the servo motor 86 is turned on as described above.
is started, the bobbin holder 7 moves downward and the limit switch is turned off, and the servo motor 86 stops.

Thereafter, the above operation is repeated according to the winding thickness of the package (not shown) wound on the bobbin 9, and until the predetermined winding diameter is reached, the package 11 at the take-out position is pushed out by the plate 40. An empty paper tube 10 is attached.

Next, the slider 14 supporting the bobbin holder 8 is raised by the servo motor 86 to a standstill position and stopped. The backup bobbin holder 8 is on standby at this position, and when the yarn being wound on the bobbin holder 7 that is being wound reaches a predetermined amount, the bobbin holder 8 at the backup position
is activated, and the same operation as above is repeated.

As described above, according to this embodiment, two bobbin holders can be circulated in the minimum necessary space.
The spindle spacing can be made smaller compared to conventional turret type winders. Moreover, the bobbin holder can always be supported with high parallel accuracy and high rigidity relative to the contact roller, and vibration of the bobbin holder can be suppressed to a small level during winding of the yarn.

In this embodiment, an inner gear (internally toothed gear member) is used as the endless gear member, but an outer gear (externally toothed gear member) having teeth on the outer periphery may also be used. Further, instead of the inner gear of this embodiment, a chain, a toothed belt, etc. may be fixed to the frame, and the bobbin holder may circulate by engaging with the chain, toothed belt, etc.

In this embodiment, the two bobbin holders circulate in the direction opposite to the direction of rotation of the bobbin, but they may also circulate in the same direction.

[0086]

According to the present invention, since a plurality of bobbin holders can be moved independently along the bobbin holder guide path, the installation space is the sum of the maximum winding diameter of the package and the diameter of the empty bobbin, which is different from the conventional turret. The size is about 3/4 that of an automatic mold winder, reducing the installation space.

Furthermore, since the bobbin holder with an empty bobbin mounted thereon can be moved independently of the bobbin holder with a fully wound bobbin mounted thereon, even when implemented in a spindle-driven automatic winding machine that does not have a contact roller drive source, Since the bobbin holder on the backing side can be positioned in advance near the contact roller, the time from when the full package leaves the contact roller until the empty bobbin holder comes into contact with it can be shortened. Therefore, the number of rotations of the contact roller can be kept substantially constant during switching, and control performance during switching can be improved.

Furthermore, since multiple bobbin holders can be moved independently, compared to conventional turret-type automatic winders, the contact angle of the empty bobbin can be adjusted even when the direction of the circumferential speed of the empty bobbin and the direction of yarn movement are opposite to each other. It can be made smaller, reduces thread slack and thread fuzz at high speeds, and improves automatic switching success rate.

As shown in the embodiment of the present invention, an endless gear member is disposed on the machine frame, a plurality of sliders that engage with the endless gear member are disposed, and a bobbin holder supported by the slider is mounted on the endless gear member. By independently moving along the gear member, the bobbin holder can always be supported with high parallelism accuracy and high rigidity with respect to the contact roller. Therefore, the vibration of the bobbin holder can be suppressed to a small level during winding of the yarn.

[Brief explanation of drawings]

FIG. 1(a) is a front view showing a yarn switching method in an embodiment of the present invention implemented in a spindle-driven automatic switching winding machine.

FIG. 1(b) is a side view of FIG. 1(a).

[Figure 2(a)]

FIG. 1 is a front view showing the next step of FIGS. 1(a) and 1(b). FIG. 2(b) is a side view of FIG. 2(a).

FIG. 3(a) is a front view showing the next step of FIGS. 2(a) and 2(b).

FIG. 3(b) is a side view of FIG. 3(a).

FIG. 4(a) is a front view showing the next step of FIGS. 3(a) and 3(b).

FIG. 4(b) is a side view of FIG. 4(a).

FIG. 5(a) is a front view showing the next step of FIGS. 4(a) and 4(b).

FIG. 5(b) is a side view of FIG. 5(a).

FIG. 6(a) is a front view showing the next step of FIGS. 5(a) and 5(b).

FIG. 6(b) is a side view of FIG. 6(a).

FIG. 7 is a drive system diagram of the embodiment shown in FIGS. 1(a) to 6(b).

FIG. 8(a) is a front view of another embodiment.

FIG. 8(b) is a side view of the embodiment shown in FIG. 8(a).

FIG. 9 is a front view of another embodiment of the invention.

FIG. 10 is a sectional view taken along line XX in FIG. 9;

FIG. 11 is a sectional view taken along line XI-XI in FIG. 9;

[Explanation of symbols]

7 Bobbin holder 8 Bobbin holder 13 Slider 14 Slider 13a Cam follower 14a Cam follower 29 Worm reducer 30 Worm reducer 38a sprocket 38b sprocket 39a Sprocket 39b sprocket 38c chain 39c chain 38d joint 39d joint 65 Inner gear 66 Inner gear 67 axis 67a gear 67b gear 68 axis 68a gear 68b gear 69 axis 69a gear 69b gear 70 axis 70a gear 70b gear 74a Cam follower 74b Cam follower 75a Cam follower 75b Cam follower 76a Cam follower 76b Cam follower 77a Cam follower 77b Cam follower 82 Chain 83 Chain 86 Servo motor 87 Servo motor 95 Guide device

Claims (5)

[Claims] Claim 1: An automatic switching winding machine that has a plurality of bobbin holders and switches yarn winding to the other bobbin holder when the number of packages wound on one bobbin holder reaches a predetermined amount. A closed loop bobbin holder guide path guides the bobbin holder along the winding position, doffing position, empty bobbin mounting position, standby position, switching position, and the winding position, and a plurality of bobbin holders are independently guided along the bobbin holder guide path. 1. A switching winding machine for yarn, comprising a means for moving the yarn. 2. The closed-loop bobbin holder guide path is formed in a machine frame, an endless gear means is provided in the machine frame along the bobbin holder guide path, and a supporting portion of the bobbin holder is provided with an endless gear means. The yarn switching winding machine according to claim 1, further comprising an engaging gear. 3. A plurality of the endless gear means are formed at intervals in the axial direction of the bobbin holder, and a plurality of gears are provided on the support portion of the bobbin holder so as to engage with both the endless gear means. 3. The yarn switching winding machine according to claim 2, further comprising a yarn switching winding machine. 4. A plurality of endless drive means are provided along the closed loop bobbin holder guide path and spaced apart in the axial direction of the bobbin holder, and each of the endless drive means is connected to the plurality of bobbin holders. The yarn switching winding machine according to claim 2 or 3, characterized in that: 5. The yarn switching winding machine according to claim 4, wherein the endless drive means is a chain, and the chain is driven by a motor.