JP2875415B2 - Switching yarn winding 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 switching winder for winding a synthetic fiber yarn or the like at a high speed.

More specifically, the present invention relates to an automatic switching winding machine having a plurality of bobbin holders, wherein when a package wound on one bobbin holder reaches a predetermined amount, the yarn winding is switched to the other bobbin holder. About.

[0003]

2. Description of the Related Art In recent years, a winding machine for winding a synthetic fiber yarn or the like at high speed has a large number of cups (a large number of bobbins are mounted on one bobbin holder) and a large diameter (a large winding amount of a package). There is a tendency.

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

[0005]

In such a turret type automatic switching winder, the turret table is held while maintaining a relative positional relationship between the turret table and a plurality of bobbin holders protruding from the turret table. Rotate. Therefore, it is necessary to set the bobbin holder interval to at least half of the sum of the diameter of the empty bobbin and the maximum winding diameter of the package and a margin between the empty bobbin and the package. For this reason, there is a disadvantage that the height and width of the winder become large.

In addition, at the time of the turret of the turret table, a dimension obtained by adding the diameter of the empty bobbin holder, the maximum winding diameter of the package, the allowance between the empty bobbin holder and the package, and the size of the bearing supporting the turret table is added. Requires a circular space with a diameter. Therefore, there is a disadvantage that the installation space between the adjacent machines is large.

In a revolving type automatic winding machine having a contact roller having no drive source, the package being wound is separated from the contact roller at the time of turret, and the waiting bobbin contacts the contact roller. During this period (for example, for about 3 seconds), the contact roller is in free rotation. For this reason, the number of rotations of the contact roller decreases during the turret, and the yarn may be loosened and cut. Further, 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 the original value. For this reason, there is a defect that the yarn caught by the empty bobbin is loosened and cut, and a yarn spot is formed on the transfer tail and the inner layer yarn.

Further, in the turret type automatic winding machine described above, when switching to the thick winding, the yarn passing from the contact roller to the package being wound and the surface of the empty bobbin have a large winding angle in the opposite traveling directions. Due to the contact, the yarn may be loosened and the switching success rate may be reduced.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems associated with the above-mentioned conventional automatic switching winding machine and to provide a yarn switching winding machine having a small installation space.

Further, even when the present invention is applied to a winding machine with a contact roller having no drive source, the time required for the full package to separate from the contact roller and to contact the empty bobbin at the time of switching can be shortened. It is an object of the present invention to provide a yarn switching and winding machine that can reduce the speed fluctuation of a contact roller at the time of switching.

Still another object of the present invention is to provide a yarn switching and winding machine provided with a highly rigid support mechanism capable of always supporting a bobbin holder for winding the yarn in parallel with a contact roller. .

[0012]

SUMMARY OF THE INVENTION In the present invention, the above object is achieved by providing a plurality of bobbin holders, and when the package wound on one bobbin holder reaches a predetermined amount, the winding of the yarn is switched to the other bobbin holder. In the automatic switching winding machine as described above, a plurality of bobbin holders, a winding position, a doffing position, an empty bobbin mounting position, a standby position, a switching position and a closed-loop bobbin holder guide path for guiding along the winding position, This is achieved by a yarn switching winder comprising means for independently moving a plurality of bobbin holders along the bobbin holder guide path.

[0013]

According to the present invention, a plurality of bobbin holders can be independently moved along the bobbin holder guide path, so that the installation space is the sum of the maximum winding diameter of the package and the diameter of the empty bobbin, and the conventional turret type automatic bobbin. 3/4 of winding machine
Can be around.

Further, since the bobbin holder having the empty bobbin mounted thereon can be moved independently of the bobbin holder having the full bobbin mounted thereon, even when the bobbin holder is mounted on a spindle-driven automatic winding machine having no drive source, it is possible to move the bobbin holder. Since the bobbin holder can be located in the vicinity of the contact roller in advance, the time required for the full package to separate from the contact roller and contact the empty bobbin holder can be shortened. Therefore, at the time of switching, the rotation speed of the contact roller can be kept substantially constant.

Further, since the plurality of bobbin holders can be moved independently, the contact angle of the empty bobbin is smaller than that of the conventional turret type automatic winding machine in a state where the circumferential direction of the empty bobbin and the yarn traveling direction are opposite to each other. The size can be reduced, and the slack of the yarn and the fluffing of the yarn at high speed are reduced, and the automatic switching success rate is improved.

[0016]

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

FIGS. 1 to 6 show a method of switching yarns according to an embodiment of the present invention applied to a spindle drive type automatic switching winding machine in a time series manner, and FIG. FIG. 3B is a front view, and FIG. In the illustrated embodiment, four paper tubes (bobbins) are mounted on each bobbin holder, and four packages are formed at the same time. In FIG. The parts to be described are indicated by adding a to d to the reference numerals used in FIG. FIG. 7 is a drive system diagram of the above embodiment.

In FIG. 1 to FIG. 6, a machine frame 1 of a spindle-driven automatic switching winder according to the present embodiment is mounted on a base 2 having a pair of channels, and a slide block 3 is provided with a stroke bearing 4a, 4b (see FIGS. 1 (b) and 7), it is movably supported 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 right and left. The frame 6 rotatably supports the contact roller 15.

In FIG. 1, the paper tubes 9a to 9d are mounted on the bobbin holder 7 waiting at
The paper tubes 10a to 10d are mounted on a bobbin holder 8 that winds
11d is wound up.

The plate 12 is pushed in parallel to the bobbin holder 8 by a cylinder (not shown), and the package 1
Extrude 1a-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 are provided on the sliders 13 and 14,
The cam followers 13a, 14a are fitted in guide grooves (not shown) provided in the machine frame and supported so as to be movable.

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

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

A yarn regulating groove 18a is formed in a yarn pulling guide 18 provided on the frame 6 so as to face the yarn removing plate 19 (see FIG. 2B).

The motors 20, 21 are connected to bobbin holders 9, 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 frame, and the number of rotations 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 which engages with limit switches 26 and 27. The limit switch 26 checks the upper limit position of the slide block 3, and the limit switch 27 checks the lower limit position of the slide block 3. .

In FIG. 7, a pair of upper and lower sprockets 3 is shown.
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. The sprocket 38a is connected to the worm speed reducer 29.
Therefore, by rotating the worm speed reducer 29,
The sprocket 38a rotates, and the chain 38c moves along the track around the sprockets 38a and 38b together with the slider 13 so that the slider 13 is brought into 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 a slider 14 supporting the bobbin holder 7 via a joint 39d. Sprocket 39a
Is connected to the worm speed reducer 30. Therefore, by rotating the worm speed reducer 30, the sprocket 39a rotates, and the chain 39c moves around the sprockets 39a and 39b along the slider 14 along a track-shaped path, and the slider 14 is moved to a predetermined position by the cam follower 14a. Posture.

In FIG. 7, the chains 38c, 3c
9c is shown separated left and right.
Preferably, a and 39a are provided coaxially in front and back, and sprockets 38b and 39b are also provided coaxially in front and back so that the chains 38c and 39c take a path overlapping the front and rear. In this case, the worm speed reducer 29,
One of the sprockets 38a, 39 is connected to the other through a hollow shaft.
It is preferable to connect to a.

FIG. 9 shows a more specific embodiment in which the two chains take a path in which the two chains overlap one another.
It will be described later with reference to FIG.

The worm speed reducers 29, 30 are connected to electromagnetic switches 31, 32, respectively, and turn on / off the power of the worm speed reducer 29 according to a command from the computer 33.

The computer 33 has a random access memory (RAM) 34 and a read only memory (ROM)
35, a central processing unit (CPU) 36 and an input port (I / O) 37.

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

The bobbin holder 7 is on standby at a position retracted axially deeper by a distance 1 from the bobbin holder 8 being wound (see FIG. 1B). In this state, the inverter 2
The package 11 is wound around the paper tube 10 mounted on the bobbin holder 8 by driving the motor 21 through the package 3.

When the package 11 reaches a predetermined winding amount,
The motor 20 is started 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 by 1.02 to 1.1 times higher than the normal winding speed. Then, the bobbin holder 8 is moved to the position shown in FIG. at the same time,
The yarn removing plate 19 is swung by a cylinder (not shown) to remove the yarn Y traversed by the traverse guide 16 and put the yarn Y into the groove 18a formed in the yarn pulling guide 18 at the opposing position. The yarn Y is wound around the package 11 while being restricted to the positions corresponding to the yarn holding grooves 9a 'to 9d' of each of the paper tubes 9 mounted on the waiting bobbin holder 7,
The bunch windings 11a 'to 11d' are formed (FIG. 2B).
reference).

Next, as shown in FIG. 3 (a), the bobbin holder 7 is moved along a track-like path by the worm speed reducer 29, and the yarn Y is transferred to the yarn holding grooves 9a 'to 9c of the paper tubes 9a to 9d.
9d '(see FIG. 3B), a slight bunch winding is formed on the thread holding grooves 9a' to 9d '.

When the bobbin holder 7 is moved, the contact roller 15 is kept in contact with the bobbin holder 7 while being lifted upward by the cylinder 17.

Next, as shown in FIG. 4B, the bunch guide 18 is moved rightward (arrow A) in FIG. 4 by a cylinder (not shown), and the bobbin holder 7 is moved leftward by a cylinder (not shown). (Arrow B), a transfer tail is formed on the paper tube 9, and the yarn removing plate 19 is formed.
Undo.

The yarn Y is caught by the traverse guide 16 and the traverse motion is started by the traverse guide 16 to form a package on the bobbin 9.

When the yarn Y is switched from the package 11 wound on the paper tube 10 mounted on the bobbin holder 8 to the paper tube 9 mounted on the bobbin holder 7, the bobbin holder 8 is braked.

When the bobbin holder 8 stops, the chuck of the paper tube 10 is released by the push button. The package 11 is pushed out in the axial direction of the bobbin holder 8 by the package push-out plate 12 and is pulled out. The empty paper tube 10 is newly mounted on the bobbin holder 8 and chucked (FIG. 5).

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

When the amount of the package 20 wound around the paper tube 9 mounted on 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 procedure as described above.

Thereafter, the yarns Y are sequentially switched by the same method.

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 number of rotations 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 on the bobbin 10 becomes thick and the slide block 3 with the contact roller 15 pressed against the package 11 rises and the knocker 28 hits the limit switch 26, the electromagnetic switch 31
Is closed. The worm speed reducer 29 is driven, the sprocket 38a rotates, and the slider 13 (the bobbin holder 8 is slidably attached) connected to the chain 38c engaged with the sprocket 38a by the joint 38d.
Is gradually moved downward. When the knocker 28 attached to the slider 13 hits the limit switch 27, the worm speed reducer 29 is stopped.

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

The speed reduction ratio of the worm speed reducers 30 and 29 is set so that the worm speed reducers 30 and 29 do not drop due to the weight of the package wound around the bobbin holder. If the package descends due to its own weight, use a brake.

In the present embodiment, the bobbin holder on the standby side is moved in the axial direction at the time of switching, but a thread regulating guide may be inserted between the package and the empty bobbin as in the embodiment shown in FIG. .

In this embodiment, the bobbin holder being wound up at the time of switching is moved to the state shown in FIG. 2 and then the bobbin holder on the copy side is moved to the position shown in FIG. 3. However, the dimension between the package and the contact roller is a predetermined dimension. (Over the empty bobbin outer diameter)
When the movement is reached, the switching can be completed in almost the same time in the switching from empty to full winding, and the switching success rate of the small winding switching is improved. In this case, it is preferable that the moving distance of the worm speed reducer or the bobbin holder is detected by an encoder or the like.

In place of the worm speed reducer, a cylinder or other drive source may be used.

Although the present embodiment has been described with respect to the spindle drive type winder, the present invention can be applied to a friction drive type winder. In this embodiment, the movement trajectory of the bobbin holder is a track, but may be a circle, an ellipse, a triangle, a rectangle, or the like.

Further, another embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 9 is a front view of this embodiment, FIG. 10 is a sectional view taken along line XX of FIG. 9, and FIG.
It is XI sectional drawing.

Next, the configuration of this embodiment will be described with reference to FIGS. Note that the same or similar parts as those in the embodiment described above with reference to FIGS. 1 to 7 and 8 are denoted by the same reference numerals and description thereof is omitted.

As in the above-described embodiment, the machine casing 1 is mounted on the base 2 composed of a pair of channels.
The supporter 3 protrudes. The frame 6 is supported so as to be able to swing up and down around a fulcrum 54 provided on the supporter 3,
The traverse device 5 and the contact roller 15 are attached to the frame 6. In the present embodiment, a traverse device for traversing the yarn by guides rotating in opposite directions is used as the traverse device 5.

The bottom of the air cylinder 61 is connected to the cavity 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. It supplies the weight of the frame 6, the contact roller 15, and the traverse device 5, and applies a predetermined pressing force between the contact roller 15 and the bobbin holder 11 being wound.

In FIG. 9, the paper tube 9 is mounted on the bobbin holder 7 waiting at the copy position, and the paper tube 10 is mounted on the bobbin holder 8 on which the package 11 is wound.
The bobbin holders 7 and 8 are each driven by an electric motor (not shown) as in the above-described embodiment, and are known by a controller (not shown) so that the number of rotations of the contact roller 15 becomes a predetermined rotation during winding of the yarn. Is controlled by the following method.

The bobbin holder 7 is supported by a slider 13, and the bobbin holder 8 is supported by a slider 14.

After switching from the bobbin holder 8 with the full package 11 mounted thereon to the bobbin holder 7 with the paper core 9 mounted thereon, the bobbin holder 8 is moved to the position where the package 11 is taken out, and the paper core with the package 11 wound up at that position. 10
The plate 40 is pushed out in parallel with the bobbin holder 8 by a cylinder (not shown), and the package 11 is pushed out.

The machine frame 1 is formed with a hole 1a having an appropriate shape (in the illustrated embodiment, a parallelogram having rounded corners) penetrating in the axial direction of the bobbin holders 7, 8, and a bobbin holder around the hole 1a. Inner gears 65 and 66 having a predetermined trajectory along the guide path are fixed at intervals in the axial direction of the bobbin holders 7 and 8.

The slider 13 rotatably supports both ends of two shafts 67, 68. Gears 67a, 6
7b (not shown), and a gear 68a,
68b (not shown) are formed. Similarly, the slider 14 rotatably supports the two shafts 69, 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
Mesh with the inner gear 65, while the gears 67b, 68
b, 69b and 70b mesh with the inner gear 66.

In FIG. 10, a pair of arms 74a and 74b are attached to the shaft 70 so as to be swingable via needle bearings 82, respectively, and the ends of the arms 74a and 74b are separated from the shaft 70 by a predetermined distance. Cam followers 78a and 78b are respectively attached. Similarly, FIG.
As shown in FIG. 7, arms 71a and 71b are pivotally attached to the shaft 67, and the cam followers 75a and 7b are attached to the arms 71a and 71b.
5b is attached. The shaft 68 has an arm 72a,
A cam follower 76a, 76b is attached to the arm 72a, 72b. Further, arms 73a and 73b are pivotally attached to the shaft 69, and the arms 73a and 73b
The cam followers 77a and 77b are attached to the camshaft.

The cam followers 75a and 76a are provided on the outer peripheral surface (the 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, the cam follower 7 is provided on the outer peripheral surface of the member on which the inner gear 66 is formed.
5b, 76b, 77b and 78b engage.

Thus, the gears 67a, 68a, 6
9a, 70a and cam followers 75a, 76a, 77a,
78a sandwiches the inner gear 65, and the gears 67b, 6
8b, 69b, 70b and cam followers 75b, 76b,
The inner gear 76 is sandwiched between 77b and 78b,
The sliders 13 and 14 can move along the outer circumference of the inner gears 65 and 66.

Further, 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 connected to the slider 13 via the connecting rod 84 as shown in FIG. Are connected by Further, a chain 83 is stretched along the outer peripheral surface of the member of the inner gear 66, and the chain 83 is connected to the slider 14 via pins 85 a and 85 b via a connecting rod 85.

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

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

In FIG. 9, a guide device 95 provided on the machine frame 1 in opposition to the traverse device 5 applies the yarn Y removed from the guide 16 of the traverse device 5 to the ends of the paper tubes 9 and 10 when the yarn is switched. The transfer tail is formed by restricting the vicinity of the transfer tail, and the internal structure of the guide device 95 is omitted.

Next, the operation will be described. This operation is performed by a controller (not shown) including a computer (CPU).

In the steady winding state, the bobbin holder 8
When the package 11 is wound on the paper tube 10 mounted on the package 11 and the contact roller 15 pressed against the package 11 moves a small distance upward and a limit switch (not shown) is turned on, the servomotor 87 is started. You. Thus, when the bobbin holder 8 is lowered and the limit switch is turned off, the servomotor 87 stops. Hereinafter, the above operation is repeated according to the winding of the package 11.

When the package 11 reaches a predetermined winding amount,
Activate the copy bobbin holder 9. When the bobbin holder 9 reaches a predetermined number of rotations, the servo motor 86 is started to move the bobbin holder 8 holding the full package downward, detach from the contact roller 15, and fix it at a predetermined position.

During the 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 outer periphery of the bobbin holder 8 and the contact roller 1).
When the distance from the outer periphery of the bobbin 5 becomes the outer diameter of the bobbin), the yarn removing guide 19 is moved rightward in FIG. 9 by a cylinder (not shown), the yarn is removed from the traverse device 5, and the guide device 95 is used. While winding the yarn onto the package 11 near the end of the package 11 by a known method, the yarn gripping means of the paper tube 9 mounted on the bobbin holder 8 (in the present embodiment, a groove formed on the outer periphery of the paper tube) However, other means may be used).

Next, when the servomotor 87 is activated and the bobbin holder 7 is moved rightward in FIG. 9, the yarn is gripped by the yarn gripping means. When the bobbin holder 7 comes to a predetermined position, the servomotor 87 rotates. Stops. During this time, a small amount of bunch winding (stick winding) is formed near the gripping means.

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

A package (not shown) to be wound on a paper tube 9 mounted on the bobbin holder 7 is thickened, and the contact roller 1 is pressed against the package (not shown).
5 moves a small distance upward, a limit switch (not shown) is turned on, and the servo motor 86 is turned on.
Is started, and when the bobbin holder 7 is lowered and the limit switch is turned off, the servomotor 86 stops.

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

Next, the slider 14 supporting the bobbin holder 8 is moved up by the servo motor 86 to a stop position and stopped. At this position, the remaining bobbin holder 8 is on standby, and when the amount of thread wound on the bobbin holder 7 being wound reaches a predetermined amount, the bobbin holder 8 at the second position is held.
Is started, and the same operation as described above is repeated.

As described above, according to this embodiment, since the two bobbin holders are circulated in the minimum necessary space,
The distance between the weights can be reduced as compared with a conventional turret type winder. In addition, the bobbin holder can always be supported with high parallel accuracy and high rigidity with respect to the contact roller, and vibration of the bobbin holder can be suppressed during winding of the yarn.

In this embodiment, the inner gear (internal gear member) is used as the endless gear member. However, an outer gear (external gear member) having teeth on the outer periphery may be used. Further, instead of the inner gear of the present embodiment, a chain, a toothed belt, or the like may be fixed to the frame, and the bobbin holder may circulate by engaging with the chain, the toothed belt, or the like.

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

[0086]

According to the present invention, a plurality of bobbin holders can be independently moved along the bobbin holder guide path, so that the installation space is the sum of the maximum winding diameter of the package and the diameter of the empty bobbin. It can be reduced to about ／ of that of the automatic die winding machine, and the installation space can be reduced.

Further, since the bobbin holder with the empty bobbin mounted thereon can be moved independently of the bobbin holder with the full bobbin mounted, even when the present invention is applied to a spindle driven automatic winding machine having no drive source for the contact roller, Since the spare bobbin holder can be positioned in advance near the contact roller, the time required for the full package to separate from the contact roller and contact the empty bobbin holder can be shortened. For this reason, at the time of switching, the rotation speed of the contact roller can be kept substantially constant, and the control performance at the time of switching can be improved.

Further, since the plurality of bobbin holders can be moved independently, the contact angle between the empty bobbin and the circumferential speed of the empty bobbin is opposite to that of the conventional turret type automatic winding machine in a state in which the yarn traveling direction is opposite to that of the conventional bobbin. The size can be reduced, and the slack of the yarn and the fluffing of the yarn at high speed are reduced, and the automatic switching success rate is improved.

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

[Brief description of the drawings]

FIG. 1 (a) is a front view showing a thread switching method according to an embodiment of the present invention implemented in a spindle drive type automatic switching winding machine.

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

FIG. 2 (a)

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

FIG. 3 (a) is a front view showing a step subsequent to 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 a step subsequent to 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 a step subsequent to 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 a step subsequent to 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 present invention.

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

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

[Explanation of symbols]

 7 bobbin holder 8 bobbin holder 13 slider 14 slider 13a cam follower 14a cam follower 29 worm speed reducer 30 worm speed reducer 38a sprocket 38b sprocket 39a sprocket 39b sprocket 38c chain 39c chain 38d joint 39g axle gear 66a 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 83a servo follower 86a cam follower apparatus

Claims (5)

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