JP3681819B2 - Bobbin winder with flange - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for winding a yarn that is continuously supplied at a constant line speed in a yarn spinning step or a post-processing step, etc., onto a flanged bobbin while sequentially replacing the bobbin. The present invention relates to a winding device in which a thread spool for manually winding a winding start end on a flanged bobbin is provided adjacent to the outside of the flange portion of the bobbin.
[0002]
[Prior art]
For example, when winding a high tensile strength yarn such as a tire cord around a flanged bobbin, the spindle is actively driven by a variable speed motor or a torque motor, and the peripheral speed of the core portion of the flanged bobbin at the beginning of winding is determined by the yarn. In order to control the number of rotations to match the line speed of the thread, and to make the work of locking the winding thread start end to the bobbin safe and easy, the thread hook having a slit that sandwiches the winding thread start end is adjacent to the flange. The spool is fixed to the spindle. However, since the flanged bobbin has a much larger diameter than the diameter of the core, the transfer of the thread from the thread spool to the core of the flanged bobbin (the thread is the length of the bobbin). When changing the winding part by moving in the vertical direction), when the thread gets over the flange part of the bobbin, there is a big difference between the feed speed of the thread and the peripheral speed of the outer periphery of the flange part. Abnormal high tension due to frictional force acts on the yarn, and sudden braking due to the high tension acts on the bobbin and the spindle, and the load on the motor increases instantaneously. For this reason, the spindle decelerates rapidly, and when the yarn is wound around the core portion of the flanged bobbin, the peripheral speed of the bobbin core portion is substantially reduced due to the delay in the rise of the motor speed. This causes a problem that the yarn is loosened and the yarn is loosened in the middle of the yarn feeding system, causing unexpected troubles such as catching of the yarn in the middle of the yarn feeding system and separation from the guide roller.
[0003]
For this reason, in a conventional bobbin winder with a flange, for example, as described in Japanese Patent Laid-Open No. 61-64678, a slack absorbing mechanism including a dancing roller is provided in the middle of a yarn supply system, Absorbing the looseness of the strip is done.
[0004]
[Problems to be solved by the invention]
However, the loosening phenomenon when transferring the thread from the thread spool to the core part of the bobbin with flange is such that the higher the line speed of the thread, the more the diameter ratio between the flange part of the bobbin and the core part. The larger the value is, the more conspicuous it is. Therefore, there is a limit in the response speed of the slack absorbing mechanism using the dancer roller, and there is a problem that the apparatus becomes complicated to overcome this.
[0005]
Note that when the diameter of the thread hook spool is close to the diameter of the flange portion of the bobbin, the bobbin and the spindle are locked when the winding thread start end is wound around the thread spool and locked, as in the case where the thread gets over the flange. This is not preferable because a large torque load is applied to the motor and the motor rotation speed is reduced.
[0006]
Also, if the diameter of the thread hook spool is close to the diameter of the bobbin core, the motor will not suddenly decelerate when it is wound on the thread spool, but when the thread passes over the flange, Friction between the yarn and the outer periphery of the flange portion causes loosening of the yarn as described above.
[0007]
[Means for Solving the Problems]
The present invention has been made to overcome the above-mentioned conventional disadvantages and to smoothly perform threading work on a flanged bobbin. The threading spool provided adjacent to the flanged bobbin is connected to the spindle or bobbin with a clutch. The flanged bobbin rotates by driving in the winding direction with the minimum transmission torque necessary to pull the winding thread start end through the means, preventing an instantaneous motor load increase when winding on the thread spool. (In particular, the peripheral speed of the winding core) is set to an appropriate speed close to the supply speed (line speed) of the yarn. A spindle that carries a bobbin, a motor that actively drives the spindle in the yarn winding direction, a traverse guide that traverses the yarn along the length direction of the flanged bobbin, and the spindle A winding device comprising a yarn hooking spool provided adjacent to a flange portion of a flanged bobbin on the front end side, wherein the yarn hooking spool is connected to a rotating body including a spindle and a flanged bobbin. , Characterized in that it is attached via a clutch means that generates the minimum necessary transmission torque for pulling the winding thread start end, and by having such a configuration, the winding thread start end is larger in diameter than the core portion of the flanged bobbin. Even if the spool is wound and locked, a large torque load does not act on the spindle that supports the empty bobbin, and the increase in the speed of the empty bobbin for preparing to start winding is not obstructed. It is possible to increase the winding speed at the section and to prevent the yarn from loosening in the middle of the yarn feeding system.
[0008]
The invention according to claim 2 is characterized in that, in the invention according to claim 1, the outer peripheral edge of the yarn hooking spool is shaped so as to cover the outer periphery of the flange portion of the bobbin in a non-contact state. Thus, when the yarn is transferred from the spool winding portion to the bobbin winding core portion, it is possible to prevent the winding load from rapidly increasing due to the yarn coming into contact with the outer periphery of the flange portion of the bobbin.
[0009]
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the diameter of the winding start end winding portion of the yarn hooking spool is equal to or often smaller than the outer diameter of the flange portion of the bobbin. By providing such a configuration as a feature, the transition of the wound yarn from the yarn hooking spool to the bobbin core is smooth, and the change in the transmission torque at the clutch means is reduced.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show an example of a twin-screw turret type winding machine showing an embodiment of the present invention.
[0011]
Two spindles 1a and 1b are provided so as to be rotatably arranged at symmetrical positions on a concentric circle with respect to the turret board 2, and one spindle 1a is fixed to a traversing device 4 comprising a known real cam fixed at a fixed position. As shown in FIG. 1, the supply yarn Y is traversed by the traverse guide 5 and wound around the core portion 3a between the flanges 3b of the flanged bobbin 3 on the spindle 1a. I did it.
[0012]
The turret board 2 is rotatably provided with a peripheral edge supported by a small trochanter 7 in a through-hole 6a provided in the fixed machine frame 6, and a bearing member 2a and a support member 2b integrally connected to the rear portion of the turret board 2. The large gear 8 fixed to the rear part is meshed with the driving small gear 10 of the turret disk rotation motor 9 and driven to rotate in the direction indicated by the arrow X in FIG. 1, and each spindle 1a, 1b is connected to the turret. A pulley 12 is fixedly inserted into and supported by the bearing member 2a of the panel 2, and a pulley 12 is fixed to the end of the plate 2. The pulleys 12 and 12 are driven by the timing belt 13 with a tension pulley (not shown) interposed therebetween, and the pulley 17 fixed to the other end of the transmission shaft 14 and the pulley 19 of the intermediate shaft 18 are connected to the timing belt 2. Further, the pulley 21 at the other end of the intermediate shaft 18 and the driving pulley 22 for the cam shaft of the traverse device 4 are interlocked by the timing belt 25 from the driving pulley 24 of the driving motor 23. The spindles 1a and 1b and the traverse device 4 are driven at a predetermined rotation ratio.
[0013]
As the drive motor 23, a variable speed motor or a torque motor is used.
[0014]
Further, the spindles 1a and 1b are electrically controlled from the outside, respectively, or are provided with clutches 11a and 11b that mechanically control on / off in conjunction with the rotation of the turret board 2.
[0015]
On the other hand, the flanged bobbin 3 that is rotatably mounted integrally with the spindles 1a and 1b has a flange portion 3b having an outer diameter of 200 to 300 mm at both ends of a core portion 3a having a diameter of about 50 to 100 mm. This is integrally molded with a synthetic resin, and on the side surface on the tip side of each of the spindles 1a and 1b, as shown in detail in FIG. .
[0016]
The thread spool 30 is formed on a small diameter portion 33 formed at the tip of the slider 32 of the one-touch type holder 31 that is detachably attached to the small diameter portions of the spindles 1a and 1b protruding forward from the flange portion 3b of the bobbin 3. A disc-shaped boss 34 that is loosely fitted, and a flange cover 37 that integrally has a rib 36 that is fixed to the boss 34 with a bolt 35 and covers the outer periphery of the flange portion 3b of the flanged bobbin 3 in a non-contact state; Three or more, for example, four are attached in a detachable manner by concentrating shallow cup-shaped spools 38 that are in contact with the side surface of the flange cover 37 as a whole and are tapered so that the outer periphery is easily threaded. The pin 39 is fixed.
[0017]
The pin 39 prevents the bias due to the tightening in the center direction of the yarn sandwiched between the mating surfaces of the spool 38 and the flange cover 37, facilitates removal of the winding thread start end, and removes the pin 39. The spool 38 can be easily separated from the flange cover 37 to facilitate cleaning.
[0018]
40 is hooked when transferring the yarn Y following the winding start end sandwiched between the spool 38 and the flange cover 37 from the spool 30 to the core portion 3a of the bobbin 3, and the yarn is unwound by rewinding from the spool 30. A hook that prevents loosening.
[0019]
The one-touch type holder 31 has a slider 32 movably inserted in an axial direction in an outer cylinder 42 having a notch 41 protruding in a central hole 42a, and a compression spring 43 is contracted between the two. This is provided with a ring 44 and is engaged with a notch 41 provided in the outer cylinder 42 in a bowl-shaped groove 45 provided at the tip of the spindles 1 a and 1 b, thereby causing the slider 32 to move to the compression spring 43. The bobbin 3 is pressed against the end surface of the bobbin 3 by urging, and the bobbin 3 is engaged with hooks (not shown) on the spindles 1a and 1b (not shown) to prevent rotation.
[0020]
Further, the spool 38 loosely fitted to the small diameter portion 33 of the slider 32 has its center portion bulged slightly conically toward the tip side of the spindles 1a and 1b, and the side surface has a small diameter due to the elasticity of the spool 38 itself. The step 33 abuts against the stepped surface 33a of the portion 33, and the reaction force presses the boss 34 against the outer surface of the flanged bobbin 3. The frictional force acts as a clutch, and the entire thread spool 30 is moved to the bobbin 3. At the same time, a torque for rotating in the winding direction is generated. The elasticity of the spool 38 is assumed to be smaller than the elasticity of the spring 43.
[0021]
The transmission torque generated by the friction between the boss 34 and the bobbin 3 is a torque required to maintain a normal winding tension at a winding diameter equivalent to the diameter of the winding end of the yarn hooking spool 30. Is set to a smaller transmission torque.
[0022]
That is, since the yarn Y is wound around the yarn hooking spool 30 and the start end of the winding yarn is locked, the spool 30 is pulled from the flanged bobbin 3 without being loosened while the rotation of the spool 30 is delayed. Rotating in the same direction as the bobbin 3 with the necessary minimum transmission torque to reduce the load on the spindles 1a and 1b due to the tension of the yarn Y, while increasing the rotation speed for starting the winding of the flanged bobbin 3 to enable.
[0023]
The winding device according to the present invention has the above-described configuration. Next, the operation thereof will be described. The flanged bobbin 3 on the spindle 1b side is fully wound, and the motor 9 operates to operate the turret. When the board 2 rotates 180 ° in the direction of the arrow X shown in FIG. 1 and the spindle 1a revolves from the waiting position B to the winding position A and changes position, the clutch on the spindle 1b side that supports the fully wound bobbin 11b is automatically cut off and the load on the drive motor 23 is reduced, so that the spindle 1a carrying the empty bobbin connected to the drive motor 23 via the clutch 11a starts to rotate at a high speed.
[0024]
In this state, the operator cuts the tail thread of the full bobbin while pulling the yarn Y fed at a constant speed with one hand, and the winding start end of the yarn Y is threaded on the spindle 1a side. The spool 30 is manually wound.
[0025]
At this time, the spindle 1a is idling at a peripheral speed of the winding core portion 3a of the bobbin 3 with the flange equal to or higher than the supply speed of the yarn Y. When wound on the thread spool 30, the entire thread spool 30 rotates in the winding direction while sliding with respect to the flanged bobbin 3 from the time when the winding thread start end is locked to the thread spool 30.
[0026]
The rotational torque of the yarn hooking spool 30 at this time is transmitted by friction fitting between the boss portion 34 and the flange portion 3b of the flanged bobbin 3, and the transmission torque at this portion is the minimum necessary for pulling the winding yarn start end. Therefore, the yarn hooking spool 30 rotates in the winding direction with a delay from the flanged bobbin 3, thereby preventing a rapid increase in the tension of the yarn Y and suppressing an increase in the load on the spindles 1a and 1b. However, the speed-up rotation of the empty bobbin for starting the winding yarn is not hindered. In this state, when the yarn Y is transferred from the winding start end winding portion of the yarn hooking spool 30 to the winding core portion 3a of the empty flanged bobbin 3, the yarn Y is guided to the flange cover 36 of the yarn hooking spool 30. The flanged bobbin 3 is wound around the core part 3a of the bobbin 3 without contacting the flanged part 3b of the flanged bobbin 3, and then traversed by the action of the traverse guide 5 until full winding. Rolled up.
[0027]
In the above-described embodiment, the case where the bobbin 3 and a part of the yarn hooking spool 30 (the boss portion 34 in the embodiment) are brought into contact with each other to constitute the clutch means has been described. Spindles 1a and 1b or members that rotate integrally with the spindles 1a and 1b, for example, as shown in FIG. 4, a disk 32a is integrally provided on a part of the slider 32 of the holder 31, and the boss of the spool 30 is formed on the disk 32a. It is also possible to configure the clutch means by frictionally engaging the portion 34. In other words, any member that rotates integrally with the spindles 1a and 1b can be configured with a clutch mechanism interposed between members other than the bobbin 3. 4, the same reference numerals as those in FIG. 3 are given.
[0028]
【The invention's effect】
As described above, according to the invention described in claim 1 of the present application, the yarn winding spool that winds the winding start end is pulled over the rotating body that includes the flanged bobbin and the spindle that carries the flanged bobbin. Because it is attached via the clutch means that generates the minimum necessary transmission torque, the empty bobbin is supported even when the winding thread start end is wound around a spool having a larger diameter than the core of the flanged bobbin and locked. A large torque load does not act on the spindle, it does not hinder the speed increase of the empty bobbin for preparation of winding start, the winding speed at the core part of the flanged bobbin is increased, and the yarn in the middle of the yarn feed path Can be prevented.
[0029]
Accordingly, it is possible to omit the dancer device that has been conventionally provided in the yarn feeding system path, and it is possible to prevent unexpected yarn hooking mistakes such as detachment and catching of the yarn from the roller in the yarn feeding system path. effective.
[0030]
In the invention of claim 2 of the present application, when the yarn is transferred from the spool winding portion to the bobbin winding core portion, the winding load caused by the contact of the yarn with the outer periphery of the bobbin flange portion is reduced. The rapid increase can be prevented, the sudden deceleration of the empty bobbin at the start of winding can be prevented, and the steep high tension is prevented from acting on the yarn, thereby preventing the unexpected cutting of the yarn.
[0031]
Further, in claim 3 of the present application, when the diameter of the winding start end winding portion of the yarn hooking spool is equal to or smaller than the outer diameter of the bobbin flange portion, Since the transition of the wound yarn to the bobbin winding core is smooth and the change in the transmission torque at the clutch means is small, the effect of more reliably preventing the yarn from loosening at the beginning of winding is expected.
[Brief description of the drawings]
FIG. 1 is a front view of a biaxial turret type winding device to which the present invention is applied. FIG. 2 is a side view of a biaxial turret type winding device to which the present invention is applied. FIG. 4 is a cross-sectional view showing the structure of a hanging spool. FIG. 4 is a cross-sectional view showing another embodiment of a thread hanging spool that forms the main part of the present invention.
1a, 1b Spindle 3 Flange bobbin 3a Core part 3b Flange part 5 Traverse guide 23 Drive motor 30 Thread spool

Claims (3)

A spindle that carries a flanged bobbin, a motor that actively drives the spindle in the yarn winding direction, a traverse guide that traverses the yarn along the length direction of the flanged bobbin, and a tip end side of the spindle And a thread spool provided adjacent to the flange portion of the flanged bobbin, wherein the thread spool is wound around a rotating body including a spindle and a flanged bobbin. A bobbin winder with a flange characterized by being attached via clutch means for generating a minimum necessary transmission torque for pulling the yarn start end. The bobbin winder with a flange according to claim 1, wherein the outer peripheral edge of the yarn hooking spool covers the outer periphery of the flange portion of the bobbin in a non-contact state. The bobbin winding device for a flanged bobbin according to claim 1 or 2, wherein the diameter of the winding start end winding portion of the yarn hooking spool is equal to or often smaller than the outer diameter of the bobbin flange portion.

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