JP2004196470A - Yarn end capture ring of automatic tube replacement winder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yarn end capture ring of an automatic tube replacement winder that securely catches yarn at the time of paper tube replacement and can smoothly and stably implement automatic pipe replacement by securely maintaining the capture state. <P>SOLUTION: The yarn end capture ring (110) is equipped with a paper tube fitting part (112) that is fitted to a paper tube end part and holds a paper tube (20), and a flange part (113). The flange part (113) has a paper tube end face-contact region that comes in face-contact with a paper tube end face at the time of fitting of the paper tube (20), and a yarn introducing notch groove (114) that introduces and guides a winding start yarn end of the yarn winding body into the main body of the flange. An opening end on the paper tube fitting side of the yarn introducing notch groove (114) is arranged in the vicinity of a boundary part between the fitting part (112) and a paper tube abutting face of the flange part (113), and sandwiches yarn (Y) in the entire paper tube end face in the radial direction, in a region where the paper tube end face abuts on the inner face of the flange part (113). Therefore, the holding force is large, and not only failure of capture of the yarn (Y) but also detachment of the sandwiched yarn (Y) from the ring are prevented. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is applied to a yarn winding machine, particularly a yarn winding machine having a mechanism for automatically changing a paper core, and a yarn winding machine having an automatic pipe changing mechanism for continuously winding the yarn. Regarding the catching ring, specifically, catching the wound-up yarn end of the fully wound yarn winding body, leading it to the empty paper tube end arranged at the next winding position, and The present invention relates to a yarn end catching ring which is applied to an automatic tube rewinding machine which automatically winds a yarn around a tube and which is fitted to an end of a paper tube.
[0002]
[Prior art]
Conventionally, two paper tubes are arranged in series on the same axis, and when the winding of a predetermined length of yarn on one of the paper tubes is completed, the yarn is turned to the adjacent empty paper tube. After traversing and catching a part of the yarn in the empty paper tube by the yarn catching means, the yarn passed between the paper tubes is cut by the cutting means, and the yarn is rotated by rotation of the empty paper tube. 2. Description of the Related Art A yarn winding machine equipped with a so-called automatic paper tube changing mechanism for winding a yarn is known.
[0003]
Usually, the yarn catching means is provided on the paper tube.For example, a notch groove is formed at a part of the edge of the paper tube as the yarn catching means, and the yarn is sandwiched and held in the notch groove. Alternatively, an adhesive tape or the like is stuck to a part of the surface of the paper tube to adhere and hold the yarn. However, in the case where the yarn catching means is provided directly on the paper tube, a groove cutting process and an adhesive tape attaching process are required, which leads to an increase in the number of processes.
[0004]
Further, for example, when a notch groove is formed in a paper tube, the shape of the notch groove collapses during transportation, storage, or operation of the paper tube, making it impossible to catch the yarn. was there. For example, when an adhesive tape or the like is attached to the surface of a paper tube, as described in JP-A-7-172701, the attached portion protrudes from the surface of the paper tube by the amount of the adhesive tape. Therefore, unless the paper tube is crushed, the thread wound body cannot be removed from the paper tube, and even if it can be removed, parts other than the yarn end will adhere to the adhesive surface, The wound yarn at the end of the wound yarn may be pulled out to break the winding form.
[0005]
In order to eliminate such inconveniences, in recent years, for example, a donut disk-shaped yarn that is rotatably supported by a support bracket provided on a base without providing a yarn catching device in a paper tube, and has a yarn catching device. It has been practiced to fit the fitting portions of the end capturing ring to both ends of the paper tube, and to leave the above-described yarn capturing exclusively to the yarn end capturing ring. The use of this yarn end catching ring eliminates the need for special processing on the paper tube, and even if the paper tube is taken out from the yarn winding body, not only does the winding form not collapse, but also the yarn end catching means is attached to the paper tube itself. Since the paper tube is not provided, the paper tube can be repeatedly used, and the yarn end at the start of winding on the paper tube can be easily found. The structure of this yarn catching ring is similar to a flange fixed to a bobbin end disclosed in, for example, Japanese Patent Application Laid-Open No. 5-105333.
[0006]
[Patent Document 1]
JP-A-7-172701
[Patent Document 2]
JP-A-5-105333
[0007]
[Problems to be solved by the invention]
By the way, the structure of the linear body capturing ring disclosed in the conventional Patent Document 2 described above is such that the bobbins with flanges are sequentially connected in series, the striated body is wound around the bobbin by a predetermined amount, and then the traverser is moved to the next bobbin. The bobbin is moved to the winding start position, passed through a notch groove formed in the flange and inclined with respect to the axis of the bobbin, over the two flanges connected to each other, and is switched to the bobbin of the next bobbin. When a certain amount of the striated body is wound on a bobbin and the next bobbin is replaced, the striated body is successively replaced with an adjacent bobbin without cutting the striated body. At the time of rewinding, since the winding diameter is changed from the largest state to the smallest winding cylinder, local bending occurs at the part where the striated body is crossed, and strong tensile force and shear force act on the striated body. . For the striatum, especially for optical fibers, this bending must be avoided as much as possible.
[0008]
By the way, when a general fiber yarn is changed, the end between the winding end yarn end and the winding start yarn end between adjacent tubes is often cut. In such a case, it is sufficient that the wound yarn has the required strength, and there is no need to worry about excessive bending. FIGS. 8 and 9 show a conventional yarn end catching ring for a paper tube applied to such a conventional automatic yarn rewinding and winding machine. According to these figures, the yarn end catching ring 10 has a conical surface that fits into the paper tube end 21 and abuts against the inner peripheral edge 22 of the paper tube 20 when the paper tube is fitted. A paper tube fitting portion 11 to be held, and a thread introduction notch extending radially from an outer end of the paper tube fitting portion 11 to introduce and guide the wound-up yarn end of the yarn winding body into the flange body 13. A flange portion 12 having a groove 14. The thread introduction notch groove 14 has a thread introduction opening formed in the outer periphery of the flange body 13 and extends linearly along a chord passing through the opening, and a paper tube fitting side opening end 14a thereof is orthogonal to the chord. It is formed at a position beyond a straight line passing through the axis. The paper tube fitting-side bottom portion 14b is disposed on the axis side with respect to the paper tube end edge contact portion of the paper tube fitting portion 11 having a conical surface.
[0009]
Here, the traverse device moves, and the wound yarn end of the yarn winding body is formed into the yarn introduction notch groove formed in the flange main body 13 of the yarn end catching ring 10 holding the next empty paper tube 20. As shown in FIG. 9, while the guide is guided to the yarn introduction opening 14 and is moved and guided from the yarn introduction opening to the paper tube fitting side bottom portion 14 b, as shown in FIG. It is clamped at one point between the inner peripheral edge 22 of the tube 20. At this time, the next time the paper tube 20 is rotating in one direction, and the yarn held as described above is cut by cutting means (not shown) between the yarn end catching rings 10 adjacent on the same axis. It is cut and wound on the next empty paper tube 20, and a new winding starts.
[0010]
However, according to the conventional yarn end capturing ring 10, as described above, the yarn is captured at one point on the contact line between the inner peripheral edge of the paper tube 20 and the cylindrical surface of the yarn end capturing ring 10, that is, Since the pinching is performed at one point on the circumference where the inner peripheral edge of the cylindrical paper tube 20 and the conical surface are in contact with each other, the pinching force is weak, the pinched yarn is easily released, and so-called yarn trapping is performed. In this case, not only does the swinging, the form at the beginning of winding collapses, but also a problem that a loose thread portion enters a gap between peripheral equipments and is wound easily.
[0011]
The present invention has been developed in order to solve such a problem. The specific purpose of the present invention is to ensure that the yarn is caught at the time of changing the paper core, and that the caught state is reliably maintained, and that the automatic pipe is maintained. It is an object of the present invention to provide a yarn end catching ring in an automatic tube rewinding machine that can smoothly and stably perform a change.
[0012]
Means for Solving the Problems and Functions and Effects
The object of the present invention is to capture the wound-up yarn end of a fully-wound yarn winding body, which is the basic configuration of the present invention, and to guide it to an empty paper-tube end arranged at the next winding position. A yarn end catching ring applied to an automatic tube rewinding machine that automatically winds a yarn around an empty paper tube, wherein the yarn end catching ring clamps the yarn end at the start of the yarn winding with an empty paper tube. The yarn end catching ring has a paper tube fitting portion that is fitted to the end of the paper tube to hold the paper tube, and a paper tube end surface contact area that makes surface contact with the paper tube end surface when the paper tube is fitted. A flange portion having a thread introduction cutout groove for guiding the end of the winding start thread of the threaded body into the flange main body, and an opening end of the yarn introduction cutout groove on the paper tube fitting side is provided with the fitting. This is effectively achieved by the yarn end catching ring of the automatic tube rewinding machine, wherein the yarn end catching ring is disposed at the boundary between the attachment portion and the paper tube contact surface of the flange portion. .
[0013]
That is, in the present invention, the yarn is not captured and clamped at one point on the circumference of the inner peripheral edge of the paper tube end and the conical paper tube fitting portion of the yarn end capturing ring as in the related art. By moving the holding portion of the yarn between the paper tube end surface and the yarn end catching ring from the paper tube fitting portion to the inner surface of the flange portion, the yarn is wound in the region of the contact surface between the paper tube end surface and the inner surface of the flange portion. Since the end face is clamped in all radial directions, the gripping force is large and not only the yarn catching is not lost, but also the thread once clamped does not come off the ring, ensuring the next winding. And smoothly.
[0014]
It is preferable that the yarn introduction notch grooves are formed at two places with a phase difference of 180 ° at least in the flange part in order to ensure the capture of the yarn. Further, each notch groove is formed in the flange part. Extending in the chord direction beyond one half of the chord passing through a part of the peripheral surface to reach the bottom of the paper tube fitting side, the opposed inner surface of the notch groove extends from the open end of the paper tube fitting side to the flange surface. It is preferable that it is formed so as to be inclined toward the axis line toward it. The axis of the paper tube lies on a straight line passing through a half point of the chord and orthogonal to the chord.
[0015]
As in the present invention, the notch groove extends beyond the half of the chord passing through a part of the peripheral surface of the flange portion and extends in the chord direction and communicates with the bottom portion on the paper tube fitting side. Is guided by the groove and guided to the winding-side peripheral surface of the end of the paper tube. Therefore, as described above, the yarn held between the end surface of the paper tube and the inner surface of the flange is reliably wound around the paper tube peripheral surface through the bottom of the yarn introduction cutout groove. In addition, since the opposite side surface of the thread introduction notch groove is inclined toward the axis side from the opening end of the paper tube fitting side toward the flange surface, the yarn passing through the notch groove is the surface of the yarn end catching ring on the paper tube side. It is guided close and winds around from the end of the paper tube.
[0016]
Further, in the present invention, if the sharp claw portion formed on the surface side of the yarn end catching ring by the yarn introduction cutout groove is curved outward from the base end side to the tip end, the rotation of the yarn end catching ring can be achieved. By so doing, the yarn passing through the peripheral surface of the flange portion can be reliably introduced into the yarn introduction side opening of the yarn introduction cutout groove and captured, which is preferable.
[0017]
In the present invention, it is preferable that the outer diameter D1 (mm) of the paper tube fitting portion and the inner diameter D2 (mm) of the paper tube satisfy the following relational expression (1). The paper tube fitting portion has a cylindrical shape. The relationship between the outer diameter D1 (mm) and the inner diameter D2 (mm) of the paper tube is “D2-0.5 <D1 ≦ D2... (1)”, that is, the outer diameter D1 of the paper tube fitting portion is defined as paper. If it is set to be equal to the inner diameter D2 of the pipe or is set to a small value within the range of 0 to 0.5 mm, it becomes easy to fit the paper tube fitting portion to the paper tube, and furthermore, the paper tube is fixed by the yarn end catching ring. It can be securely held without rattling. When the length L1 in the direction parallel to the axis of the paper tube fitting portion is set to 2 to 5 mm, the fitting strength of the paper tube fitting portion to the paper tube can be secured.
[0018]
Further, in the present invention, the length L2 (mm) in the radial direction from the central hole to the outer peripheral edge of the paper tube end contact surface of the flange preferably satisfies the following relational expression (2).
t / 2 <L2 <t (2)
Here, t indicates the thickness (mm) of the paper tube.
When the length L2 in the radial direction of the paper tube end contact surface of the flange portion is equal to or less than 1/2 of the wall thickness t of the paper tube, a bottom opening end is formed on the inner surface of the yarn introduction cutout groove on the paper tube fitting side. As a result, the pinching force of the yarn is reduced, and when the thickness exceeds the thickness t of the paper tube, the peripheral surface of the flange is exposed outside the peripheral surface of the paper tube, and the driving device rotates in contact with the peripheral surface of the winding body. It is not preferable because the length accuracy of the roll and the alignment accuracy at the beginning of winding are strictly required. If a groove for traverse is formed in the peripheral surface of the drive roll, the exposed portion of the flange may restrict the traverse of the yarn.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.
FIG. 1 shows an example of the structure of a main part of an automatic tube rewinding machine for a paper tube with a yarn end catching ring according to the present invention. This figure shows a state when the pipe change is about to be performed.
[0020]
As viewed from the front, two paper tubes 20 are arranged on the left and right sides, and the yarn end catching ring 110 of the present invention is fitted to the opposite end 21 of each paper tube 20. At each outer end of the paper tube 20, a paper tube holding ring 110 ′ having a known configuration is fitted. The yarn end catching ring 110 fitted to the opposing end 21 of the adjacent paper tube 20 and the paper tube holding ring 110 ′ disposed outside each have a known configuration of a pair of left and right moving arms 30. It is rotatably supported by the upper end support portion. The moving arm 30 is moved forward and backward between a rear paper tube mounting position and a front yarn winding position by a guide member 31 fixed to the left and right frames of the machine base.
[0021]
A pair of front and rear rotating rolls 32 are arranged at a required interval immediately below each paper tube 20 at the yarn winding position, and one of the rotating rolls 32 is actively driven by a driving source (not shown). The other rotating roll 32 is supported by a frame or the like so as to be freely rotatable. A traverse guide 33 of the yarn Y that reciprocates in parallel with the axis of the paper tube 20 is disposed in front of (in front of) the rotary rolls 32. Further, a rotating belt 34 is disposed in the front-rear direction at the center of the space sandwiched by the moving arms 30 on the opposite end surfaces of the left and right paper tubes 20. A thread guide piece wheel 35 is attached to the rotating belt 34, and at the time of pipe replacement, the rotating belt 34 is driven rearward (to the far side in the drawing) to move the thread guide piece wheel 35 from the front standby position. Move to the rear yarn guide position. When the pipe change is completed, the thread guide piece wheel 35 returns to the standby position.
[0022]
Further, a pair of chevron guide pieces 36 are provided at the front positions of the opposite ends of the left and right rotating rolls 32 so as to protrude upward at the time of pipe replacement and to hook and guide the yarn Y. Further, a table 37 is provided in front of the chevron guide pieces 36, and the table 37 has a single slit 38 extending over the left and right paper tube regions. A reciprocating member (not shown) is disposed below the slit 38. When the yarn is wound on one of the paper tubes 20, the reciprocating member is immobilized on the slit end of the paper tube 20. When the pipe replacement starts, the pipe moves to the slit end on the empty paper tube 20 side. A thread guide 39 having a guide wheel 39a is fixed to the reciprocating member, and reciprocates along the slit 38 together with the reciprocating member.
[0023]
The configuration of such a winder is conventionally known, and can be arbitrarily adopted as long as it has a similar function, and is not particularly limited to the illustrated example. In the above description, the characteristic member of the present invention is the yarn end capturing ring 110.
2 to 6 show the configuration of the yarn end catching ring 110 according to the present embodiment. 2 is a front view of the capturing ring 110 as viewed from the paper tube fitting side, FIG. 3 is a sectional view taken along the line III-III of FIG. 2, and FIG. FIG. 5 is an enlarged sectional view of a portion A in FIG.
[0024]
As can be understood from these figures, the yarn end catching ring 110 according to the present embodiment has a support shaft fixing hole 111 formed in the center, and is rotatably supported by the moving arm 30 in the support shaft fixing hole 111. A flange-side shaft portion of a support shaft with flange (not shown) is inserted, and the flange portion is fixed to a fixing surface around the support shaft fixing hole 111 by a fixing tool such as a bolt and a nut (not shown).
[0025]
A circular ring-shaped paper tube fitting portion 112 is formed so as to protrude from the outer peripheral surface of the front end of the thread end catching ring 110. Further, a flange 113 extending in the radial direction is provided on the rear half of the outer peripheral surface of the paper tube fitting portion 112. Here, the paper tube fitting region of the paper tube fitting portion 112 is a cylindrical fitting portion 112b whose outer surface is a cylindrical shape, and a paper tube insertion portion extending continuously from an end of the cylindrical fitting portion 112b. The region is a tapered truncated cone-shaped paper tube insertion portion 112a. On the other hand, as shown in FIG. 3, the inner surface of the flange portion 113 on the paper tube fitting side projects radially at right angles from the cylindrical surface of the cylindrical fitting portion 112b. Therefore, the peripheral surface of the cylindrical fitting portion 112b and the surface of the flange portion 113 on the paper tube fitting side are orthogonal to each other.
[0026]
Two thread introduction notch grooves 114 are formed in the flange portion 113 in parallel with each other with a phase difference of 180 ° as in the related art. Each thread introduction notch groove 114 is formed to penetrate the front and back surfaces of the flange portion 113. These thread introduction notch grooves 114 are orthogonal to a straight line L passing through the center of the axis of the yarn end catching ring 110, and a string crossing the straight line at a right angle with a part of the peripheral surface of the flange portion 113 as a yarn introduction opening. It extends linearly to the groove bottom 114c in the middle of S.
[0027]
Further, as shown in the cross section in FIG. 3, the thread introduction notch groove 114 is displaced at the opening end position on the front and back sides of the flange portion 113. That is, the strings S1 and S2 are different from the paper tube fitting side opening end 114a at the bottom 114c of the thread introduction notch groove 114 and the outer surface side opening end 114b opposite to the paper tube fitting side opening end 114a. And the inner surface facing the upper surface is inclined toward the front and back surfaces. When the inner surface facing the thread introduction notch groove 114 is inclined, the yarn Y introduced into the thread introduction notch groove 114 is directed toward the center of the ring, so that the yarn Y can be easily wound around the empty paper tube 20. Become.
[0028]
The most distinctive feature of the present invention is that the paper tube fitting portion 112 and the inner surface of the flange portion 113 on the paper tube fitting side are orthogonal to each other in cross section as described above. As shown, the position of the paper tube fitting side opening end 114a at the bottom 114c of the thread introduction notch groove 114 is adjusted by the cylindrical fitting portion 112a of the paper tube fitting portion 112 and the paper tube end surface of the flange portion 113. This is the point around the boundary with the contact surface.
[0029]
By setting the formation position of the paper tube fitting side open end 114a at the boundary area B in this manner, the thread is inserted into the conical paper tube between the inner peripheral edge of the paper tube end portion and the yarn end catching ring as in the related art. Instead of catching and holding at one point on the circumference with the attachment portion, the holding portion of the yarn Y by the end face of the paper tube 20 and the yarn end catching ring 113 is moved from the paper tube fitting portion 112 to the flange portion 113. At the same time, in order to make the periphery B of the boundary between the paper tube end surface and the paper tube contact surface of the flange portion a region for holding the yarn Y, the yarn Y can be held in all radial directions of the paper tube end surface. The gripping force is greatly increased as compared with the conventional one, and not only does the yarn Y catch no longer miss but also the once held yarn Y does not come off the yarn end catching ring 113, and the next winding Picking can be performed reliably and smoothly.
[0030]
Further, in the present embodiment, the thread introduction notch groove 114 is formed at two places in at least the flange portion 113 with a phase difference of 180 °. Therefore, the time for capturing the yarn Y is reduced. Further, the groove bottom portion 114c of each of the thread introduction notch grooves 114 is set at a position exceeding one half of the length of a chord passing through a part of the peripheral surface of the flange portion 113. When the groove bottom portion 114c of the thread introduction notch groove 114 is set at a position exceeding one half of the length of the chord, the yarn Y introduced into the yarn introduction notch groove 114 is At the end of the empty paper tube.
[0031]
Therefore, as described above, the yarn Y sandwiched between the end surface of the paper tube and the inner surface of the flange portion 113 passes through the bottom 114c of the yarn introduction cutout groove 114 and is securely wound around the paper tube peripheral surface. Further, the inner surface of the thread introduction notch groove 114 facing the inner side is inclined toward the axial line from the opening end 114a on the paper tube fitting side to the outer surface (rear surface) of the flange portion 113 on the opposite side to the paper tube fitting portion 112. Therefore, as shown in FIG. 2, the yarn Y that has passed through the cutout groove 114 is guided near the peripheral surface of the empty paper tube 20 held by the yarn end catching ring 110, and is wound around the end of the paper tube. Become like
[0032]
Further, according to the present embodiment, as shown in FIG. 6, the sharp claw 113a on the surface side of the yarn end catching ring 110 formed by the yarn introduction cutout groove 114 is moved outward from its base end to the tip. It is curved. By bending the claw portion 113a outward, the yarn Y passing through the outer peripheral surface of the flange portion 113 of the rotating yarn end catching ring 110 is surely introduced into the yarn introduction opening 114a of the yarn introduction cutout groove 114. Can be captured.
[0033]
In the present embodiment, the insertion portion 112a on the distal end side of the paper tube fitting portion 112 has a truncated cone shape, and the cylindrical fitting portion 112b on the flange portion 113 side has a cylindrical shape. As described above, the outer diameter D1 (mm) of the paper tube fitting portion 112 and the inner diameter D2 (mm) of the paper tube 20 satisfy the following relational expression (1). The outer diameter D1 (mm) of the cylindrical fitting portion 112b and the inner diameter D2 (mm) of the paper tube 20 have a relationship of ((D2-0.5) <D1 ≦ D2 ... (1)), that is, the cylindrical shape. The outer diameter D1 of the shape fitting portion 112b is set to be equal to the inner diameter D2 of the paper tube 20, or set smaller within a range of 0 to 0.5 mm.
[0034]
By satisfying such a relationship, it becomes easy to fit the paper tube fitting portion 112 to the paper tube 20, and the paper tube 20 is not rattled by the cylindrical fitting portion 112b of the thread end catching ring 110. It will be held securely. At the same time, if the length L1 of the cylindrical fitting portion 112b in the direction parallel to the axis of the paper tube fitting portion 113 is 2 to 5 mm, the fitting strength of the paper tube 20 to the paper tube fitting portion 113 is increased. Is secured.
[0035]
Further, in the present embodiment, the length L2 (mm) from the peripheral edge of the central hole to the outer peripheral edge of the paper tube end contact surface of the flange portion 113 satisfies the following relational expression (2).
t / 2 <L2 <t (2)
Here, t indicates the thickness (mm) of the paper tube.
[0036]
When the length L2 in the radial direction of the surface of the flange portion 113 in contact with the end surface of the paper tube is equal to or less than の of the thickness t of the paper tube 20, the inner surface of the thread introduction notch groove 114 on the paper tube fitting side. Since the opening end of the groove is formed, the holding length with respect to the yarn Y is shortened and the gripping force of the yarn Y is reduced. The length of the drive roll 32, which is exposed to the outside from the peripheral surface and rotates in contact with the peripheral surface of the winding body, must be controlled with high accuracy. Alignment accuracy at the beginning of winding is also strictly required. When a groove for traverse is formed on the peripheral surface of the drive roll 32 that rotates the roll 200 by contacting the roll 200, the outer peripheral exposed portion of the flange portion 113 is formed of the yarn Y. It is not preferable because traverse may be regulated.
[0037]
In the yarn end catching ring 110 having the above-described configuration, the yarn Y captured by the ring 110 and gripped between the paper core 20 is filled with the wound core 200 and the empty paper core 20. The thread end catching ring 110 rotating together with the paper tube 20 is mounted on the surface opposite to the paper tube side, and cut by the cutting ring 120 fixed to the moving arm 30. As shown in FIGS. 3 and 6, the cutting ring 120 has a fan-shaped large-diameter portion 122 integrally formed in a substantially 90 ° arc on the outer peripheral surface of a small-diameter ring body 121. On the fitting surface of the cutting ring 120 with the yarn end catching ring 110, a circular ridge and a fan-shaped ridge that can be fitted corresponding to two circular grooves 110a and 110b formed concentrically with the ring 110 are provided. Is formed. Further, a cutting blade 123 is protruded from a part of the outer surface of the small diameter ring body 121.
[0038]
A bearing shaft (not shown) is inserted through a central hole 111 of the yarn end catching ring 110, a central hole 124 of the cutting ring 120, and a bearing (not shown) provided at an upper end of the moving arm 30. One end is fixed to the yarn end catching ring 110, and the other end is rotatably supported by the bearing of the moving arm 30. On the other hand, as described above, the cutting ring 120 fitted to one surface of the yarn end capturing ring 110 has the other end surface fixedly attached to the moving arm 30.
[0039]
Thus, the paper tube fitting portions 112 of the thread end catching ring 110 supported by the pair of left and right moving arms 30 are fitted to both ends of the empty paper tube 20, and the paper tube 20 is rotatably held. Therefore, in addition to the reciprocating movement of the pair of left and right moving arms 30 back and forth, the moving arms 30 can be moved in the approaching direction and the separating direction by a ball screw with a reverse screw (not shown).
[0040]
Next, the wound-up yarn end of the wound body 200 which is arranged on the left side of FIG. The procedure for automatically transferring the yarn Y to the empty paper tube 20 while automatically transferring the yarn Y to the paper tube 20 will be specifically described with reference to FIGS. . FIG. 1 shows a state immediately before the yarn Y having a predetermined length is wound around the winding body 200 and is fully transferred to the adjacent empty paper tube 20. At this time, the empty paper tube 20 waiting on the right side of the drawing is in the standby position behind the machine stand while being held by the moving arm 30 as described above.
[0041]
Now, the wound-up yarn Y shown by a solid line of the wound body 200 that is full in FIG. 1 is guided through a traverse guide 33 that reciprocates left and right in front of the wound body 200. When the thread reaches the position 1, the angled guide piece 36 which has been waiting below the yarn running surface projects above the yarn running surface, and the angled guide piece 36 is moved from the traverse guide 33 which continues traverse to the yarn. Remove Article Y and receive. At this time, the moving arm 30 moves from the standby position to the front winding position while being guided by the guide member 31. At this winding position, two front and rear rotating rolls 32 are arranged, and one or both of the rotating rolls 32 are driven by a driving source (not shown).
[0042]
Immediately before the moving arm 30 is moved to the winding position, as shown by the imaginary line in FIG. 1, after the thread guide 39 on the table 37 moves to the right side of the drawing along the slit 38, the rotating belt 34 Starts rotating to move the thread guide wheel 35 fixed to the belt 34 to the rear thread guide position, and then stops the rotation of the rotating belt 34. The movement of the yarn guide 39 toward the pipe changing side, the upward movement of the angled guide piece 33, and the movement of the yarn guide piece wheel 35 to the yarn guide position allow the yarn Y shown by the solid line in FIG. The state is indicated by a line.
[0043]
Here, while the traverse guide 33 arranged on the right side of the figure moves further to the left side than the position shown in the figure, the traverse guide 33 receives the yarn Y indicated by the imaginary line, and returns at the leftmost position to move Is started, the yarn Y guided by the yarn guide wheel 35 is, as shown in FIG. 7A, the peripheral surface of the flange portion 113 of the yarn end catching ring 110 which rotates together with the empty paper tube 20. In sliding contact with When the yarn end catching ring 110 further rotates, the yarn Y is guided by the claw 113a formed by the yarn introduction notch groove 114, as shown in FIGS. 7B and 7C, and the yarn introduction is performed. It is introduced into the groove through the opening 114a, and moves to the bottom of the groove 114 as shown in FIG.
[0044]
During this movement, the yarn Y to which a required tension is applied by the movement of the traverse guide 33 enters the contact surface between the end surface of the paper tube 20 and the flange portion 113, and as shown in FIG. It reaches the fitting-side opening end 114a of the groove bottom 114c formed at the boundary between the cylindrical fitting part 112b of the fitting part 112 and the fitting-side surface of the flange part 113, and has the cylindrical shape of the paper tube fitting part 112. In a boundary region between the fitting portion 112b and the fitting-side surface of the flange portion 113, a predetermined length is sandwiched and fixed.
[0045]
While the yarn Y is being clamped, the yarn end catching ring 110 further rotates together with the empty paper tube 20 while the yarn Y is being unwound from the adjacent winding body 200 (see FIG. 1). Also at this time, the cutting ring 120 is fixed to the moving arm 30 and is in a stationary state. The yarn Y caught by the rotation of the yarn end catching ring 110 is also rotated along with its catching portion, and is fixed to the fan-shaped large-diameter portion 122 of the cutting ring 120, and is located on the downstream side in the rotation direction of the yarn end catching ring 110. The yarn Y is cut while leaving the yarn end on the side opposite to the empty paper tube 20 side while maintaining the state of holding the yarn Y by the cutting blade 123 which is immovably disposed at the end.
[0046]
Conventionally, at the time of this cutting, as shown in FIG. 9, the yarn Y is held at one point between the paper tube 20 and the tapered paper tube fitting portion 11 of the yarn end catching ring 10. The yarn Y is pulled out from the holding portion, and the yarn Y is wound around the cutting ring 120 without being cut, or the moving arm 30 or the peripheral device Could be entangled with it, making it impossible to wind it up. In this regard, according to the present invention, as described above, at least the thickness of the paper core 20 in the surface contact area between the end surface of the paper core 20 and the inner surface of the flange portion 113 of the yarn end catching ring 110 is used. Since the Y is sandwiched, the gripping force is significantly increased, and the cutting blade 123 reliably cuts the Y. As a result, the automatic pipe change is performed stably, and the continuous winding of the yarn Y is enabled.
[0047]
It should be noted that the above-described embodiment merely shows a typical example of the present invention, and that those skilled in the art can make various modifications within the scope of the technical matters described in the claims. It will be clear from the above description.
[Brief description of the drawings]
FIG. 1 is a perspective view of a main part of an automatic pipe changing yarn winding machine to which a yarn end catching ring of the present invention is applied, as viewed obliquely from the front.
FIG. 2 is a front view showing a typical embodiment of the yarn end catching ring of the present invention as viewed from a paper tube fitting side.
FIG. 3 is a sectional view taken along the line III-III in FIG. 2;
FIG. 4 is a rear view of the yarn end catching ring as viewed from a side opposite to a paper tube fitting side.
FIG. 5 is an enlarged sectional view of a portion A in FIG. 3;
FIG. 6 is an exploded perspective view showing a structure of a paper tube fitted with the yarn end catching ring and a cutting ring fitted to the yarn end catching ring.
FIG. 7 is an explanatory view showing a procedure at the time of catching a yarn by the yarn end catching ring and the cutting ring.
8 is a sectional view of a conventional yarn end catching ring corresponding to FIG.
FIG. 9 is an enlarged sectional view of a portion B in FIG. 8;
[Explanation of symbols]
10,110 Thread end catch ring
11 Paper tube fitting
12,113 Flange part
13 Flange body
14 Thread introduction notch groove
14a Paper tube fitting side opening
14b groove bottom
20 paper tube
21 Paper core end
22 Inner edge
30 Moving arm
31 Guide member
32 rotating roll (drive roll)
33 Traverse Guide
34 Rotating belt
35 Thread Guide Car
36 Yamagata Guide
37 tables
38 slit
39 yarn guide
39a Guide car
110 'paper tube retaining ring
111 Shaft fixing hole (center hole)
112 Paper tube fitting
112a truncated cone insertion part
112b cylindrical fitting
113a claw
114 thread introduction notch groove
114a Open end of paper tube fitting side
114b Open end opposite side (outside) of paper tube fitting side
114c groove bottom
120 Cutting ring
121 Small diameter ring
122 Large diameter part
123 cutting blade
124 central hole

Claims (6)

The winding end of the fully wound yarn winding is caught and guided to the end of an empty paper tube arranged at the next winding position, and the yarn is automatically wound on the empty paper tube. A yarn end catching ring that is applied to an automatic tube rewinding machine that winds and holds a yarn end at the beginning of yarn winding between an empty paper tube and
The yarn end catching ring is a paper tube fitting portion that is fitted to the end of the paper tube to hold the paper tube;
A flange portion having a paper tube end surface contact area that is in surface contact with the paper tube end surface when the paper tube is fitted, and having a thread introduction notch groove for introducing and guiding the winding end of the yarn winding body into the flange main body; Equipped with
An opening end of the thread introduction notch groove on the paper tube fitting side is arranged around a boundary between the fitting portion and the paper tube contact surface of the flange portion.
A yarn end catching ring for an automatic pipe rewinding machine. The thread introduction notch grooves are formed in the flange portion at at least two places with a phase difference of 180 °, and each notch groove extends over a half of a chord passing through a part of a peripheral surface of the flange portion. It extends in the chord direction and reaches the bottom of the paper tube fitting side, and the opposing surface of the cutout groove is formed so as to be inclined toward the axis from the opening end of the paper tube fitting side toward the flange surface. The yarn end catching ring according to claim 1, wherein The yarn end catching ring according to claim 2, wherein the sharp claw portion formed by the yarn introduction notch groove is curved outward from a base end side to a front end thereof. The outer diameter D1 (mm) of the paper tube fitting portion and the inner diameter D2 (mm) of the paper tube satisfy the following relational expression (1): The yarn end catching ring as described.
(D2-0.5) <D1 ≦ D2 (1) The yarn end catching ring according to any one of claims 1 to 4, wherein a length L1 in a direction parallel to the axis of the paper tube fitting portion is 2 to 5 mm. The length L2 (mm) in the radial direction from the center hole of the paper tube end contact surface of the flange portion to the outer peripheral edge satisfies the following relational expression (2): 6. The yarn end capturing ring according to any one of claims 5 to 5.
t / 2 <L2 <t (2)
Here, t indicates the thickness (mm) of the paper tube.

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