JP2000007220A - Vane traversing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vane traversing device capable of transporting thread to a rotary vane across a turn-around point during runout of thread to surely prevent winding on a rotor on which the rotary vane is mounted. SOLUTION: A vane traversing device includes a thread guide 1 having a guide plane 1a for forming a traversing track, two rotary vanes 2 arranged up and down in the moving direction of thread and rotated in mutual opposition along the thread guide 1 for delivering the thread at a turn-around point on the traversing track and a resistance granting member 41 for granting resistance to the thread Y2 pulled from the guide plane 1a into the rotational center of the rotary vane 2 by the rotary vane 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade traverse device capable of transferring a yarn between two rotating blades rotating in opposite directions, and more particularly to a blade traversing device to which the rotating blade to which the rotating blade is attached has a thread breakage. The present invention relates to a device provided with a means for preventing winding of a thread.

[0002]

2. Description of the Related Art As a blade traversing device of this kind, two rotating blades are rotated in opposite directions along a yarn guide for forming a traversing locus of a yarn having folding points at both left and right ends to traverse the yarn. At the same time, there is known an arrangement in which the yarn can be transferred between two rotating blades at the turning point.

[0003]

However, in the conventional blade traverse device, if a yarn break occurs on the upstream side and free yarn is generated, the yarn reaching the blade traverse device is slackened, and the yarn at the turning point is turned off. However, there is a problem that the thread is carried over the turning point by the rotating blade, and the free thread may be wound around the rotating body at the root of the rotating blade.

When the thread is wound around the rotating body, it is necessary to remove the wound thread. However, since the rotating body at the root of the rotating blade is located in a narrow place constituting the driving device, If the main part of the blade traverse device is not disassembled, it cannot be removed unless it is disassembled. As described above, in the conventional blade traverse device, it was not possible to prevent winding of the wound yarn at the time of yarn breakage.

Accordingly, the present invention has been made in view of such a problem of the prior art, and when the yarn breaks, the yarn is carried by the rotating blade beyond the turning point, and the rotating blade is attached to the rotating blade. It is an object of the present invention to provide a blade traverse device capable of reliably preventing winding around a body.

[0006]

According to the first aspect of the present invention, there is provided a yarn guide having a guide surface for forming a traverse trajectory, and the yarn guide is provided above and below in a yarn traveling direction. The two rotating blades that rotate in opposite directions along each other and transfer the yarn at the turning point of the traverse locus, and the yarn drawn from the guide surface by the rotating blade toward the rotation center of the rotating blade. And a resistance applying member for applying resistance.

[0007] Empirically, free yarn generated at the time of yarn breakage is caught by the upper rotating blade via the guide surface, and heads toward a rotating body to which the rotating blade is attached. Therefore, the yarn moves along a trajectory from the vicinity of the turning point of the traverse to the rotating body via the rotating blade. Focusing on the movement of this trajectory, if a resistance imparting member is provided on the trajectory of the yarn such that the resistance increases along with the movement along the trajectory, the yarn entrained by the rotating blade comes off the rotating blade, The thread does not go to the rotating body.

According to a second aspect of the present invention, there is provided the blade traverse device according to the first aspect, wherein a thread hooking portion is provided at a tip end of the rotary blade.

When the yarn breaks, the yarn is carried while sliding from the tip end of the upper rotating blade toward the rotating body. The yarn being transported stops at the yarn hooking portion, and the yarn heading toward the rotating body is guided along with the rotation of the rotating blades. For this reason, reproducibility is generated in the trajectory of the yarn from the turning point toward the rotating body via the rotary blade, and the yarn is reliably guided to the resistance applying member.

According to a third aspect of the present invention, the resistance applying member forms a wedge between a resilient member and the yarn guide, and the resistance is increased by cutting the yarn into the wedge. Item 10. A blade traverse device according to Item 1.

When the yarn breaks, the yarn follows the path of movement along the yarn guide. Therefore, when a resilient member is attached to this portion so as to form a wedge jointly with the lower surface, the yarn moves to the wedge as the yarn moves. It is possible to form a resistance imparting member that bites and increases resistance.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a main portion of the blade traverse device of the present invention, FIG. 2 is a diagram showing a thread transfer state at a left turn point A, and FIG. 3 is a thread transfer state at a right turn point B. FIG.

In a spinning winder, a plurality of blade traverse devices U1, U2, U3,... Are usually arranged in a row in a horizontal direction. FIG. 1 shows one blade traverse device U1.

1 is a guide surface 1 for forming a traverse trajectory.
The thread guide 2 having a a is located on the upper side in the yarn traveling direction, and is a rotating blade that rotates counterclockwise around the traverse center O1 when viewed from above. The center O2 eccentric to the right from the traverse center O1
4 is an auxiliary guide for turning point A, 5 is an auxiliary guide for turning point B, 41
Is a leaf spring as a resistance imparting member provided on the lower surface of the thread guide 1 near the turning point B, and 51 is a fixed cover member provided around the rotating body 25 to which the upper rotating blade 2 is attached. is there.

Further, 11 is a touch roller or friction roller, 12 is a bobbin holder, and 35 is a bobbin holder 1.
A bobbin P mounted on 2 is a package in which a thread is wound around the bobbin 35. Reference numeral 15 denotes a bracket for supporting the auxiliary guide 4 via the block 16, and reference numeral 17 denotes a bracket for supporting the auxiliary guide 5 via the block 16.

The detailed structure of the blade traverse device for transferring the yarn between the vertically arranged rotating blades 2 and 3 will be described with reference to FIG.

In FIG. 4, the upper rotating blade 2 has a slightly smaller diameter than the lower rotating blade 3, and even if the upper and lower rotating blades 2 and 3 are obliquely arranged as shown in FIG. Are substantially along the vertical yarn path Y. The upper rotating blade 2 is symmetric with respect to the center O1 and has two tips 2a and 2b which are 180 ° apart, and the lower rotating blade 3 is symmetric with respect to the center O2 and is 180 ° apart. It has two tips 3a and 3b. Center O of upper rotating blade 2
1 and the center O2 of the lower rotating blade 3 are on the reference line 13 and are displaced by a distance ε. Note that a line perpendicular to the reference line 13 and passing through the center O1 of the upper rotating blade 2 is a traverse center line 14.

As described above, the center O1 and the center O2 are displaced, so that the yarn is transferred from the upper end 2a to the lower end 3a at the turning point B, and the lower end 3a is moved to the turning point A. At the same time, the upper end 2b also reaches the turning point A. Eventually, the two tips 2a, 2b, 3a, 3b apply the yarn to the yarn
The yarn is reciprocated once along the traverse locus determined by the auxiliary guides 4 and 5. The number of the tips of the rotating blades 2 and 3 is not limited to two, and may have three tips equally spaced at 120 °. Further, one rotating blade may have two tips and the other rotating blade may have three tips, and the angular velocities of rotation may be different in inverse ratio.

Auxiliary guides 4 and 5 for assisting the transfer of the yarn via a bracket attached to the yarn guide 1 are provided below the rotary blades 2 and 3, and the yarn guide 1 and the auxiliary guides 4 and 5 are provided. The rotating blades 2 and 3 are sandwiched from above and below. The auxiliary guide 4 has an outward guide surface 4a, and the auxiliary guide 5 has an inward guide surface 5a facing the traverse center O1. The bracket 15 shown in FIG. 1 has a guide surface 15a that deviates from the traverse locus along the yarn guide 1. The guide surface 15a is not shown when the bobbin is changed by the turret rotation in the spinning winder. This is a surface that holds the yarn detached from the rotary blades 2 and 3 by the action of the yarn removal guide and the yarn pulling guide.

A driving mechanism for rotating the rotating blades 2 and 3 in opposite directions will be described with reference to FIGS. FIG.
, The center shaft 2
3 is rotatably supported. A hollow rotating body 25 is rotatably supported on the substrate 21 via a bearing 24. The lower rotating blade 3 is attached to the lower end of the central shaft 23 via a bolt, and the upper rotating blade 2 is attached to the lower end of the rotating body 25 via a bolt. Further, the drive shaft 27 is connected to the substrate 21 via a bearing 26.
Are rotatably supported. The drive shaft 27 is driven to rotate by a pulley 28. A timing pulley 29 is provided on the pulley 28 side of the drive shaft 27, and a gear 30 is mounted on the opposite side of the pulley 28. Then, a timing pulley 32 meshing with the timing belt 31 hung on the timing pulley 29 is attached to the center shaft 23,
The center shaft 23, that is, the lower rotating blade 3 rotates in the same direction as the drive shaft 27. A gear 33 that meshes with the gear 30 is attached to the hollow rotating body 25, and the rotating body 25, that is, the upper rotating blade 2 rotates in the direction opposite to the drive shaft 27.

In FIG. 6, the meshing ratio between the gears 30 and 33, the timing pulley 29 and the timing pulley 32
, The upper and lower rotating blades 2 and 3 rotate in the opposite directions at the same angular velocity. Reference numeral 34 denotes an idle pulley for applying tension to the timing belt 31.

Next, the state of the yarn at the turning points A and B will be described. As shown in the state diagram of the turning point A in FIG. 2, the thread guide 1 is located above the upper and lower rotating blades 2 and 3, and the thread guide 1 is located below the upper and lower rotating blades 2 and 3 from the side of the touch roller 11. An auxiliary guide 4 projecting in the direction is located. That is, the auxiliary guide 4 is disposed only on the traverse center side with respect to the traverse locus. The whole is arranged so as to diagonally cross the upper and lower yarn paths of the yarn Y along the touch roller 11. At this turning point A, the yarn is transferred from the lower rotating blade 3 to the upper rotating blade 2. At a point C, the rotating blades 2 traverse the yarn in the rightward direction in FIG. The yarn guide 1 is responsible for locking the yarn to the upper rotating blade 2, and the yarn guide 1 not only determines the traverse trajectory but also assists in the transfer of the yarn. Since the auxiliary guide 4 for assisting the transfer of the yarn together with the yarn guide 1 is only for removing the yarn from the lower rotating blade 3, the degree of bending of the yarn in the auxiliary guide 4 is minimized so as not to hinder the transfer of the yarn. It is kept to the limit.

As shown in the state diagram of the turning point B in FIG. 3, the upper and lower rotating blades 2,
The structure in which the thread guide 1 is disposed on the top 3 is the same as that in FIG. However, the auxiliary guide 5 below the rotary blades 2 and 3 is positioned so as to protrude inward from the side opposite to the touch roller 11. That is, the auxiliary guide 5 is arranged only on the opposite side of the traverse center side with respect to the traverse locus. At this turning point B, the yarn is transferred from the upper rotating blade 2 to the lower rotating blade 3. At point D, a state is shown in which the rotating blades 3 traverse the yarn leftward in FIG. 1 along the yarn guide 1. The yarn guide 1 is responsible for removing the yarn from the upper rotating blades 2. The yarn guide 1 not only determines the traverse trajectory but also assists in the transfer of the yarn. Since the auxiliary guide 5 locks the yarn on the lower rotating blade 3, the degree of bending of the yarn in the auxiliary guide 5 is larger than that of the auxiliary guide 4.

As shown in FIG. 1, with the above-described structure and operation, the blade traverse device moves the two rotating blades 2 and 3 in the opposite directions along the yarn guide 1 for forming the trajectory of the yarn. At the turning points A and B, the two rotating blades 2 and 3
Delivery of thread between

This blade traverse device is incorporated in, for example, a revolving type spinning winder that winds a yarn from a spinning machine. When a yarn break occurs in the spinning winder or the like and the sensor detects the occurrence of the yarn breakage, the yarns directed to all the traverse devices U1, U2, U3... The yarn from the machine is sucked. That is, when a yarn break occurs, 4-5
About m threads are free. Then, the yarn reaching the blade traverse device is slackened, the yarn is brought in past the turning point B by the upper rotating blade 2, and the free yarn is wound around the outer periphery of the rotating body 25 to which the upper rotating blade 2 is attached. Try to stick. This state is the yarn Y2 in FIG. Since the upper rotating blade 2 and the rotating body 25 rotate integrally, the yarn once started to wind is wound to the end of the length of 4 to 5 m.

A resistance applying member 41 is provided to prevent the yarn from being wound around the rotating body when the yarn breaks, and a cover member 51 is further provided to reliably prevent the winding.

The details of the resistance applying member 41 will be described with reference to FIG. The resistance applying member 41 is formed by forming a wedge 43 between a leaf spring 42 which is a member having elasticity and a lower surface of the thread guide 1. The leaf spring 42 has a short hypotenuse 42 at one end.
a, a long oblique side 42b, and a tip 42c where the two oblique sides intersect. The other end of the leaf spring 42 away from the turning point B is fixed so as to be pressed against the lower surface of the thread guide 1 by a bolt 44.

The oblique side 42b is arranged such that the end 42d of the long oblique side 42b opposite to the tip 42c abuts against the lower surface of the thread guide 1.
Is trough-folded at line 45. The vicinity of the end 42d is folded back so as to make surface contact. Therefore, the leading end 42c rises from the lower surface of the yarn guide 1, the gap between the inclined surface 42b and the lower surface of the yarn guide 1 gradually decreases, and the wedge 43 is formed at the end 42d, where the gap becomes zero due to surface contact. Is done.

As shown in FIG. 1, the wedge 43 formed by the long hypotenuse is such that the yarn Y2 wound by the upper rotating blade 2 intersects the trajectory 46 of the yarn guide 1 toward the rotating body 25 along the lower surface of the yarn guide 1. It is arranged in the direction. Also, the tip 42
c is positioned so that the yarn moving along the trajectory 46 can be sandwiched.

The resistance applying member 41 is not limited to the wedge formed between the leaf spring and the lower surface of the thread guide, but may be a single wedge member arranged on the path of the thread when the thread breaks. In short, any resistance providing member having a function of gradually applying resistance to the yarn may be used. In this sense, the leaf spring 42 may be a rigid body, but in consideration of the ease of removing the bite thread in the direction of the thread biting action of the wedge 43, an elastic member such as a leaf spring is considered. It is preferred that If it is a leaf spring, it can be arranged in a narrow space between the thread guide and the upper rotating blade. The above-described yarn hooking portion 2c is configured to divide the yarn
It also acts to lead to 1.

As shown in FIG. 1, a thread hook 2c is provided at the tip end of the upper rotating blade 2 on which the thread is wound when the thread breaks. The yarn caught in the upper rotating blade 2
Although it slides from the tip to the root side, it enters the thread hooking portion 2c and stops sliding. Then, as shown in FIG. 1, reproducibility occurs in a trajectory 46 where one end is near the turning point B and the other end is directed to the rotating body 25 via the upper rotating blade 2.

In order to completely prevent the winding of the yarn around the rotating body 25 at the time of yarn breakage, a cover member 51 is further provided in addition to the resistance applying member 41. Details of the cover member 51 will be described with reference to FIG.

The upper rotary blade 2 is attached to the lower end of the hollow rotary body 25 with bolts. Therefore, a gap is inevitably generated between the lower end of the housing 21a and the rotary blade 2. The yarn wound by the rotating blades 2 enters the rotating body 25 from this gap and is wound.

Therefore, a cover member 51 is provided integrally or separately below the housing 21a, and the yarn drawn in by the upper rotating blade 2 is brought into contact with the cover member 51. Since the housing 21a is formed on the substrate 21 which is a fixed member that covers the driving mechanism, the cover member 51 is also in a fixed stationary state. When the thread wound from the guide surface 1a toward the rotating body 25 is brought into contact with the fixed cover member 51 by the rotating blade 2, the cover member 51 generates a negative speed difference with respect to the traveling speed of the thread wound by the rotating blade 2. Because of this, the cover member 51 becomes resistant to the yarn, and the yarn does not slip on the cover member 51 at all, or does not slip on the cover member 51 in at most several turns, and the rotating blade 2 that rotates at high speed The thread is removed from the thread or the thread is cut.

The cover member 51 performing such a function
Has a ring shape located around the rotating body 25. The yarn that enters the yarn hooking portion 2 c from the tip of the upper rotating blade 2 and is wound thereon travels toward the cover member 51 along a line parallel to the upper surface of the tip of the rotating blade 2.

Therefore, the root portion 1c of the rotary blade 2 close to the rotating body 25 has a bent portion 2d such that the upper surface on the tip side of the rotary blade 2 is higher than the upper surface on the root side. As a result, the upper surface on the tip end side of the rotary blade 2 is located above the lower end of the cover member 51. Instead of the bent portion 2d, the thickness of the rotary blade 2 may be changed to provide a step on the upper surface of the rotary blade 2. The step on the upper surface is preferably provided at the root.

At the lower end of the cover member 51 around which the yarn is wound, a flange-shaped hook portion 52 is provided. The thread coming into contact with the periphery of the ring-shaped cover member 51 is prevented from dropping downward by the hook portion 52. The hook portion 52 is not limited to a flange shape, but may be a groove.

Next, the operation of the above-described blade traverse device, particularly at the time of yarn breakage, will be described with reference to FIG. FIG. 7 is a view of the rotary blade 2 as viewed from the XX direction in FIG. Therefore, the lower surface of the yarn guide 1 is visible.

When a yarn break occurs,
A free yarn of about 4 to 5 m is generated. Since the free yarn is loosened, the transfer of the yarn at the point B from the upper rotating blade to the lower rotating blade fails. Since the yarn Y2 is continuously supplied from the back of the paper, the upper rotating blade 2 is wound around the outer peripheral surface of the rotating body 25 via the guide surface 1a of the yarn guide 1 as shown in the figure. First, the yarn Y2 slides from the tips 2a and 2b of the upper rotating blade 2 to the root side,
The thread enters the thread hook 2c. The yarn Y2 that has entered the yarn hooking section 2c is
It is guided by the threading portion 2c, and follows the locus 46 as shown in the drawing to be involved.

The trajectory 46 extends from the vicinity of the turning point B to the rotating body 25 via the rotary blade 2, and the yarn Y 2 moves along the trajectory 46. In the first stage of the trajectory 46, the thread Y2 is moved from the tip 42c of the leaf spring 42 to the thread guide 1
And the lower surface on the paper surface side of the paper. The wedge 43 enters the wedge 43 from the middle of the trajectory 46, and bites into the wedge 43 as the yarn Y2 moves along the trajectory 46. Then, a gradually increasing resistance is applied to the yarn Y2 to be wound. Due to this resistance, the yarn Y2 does not follow the rotating blade 2 and the rotating blade 2 is removed. When the resistance exceeds the tensile strength of the yarn Y2,
For example, a thread break may occur at the point E, but in any case, the thread Y2 is detached from the rotary blade 2 and the winding around the rotary body 25 is prevented. The thread end biting into the wedge 43 between the leaf spring 42 and the thread guide 1 can be easily removed by pressing down the leaf spring with a metal fitting or the like. For this reason, an insertion hole 1b for a jig for pushing down the leaf spring 42 is formed in the thread guide 1.

If the thread Y2 is not interposed between the leaf springs 42 functioning as the resistance applying member 41, the thread Y2 comes into contact with a fixed cover member 51 located on the outer periphery of the rotating body 25. This contact is reliably performed by being guided by the thread hooking portion 2c of the rotary blade 2. The yarn that comes into contact with the cover member 51 slips at first, but as the contact length (contact angle) increases, the resistance increases and slippage stops. Then, a braking force acts on the yarn carried by the yarn hooking portion 2c of the rotating blade 2 rotating at a high speed, and while the yarn is not wound around the cover member 51 once,
The yarn comes off from the yarn hooking portion 2c during winding at most several times.

First, the yarn is applied to the rotating blade 2 by the resistance applying member 41.
Therefore, the probability of the thread coming into contact with the cover member 51 is small. In contact with the cover member 51, the cover member 5
Even if there is a turn to 1, because it is several turns,
The thread is easily detached from the cover member 51.

[0043]

As described above, according to the first aspect of the invention, when the yarn breaks, the yarn moving along the trajectory from the guide surface of the yarn guide toward the rotating body is given resistance by the resistance applying member, and Is removed from the rotating blades,
Regardless of the timing at which the yarn breaks, the yarn does not reach the rotating body to which the rotating blade is attached, and the yarn can be reliably prevented from winding around the rotating body.

According to the second aspect of the present invention, the yarn at the time of yarn breakage is guided to the yarn hooking portion of the rotary blade.
The locus of the yarn moving toward the rotating body is determined, and the yarn is reliably guided to the resistance applying member.

According to the third aspect of the present invention, since a wedge is formed by attaching an elastic member to the yarn guide, a resistance applying member that operates reliably is provided in a narrow gap between the yarn guide and the upper rotating blade. can do.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a blade traverse device of the present invention.

FIG. 2 is a side view showing a thread transfer state at the left turning point of the traverse locus.

FIG. 3 is a side view showing a thread transfer state at a right turn point of the traverse locus.

FIG. 4 is a diagram viewed from above in FIG. 1, and is a diagram mainly illustrating a yarn guide and rotating blades.

FIG. 5 is a longitudinal sectional view of a blade traverse device showing an example of arrangement of another yarn cutting device.

FIG. 6 is a diagram viewed from a direction A in FIG. 5, and is a diagram mainly illustrating a driving mechanism.

FIG. 7 is a view as seen from the XX direction in FIG. 5, showing the operation of the blade traverse device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Yarn guide 1a Arc part (guide surface) 2 Upper rotating blade 3 Lower rotating blade 41 Resistance applying member 42 Leaf spring 43 Wedge 46 Trace 51 Cover member 52 Catch portion ε Cover member from upper surface of tip of upper rotating blade A A left turning point B Right turning point

Claims (3)

[Claims] 1. A yarn guide having a guide surface for forming a traverse trajectory; and a yarn guide disposed above and below in a yarn traveling direction, rotating in opposite directions along the yarn guide, and turning at a turning point of the traverse trajectory. A blade traversing device comprising: two rotating blades that transfer yarns; and a resistance applying member that applies resistance to the yarn drawn from the guide surface toward the rotation center of the rotating blades by the rotating blades. . 2. The blade traverse device according to claim 1, wherein a thread hooking portion is provided on a tip end side of the rotary blade. 3. The blade traverse according to claim 1, wherein the resistance applying member forms a wedge between the elastic member and the yarn guide, and causes the yarn to bite into the wedge to increase the resistance. apparatus.