JPH0535862U - Spinning machine roving guide - Google Patents

Abstract

(57) [Summary] [Purpose] After being rotated from the prescribed position during normal spinning, it can be reliably returned to the prescribed position when the action of external force is released.
Provided is a roving guide for a spinning machine capable of preventing the production of defective yarns due to piled cotton wool. A support arm 13 is rotatably supported by a support shaft 10 fixed to a support rail 3, and spring holders 14 and 15 are fixed to at least one of the upper and lower sides of the support arm 13 by screws. A pair of torsion coil springs 19 and 2 are provided in the accommodating portions 17a and 17b formed in the support arm 13.
0 is stored. The torsion coil springs 19 and 20 are set so as to urge the support arms 13 in opposite directions, and the support arms 13 are set parallel to the longitudinal direction of the support rail 3 in a state where the urging forces of the torsion coil springs 19 and 20 are balanced. Become. A roving guide body 22 is fixed to the lower end of a mounting rod 21 fixed to the tip of the support arm 13 with a screw.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention, when the roving bobbin suspended in two rows inside and outside along the creel of the spinning frame comes close to the sky, moves the roving bobbin along the spinning frame to advance the preliminary roving rail. It is used in a spinning machine that changes the roving by a roving changer of the type that replaces the full roving (prepared roving) that has been prepared in 1. Roving guide.

[0002]

[Prior Art]

 In a spinning machine, particularly a ring spinning machine, a roving thread is drawn from a roving thread winding line that is hung on two inner and outer rows of roving thread windings that form a creel, and roving guides are provided at the intermediate positions of the inner and outer roving thread windings. After that, it is supplied to the lower draft part. When the supply of roving to the draft part progresses and the roving winding becomes empty or approaches empty, a roving replacement operation for replacing the roving with a new roving is required. Then, automation in spinning factories has progressed, and automation of roving change work and roving splicing work after roving change has been proposed (for example, JP-A-61-119728 and JP-A-2-127368). ).

In the roving thread changing method disclosed in the above-mentioned publication, two roving thread windings suspended in two rows inside and outside are replaced with preliminary roving thread windings, and two empty roving thread windings suspended inside are taken out. When suspending the preliminary roving bobbin on the inner roving bobbin rail, the empty roving bobbin and the preliminary roving bobbin contact the roving guide. Therefore, it is necessary to configure the roving guide so that it can be moved to a position that does not hinder the movement of the empty roving bobbin and the preliminary roving bobbin and a predetermined position during spinning.

A roving guide of this type shown in FIG. 7 has been disclosed in Japanese Utility Model Laid-Open No. 1-157184. The roving guide 50 is attached to a support shaft 51 extending along a longitudinal direction of a spinning machine base (not shown) and a support shaft 52 projecting at a predetermined interval twice the spindle pitch. A support bracket 53 is rotatably supported at the base end of the support shaft 52, and a guide body 55 is fixed to the lower end of a mounting rod 54 fixed to the tip of the support bracket 53 in a vertically extending state. A tension spring 56 is mounted between the protruding end of the mounting rod 54 protruding above the support bracket 53 and the upper end of the adjacent support shaft 52, and the support bracket 53 is always parallel to the longitudinal direction of the support rail 51. Is held in the position. Then, when the empty roving bobbin or the preliminary roving bobbin moves in contact with the roving guide when changing the roving, the support bracket 53 is rotated against the biasing force of the tension spring 56, and the empty roving bobbin or the preliminary roving When the engagement with the roving spool is released, the guide body 55 is arranged at a predetermined position during normal spinning by the urging force of the tension spring 56.

[0005]

[Problems to be solved by the device]

 In the apparatus disclosed in Japanese Utility Model Laid-Open No. 1-157184, it is the tension of the tension spring 56 that acts to return the support bracket 53 rotated from a predetermined position (reference position) during normal spinning to the reference position. It is a moment due to force. However, since the tension spring 56 is stretched so as to be aligned with the support bracket 53 when the support bracket 53 is placed at the reference position, the value of the moment becomes small depending on the position of the support bracket 53.

That is, as shown in FIG. 8, an arc C having a radius r with the shaft 52 as the center and the length from the shaft 52 to the point P of action of the tension spring 56 on the support bracket 53 is drawn. When the tangent line of C at the point of action P is L, the urging force of the tension spring 56 is f, and the angle between the tangent line L and the acting direction of the urging force f is θ, the moment M is represented by the following equation.

M = rf cos θ That is, the value of the moment M is not simply proportional to the tensile force of the tension spring 56, but is proportional to the product of the tensile force of the tension spring 56 and cos θ. The tensile force f increases as the amount of rotation of the support bracket 53 from the reference position increases. Further, the angle θ is 90 ° when the support bracket 53 is arranged at the reference position, and becomes smaller due to the rotation of the support bracket 53 from the reference position, and the tangent line L and the acting direction of the tensile force f overlap. The angle θ sometimes becomes 0 °. The value of cos θ becomes maximum at 1 when the angle θ is 0 °, and becomes 0 when the angle θ is 90 °. Therefore, the value of the moment M represented by M = rf cos θ becomes maximum near the angle θ of 0 °, and both the tensile force f and cos θ become smaller as the support bracket 53 approaches the reference position. The value of the moment M obtained by multiplying the product of the two by a constant value r decreases rapidly as the support bracket 53 approaches the reference position, and becomes 0 when the angle θ at which the support bracket 53 is placed at the reference position is 90 °. Become.

Therefore, since the moment M suddenly decreases near the reference position, there is a large variation in the return position, which causes a problem in the roving thread hooking work. When the tensile force of the tension spring 56 is increased in order to increase the return force to the reference position, the roving guide is vigorously reversed when returning after rotating. At that time, vibration may be transmitted to the adjacent roving guide 50 via the support rail 51, causing slack of the roving yarn, and the roving yarn being caught by the roller of the draft part (not shown). In this case, there is a problem that defective yarn production or roving breakage occurs.

Further, in the conventional apparatus, since the tension spring 56 is exposed, the cotton wool floating in the spinning factory is wound around the tension spring 56 and grows. Especially, a fiber having a small diameter, such as the tension spring 56, is likely to be wound with fibers of the cotton wool, and the cotton wool grows largely with the cotton wool as a core. Then, the lumps of grown fibers eventually fall and adhere to the roving yarn or yarn being spun, and defective yarn is produced.

The present invention has been made in view of the above problems, and a first purpose thereof is to apply an external force to a roving guide arranged at a predetermined position (reference position) at the time of normal spinning. After turning from the position, when the action of external force is released, it can reliably return to the reference position without variation, and prevents the production of bad yarn by eliminating the cotton wool accumulated on the biasing means. The purpose is to provide a roving guide for a spinning machine.

A second purpose is that the force of the biasing means for returning the roving guide to the reference position does not become excessively large, the vibration at the time of reversing and returning of the roving guide is small, and the adjacent roving yarn is It is to provide a roving guide for a spinning machine that does not cause slack.

[0012]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the present invention, it is arranged rotatably around a support shaft between rows of roving spools suspended in two rows inside and outside along a creel, and is always provided by a biasing means. A roving guide including a support arm that is held at a predetermined position during normal spinning and a guide body that is provided below the support arm and is rotatable integrally with the support arm. Has a locking member fixed to at least one of the upper and lower sides of the support arm, and a pair of torsion coil springs for urging the support arm to rotate in opposite directions are provided in the housing provided between the support arm and the locking member. , The locking arm of each torsion coil spring is arranged in a state of being locked by the supporting arm and the locking member so that the supporting arm is arranged at a predetermined position during normal spinning with the urging force balanced. ..

Further, in the invention as claimed in claim 2, at least one of the support arm and the locking member is formed with an elongated hole with which the engaging portions of the both torsion coil springs are engaged, and each elongated hole has a supporting arm. One end is locked in the locking part in a state where it is placed at a predetermined position during normal spinning, and it extends in the direction opposite to the direction of the biasing force of the torsion coil spring that engages with the elongated hole. The two torsion coil springs are arranged in the accommodating portion in a state in which the biasing force is set by a rotation amount shorter than the length of each long hole.

[0014]

[Action]

 In the roving guide of the present invention, the support arm that rotates integrally with the guide body is always held at a predetermined position (reference position) during normal spinning by the biasing means. The pair of torsion coil bars, which constitute the urging means provided on at least one of the upper and lower sides of the support arm, urge the support arms to rotate in opposite directions while the support arms are arranged at the reference position. The biasing forces are in balance. That is, even when the supporting arm is arranged at the reference position, the moment due to the biasing force of each torsion coil spring acts on the supporting arm. Therefore, even when the support arm is slightly displaced from the reference position, a sufficient moment acts on the support arm to return the support arm to the reference position. Further, since the support arm is urged by the pair of torsion coil springs that urge the support arm to rotate in opposite directions to each other, frictional force due to one-sided contact of the support arm with the support shaft does not occur. Therefore, after the support arm is rotated from the reference position by the action of the external force, when the action of the external force disappears and the support arm returns to the reference position, the variation in the return position becomes small.

Further, since the torsion coil spring as the urging means is arranged in the accommodating portion, the cotton wool does not adhere and accumulate on the torsion coil spring, and the production of defective yarn due to the adhered accumulation cotton is avoided. To be done.

According to the second aspect of the invention, when an external force acts to rotate the support arm, one of the torsion coil springs rotates with the locking portion locked to one end of the elongated hole. As a result, the urging force that urges the supporting arm to rotate toward the reference position increases. On the other hand, the torsion coil panel becomes free because the restriction of the locking part due to the long hole is released during the rotation of the support arm. Therefore, when the external force does not act on the support arm, the support arm is rotated toward the reference position by the biasing force of the one torsion coil spring, and the engaging portion of the other torsion coil spring is formed into the elongated hole again during the rotation. Be locked. Then, the support arm stops at the reference position where the biasing forces of the two torsion coil springs are balanced.

[0017]

【Example】

 (Embodiment 1) Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.

As shown in FIG. 5, the creel 1 of the spinning machine has two rows of roving winding rails 2a and 2b on the left and right sides (only one side is shown) of the machine frame and in the machine longitudinal direction (direction perpendicular to the plane of the drawing). Support rails 3 are extended in parallel, and between the roving winding rails 2a and 2b, a support rail 3 is extended in parallel with the machine base longitudinal direction via a support rail bracket 3a. The roving winding rails 2a and 2b are provided with bobbin hangers 4 at predetermined intervals which are twice the spindle pitch. A roving guide 6 for guiding the roving R drawn from the roving bobbin B suspended from the bobbin hanger 4 to the trumpet 5a of the draft part 5 is attached to the support rail 3 at a predetermined interval which is twice the spindle pitch. A support bracket 7 extends outward from the creel 1, and a spare rail 8 is provided at the tip thereof in parallel with the roving winding rails 2a and 2b. A carrier 9 having a bobbin hanger 9a is movably supported on the spare rail 8.

As shown in FIG. 1, a supporting shaft 10 is fixed to the supporting rail 3 in a state of extending downward at predetermined intervals. On the support rail 3, a special nut 11 having a large number of screw holes 11a formed at the mounting pitch of the roving guide 6 is arranged on the support rail 3 so that both sides are engaged with each other. The support shaft 10 is screwed into the screw hole 11a in a state where the male screw portion 10a formed in the upper portion penetrates the groove formed in the support rail 3 and is screwed into the male screw portion 10a below the support rail 3. The nut 12 is tightened and fixed to the support rail 3. Since the screw holes 11a are formed at the mounting pitch of the roving guide 6, the support shaft 10 is easily fixed at a predetermined position while being accurately positioned.

A support arm 13 that constitutes the roving guide 6 is rotatably supported on each of the support shafts 10 at the base end thereof, and the support shafts 10 serve as locking members on both upper and lower sides of the support arm 13. The spring holders 14 and 15 are fixed by screws 16. As shown in FIG. 2 (b), accommodating portions 17 a and 17 b are formed on the upper and lower sides of the supporting arm 13 at positions corresponding to the spring holders 14 and 15, and accommodating portions are sandwiched between the accommodating portions 17 a and 17 b. Arc-shaped elongated holes 18a and 18b communicating with the portions 17a and 17b are formed. A pair of torsion coil bars 19 and 20 as biasing means are inserted into the accommodating portions 17a and 17b, and one engaging portion 19a and 20a is fitted into the engaging holes 14a and 15a of the spring holders 14 and 15, and the other engaging portion is engaged. Stops 19b and 20b are accommodated in the elongated holes 18a and 18b, respectively.

Both torsion coil springs 19 and 20 are formed so that the torsion directions are the same, and the spring holders 14 and 15 are such that the upper and lower torsion coil springs 19 and 20 act on the support arm 13 by a predetermined acting force (urging force) in mutually opposite directions. ) Is fixed to the spindle by a screw 16. Then, the support shaft 13 is mounted on the support rail 3 with the special nut 11 and the nut 12 so that the support arm 13 is parallel to the longitudinal direction of the support rail 3 in a state where the urging forces of the both torsion coil springs 19 and 20 are balanced. It is tightened and fixed by.

A mounting rod 21 is fixed to the tip of the support arm 13 so as to extend downward, and a roving guide main body 22 is fixed to the lower end of the mounting rod 21 with a screw 23. As shown in FIGS. 3 and 4, the guide body 23 has guide recesses 24a and 24b formed on both left and right sides of the mounting rod 21 as a center. Further, when the support arm 13 extends parallel to the support rail 3, that is, when the support arm 13 is arranged at a predetermined position (reference position) during normal spinning, the roving introduction port 25a, 25a, Guide portions 26a and 26b for guiding the roving R to the 25b are formed substantially parallel to each other.

Next, the operation of the roving guide 6 configured as described above will be described. In the spinning machine using the roving guide 6, the roving winding rails 2a, 2b are spun on the roving winding rails 2a, 2b, with every other set of medium thread roving thread M and full roving thread winding F hung. When the feeding is started and the roving bobbin M of the medium ball approaches the empty roving bobbin E, the roving change is performed. Since the roving guide 6 is disposed in the middle of the roving bobbins wound in two rows, the inner empty roving bobbin E is shown in the middle of the process of taking out the empty roving bobbin E shown in FIGS. 6 (a) and 6 (b). However, during the process of suspending the full roving bobbin (preliminary roving bobbin) F shown in FIGS. 6 (c) and 6 (d) on the inner roving bobbin rail 2b, the full roving bobbin F interferes with the roving guide 6 respectively. The roving guide 6 is rotated around the support shaft 10 from the reference position.

The case where the roving guide 6, that is, the support arm 13 is rotated inward from the reference position, that is, the case where the roving guide 6 is rotated by engaging with the full roving spool F will be described first. When no external force acts on the roving guide 6, as shown in FIG. 3, the locking portions 19b and 20b of the two torsion coil springs 19 and 20 are locked to the ends of the long holes 18a and 18b to restrict the movement thereof. Is in a state. At this time, the locking portion 19b of the upper torsion coil spring 19 moves the support arm 13 counterclockwise in FIG. 3, and the locking portion 20b of the lower torsion coil spring 20 moves the support arm 13 clockwise in FIG. The urging forces of the both are balanced in a state where the urging forces act so as to urge the rotation. That is, even when the support arm 13 is arranged at the reference position, moments are applied to the support arm 13 by the urging forces of the torsion coil springs 19 and 20, respectively. Therefore, even when the support arm 13 is slightly displaced from the reference position, a sufficient moment acts on the support arm 13 to return the support arm 13 to the reference position. Further, the support arm 13 is urged by a pair of torsion coil springs 19 and 20 that urge the support arm 13 to rotate in opposite directions, so that the friction caused by the one-sided contact of the support arm 13 with the spindle 10. No force is generated. Therefore, when the support arm 13 returns to the reference position due to the absence of the external force after the support arm 13 is rotated from the reference position by the action of the external force, the variation of the return position (deviation from the reference position) is small. Become.

The biasing force of the torsion coil spring 19 is increased when the locking portion 19b is rotated clockwise from the state of FIG. 3, and the biasing force of the torsion coil spring 20 is counterclockwise from the state of FIG. 3 to the locking portion 20b. Strengthens when is rotated. Therefore, when the external force for rotating the support arm 13 in the clockwise direction from the state of FIG. 3 acts to rotate the support arm 13 in the clockwise direction, the support hole 13 is locked with the elongated hole 18a as the support arm 13 rotates. The locking portion 19b at the position is rotated in the clock direction, and the urging force of the torsion coil panel 19 for urging the support arm 13 in the counterclockwise direction is increased.

On the other hand, the locking portion 20b that is locked with the elongated hole 18b is initially rotated clockwise by the biasing force of the torsion coil spring 20 while being locked with the elongated hole 18b, and is twisted during the rotation. The coil spring 20 returns to the free state. After that, the locking portion 20b stops at the position shown in FIG. 4, and the supporting arm 13 rotates without being affected by the torsion coil spring 20. That is, in the state shown by the solid line in FIG. 4, only the biasing force of the torsion coil spring 19 acts on the support arm 13.

When the external force acting on the roving guide 6 disappears, the support arm 13 is rotated to the reference position side by the urging force of the torsion coil spring 19, that is, counterclockwise from the state shown by the solid line in FIG. .. Then, the engaging portion 20b is again engaged with the elongated hole 18b during the rotation, and the biasing force of the torsion coil spring 20 acts on the support arm 13, so that the biasing forces of the torsion coil springs 19 and 20 are balanced. The supporting arm 13 stops at the reference position.

When the support arm 13 is rotated counterclockwise from the state of FIG. 3, conversely to the above, the biasing force of the lower torsion coil spring 20 increases as the support arm 13 rotates, The upper torsion coil spring 19 returns to the free state during the rotation. Then, when the external force acting on the roving guide 6 disappears, the support arm 13 is rotated to the reference position by the biasing force of the torsion coil spring 20.

As described above, when the support arm 13 is rotated from the reference position by a predetermined amount or more due to the action of the external force, only one of the torsion coil springs 19 and 20 acts on the support arm 13. Therefore, the restoring force at the time when the external force acting on the roving guide 6 disappears (at the time when the engagement with the roving bobbin is released) does not become larger than necessary, and the vibration of the support arm 13 near the reference position. Becomes smaller, and the slack of the adjacent roving yarn does not occur.

Further, since the torsion coil springs 19 and 20 are disposed inside the accommodating portions 17a and 17b and are not exposed to the outside, the cotton wool is not attached and deposited on the torsion coil springs 17a and 17b, and the attached and accumulated cotton wool is attached. The production of defective yarns due to is avoided.

The present invention is not limited to the above embodiment, and for example, the shape of the guide main body is changed, and two independent guide recesses 24a, 24b for guiding the two roving threads R, and Instead of the one having the roving yarn introducing ports 25a and 25b, it may be applied to a roving guide having one roving yarn introducing port such as the roving guide disclosed in Japanese Utility Model Laid-Open No. 62-15581. Further, the accommodating portions 17a and 17b are not provided on the spring holders 14 and 15 side, and the elongated portions 18a and 18b are not formed in the support arm 13 so that the locking portions 19b and 20b of the torsion coil springs 19 and 20 are always provided to the support arm 13 respectively. It may be locked to the support arm 13 so as to move integrally therewith. Conversely, a long hole may be formed on the side of the locking member.

[0032]

[Effect of the device]

 As described above in detail, according to the present invention, a pair of torsion coil springs for biasing the support arms in opposite directions even when the support arms are arranged at a predetermined position (reference position) during normal spinning are provided. Since the moment due to the urging force acts, after the external force acts on the roving guide located at the reference position and the roving guide is rotated from the reference position, it returns to the reference position when the action of the external force is released. The deviation from the position becomes small, and the roving thread hooking problem disappears when the roving thread is hooked on the roving guide after the roving thread is spliced by the automatic roving thread changer. Further, since the torsion coil spring as the urging means is built in the accommodating portion, the fly fluff accumulated on the urging means is eliminated, so that the production of defective yarns due to the accumulated fly fluff can be prevented. In addition to the above effects, the device described in 2 does not increase the force of the urging means for returning the roving guide to the standard position more than necessary, and reduces the vibration when the roving guide reverses and returns. Therefore, slack does not occur in the adjacent roving yarn, and production of defective yarn and roving breakage can be prevented.

[Brief description of drawings]

FIG. 1 is a front view showing a mounting state of a roving guide.

2A is a side view showing a mounting state of a roving guide, and FIG. 2B is a sectional view taken along line BB in FIG.

FIG. 3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a partially cutaway plan view showing the operation.

FIG. 5 is a schematic side view showing a relationship between a roving guide and a spinning machine.

6 (a) and 6 (b) are schematic plan views showing a part of a process of taking out an empty roving bobbin, and FIGS. 6 (c) and 6 (d) show a part of a process of suspending a full roving bobbin. It is a schematic plan view.

FIG. 7 is a front view showing a conventional roving guide.

FIG. 8 is a schematic diagram illustrating the operation of a conventional roving guide.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Creel, 2a, 2b ... Coarse thread winding rail, 3 ... Support rail, 6 ... Roving guide, 10 ... Spindle, 13 ... Support arm, 14, 15 ... Spring holder as a locking member, 17a, 17b ... Storage part , 18a, 18b ... elongated holes,
19, 20 ... Torsion coil spring, 21 ... Mounting rod, 2
2 ... Guide body.

Claims (2)

[Scope of utility model registration request] 1. A rotatably disposed centering around a support shaft between rows of roving spools that are suspended in two rows inside and outside along a creel, and a biasing means always provides a predetermined position during normal spinning. A roving guide comprising: a support arm held by the support arm; and a guide body provided below the support arm so as to be rotatable integrally with the support arm, wherein the support shaft has at least one side above and below the support arm. The locking member is fixed to the housing, and a pair of torsion coil springs for biasing the support arms to rotate in opposite directions are provided in the accommodating portion provided between the support arm and the locking member, and the biasing forces are balanced with each other. A roving guide for a spinning machine, in which the supporting portions of the torsion coil springs are arranged in a state of being locked by the supporting arm and the locking member so that the supporting arm is arranged at a predetermined position during normal spinning. 2. A long hole is formed in at least one of the support arm and the locking member, with which the locking portions of the torsion coil springs are engaged, and each long hole is located at a predetermined position when the support arm is normally spun. One end of which is arranged to be locked in the locking portion in a state of being arranged, and is formed to extend in a direction opposite to the direction of the biasing force of the torsion coil spring that engages with the elongated hole,
2. The roving guide for a spinning machine according to claim 1, wherein the both torsion coil springs are arranged in the accommodating portion in a state in which the biasing force is set by a rotation amount shorter than the length of each elongated hole.