JP2008297676A - Fiber strand-bundling apparatus in spinning machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To carry out yarn spinning in stable yarn quality by suppressing occurrence of clogging of a fiber in a part transferring from a taper part of a guide member to a straight part. <P>SOLUTION: A fiber strand-bundling apparatus 30 is equipped with an exciting means of vibrating a guide member 31 having a guide face for guiding fiber strand F so as to narrow the width of the fiber strand F so as to generate acoustic pressure for preventing contact of the fiber strand onto the guide face. The guide member 31 is equipped with a pair of plate-like guide parts 35 and the pair of plate-like guide parts 35 is equipped with a straight part 35b in which intervals between the opposite faces constituting the guide face are definite and a taper part 35c formed so that upstream side in the advancing direction of the fiber strand F becomes wider. The shape of the guide part 35 is set so that positions of outlet 35d of the straight part 35b and a continuous part 35e of the taper part 35c and the straight part 35b become belly of vibration. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fiber bundle concentrating device in a spinning machine, and more particularly, a fiber bundle of a spinning machine that is disposed downstream of a draft device (draft part) of a ring spinning machine and is suitable for converging a fiber bundle drafted by the draft device. The present invention relates to a focusing device.

  In the ring spinning machine, various fiber bundle concentrating devices have been proposed for the purpose of improving the yarn quality such that the drafted fiber bundle is preliminarily converged before twisting and there is little unevenness and less fluff. As a method for converging the fiber bundle, a method using a mechanical guide (collector) and a method of causing a suction airflow to act on the fiber bundle moving on the perforated belt (ventilated apron) are generally used.

However, in these methods, since the fiber bundle is guided in contact with the fiber bundle, it is necessary to take measures to reduce the friction on the surface of the guide member in order not to disturb the fiber arrangement in the fiber bundle. However, the performance deteriorates with time. In order to solve this problem, a fiber bundle guiding device that can guide the fiber bundle without contacting the fiber bundle and prevents the wear state of the guide surface from deteriorating due to wear or adhesion of foreign matter is proposed. (See Patent Document 1). The fiber bundle guide device of Patent Document 1 includes a guide member provided with a guide surface that narrows the width of the fiber bundle along the moving direction of the fiber bundle to be guided, and a fiber bundle on the guide surface when attached to the spinning machine. Excitation means for vibrating the guide member so as to generate a sound pressure that prevents the contact of the guide member. Then, when the guide member is excited at a predetermined resonance frequency (for example, around 34 kHz), the guide member vibrates and guides the fiber bundle in a non-contact state.
JP 2007-9391 A

  A high-quality yarn called compact yarn needs to bundle a fiber bundle to a width of about 0.5 to 1.0 mm at a fiber bundle condensing portion (condensation zone). When trying to converge the fiber bundle in such a narrow range, the guide surface has a tapered portion that widens the upstream side in the traveling direction of the fiber bundle and a straight portion having a constant width continuously at the downstream end of the tapered portion. The fiber bundle is preferably guided from the tapered portion to the straight portion. However, if the guide member is simply vibrated, when the amplitude of vibration of the guide member is too small, fiber clogging occurs at the portion where the fiber bundle moves from the tapered portion to the straight portion. Moreover, when the amplitude at the exit of the straight portion is too small, the yarn quality is adversely affected.

  The present invention has been made in view of the above problems, and its object is to suppress the occurrence of fiber clogging at the portion of the guide member where the taper portion transitions to the straight portion, thereby spinning with stable yarn quality. It is an object of the present invention to provide a fiber bundle guide device in a spinning machine that can perform the ejection.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a guide member provided with a guide surface for guiding the width of the fiber bundle moving from the upstream side to the downstream side is narrowed, and the guide surface includes the guide member. A fiber bundle concentrating device in a spinning machine comprising excitation means for vibrating the guide member so as to generate a sound pressure that prevents the fiber bundles from contacting each other. The guide member includes a pair of plate-like guide portions provided to face each other so as to constitute the guide surface, and the pair of guide portions are formed on the opposing surfaces constituting the guide surface. A straight portion having a constant interval and a tapered portion formed so that the upstream side in the traveling direction of the fiber bundle is widened are provided so that the straight portion is downstream in the traveling direction of the fiber bundle. The shape of the guide portion is such that when the guide member is excited at a predetermined frequency by the excitation means, the position of the outlet of the straight portion and the continuous portion of the tapered portion and the straight portion is shifted from the vibration node. It is set to be the position. Here, the “tapered portion” means a shape in which the interval between the opposing surfaces gradually changes, and the opposing surface is not limited to a flat surface but may be a curved surface.

  In this invention, a guide member having a pair of plate-like guide portions provided facing each other so as to constitute a guide surface that guides the fiber bundle moving from the upstream side to the downstream side is excited. A sound wave is generated from the guide surface by being vibrated by the means. When the guide member is excited, the position of the continuous portion of the taper portion and the straight portion where the fiber is likely to be clogged when the vibration amplitude is insufficient is shifted from the vibration node where the amplitude is minimized. Therefore, the clogging of the fibers in the guide portion is suppressed by sufficient sound pressure acting on the fiber bundle. In addition, it is possible to secure an amplitude for causing sufficient sound pressure to act on the fiber bundle at the outlet of the straight portion. Therefore, it is possible to perform spinning with stable yarn quality by suppressing the occurrence of fiber clogging at the portion of the guide member where the guide portion transitions from the tapered portion to the straight portion.

  According to a second aspect of the present invention, in the first aspect of the present invention, the shape of the guide portion is such that when the guide member is excited at a predetermined frequency by the excitation means, the outlet of the straight portion and the guide portion The position of the continuous portion between the taper portion and the straight portion is set so as to be a vibration antinode. In this invention, because the position of the continuous portion of the taper portion and the straight portion where fiber clogging is likely to occur is the position of the antinode where the amplitude of vibration is maximum, even if the excitation means is excited with less drive energy, Generation | occurrence | production of the clogging of a fiber can be suppressed in the part which transfers to the straight part from the taper part of a guide member.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the shape of the guide portion is such that the guide portion is excited when the guide member is excited at a predetermined frequency by the excitation means. The total length of the vibration is one wavelength, and the outlet of the straight portion and the position of the continuous portion of the tapered portion and the straight portion are set to be antinodes of vibration. In the present invention, when the drive energy of the excitation means is the same, the amplitude of the position of the straight portion outlet and the continuous portion of the taper portion and the straight portion is maximum as compared with the case where vibration of two wavelengths or more is generated in the guide portion. It becomes. Therefore, it is possible to further suppress the occurrence of fiber clogging at the portion where the guide member transitions from the tapered portion to the straight portion, and it is possible to perform spinning with more stable yarn quality.

  According to the present invention, it is possible to perform spinning with stable yarn quality by suppressing the occurrence of fiber clogging at the portion of the guide member that transitions from the tapered portion to the straight portion.

Hereinafter, an embodiment in which the present invention is embodied in a spinning machine will be described with reference to FIGS.
As shown in FIG. 1A, the draft device 11 has a four-wire configuration including a final delivery roller pair on the downstream side in the fiber bundle traveling direction of the three-wire draft unit. The three-wire draft unit includes a front bottom roller 12, a middle bottom roller 13, and a back bottom roller 14. The middle bottom roller 13 and the back bottom roller 14 are supported via support brackets 16 and 17 fixed to a roller stand 15 constituting the machine base so that the position of the middle bottom roller 13 and the back bottom roller 14 can be adjusted in the front-rear direction.

  On the frame 20 b of the weighting arm 20, a front top roller 21, a middle top roller 22, and a back top roller 23 are positioned at positions corresponding to the front bottom roller 12, the middle bottom roller 13, and the back bottom roller 14, respectively. Are supported through each. A lever 20a is disposed on the weighting arm 20 so as to be rotatable between a pressure position and a release position. In a state where the lever 20a is disposed at a pressure position where the lever 20a contacts the frame 20b of the weighting arm 20 shown in FIG. 1A, the top rollers 21, 22, and 23 supported by the weighting arm 20 are moved to the bottom roller 12. , 13 and 14 are held in a locked state at the pressurizing position (spinning position). Further, when the lever 20a is rotated to the upper release position from the state shown in FIG. 1A, the locked state is released.

  The final delivery roller pair 26 includes a bottom nip roller 26a supported by the roller stand 15 and a top nip roller 26b supported by the weighting arm 20 via a support member. Similarly to the front top roller 21 of the draft device 11, the top nip roller 26b is supported by the weighting arm 20 via a support member every two spindles.

  The fiber bundle focusing device 30 is disposed between the final delivery roller pair 26 and the front bottom roller 12 and the front top roller 21 which are the immediately preceding rollers. As shown in FIG. 2B, the fiber bundle focusing device 30 includes a guide member 31 and excitation means 32 that vibrates the guide member 31. The excitation means 32 vibrates the guide member 31 so as to generate a sound pressure that prevents the fiber bundle F from coming into contact with the guide surface 35 a of the guide member 31.

  The guide member 31 includes a pair of flat plates 33 and a spacer 34 that connects the flat plates 33 at a predetermined interval. Both flat plates 33 include an intermediate portion 33b that is fixed to the spacer 34 at the base end portion 33a by brazing, for example, and has a narrower width than the base end portion 33a, and a guide portion 35 that extends substantially perpendicular to the intermediate portion 33b. ing. That is, the guide member 31 includes a pair of plate-like guide portions 35 provided to face each other. The pair of guide portions 35 have opposite surfaces constituting a pair of guide surfaces 35a, and the guide surfaces 35a guide the fiber bundles F moving from the upstream side to the downstream side so as to narrow the width. The intermediate portion 33 b and the base end portion 33 a of the guide member 31 constitute a support portion for the guide portion 35. In this embodiment, the guide member 31 is continuous with the guide portion 35, and the support portion connected to the excitation means 32 is also composed of two plates.

  As shown in FIG. 3, the guide portion 35 has a straight portion 35 b in which the distance between the opposing surfaces constituting the guide surface 35 a is constant on the downstream side in the traveling direction of the fiber bundle F, and the upstream side in the traveling direction of the fiber bundle F is widened. And a tapered portion 35c formed as described above. The shape of the guide portion 35 is such that when the guide member 31 is excited by the excitation means 32 at a predetermined frequency, the position of the outlet 35d of the straight portion 35b and the continuous portion 35e between the tapered portion 35c and the straight portion 35b is the vibration mode. The position is set so as to deviate from the longitudinal direction of the guide part 35 in the direction where the amplitude of vibration in the direction in which sound pressure is generated on the guide surface 35a of the guide part 35 is minimized. The pair of guide members 31 are formed such that the distance between the opposing straight portions 35b is 1 mm or less, although it varies depending on the spinning conditions.

  In this embodiment, the shape of the guide portion 35 is such that when the guide member 31 is excited by the excitation means 32 at a predetermined frequency, as shown in FIG. 1B, the outlet 35d and the tapered portion 35c of the straight portion 35b. The position of the continuous portion 35e between the straight portion 35b and the straight portion 35b becomes a vibration antinode (a portion where the amplitude of vibration in the direction in which the sound pressure is generated on the guide surface 35a of the guide portion 35 is maximum in the longitudinal direction of the guide portion 35). Is set to In FIG. 1B, the straight portion 35b is on the left side of the straight line L indicated by the two-dot chain line. The shape of the guide portion 35 is such that when the guide member 31 is excited at a predetermined frequency by the excitation means 32, the guide portion 35 vibrates with one wavelength over the entire length of the guide portion 35, and the positions of the outlet 35d and the continuous portion 35e are vibrated. It is set to become a belly.

  A so-called Langevin type vibrator is used as the vibrator 36 constituting the excitation means 32, and includes a pair of ring-shaped piezoelectric elements 37a and 37b. A ring-shaped electrode plate 38 is disposed between the piezo elements 37a and 37b, and metal blocks 39 and 40 that are in contact with the surface of the piezo elements 37a and 37b opposite to the side in contact with the electrode plate 38 are secured by bolts (not shown). The vibrator 36 is configured by tightening and fixing. The bolt is screwed into a screw hole (not shown) formed in the metal block 39 from the metal block 40 side. Both metal blocks 39 and 40 are in a state of being electrically connected to each other via bolts. A flange 39a is formed at the tip of the metal block 39, and the metal block 39 is fixed to the mounting piece 41 at the flange 39a. The vibrator 36 is fixed to the roller stand 15 with a bolt (not shown) via the attachment piece 41.

  The guide member 31 is fixed to a horn 42 that is excited by a vibrator 36. The horn 42 is fixed to one end of the guide member 31 by brazing at the tip thereof. The horn 42 is fixed to the vibrator 36 on the surface opposite to the surface on which the guide member 31 is fastened. The tip surface of the horn 42 is formed on a plane orthogonal to the axial direction of the vibrator 36.

  The vibrator 36 is connected to the oscillator 43. The electrode plate 38 is connected to the oscillator 43 via the wiring 44a, and the ground terminal of the oscillator 43 is connected to the metal block 40 via the wiring 44b. The vibrator 36, the horn 42, and the oscillator 43 constitute the excitation means 32 that vibrates the guide member 31. The oscillator 43 excites the vibrator 36 so as to vibrate the guide member 31 at a frequency higher than the human audible region.

Next, the operation of the apparatus configured as described above will be described.
Prior to the operation of the spinning machine, the positions of the middle bottom roller 13 and the back bottom roller 14 are adjusted to appropriate positions by adjusting the positions of the support brackets 16 and 17 in accordance with the spinning raw material. The positions of the middle top roller 22 and the back top roller 23 are also adjusted corresponding to the positions of the middle bottom roller 13 and the back bottom roller 14.

  When the spinning machine is operated, the fiber bundle F is drafted by the three-line draft portion of the draft device 11, and then guided to the nip portion of the final delivery roller pair 26 through the guide surface 35a of the guide member 31, It is sent from the final delivery roller pair 26. During the operation of the spinning machine, the oscillator 43 is driven to excite the vibrator 36 at a predetermined resonance frequency (for example, around 30 kHz) of the guide member 31, and the horn 42 is longitudinally vibrated so that the guide member 31 is moved via the horn 42. It bends and vibrates. At this time, since the guide portion 35 extends in the direction in which the fiber bundle F is pulled out, the guide portion 35 vibrates in a wave shape when viewed in plan, and the belly oscillates in the longitudinal vibration direction (left and right direction in FIG. 2) of the horn 42. There are (a part where the amplitude is maximum) and a node (a part where the amplitude is minimum). After passing the nip point of the bottom nip roller 26a and the top nip roller 26b, the fiber bundle F moves downstream while being twisted and wound around a bobbin (not shown). The final delivery roller pair 26 is rotated slightly faster than the surface speeds of the front bottom roller 12 and the front top roller 21, and the fiber bundle F is turned and twisted after passing the nip point of the final delivery roller pair 26 in an appropriate tension state. Moves downstream while being hung.

  The fiber bundle F drafted by the three-line draft section is guided to the final delivery roller pair 26 in a state where the width is compressed to 1 mm or less while passing through the guide surface 35a, and passes the nip point. Therefore, as compared with a spinning machine equipped with a three-line draft device that is not equipped with the fiber bundle concentrating device 30, the generation of fluff and cotton falling are suppressed and the yarn quality is improved.

  When guiding the fiber bundle F in a non-contact state using the fiber bundle concentrator 30 while guiding it, the fiber clogging in the continuous portion 35e of the straight portion 35b and the tapered portion 35c is suppressed, the number of fluffs is reduced, It has been found that simply guiding the fiber bundle F in a non-contact state is insufficient for improving the yarn quality to reduce yarn unevenness. And as shown in FIG. 4, when the amplitude of the guide part 35, especially the exit 35d of the straight part 35b, and the amplitude of the continuous part 35e were too small, it discovered that thread | yarn quality deteriorated.

  In this embodiment, when the guide member 31 is excited by the excitation means 32, the shape of the guide portion 35 is formed such that the guide member 31 vibrates in a state where the outlet 35d and the continuous portion 35e of the straight portion 35b become belly. Therefore, when the guide member 31 is excited, the position of the continuous portion 35e between the taper portion 35c and the straight portion 35b that is likely to cause fiber clogging when the vibration amplitude is insufficient is the position of the antinode where the amplitude is maximum. Therefore, the sound pressure acting on the fiber bundle F at the continuous portion 35e is also increased, and the driving energy of the excitation means 32 necessary for exciting the guide member 31 in a state in which the clogging of the fibers in the guide portion 35 is suppressed is reduced. can do. Moreover, since the exit 35d of the straight part 35b is also in the position of the antinode of vibration, the amplitude can be ensured. That is, the amplitudes of the outlet 35d of the straight portion 35b and the continuous portion 35e at the time of excitation become X or more in FIG. 4, and the occurrence of yarn quality deterioration or yarn breakage is suppressed.

According to this embodiment, the following effects can be obtained.
(1) The fiber bundle focusing device 30 includes an excitation means 32 that vibrates the guide member 31 so as to generate sound waves having a sound pressure that prevents the fiber bundle F from contacting the guide surface 35a. Therefore, the fiber bundle F can be guided in a low friction state in a state in which the friction state of the guide surface 35a is prevented from being deteriorated with time due to wear of the guide surface 35a due to friction with the fiber bundle F or adhesion of foreign matter. it can.

  (2) The guide member 31 includes a pair of plate-like guide portions 35 constituting the guide surface 35a, and the pair of guide portions 35 is a straight portion 35b having a constant interval between the opposing surfaces constituting the guide surface 35a. And a taper portion 35c formed so that the upstream side in the traveling direction of the fiber bundle F is widened so that the straight portion 35b is on the downstream side in the traveling direction of the fiber bundle F. The shape of the guide portion 35 is set so that the position of the outlet 35d of the straight portion 35b and the continuous portion 35e is shifted from the vibration node when the guide member 31 is excited by the excitation means 32 at a predetermined frequency. Has been. Therefore, a state where the positions of the outlet 35d of the straight portion 35b and the continuous portion 35e coincide with the vibration nodes and a sufficient sound pressure on the fiber bundle F cannot be obtained is avoided, and the taper of the guide portion 35 of the guide member 31 is avoided. It is possible to perform spinning with stable yarn quality by suppressing the occurrence of fiber clogging at the portion that transitions from the portion 35c to the straight portion 35b.

  (3) The shape of the guide part 35 is such that when the guide member 31 is excited by the excitation means 32 at a predetermined frequency, the outlet 35d of the straight part 35b and the position of the continuous part 35e between the tapered part 35c and the straight part 35b are It is set to be a vibration belly. Therefore, since the position of the continuous portion 35e between the tapered portion 35c and the straight portion 35b where fiber clogging is likely to occur is the antinode position where the amplitude of vibration is maximized, the excitation means 32 is excited with less drive energy. In addition, it is possible to suppress the occurrence of fiber clogging at the portion of the guide member 31 that transitions from the tapered portion 35c to the straight portion 35b.

  (4) The shape of the guide portion 35 is such that when the guide member 31 is excited by the excitation means 32 at a predetermined frequency, the guide portion 35 vibrates at one wavelength over the entire length of the guide portion 35, and the outlet 35d and the tapered portion 35c of the straight portion 35b. The position of the continuous portion 35e between the straight portion 35b and the straight portion 35b is set to be an antinode of vibration. Therefore, when the drive energy of the excitation means 32 is the same, the exit 35d of the straight portion 35b and the continuous portion 35e of the straight portion 35b and the outlet 35d of the straight portion 35b are compared with the case where the guide portion 35 generates vibrations of two or more wavelengths. The position amplitude is maximized. Therefore, it is possible to further suppress the occurrence of fiber clogging at the portion of the guide member 31 that transitions from the tapered portion 35c to the straight portion 35b, and to perform spinning with more stable yarn quality.

  (5) The guide member 31 has a structure in which two flat plates 33 are connected via a spacer 34. Therefore, the guide part 35 having a desired shape can be accurately configured at a predetermined interval as compared with a case where a single plate is formed by bending.

The embodiment is not limited to the above, and may be configured as follows, for example.
○ When the guide member 31 is excited, the shape of the guide portion 35 is not the vibration of one wavelength in the entire length of the guide portion 35, but the outlet 35d of the straight portion 35b and the tapered portion 35c and the straight portion 35b. What is necessary is just the shape where the position of the continuous part 35e becomes an antinode of vibration. For example, the exit 35d and the continuous portion 35e become antinodes, and not only one node exists between the outlet 35d and the continuous portion 35e, but two-wavelength vibration with two nodes exists. Or, it may be made to vibrate with N wavelengths (N is a natural number). However, when the length of the guide portion is the same, the lower the frequency of vibration, the larger the amplitude of the antinode portion, so it is preferable that the guide portion 35 has a single-wavelength vibration.

  The shape of the guide portion 35 is not limited to the shape in which the position of the outlet 35d and the continuous portion 35e becomes a vibration antinode when the guide member 31 is excited, and the position of the outlet 35d and the continuous portion 35e is determined from the vibration node. Any shape may be used as long as the position is shifted. In the shape in which the position of the outlet 35d and the continuous portion 35e becomes a vibration node, the amplitude at the position of the outlet 35d and the continuous portion 35e cannot be set to a necessary magnitude, but if the position is shifted from the node, the excitation means Depending on the energy applied to 32, the amplitude can be made as large as necessary. However, when the position of the outlet 35d and the continuous portion 35e is close to the vibration node, the energy required to increase the amplitude at the position of the outlet 35d and the continuous portion 35e becomes large. Therefore, the outlet 35d and the continuous portion 35e are large. A shape in which the position of is near the antinode of vibration is preferable. The vicinity of the vibration antinode means a range within 20% of the distance between the adjacent antinode and the node, for example.

  The guide member 31 includes a pair of plate-shaped guide portions 35 provided to face each other so as to form a guide surface 35a, and the guide portion 35 includes a straight portion 35b and a tapered portion 35c. It is sufficient that the two flat plates 33 are connected by the spacers 34. For example, as shown in FIG. 5A, a guide member 31 having a structure in which a base end portion 33a, an intermediate portion 33b, and a guide portion 35 fixed to the horn 42 are integrally formed, or as shown in FIG. As shown, only the guide portion 35 may be formed in a pair of plates, and the base end portion 33a and the intermediate portion 33b may be formed by a single plate portion. However, the configuration in which the two flat plates 33 are connected by the spacers 34 and the configuration in FIG. 5A are compared with a configuration in which only the guide portion 35 shown in FIG. 5B is formed in a pair of plates. Thus, it is easy to form the guide portion 35 in a shape that vibrates in a desired vibration state.

  The shape of the guide portion 35 may be such that the position of the continuous portion 35e between the tapered portion 35c and the straight portion 35b is not substantially at the center of the guide portion 35, but the straight portion 35b side is long. For example, as shown in FIG. 6, when the shape of the guide part 35 is such that the length from the continuous part 35e to the outlet 35d is approximately twice the length from the continuous part 35e to the inlet of the guide part 35. However, it is good also as a shape corresponding to 3/2 wavelength that four positions of the exit 35d, the exit 35d, the center part of the continuous part 35e, and the entrance of the continuous part 35e and the taper part 35c become antinodes of vibration. In this case, the position of the intermediate part 33b that supports the guide part 35 may be any of the three positions serving as nodes.

The shape of the guide part 35 may be a shape with a short straight part 35b side. However, when the straight portion 35b has a short shape, it is difficult to make the guide portion 35 compact.
The tapered portion 35c is not limited to a linearly extending shape, that is, a planar shape, and may be formed as a curved surface. In this case, since the taper part 35c and the straight part 35b continue smoothly in the continuous part 35e, it is preferable. Further, when the tapered portion 35c has a shape extending linearly, only the vicinity of the continuous portion 35e with the straight portion 35b may be formed as a curved surface so as to be smoothly continuous with the straight portion 35b.

As in the configuration described in Patent Document 1, the guide member 31 may be configured by two independent plates, and the vibrator 36 may be attached to each.
The guide part 35 is not limited to a shape in which the width (height) on the inlet side and the outlet side is smaller than the central part, and the guide part 35 may have a constant width from the inlet to the outlet.

O Instead of fixing the guide member 31 to the horn 42 by brazing, it may be fixed by soldering, an adhesive, or tightened and fixed with a bolt.
The shape of the horn 42 is not limited to a shape such as a truncated cone, and the tip side is narrow, and may be, for example, a cylindrical shape.

The exciter 32 may be configured as a vibrator using a magnetostrictive element or a giant magnetostrictive element instead of the vibrator 36 formed using a piezoelectric element.
The following technical idea (invention) can be understood from the embodiment.

  (1) In the invention according to any one of claims 1 to 3, the guide member is continuous with the guide portion, and the support portion connected to the excitation means is also composed of two plates. ing.

(2) In the invention according to any one of claims 1 to 3 and the technical idea (1), the guide member is configured by connecting two plates with a spacer.
(3) A ring spinning machine including the fiber bundle focusing device according to any one of claims 1 to 3 and the technical ideas (1) and (2).

(A) is a side view of the draft device in one embodiment, (b) is a side view of a guide member. (A) is a front view of a fiber bundle guide device, (b) is a side view of a guide part. Schematic which shows the relationship between the guide member and bottom roller seen from the top side. The diagram which shows the relationship between yarn quality and amplitude. (A), (b) is a front view of the guide member of another embodiment, respectively. The schematic diagram which shows the shape of the guide part of another embodiment.

Explanation of symbols

  F ... Fiber bundle, 30 ... Fiber bundle focusing device, 31 ... Guide member, 32 ... Excitation means, 35 ... Guide portion, 35a ... Guide surface, 35b ... Straight portion, 35c ... Tapered portion, 35d ... Outlet, 35e ... Continuous portion .

Claims (3)

A guide member having a guide surface for guiding the width of the fiber bundle moving from the upstream side to the downstream side; and a sound pressure for preventing the fiber bundle from contacting the guide surface. A fiber bundle concentrating device in a spinning machine comprising excitation means for vibrating a guide member,
The guide member includes a pair of plate-shaped guide portions provided to face each other so as to constitute the guide surface, and the pair of guide portions has an interval between the opposing surfaces constituting the guide surface. A fixed straight portion and a tapered portion formed so that the upstream side in the traveling direction of the fiber bundle is widened so that the straight portion is downstream in the traveling direction of the fiber bundle, and the shape of the guide portion When the guide member is excited at a predetermined frequency by the excitation means, the outlet of the straight portion and the position of the continuous portion of the tapered portion and the straight portion are shifted from the vibration node. A fiber bundle concentrator in a spinning machine set to 1.   The shape of the guide portion is such that when the guide member is excited at a predetermined frequency by the excitation means, the outlet of the straight portion and the position of the continuous portion between the tapered portion and the straight portion become an antinode of vibration. The fiber bundle concentrating device in the spinning machine according to claim 1, which is set as described above.   The shape of the guide portion is such that when the guide member is excited at a predetermined frequency by the excitation means, the guide portion is vibrated with one wavelength, and the outlet of the straight portion, the tapered portion, and the straight portion The fiber bundle concentrating device in a spinning machine according to claim 1 or 2, wherein the position of the continuous portion is set to be a vibration antinode.

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