KR20040025574A - Fiber bundle collecting device of a spinning machine and a ring spinning frame equipped with thereof - Google Patents

Abstract

PURPOSE: To improve yarn quality by restraining the occurrence of fluff from that of a conventional apparatus for bundling each fiber strand according to simple constitution and to suppress transverse movement of air-permeable aprons. CONSTITUTION: An apparatus for bundling each fiber strand is provided on the downstream side of a final delivery roller pair of a drafting apparatus. The apparatus for bundling the fiber strand is equipped with a delivery part and a suction pipe 32 provided with a sliding surface 32b having suction holes 32a bored on the upstream side in the movement direction of the fiber strand relatively to a nipping point of the delivery part. A stretching member 33 is installed on the side opposite to the suction pipe 32 with a bottom nip roller 35a constituting the delivery part and sandwiched therebetween. The air-permeable aprons 34 are stretched over the suction pipe 32, stretching member 33 and bottom nip roller 35a. Regulating guides 49 preventing the transverse shift of the air-permeable aprons 34 are integrally formed in the suction pipe 32. The regulating guides 49 are formed by removing a part of stepped parts 50 at a remarkably high level formed on the front side of the top surface of the suction pipe 32 so as to extend in the longitudinal direction according to the width of the air-permeable aprons 34.

Description

FIBER BUNDLE COLLECTING DEVICE OF A SPINNING MACHINE AND A RING SPINNING FRAME EQUIPPED WITH THEREOF}

The present invention relates to a fiber bundle focusing device of a spinning machine, and more particularly, to a fiber bundle focusing device installed downstream of a drafting device (drafting part) of a spinning frame and focusing the fiber bundles drafted by the drafting device. will be.

Various fiber bundle collection devices have been proposed to improve yarn quality, such as reducing the occurrence of fluff, by concentrating drafted fibers before the fiber bundle is subjected to torsion. Endless porous belts (porous aprons) have been frequently used for fiber bundle focusing and delivery, which is a fundamental function of such devices.

For example, as patent document 1, Paragraph 0022, 0030 of Unexamined-Japanese-Patent No. 11-286837, and FIGS. 1 and 7 can be referred.

In addition, as patent document 2, Paragraph 0018 of Unexamined-Japanese-Patent No. 2000-34631 and FIG. 1 can be referred.

See also, as Patent Document 3, FIGS. 2 and 3 of German Laid-Open Patent No. DE 19708410A1.

The porous belt is moved while covering the suction hole extending in the direction in which the fiber bundle moves. In order to control the movement of a porous belt in the width direction (that is, the transverse direction), it is disclosed in Patent Document 1 to provide a tensioning element formed of plastic for imparting and guiding a tensile force to the porous belt. Moreover, it is disclosed by patent document 1 to provide the lateral guide couple | bonded with a porous belt in the hollow profile with a suction hole. In addition, Patent Document 2 discloses guiding the porous belt from the side along the lateral end of the tension roller used to tension the porous belt.

As shown in Figs. 8A and 8B of the specification of the present application, the apparatus disclosed in Patent Document 3 includes a delivery roller pair 72 provided with a porous apron 71, and the suction air stream is used to produce the porous apron 71. It acts on the transmission surface of the said porous apron 71 through the groove hole formed in the guiding apron guide 73. The porous apron 71 is wrapped around the afron guide 73, the delivery roller 72a, and the tension imparting member 74. The said delivery roller 72a is made to rotate by the friction with the friction roller part 75a of the rotating shaft 75 provided in parallel with a front bottom roller (not shown). The hinged motion of the porous apron 71 is controlled by the side of the friction roller portion 75a.

When the spinner with the fiber focusing device is used to manufacture the yarn through spinning, the yarn specifications and fluff are compared to the case where the spinning machine without the fiber bundle focusing device is used to manufacture the yarn through spinning. Occurrence is reduced resulting in an increase of U%. However, further improvements in this regard are required.

In the fiber bundle focusing device of the prior art, no special design has been made downstream of the nip to improve the yarn quality. The inventors of the present invention provide a suction pipe that applies suction to the fiber bundle through a venting apron (porous apron) downstream of the nip point, and provides a wrapping member wrapped with the aeration apron downstream of the nip point to increase the fleece angle. By devising a fiber bundle collecting device that can achieve an improvement in yarn quality. In this case, it is required to prevent the transverse displacement of the vent apron. The term "less angle" refers to a line segment connecting the center of curvature and the nip point of the circular arc surface where the fiber bundle (flesh) passing through the nip point to the drawing position and the center of curvature and the pull point of the fiber bundle (F) The angle made by the line segment.

When there is a wrapping member that surrounds the ventilation apron (perforated afron) on each of the upstream side and the downstream side of the nip point, the side of the ventilation apron is compared with the case where the wrapping member does not exist on the downstream side. The presence of adjusting members for regulating directional (width direction) motion is an important consideration. The aeration apron must be replaced at the end of each cleaning cycle or operating life of a particular time period. However, in the configuration in which the adjusting member is provided in addition to the suction tube and the wrapping member, the replacement of the ventilation apron is cumbersome because the engagement with the adjusting member must be released at the time of replacement, which is usually provided for one radiator. It takes a lot of time to replace hundreds to thousands of aeration aprons. In addition, in the case of the configuration disclosed in Patent Document 3 including a special process performed on the rotating shaft, the cost is increased.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fiber converging apparatus capable of improving the yarn quality by suppressing the lateral movement of the aeration apron while suppressing the occurrence of fluff compared to the prior art while having a simple configuration.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic perspective view which shows the main part in which a part of the fiber bundle focusing apparatus which concerns on embodiment of this invention was abbreviate | omitted.

2 is a partial cross-sectional schematic side view showing an embodiment of the present invention.

3 is a partial schematic view showing the relationship between the suction pipe and the bottom nip roller.

4A is a partial schematic view of the fiber bundle collecting device viewed from the front with respect to the fiber bundle moving direction, and FIG. 4B is a front view of the rotation shaft.

5 is a partially enlarged view of FIG. 2.

6A is a schematic operation diagram when a lapping member is present, and FIG. 6B is a schematic operation diagram when no lapping member is present.

7 is a partial cross-sectional view showing yet another embodiment of the present invention.

8A is a front view showing the structure of the prior art, and FIG. 8B is a sectional view of FIG. 8A taken along the line B-B.

* Description of the symbols for the main parts of the drawings *

11: drafting device 12: front bottom roller

13: center bottom roller 14: rear bottom roller

15: roller stand 16: floor apron

19: Front upper roller 20: Center upper roller

21: rear upper roller 30: fiber bundle

31: sending part 32: suction tube

33: lapping member 34: apron

35: rotating shaft 36: support member

38: support arm 39: bearing

40: end plug 41: gear

In order to achieve the above object, the present invention relates to a fiber bundle focusing apparatus of a spinning machine provided downstream of the final delivery roller pair of the drafting portion of the spinning machine and focusing the fiber bundles drafted from the drafting portion. The sending part which has a nip roller; A suction apron provided on an upstream side of the nip point of the delivery section with a direction of movement of the fiber bundle and having a guide surface provided with a suction slit, and a ventilation apron configured to rotate while sliding on the guide surface, A partially wrapped lapping member is provided parallel to the suction pipe downstream of the nip point of the delivery section with respect to the direction of movement of the fiber bundle, and an adjustment guide for suppressing lateral displacement of the aeration apron is provided with at least one of the suction pipe and the wrapping member. It is formed integrally.

According to the present invention, the fiber bundle drafted by the drafting portion is concentrated and conveyed by the fiber bundle focusing device provided on the downstream side of the final delivery roller pair of the drafting portion. Therefore, compared with the spinning machine which does not have a fiber bundle, it can suppress not only fall surface but also generation | occurrence | production of fluff, and, thereby, can improve the real quality. In addition, because of the lapping member provided on the downstream side of the nip point separately from the suction pipe, the effect of suppressing fluff generation is further improved and the quality of yarn is improved. The aeration apron that delivers the fiber bundles moves in a state where its transverse motion is inhibited by the action of the adjusting guide, so that the delivery of the fiber bundles is made in a stable manner. In addition, the adjustment guide is formed integrally with at least one of the suction pipe and the wrapping member, thereby simplifying the configuration as compared with the case where a dedicated adjustment guide is provided separately from the suction pipe and the wrapping member.

An embodiment of the present invention will be described with reference to FIGS. 1 to 6. 1 is a perspective view of a unit in which a suction pipe, a wrapping member, a vent apron, and the like are installed. 2 is a partial cross-sectional view showing one side of the drafting device and the fiber focusing device. Fig. 3 is a diagram partially showing the relationship between the bottom roller of the drafting device and the suction portion of the fiber bundle focusing device and the bottom nip roller, and the top roller side is omitted. Fig. 4A is a schematic view of the fiber bundle focusing device as seen from the direction of drawing the fibers at the nip point (the direction seen from the front with respect to the fiber bundle moving direction in the drafting device).

As shown in Fig. 2, the drafting device 11 as a draft portion has a three-wire structure having a front bottom roller 12, a center bottom roller 13, and a rear bottom roller 14. The front bottom roller 12 is supported at a predetermined position with respect to the roller stand 15 constituting the base frame of the machine, and the center and rear bottom rollers 13, 14 are positioned in the longitudinal direction for the roller stand. It is supported through the support brackets 13a and 14a fixed to 15. The support brackets 13a and 14a are fixed at predetermined positions by bolts and nuts (both not shown) passing through the long holes formed in the roller stand 15. The bottom apron 16 surrounds the bottom tensor 17 and the center bottom roller 13.

The front top roller 19, the center top roller 20, and the rear top roller 21 are weighted at positions corresponding to the front bottom roller 12, the center bottom roller 13, and the rear bottom roller 14. Each is supported by a weighting arm 18. Each top roller 19, 20, 21 is supported in two spindle units. The front bottom roller 12 and the front top roller 19 constitute a final delivery roller pair of the drafting device 11.

The weight arm 18 is arranged such that the lever 18a is rotatable to the pressing position and the releasing position. In the state where the lever 18a is disposed at the pressing position in contact with the frame 18b of the weight arm 18 shown in FIG. 2, the upper rollers 19, 20, 21 supported by the weight arm 18 are The locked state to be in the press position (radiation position) pressed against the bottom rollers 12, 13, 14 side is maintained. In addition, when the lever 18a rotates from the position shown in FIG. 2 to the upper release position, the locked state is released.

As shown in FIG. 2, the fiber bundle focusing device 30 is disposed downstream of the final delivery roller pair of the drafting device 11. The fiber bundle concentrator 30 includes a delivery section 31, a suction pipe 32, a lapping member 33, and a ventilation apron 34. The said sending part 31 is the upper end pressurized by the bottom nip roller 35a through the bottom nip roller 35a formed in the rotating shaft 35 arrange | positioned in parallel with the front bottom roller 12, and the ventilation apron 34. It is comprised by the nip roller 31a. As shown in Figs. 2 and 5, the suction pipe 32 is provided on the upstream side of the nip point of the bottom nip roller 35a with respect to the moving direction of the fiber bundle F, and the lapping member 33 is disposed on the downstream side. .

As shown in FIG. 4A, in the fiber bundle concentrator 30 of this embodiment, the top nip roller 31a is, in all two spindles, like the top rollers 19, 20, 21 of the drafting device 11. It is supported by the weight arm 18 via the support member 36 (shown in FIGS. 2 and 5). In this embodiment, it should be noted that the supporting member 36 is formed integrally with the supporting member of the front upper roller 19.

On the other hand, on the bottom side of the fiber bundle focusing device 30, half of the spindles arranged between the roller stands 15 of the drafting device 11, that is, in this embodiment, four spindles constitute one unit. As shown in Fig. 3, in the intermediate position of the roller stands 15 arranged at predetermined intervals in the longitudinal direction of the machine base, with the base end supported by the support beam 37 extending in the longitudinal direction of the machine base. The support arm 38 is disposed, and the rotary shaft 35 is supported between the roller stand 15 and the support arm 38.

As shown in Fig. 4B, the rotating shaft 35 is formed in a predetermined length corresponding to the plurality of spindles (four spindles in this embodiment), and the bearings 39 are fixed to both ends thereof. As shown in FIG. 1, the rotating shaft 35 is attached to the unit in a state where the bearing 39 is fitted to the end plug 40. The suction pipe 32 and the lapping member 33 are also supported with their ends fitted to the end plugs 40 supporting the rotating shaft 35.

As shown in Fig. 4A, the end plug 40 is supported by the support portions 15a and 38a formed on the roller stand 15 and the support arm 38 at the engaging portion 40a, whereby the rotating shaft 35 is supported by the roller. It is rotatably supported between the stand 15 and the support arm 38. The supporting portions 15a and 38a are formed to support the two end plugs 40, and can also support the end plugs 40 mounted at the ends of the adjacent rotating shafts 35.

The support part 15a is formed of the block fixed to the roller stand 15, and has the engaging recess which extends obliquely upwards in front of a machine base. In addition, the support portion 38a has an engaging recess extending obliquely upward from the front of the machine base. The end plug 40 has a coupling portion 40a that is engageable with the coupling recess, and is formed to be able to engage with the supporting portions 15a and 38a in one snap movement in the coupling portion 40a.

The rotary shaft 35 has a gear 41 provided to rotate integrally with the rotary shaft 35. The gear 41 is provided at a position away from the center of the rotating shaft 35 to the end side by one spindle unit length. As shown in FIG. 3, the gear part 12a is formed in the front bottom roller 12 in the position which opposes the gear 41. As shown in FIG. In addition, the intermediate gear 43 meshed with the gear portion 12a and the gear 41 is rotatably supported by the support arm 42 whose base end is fixed to the support beam 37, such as the support arm 38. It is supported. That is, the torque of the front bottom roller 12 is transmitted to the rotating shaft 35 via the gear portion 12a, the intermediate gear 43, and the gear 41.

As shown in Fig. 2, in the machine base of the spinning frame, a duct 44 acting as a suction source (negative pressure source) for the fiber focusing device 30 is provided in the longitudinal direction (direction perpendicular to the plane of Fig. 2). It is arranged to extend. A suction device 45 for maintaining the negative pressure in each duct 44 is connected to each duct 44 via a pipe 46. A fan motor in which the fan 47a is driven by the motor 47 is used as the suction device 45. As shown in FIG. 2, the duct 44 is arranged at the upper rear side of the drafting device 11 and at the center of the device base of the spinning machine, and the suction device 45 is disposed below the duct 44. The suction pipe 32 has a connecting portion 32c (FIG. 1) formed in its longitudinal center portion and is connected to the duct 44 through the connecting pipe 48 in a state extending in parallel with the duct 44. The connecting tube is fitted with the connecting portion 32c.

The suction pipe 32 has a sliding surface 32b which acts as a guide surface, which extends upstream with respect to the direction in which the fiber bundle (fleze) F moves with respect to the nip point of the bottom nip roller 35a. A slit suction hole 32a is formed. The suction pipe 32 is adapted to guide the aeration apron 34 close to the nip point between the front bottom roller 12 and the front top roller 19.

As shown in FIG. 1, 3, etc., the adjustment guide 49 for preventing the lateral displacement of the said ventilation apron 34 is formed integrally with the said suction pipe 32. As shown in FIG. The adjustment guide 49 is formed by removing a portion of the raised step 50 to coincide with the width of the aeration apron 34, and the step 50 is arranged at the upper end of the suction pipe 32 to extend longitudinally. It is formed in the front side of a surface (downstream with respect to the moving direction of the fiber bundle F). In FIG. 1, the aeration aprons 34 are shown one by one for the explanation of the funnel for the suction hole 32a and the adjustment guide 49.

In order to facilitate the manufacture of the suction pipe 32 having the control guide 49 integrally formed, the suction pipe 32 is extruded to have the step 50 so that the control guide 49 is formed. The height of the portion of the suction pipe 32 is raised. Then, a cutting process for removing a part of the step portion 50 and processing of the suction hole 32a are performed to fit the width of the ventilation apron 34.

The wrapping member 33 has a sliding surface 33a as a guide surface for slidingly guiding the ventilation apron 34. The lapping member 33 has a distance L (FIG. 6A) between the nip point and the position where the fiber bundle F leaves the ventilation apron 34 on the downstream side of the nip point is 5 mm or more, more preferably 8 To 10 mm. The wrapping member 33 is made of a bar-shaped solid member.

The aeration apron 34 is partially wrapped in the suction pipe 32, the other in the lapping member 33, and the other in contact with the bottom nip roller 35a, so as to rotate the bottom nip roller 35a. It rotates while rolling on the sliding surfaces 32b and 33b. As this embodiment, the ventilation apron 34 is formed from the fabric which can ensure appropriate breathability.

As shown in FIGS. 2 and 4A and the like, suction of a single-type pneumatic field acting to suck the fiber bundle F sent out from the drafting device 11 near the bottom of the lapping member 33 when the thread is broken. The tip end of the nozzle 51 is arranged. The base end of the suction nozzle 51 is connected to a pneumatic duct 52 common to all spindles.

Next, the operation of the apparatus will be described.

When the spinning frame is activated, each fiber bundle F is drafted through between the bottom rollers 12-14 and the top rollers 19-21, and then guided to the fiber bundle focusing device 30. The upper nip roller 31a of the sending part 31 rotates slightly faster than the surface speeds of the front bottom roller 12 and the front top roller 19, and the fiber bundle F is placed at the sending part 31 in an appropriate tension state. After passing through the nip of, it goes to the downstream while being twisted.

Further, the suction action of the duct 44 acts on the suction pipe 32 through the connecting pipe 48, and the suction action of the suction hole 32a formed in the sliding surface 32b causes the fiber bundle to pass through the ventilation apron 34. (F) crazy. Then, the fiber bundle F moves while being sucked and focused to a position corresponding to the suction hole 32a. As a result, as compared with the spinning machine without the fiber bundle focusing device 30, the generation of fluff and the occurrence of fallfall are suppressed, and the quality of the yarn is improved.

As shown in FIG. 6A, the lapping member 33 separately installed from the suction tube 32 is provided downstream of the suction tube 32, so that the pleasing angle θ1 shown in FIG. 4A has no lapping member 33. It is larger than the release angle θ2 (Fig. 6B) in the case. In the state where the release angle is large, the distance covered by the fiber bundle F is relatively long after passing through the nip point and detaching from the surface of the aeration apron 34. Therefore, due to the twisting action acting on the fiber bundle F from the wrapping portion, the fiber f rotates and the fibers f scattered from the circumference of the fiber bundle F come into contact with the aeration apron 34 and thus the fiber ( f) is easily twisted into the fiber bundle F, whereby the occurrence of fluff is suppressed. In the configuration in which the lapping member 33 is present, the fiber bundle F reciprocates while rolling on an apron. As a result, the fiber f scattered from the circumference of the fiber bundle F is easily twisted into the fiber bundle F.

It is a common idea that an increase in the angle of delamination breaks the yarn. However, in the case where the fiber bundle focusing device 30 is provided, the fiber bundle F is focused by the suction action of the suction hole 32a and pulled out from the nip point, so that the twist due to the winding action is near the nip point. By this, even when the yarn strength increases and the fleece angle increases, the increase in the occurrence of yarn breakage is suppressed. Therefore, the fall of productivity due to thread breakage can be suppressed.

The aeration apron 34 adapted to deliver the fiber bundle F is caused to move (rotate) with its lateral displacement suppressed due to the action of the adjustment guide 49, thus transferring the fiber bundle F. This is made stable. Among the adjustment guides 49, the adjustment guide 49 for adjusting the aeration apron 34 wrapped at a position close to the connection portion 32c connected to the connection pipe 48 is removed by the step 50. By the end surface thereof, the movement of the ventilation apron 34 to both sides in the width direction is controlled. With respect to the adjustment guide 49 for adjusting the aeration apron 34 wrapped at a position close to the end plug 40, the adjustment to the movement of the aeration apron 34 toward the center of the suction pipe 32 is stepped. The section 50 is made by the cross section of the adjusting member 49, and the adjustment to the movement of the ventilation apron 34 toward the end side is made by the cross section of the end plug 40.

This embodiment provides the following effects.

(1) The suction pipe is provided on the upstream side of the nip point of the delivery section 31 with respect to the direction in which the fiber bundle F moves. On the downstream side of the nip point with respect to the direction in which the fiber bundle F moves, a wrapping member 33 wrapped with a part of the ventilation apron 34 is provided in parallel to the suction pipe 32. Therefore, the fleece angle is increased, and the effect of preventing the occurrence of fluff is increased as compared with the structure in which the lapping member 33 is not present, thereby improving the seal quality.

(2) The adjustment guide 49 for preventing the lateral displacement of the ventilation apron 34 is formed integrally with the suction pipe 32. Thus, the ventilation apron 34 provided to deliver the fiber bundle F is caused to move (rotate) in a state where the transverse displacement is suppressed by the action of the adjustment guide 49. As a result, the fiber bundle F is delivered in a stable manner. Further, the structure is simpler than when the control guide of the pontoon is provided separately from the suction pipe 32.

(3) The suction pipe 32 in which the adjustment guide 49 is formed is extruded to have a step 50, so that a part of the suction pipe 32 in which the adjustment guide 49 is formed is raised in height. do. The adjustment guide 49 is formed by removing a portion of the step portion 50 to fit the width of the vent apron 34. Therefore, the manufacturing of the adjusting guide is easier than the case where the adjusting guide is installed in the suction pipe by welding, bonding, or screwing.

(4) The wrapping member 33 is provided such that the distance L between the nip point of the delivery part 31 and the position where the fiber bundle leaves the vent apron 34 at the downstream side of the nip point is 5 mm or more. do. Therefore, when the fiber bundle F moves in a rolled state on the aeration apron 34, the fiber f scattered from the fiber bundle F is easily twisted into the fiber bundle F, whereby the effect of suppressing the occurrence of fluff is reduced. Is improved.

(5) The wrapping member 33 is composed of a bar-shaped solid member. Therefore, production of the member is easy as compared with the case where the wrapping member 33 is formed in a tubular shape. In addition, even when the wrapping member 33 collides with another member during installation, disassembly and maintenance operations, the wrapping member is not easily broken.

(6) The force by which the upper nip roller 31a pressurizes the ventilation apron 34 is produced by the bottom nip roller 35a, and the pressing force of the upper nip roller 31a does not act on the suction pipe 32. Therefore, compared with the case of the conventional apparatus (Japanese Patent No. 11-286837 A), less rigidity of the suction pipe 32 is required, and sufficient strength can be ensured even when made of resin.

(7) The duct 44, which acts as a negative pressure source, is provided independently of a pneumatic device for sucking the plunges drawn out from the drafting portion at the time of seal failure. Therefore, the suction pressure of the suction pipe 32 can be easily adjusted to an appropriate pressure.

The above-described embodiments should not be interpreted limitedly. For example, the following structures are also possible.

It is sufficient that the adjustment guide 49 is formed in at least one of the suction pipe 32 and the wrapping member 33. For example, as shown in FIG. 7, it is also possible to employ | adopt the structure in which the said adjustment guide 49 is formed in the lapping member 33. As shown in FIG. When the adjusting guide 49 is formed on the wrapping member, it is easier to wash / remove dust or the like accumulated between the adjusting guide and the aeration apron as compared with the case where the adjusting guide is formed on the suction pipe 32 disposed upstream. .

The adjustment guide 49 may also be formed in both the suction pipe 32 and the wrapping member 33.

Instead of forming the wrapping member 33 as a solid member, it can be formed as a tubular member. When formed into a tubular member, the wrapping member 33 can be made lightweight.

The distance L is 5 in the nip point of the sending part 31 and the position where the fiber bundle F leaves the ventilation apron 34 on the downstream side of the nip point of the sending part 31. As long as it is mm or more, the fluff suppression effect is satisfactory. There is no particular upward limitation on the distance L. However, if the distance is made too long, it does not help greatly to suppress the occurrence of fluff, but merely increases the size of the machine base. Thus, the range of distances is preferably 8 to 10 mm.

The structure of the dispensing part of the fiber converging device 30 is not limited to the converging device provided with the nip roller pair. For example, in the structure for driving the ventilation apron 34, the suction pipe 32 and the bottom nip roller 35a are removed, the suction pipe of an oval cross section is provided, and the suction hole is moved to a predetermined position of the suction pipe. And a configuration including slidingly wrapping the aeration apron 34 around the outer periphery of the suction tube and the wrapping member 33 may also be adopted. Then, by actively driving the upper nip roller 31a, the ventilation apron 34 is driven by driving the upper nip roller 31a in a state of maintaining pressure contact with the ventilation apron 34. In this case, the tension adjusting function of the ventilation apron 34 can be given to the wrapping member 33.

The lapping member 33 may also be given the possibility of applying a suction action to the fiber bundle F delivered by the ventilation apron 34. For example, in addition to forming the wrapping member 33 using a tube, a suction hole can be provided in the wrapping member 33. In this case, the fiber bundle F moves while being sucked and focused at a position corresponding to the suction hole. Therefore, even after passing through the nip point, the fiber bundle F is moved in the focused state due to the suction action, so that the occurrence of fluff and falling surface is suppressed, and the quality of the yarn is improved. .

The suction pipe 32, the wrapping member 33, and the rotation shaft 35 are not limited to the structure in which four spindle units constitute one unit. Further, a structure in which the spindle units (for example, eight spindle units) between the adjacent roller stands 15 constitute one unit or a structure in which two spindle units constitute one unit can be adopted. In addition, not all units need always have the same number of spindle units, and the number of spindles between adjacent roller stands 15 is divided into different numbers (for example, six and two), so that two corresponding types of The unit can be installed.

The end of the suction tube 32 may be closed. In this case, the end plug 40 does not need to seal the end of the suction pipe 32 in a sealed manner, and the coupling hole to which the bearing 39 is coupled and the end of the suction pipe 32 and the wrapping member 33 It is only necessary to provide a joining portion (coupling hole) to be engaged, thereby facilitating production.

Instead of installing a plurality of ducts 44 extending in the longitudinal direction, it is also possible to install a single duct extending through the entire length of the machine base of the spinning machine.

The position of the duct 44 is not limited above the rear side of the drafting device 11. The duct may also be arranged at the rear side or rear side bottom of the drafting device 11.

Instead of the arrangement in which the duct 44 is shared by the suction pipes 32 arranged on the left and right sides of the radiator, an arrangement in which the ducts are arranged in two rows on both the left and right sides so as to extend in the longitudinal direction of the machine base of the spinning machine may also be adopted. Can be.

Instead of forming the venting apron 34 into a woven fabric, the venting apron 34 may also be formed of a knitted fabric. In such a case, an appropriate level of breathability can be achieved without forming a small hole in the belt forming the ventilated apron 34, whereby the ventilated apron 34 can be manufactured at low cost. Also, due to the elasticity of the knitted fabric, the vent apron 34 can rotate under proper tension without the need to provide a special tensioning device.

Instead of forming the venting apron 34 into a woven or knitted fabric, the venting apron 34 may also be formed by punching a resin belt formed of rubber or elastic resin.

The axis of rotation 35 in which the bottom nip roller 35a is formed is shared by all spindle units, and in the case of the bottom rollers 12, 13, 14 of the drafting device 11, this axis of rotation is the gear end of the machine base. It is also possible to adopt a structure driven by a motor via a gear train installed in the.

A common negative pressure source can also be used for the suction pipe 32 and the pneumatic device.

As the pneumatic device, a flute pneumatic device can also be adopted instead of the single nozzle pneumatic device.

According to the present invention, the fiber bundle drafted by the drafting portion is concentrated and conveyed by the fiber bundle focusing device provided on the downstream side of the final delivery roller pair of the drafting portion. Therefore, compared with the spinning machine which does not have a fiber bundle, it can suppress not only fall surface but also generation | occurrence | production of fluff, and, thereby, can improve the real quality. In addition, because of the lapping member provided on the downstream side of the nip point separately from the suction pipe, the effect of suppressing fluff generation is further improved and the quality of yarn is improved. The aeration apron that delivers the fiber bundles moves in a state where its transverse motion is inhibited by the action of the adjusting guide, so that the delivery of the fiber bundles is made in a stable manner. In addition, the adjustment guide is formed integrally with at least one of the suction pipe and the wrapping member, thereby simplifying the configuration as compared with the case where a dedicated adjustment guide is provided separately from the suction pipe and the wrapping member.

Claims (6)

A fiber bundle focusing device of a spinning machine provided downstream of a pair of final delivery rollers of the drafting portion of the spinning machine and focusing the fiber bundles drafted from the drafting portion, A feeding part having a nip roller, A suction pipe provided on an upstream side of the nip point of the discharge portion with respect to the moving direction of the fiber bundle and having a guide surface provided with a suction slit; And aeration apron configured to rotate and slide while sliding on the guide surface. A wrapping member wrapped with a portion of the aeration apron is provided in parallel to the suction pipe downstream of the nip point of the delivery section with respect to the direction of movement of the fiber bundle, and an adjustment guide for suppressing lateral displacement of the aeration apron is provided for the suction pipe and the wrapping member. Fiber bundle concentrator of the spinning machine, characterized in that formed integrally with at least one of the. The apparatus of claim 1, wherein the adjusting guide is formed on the wrapping member. According to claim 1 or 2, wherein the one of the suction pipe and the wrapping member, the control guide is formed is extruded to have a stepped portion, the height of the portion where the control guide is to be formed is raised, the control guide is the aeration apron Fiber bundle focusing apparatus of the radiator, characterized in that formed by removing a portion of the stepped portion to fit the width of. 3. A fiber bundle focusing apparatus for a spinning machine according to claim 1 or 2, wherein said wrapping member is formed of a bar-shaped solid member. 3. The fiber bundle focusing apparatus according to claim 1 or 2, wherein the wrapping member is formed of a bar tubular member. Ring spinning frame provided with a fiber bundle focusing device according to claim 1.