JP2007126798A - Device for bundling fiber strand in spinning machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for bundling fiber strands in a spinning machine which is designed to control nipping/sticking of spun fibers to a crossing part of yarns composing a porous belt, improve the spinning properties and improve the durability of a porous belt without deteriorating the bundling/transferring function of the fiber strands. <P>SOLUTION: The device for bundling the fiber strands is equipped with a nip roller pair 16 on the downstream side of the final delivering roller pair 13 of a drafting apparatus 12. Furthermore, the device is provided with a suction part 17 having guide surfaces 29b and 30b provided with suction holes 29a and 30a on both sides in the moving direction of the fiber strands F sandwiching the nipping point of the nip roller pair 16 and a porous belt 18 rotated while sliding on the guide surfaces 29b and 30b. The porous belt 18 is formed of a woven fabric composed so that heat fused yarns 34 have the crossing parts 35. Furthermore, the crossing parts 35 are partially fused so that fused regions 37 adjacent to the fused crossing parts 35 and a non-fused region 38 adjacent to the non-fused crossing parts 35 are alternately present in the longitudinal direction of the porous belt 18. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fiber bundle converging device in a spinning machine, and more particularly to a fiber bundle converging device that is arranged downstream of a draft device (draft part) of a spinning machine and converges the fiber bundle drafted by the draft device. .

  Various fiber bundle concentrating devices have been proposed in which the drafted fiber bundle is preliminarily converged before twisting to improve yarn quality such as reduction of fluff. An endless perforated belt is used for focusing and transferring the fiber bundle, which is a basic function. The perforated belt is formed of a woven fabric using a polyamide multifilament yarn.

Moreover, using a nonwoven fabric sheet is proposed as a conveyance belt (perforated belt) used with a fiber bundle focusing apparatus (for example, refer patent document 1). As shown in FIG. 6, this nonwoven fabric sheet is obtained by superposing warp yarns (warp yarns) 51 and weft yarns (weft yarns) 52 made of thermoplastic filaments, and then subjecting them to a heat-melting treatment to obtain an intersection portion of both yarns. The lattice-like region 53 is formed by the warp yarn 51 and the weft yarn 52 by welding and fixing to each other.
JP 2004-346472 A (paragraph numbers [0021] to [0023], FIGS. 1 and 3)

  However, when an endless perforated belt is formed of a woven fabric, if the yarn of the fabric forming the perforated belt is cut or frayed at the end of the perforated belt during spinning, the end of the cut yarn or the frayed yarn Is entangled in the fiber bundle being spun, has an adverse effect on fiber convergence, and may cause yarn breakage and poor yarn quality. Moreover, when fraying starts, there is a possibility that the perforated belt may reach an unusable state at an early stage.

  In the conveyance belt of Patent Document 1, the warp 51 and the weft 52 are welded and fixed to each other at all the intersections by superposing the warp 51 and the weft 52 and performing a heat treatment. Therefore, even if the warp yarn 51 or the weft yarn 52 constituting the conveyance belt (perforated belt) is cut, the cut yarn end is prevented from being entangled with the fiber bundle to be spun. Moreover, even if fraying occurs, the fraying is suppressed from increasing.

  However, in the configuration in which the warp yarns 51 and the weft yarns 52 constituting the conveyor belt are welded and fixed to each other at all the intersections as in the conveyor belt of Patent Document 1, the flexibility of the conveyor belt is reduced. As a result, it becomes difficult for the transport belt to smoothly move in a state in which it is familiar with the outer shape of the guide portion of the fiber bundle concentrator.

  The present invention has been made in view of the above problems, and its purpose is to sandwich the spun fiber at the intersection of the yarns constituting the perforated belt without reducing the function of converging and transporting the fiber bundle. An object of the present invention is to provide a fiber bundle concentrating device in a spinning machine capable of suppressing the adhesion and improving the spinning property and improving the durability of the porous belt.

  In order to achieve the above-mentioned object, the invention according to claim 1 is a fiber bundle concentrating device in a spinning machine for converging fiber bundles drafted by a draft part. A guide part provided downstream of the final delivery roller pair of the draft part and provided with a nip roller; and a guide provided with a suction hole at least upstream in the moving direction of the fiber bundle across the nip point of the delivery part. A suction part having a surface; and a perforated belt rotated in a state of sliding on the guide surface. The perforated belt is formed of a sheet-like body configured such that yarns have crossing portions such as woven fabrics and knitted fabrics, and a fusion region where the fused crossing portions are adjacent to each other, and a crossing portion that is not fused. The intersections are partially fused such that adjacent non-fused regions are alternately present at least in the longitudinal direction of the perforated belt.

  Here, the “sheet-like body” means a yarn layer composed of yarns arranged in one direction in addition to a woven fabric or a knitted fabric woven in plain weave, twill weave, etc. Also includes two layers stacked and fused at the intersection of each yarn. In addition, the “fused region” includes not only the fused adjacent intersecting portion but also the opening corresponding to the intersected portion in the region, and the “non-fused region” refers to the adjacent unjoined intersecting portion. In addition, the region includes an opening corresponding to the intersection.

  The fiber bundle drafted by the draft part passes through the delivery part as the perforated belt rotates. At that time, the suction action of the suction hole acts on the fiber bundle through the perforated belt, and the fiber bundle is focused at a position corresponding to the suction hole. When the perforated belt is formed of a sheet-like body that has not been subjected to a fusion treatment at the intersection of the yarns, when the yarn constituting the sheet-like body is cut, the yarn end is entangled with the fiber bundle to be spun, etc. As a result, yarn breakage or poor yarn quality may be caused, or the fibers of the fiber bundle being spun may be sandwiched between the intersections of the yarns constituting the sheet-like body, thereby adversely affecting the spinning.

  However, in the perforated belt of the present invention, the intersecting portions of the yarns constituting the sheet-like body are partially fused, and the fused portions where the fused intersecting portions are adjacent to each other and the non-fused intersecting portions are adjacent. The fused regions are alternately present at least in the longitudinal direction of the perforated belt. Therefore, even if the yarn constituting the sheet-like body is cut, the cut yarn end is prevented from being entangled with the fiber bundle to be spun, and the fiber of the fiber bundle being spun is caught between the yarn intersections. Is also suppressed, and the durability of the perforated belt is improved. Also, unlike the case where all the intersections are fused, the flexibility of the perforated belt is ensured, and the perforated belt moves smoothly in a state in which it conforms to the outer shape of the guide part of the fiber bundle focusing device. It is avoided that the focusing / transfer function is degraded.

  According to a second aspect of the present invention, in the first aspect of the present invention, the fused region and the non-fused region are provided alternately in the width direction of the perforated belt. In this invention, the flexibility in the width direction of the perforated belt is also improved.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the ratio of the total area of the fusion region to the total area of the perforated belt is 50 to 95%. Therefore, in this invention, the flexibility of the perforated belt is ensured and the durability is improved.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the yarn constituting the perforated belt is made of polyamide. Therefore, in the present invention, the necessary strength can be ensured even if the thickness of the thread is about 0.1 mm in order to make the perforated belt thin. Polyamide has good compatibility with cotton and can be spun smoothly.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the perforated belt has an area ratio of a fusion region on the end side in the width direction on the center side. It is formed to be higher than the area ratio of the fusion region. Here, “the end side in the width direction” means a range of ¼ to ３ from the end in the width direction, and the center side means the remaining range of ½ to ３. To do. Further, the “area ratio of the fusion region” means the ratio of the area of the fusion region to the total of the area of the fusion region and the area of the non-fusion region. In this invention, when the ratio of the fusion region as the whole perforated belt is the same, the suction effect on the fiber bundle is better than when the fusion region is distributed almost uniformly throughout the perforated belt.

  According to the present invention, the spinning property is improved by suppressing the pinching / attachment of the spinning fiber to the intersecting portion of the yarn constituting the perforated belt without reducing the function of converging / transporting the fiber bundle. The durability of the belt can be improved.

(First embodiment)
Hereinafter, an embodiment in which the present invention is embodied in a fiber bundle concentrating device equipped in a spinning machine will be described with reference to FIGS.

  The fiber bundle focusing device has basically the same configuration as the fiber bundle focusing device (Japanese Patent Laid-Open No. 2003-113450) filed by the present applicant. As shown in FIG. 1A, the fiber bundle focusing device 11 is provided on the downstream side of the final delivery roller pair 13 of the draft device 12 as a draft part. The final delivery roller pair 13 includes a front bottom roller 14 and a front top roller 15.

  The fiber bundle focusing device 11 includes a nip roller pair 16 as a delivery unit, a suction unit 17 and a perforated belt 18. The nip roller pair 16 includes a bottom nip roller 19a as a driving roller portion formed on a rotating shaft 19 disposed in parallel with the front bottom roller 14, and a top nip roller 20 pressed against the bottom nip roller 19a via a perforated belt 18. It is configured. Similarly to the front top roller 15 of the draft device 12, the top nip roller 20 is supported by a weighting arm (not shown) via a support member 21 every two spindles. The support member 21 is formed integrally with the support member of the front top roller 15.

  On the other hand, as shown in FIG. 2, the bottom side of the fiber bundle concentrating device 11 is configured as a unit of half of the weights arranged between the roller stands 22 of the draft device 12, that is, four weights in this embodiment. . At a middle position of the roller stand 22 arranged at a predetermined interval in the machine longitudinal direction, a support beam (not shown) extending in the machine longitudinal direction on the rear side from the back bottom roller (not shown) is provided. The support arm 23 is disposed in a state where the base end side is supported, and the rotary shaft 19 is supported between the roller stand 22 and the support arm 23.

  The rotary shaft 19 is formed in a predetermined length corresponding to a plurality of weights (four weights in this embodiment), and bearings (not shown) fixed at both ends thereof are fitted to the end plugs 25. The end plug 25 is supported by the support portions 22a and 23a provided on the roller stand 22 and the support arm 23 in the fitting portion 25a, so that the rotating shaft 19 rotates between the roller stand 22 and the support arm 23. Supported as possible. The support portions 22 a and 23 a are formed so as to be able to support two end plugs 25, and can support the end plugs 25 attached to the end portions of the adjacent rotary shafts 19.

  The rotary shaft 19 is provided with a gear 26 at the center in the longitudinal direction as a rotational force transmitting portion for transmitting the rotational force of the drive source. The gear 26 is formed integrally with the rotary shaft 19. In this embodiment, a front bottom roller 14 is used as a drive source for the rotary shaft 19, and a gear portion 14 a (shown in FIG. 1A) is formed on the front bottom roller 14 at a position facing the gear 26. Similarly to the support arm 23, an intermediate gear 28 is rotatably supported by a support arm 27 whose base end is fixed to a support beam. The intermediate gear 28 meshes with the gear portion 14a and the gear 26. That is, the rotational force of the front bottom roller 14 is transmitted to the rotary shaft 19 through the gear portion 14a, the intermediate gear 28, and the gear 26.

  The spinning machine base is provided with a suction duct (not shown) so as to extend in the longitudinal direction (perpendicular to the paper surface of FIG. 1A). The suction part 17 includes suction pipes 29 and 30 extending in parallel with the rotary shaft 19 and a connection pipe 31 that is connected to the suction duct and applies a negative pressure to the suction pipes 29 and 30. The connecting pipe 31 is disposed on the front side of the gear 26 so that a part of the connecting pipe 31 serves as a cover for the gear 26 and the intermediate gear 28, and is connected to the suction duct via the bellows-like connecting pipe 32 on the base end side. . The suction pipes 29 and 30 have first ends fitted into fitting holes formed on both the left and right sides of the tip of the connection pipe 31, and a second end fitted to the end plug 25.

  As shown in FIGS. 1A and 2, the suction pipe 29 has a guide surface formed with a suction hole 29 a extending upstream in the moving direction of the fiber bundle (fleece) F across the nip point of the nip roller pair 16. 29b. The suction pipe 30 has a guide surface 30b in which a suction hole 30a extending downstream is formed. The suction pipe 29 is disposed upstream of the nip point of the bottom nip roller 19a in the moving direction of the fiber bundle F, and the suction pipe 30 is disposed downstream.

  As shown in FIG. 1 (a), near the lower portion of the suction pipe 30, there is a tip of a suction nozzle 33 of a single type pneumatic device that serves to suck the fiber bundle F fed from the draft device 12 when the yarn breaks. Each is arranged. The proximal end of the suction nozzle 33 is connected to a suction duct (not shown).

  As shown in FIG. 1A, the perforated belt 18 is partially wound around the suction pipes 29 and 30 and partially contacted with the bottom nip roller 19a, and the guide surface 29b is rotated along with the rotation of the bottom nip roller 19a. , 30b, and is rotated while sliding.

  The perforated belt 18 is formed of a plain woven fabric in a seamless loop shape. In this embodiment, the woven fabric woven in a cylindrical shape is subjected to a fusion treatment and then cut into a predetermined width. As shown in FIG. 1 (d), a core-sheath heat fusion yarn 34 is used as a yarn constituting the woven fabric. And the heat-seal | fusing thread | yarn 34 has the sheath part 34a melt | fused by the cross | intersection part 35 of the thread | yarn which comprises a textile fabric. In this embodiment, the core part 34b and the sheath part 34a are each made of polyamide, and the core part 34b is made of polyamide having a melting point of 260 ° C, and the sheath part 34a is made of polyamide having a melting point of 220 ° C. in use. Moreover, in this embodiment, the core part 34b is comprised with the monofilament.

  The woven fabric is woven with heat-sealing yarns 34 having a diameter (thickness) of 0.05 to 0.15 mm. The thinner the yarn, the better the suction action on the fiber bundle F being spun, but the strength of the perforated belt 18 becomes insufficient, so the thickness in the above range is preferred. The aperture ratio is 25 to 40%. Here, as shown in FIG. 1E, the aperture ratio refers to the area of the portion surrounded by the center line (shown by broken lines) of two adjacent warps 36a and two wefts 36b as A1, 2 When the area of the hatched portion (opening) surrounded by the warp yarn 36a and the two weft yarns 36b is A2, it is defined as (A2 / A1) × 100 (%).

  The perforated belt 18 is not fused at all the crossing portions 35 of the yarn constituting the woven fabric, but a fusion region 37 adjacent to the fused crossing portion 35 and an intersection portion 35 that is not fused are adjacent to each other. The intersecting portions 35 are partially fused so that the non-fused regions 38 alternately exist at least in the longitudinal direction of the perforated belt 18. In this embodiment, the fusion regions 37 and the non-fusion regions 38 are provided so as to alternately exist in the width direction of the porous belt 18. More specifically, as shown in FIG. 1 (c), the perforated belt 18 that has not been subjected to the fusing process is a uniform cylindrical fabric, but the perforated belt 18 that has been subjected to the fusing process is similar to FIG. As shown in (b), the circular fused region 37 is formed so as to be distributed almost uniformly throughout the perforated belt 18, and the remaining region becomes the non-fused region 38. In FIG. 1 (b), the warp yarn 36a and the weft yarn 36b are not shown.

  When the intersecting portion 35 is fused, the heat fusion yarn 34 is melted also in the vicinity of the intersecting portion 35, so that the aperture ratio in the fused region 37 is lower than the aperture ratio in the non-fused region 38. The fused region 37 and the non-fused region 38 are different in appearance, and the fused region 37 appears to be distinguished from the non-fused region 38 as shown in FIG.

The fusion area ratio, which is the ratio of the total area of the fusion area 37 to the total area of the perforated belt 18, that is, the sum of the total area of the fusion area 37 and the total area of the non-fusion area 38 is 50 to 95%. Is preferable, and 70 to 90% is more preferable. When the fusion area ratio is less than 50%, the durability of the porous belt 18 tends to be insufficient, and when the fusion area ratio exceeds 95%, the flexibility of the porous belt 18 tends to be insufficient. Further, the size of one fusion region 37 depends on the width of the porous belt 18, but when the fusion region 37 is circular, the diameter is preferably less than half the width of the porous belt 18. 100mm ² or less is preferable.

  Next, a method for manufacturing the perforated belt 18 will be described. Since it is low in productivity that the perforated belt 18 is formed from the beginning to the width of the final product and then subjected to the fusion treatment, first, the length is several times (for example, several tens of times) the width of the final product. Prepare a cylindrical fabric. Since the width of the porous belt 18 is about 15 to 25 mm, a cylindrical fabric having a length of several hundred mm is prepared. Then, as shown in FIG. 3, the fusion processing is performed using an apparatus including a fusion processing unit 40 in which a plurality of holes 40 b are formed in a cylindrical body 40 a having an outer shape substantially the same as the inner diameter of the cylindrical fabric 39. The cylindrical body 40 a is formed longer than the cylindrical fabric 39, and a hole 40 b is formed in a range longer than the length of the cylindrical fabric 39. The holes 40 b have a size corresponding to the fusion region 37 of the perforated belt 18 and are formed at positions corresponding to the distribution state of the fusion region 37.

  A high-temperature gas (for example, air) that can melt the sheath portion 34a of the thermal fusion yarn 34 is supplied into the cylindrical body 40a in a state in which the cylindrical fabric 39 is externally fitted to the cylindrical body 40a of the fusion processing unit 40. The high-temperature gas supplied into the cylindrical body 40a is blown out of the cylindrical body 40a through the hole 40b. And the sheath part 34a is melt | fused in the cross | intersection part 35 of the heat sealing | fusion thread 34 in the area | region of the part corresponding to the hole 40b of the cylindrical fabric 39, and the melt | fusion area | region 37 is formed. After supplying the high-temperature gas to the cylindrical body 40a for a predetermined time, the cylindrical body 40a is cooled. After cooling, the cylindrical fabric 39 is removed from the cylindrical body 40a. Thereafter, the perforated belt 18 is completed by cutting the cylindrical fabric 39 into a predetermined width.

By changing the size, number, and distribution state of the holes 40b formed in the cylindrical body 40a, the perforated belt 18 in which the fusion region 37 is formed in a desired state can be manufactured.
Next, the operation of the fiber bundle focusing device 11 configured as described above will be described.

  When the spinning machine is operated, the fiber bundle F is drafted by the draft device 12 and then guided from the final delivery roller pair 13 to the fiber bundle converging device 11. The nip roller pair 16 is rotated slightly faster than the surface speed of the final delivery roller pair 13, and the fiber bundle F passes the nip point of the nip roller pair 16 in a moderate tension state, and then turns and moves downstream while being twisted. To do.

  Further, the suction action of the duct extends to the suction pipes 29 and 30 via the connection pipe 31, and the suction action of the suction holes 29 a and 30 a formed in the guide surfaces 29 b and 30 b reaches the fiber bundle F via the perforated belt 18. . Then, the fiber bundle F moves in a state where the fiber bundle F is sucked and focused at a position corresponding to the suction holes 29a and 30a. Therefore, as compared with a spinning machine not equipped with the fiber bundle concentrating device 11, the generation of fluff and cotton falling are suppressed and the yarn quality is improved.

This embodiment has the following effects.
(1) The perforated belt 18 rotated in contact with the guide surfaces 29b and 30b of the suction pipes 29 and 30 constituting the fiber bundle concentrating device 11 is a yarn constituting a woven fabric which is a sheet-like body as the material ( The heat fusion yarn 34) is partially fused at the intersection 35. Therefore, even when the yarn constituting the fabric is cut, the cut yarn end is prevented from being entangled with the fiber bundle F to be spun, and the fibers of the fiber bundle F being spun are caught between the yarn intersections 35. This is also suppressed. As a result, a decrease in the function of converging / transferring the fiber bundle F is suppressed, and the spinning property is improved by suppressing the pinching / attachment of the spun fibers to the crossing portion 35 of the yarn constituting the perforated belt 18. Can do.

  (2) A structure in which the fusion regions 37 adjacent to the fused intersections 35 and the non-fusion regions 38 adjacent to the intersections 35 that are not fused alternately exist at least in the longitudinal direction of the porous belt 18. Has been. Therefore, unlike the perforated belt in which all the intersecting portions 35 are fused, the flexibility of the perforated belt 18 is ensured, and the perforated belt 18 is the outer shape of the suction pipes 29 and 30 that are the guide portions of the fiber bundle concentrating device 11. Since it moves smoothly in a state familiar with (guide surfaces 29b, 30b), it is possible to avoid a decrease in the function of converging / transferring the fiber bundle F.

  (3) Since the fusion region 37 and the non-fusion region 38 are provided alternately in the width direction of the porous belt 18, the flexibility in the width direction of the porous belt 18 is also improved.

  (4) The ratio of the total area of the fusion region 37 to the total area of the porous belt 18 is 50 to 95%. Therefore, the flexibility of the perforated belt 18 is ensured and the durability is improved. Further, if the ratio is 70 to 90%, it is more preferable in terms of the flexibility and durability of the porous belt 18.

  (5) The yarn constituting the perforated belt 18 is made of polyamide. Accordingly, the required strength can be ensured even if the thickness of the thread is about 0.1 mm in order to make the perforated belt 18 thin. Polyamide has good compatibility with cotton and can be spun smoothly.

  (6) A heat-sealing yarn 34 having a core-sheath configuration is used as a yarn constituting a woven fabric (sheet-like body) as a material of the porous belt 18. Therefore, the yarn constituting the woven fabric can be easily fused at the intersection 35.

  (7) Since the fabric of the perforated belt 18 uses the heat fusion yarn 34 for both the warp yarn 36a and the weft yarn 36b, compared to the case where only one is the heat fusion yarn 34, the intersection of the yarns 35 can be easily fused.

(8) Since the perforated belt 18 is woven with small threads of about 0.1 mm, the suction action for the fiber bundle F is efficiently performed.
(9) Since the perforated belt 18 is formed in a seamless loop shape, the fiber bundle F can be smoothly transferred, and it can be prevented that fatigue easily proceeds from the joint.

(10) Since the woven fabric forming the perforated belt 18 is woven with filament yarns, the strength is higher than that of staple yarns at the same thickness, and air permeability is improved.
(11) As a fusing method necessary for manufacturing the perforated belt 18, a method of blowing high temperature gas from the hole 40b in a state where the cylindrical fabric 39 is fitted on the cylindrical body 40a in which the hole 40b is formed is adopted. . Therefore, by using the cylindrical body 40a in which the holes 40b are formed in a state corresponding to the size and distribution of the fusion region 37 to be formed, the perforated belt 18 having the desired fusion region 37 can be easily produced. It can be manufactured in a state with high properties.

The embodiment is not limited to the above, and may be configured as follows, for example.
The porous belt 18 is not limited to a configuration in which the fusion region 37 is uniformly distributed throughout the porous belt 18, but the area ratio of the fusion region 37 on the end side in the width direction is the fusion region on the center side. You may form so that it may become higher than the area ratio of 37. Here, “the end side in the width direction” means a range of ¼ to ３ from the end in the width direction, and the center side means the remaining range of ½ to ３. To do. Further, the “area ratio of the fusion region 37” means the ratio of the area of the fusion region 37 to the sum of the area of the fusion region 37 and the area of the non-fusion region 38. As a method of increasing the area ratio of the fusion region 37 on the end side, there are a method of changing the density of the fusion region 37 having the same size, and a method of forming the fusion region 37 having different sizes and changing the density. . When the area ratio of the fusion region 37 on the center side decreases, the aperture ratio increases. Therefore, when the ratio of the fusion region 37 as the entire porous belt 18 is the same, the fusion region 37 substantially covers the entire porous belt 18. Compared to the case of uniform distribution, the suction action on the fiber bundle F is improved.

  ○ In the configuration in which the fusion region 37 having a different size is provided on the end side and the center side, and the area ratio on the end side is increased, for example, on the end side as shown in FIG. A configuration in which a fusion area 37 having a large area is formed and a fusion area 37 having a small area is formed on the center side is preferable. In this case, the suction action from the suction holes 29a and 30a is likely to act uniformly on the fiber bundle F.

O You may arrange | position so that the number of the fusion | melting area | regions 37 arrange | positioned in the width direction of the perforated belt 18 may become the same in each row | line | column. Moreover, you may arrange | position so that the fusion | melting area | regions 37 from which a magnitude | size differs may be mixed.
The shape of the fused region 37 is not limited to a circle, and may be changed as appropriate, such as a polygon such as a triangle or a rectangle, or an ellipse.

  As shown in FIG. 4 (b), fusion regions 37 that extend intermittently along the circumferential direction may be formed at both ends of the perforated belt 18. In this case, the presence of the non-fusion region 38 between the fusion regions 37 ensures the flexibility of the porous belt 18 and makes the end of the porous belt 18 more difficult to fray.

  (Circle) the fusion process of the cross | intersection part 35 at the time of manufacturing the perforated belt 18 is not restricted to the method of using the high temperature gas which blows off from the hole 40b of the cylindrical body 40a. For example, a method is adopted in which the cylindrical fabric 39 is fitted on the roller and the roller is rotated while another roller having a convex portion formed in the shape of the fusion region 37 is pressed against the cylindrical fabric 39. May be. However, the method using a high-temperature gas is easier.

A fusion treatment may be performed on the cylindrical fabric 39 formed in the width of the porous belt 18 in the final product.
The perforated belt 18 is not limited to a plain woven fabric, and may be a woven fabric such as a twill weave.

  The perforated belt 18 is not limited to a woven fabric, but may be a knitted fabric. In this case, due to the stretchability of the knitted fabric, the perforated belt 18 is rotated in an appropriate tension state without any tension device.

  The perforated belt 18 is not limited to a woven fabric or a knitted fabric, and a non-woven fabric disclosed in Patent Document 1 includes a yarn layer composed of yarns arranged in one direction (thermal fusion yarns 34) in the arrangement direction of the thermal fusion yarns 34. May be formed of a sheet-like body in which two layers are laminated in a state where the crossing is (for example, an orthogonal state) and the crossing portion 35 of each heat-sealing yarn 34 is partially fused.

  The perforated belt 18 is not limited to a seamless loop shape formed of endless woven or knitted fabric or knitting, but may be a loop shape with a seam where both ends of a belt-shaped woven fabric or knitted fabric are fixed. Good.

The woven fabric forming the perforated belt 18 may be composed of only the warp yarns or only the weft yarns of the heat fusion yarns, instead of constituting all the yarns of the heat fusion yarns.
○ The heat-sealing yarn 34 is not limited to one in which both the sheath portion 34a and the core portion 34b are made of polyamide. For example, the sheath 34a and the core 34b may be made of polyester, the sheath 34a may be made of polyester, and the core 34b may be made of polyamide.

The perforated belt 18 may have an antistatic function.
○ The rotary shaft 19 and the suction pipes 29 and 30 are not limited to a configuration in which four spindles are set as one unit, but a configuration in which the number of spindles between the roller stands 22 (for example, eight spindles) is set as one unit or two spindles are set as one unit. Also good. In addition, the number of weights between the roller stands 22 may be divided into different numbers (for example, 6 weights and 2 weights) without necessarily setting all units to the same number of weights, and two types of units may be provided correspondingly.

  ○ Not only a configuration in which the suction holes 29a and 30a are provided on the upstream side and the downstream side across the nip point of the fiber bundle F, but a configuration having the suction pipe 29 provided with the suction hole 29a only on the upstream side across the nip point Also good. In that case, if a pipe or bar having the same outer shape as the suction pipe 30 and not forming the suction hole 30a is used instead of the suction pipe 30, the manufacturing method and assembly can be made substantially the same as in the above embodiment. Alternatively, the suction pipe 30 may be eliminated and the perforated belt 18 may be wound around the suction pipe 29 and the bottom nip roller 19a.

  The delivery unit of the fiber bundle concentrating device 11 is not limited to the configuration equipped with the nip roller pair 16. For example, as shown in FIG. 5, a suction pipe 44 having a substantially oval cross section is provided, and a suction hole 44 a is formed at a predetermined position of the suction pipe 44. Then, the perforated belt 18 is slidably wound around the outer periphery of the suction pipe 44 and the tension roller 45. Alternatively, the perforated belt 18 may be driven by transmitting the rotation of the front top roller 15 to the top nip roller 20 via the gear 46 and driving the top nip roller 20 while being pressed against the perforated belt 18.

  As a configuration in which the rotating shaft 19 on which the bottom nip roller 19a is formed is a shaft common to all spindles, and is driven by a motor through a gear train provided at the gear end of the machine base in the same manner as the front bottom roller 14 of the draft device 12. Also good.

O It is good also as a structure which provides the perforated belt 18 in the top side.
○ The present invention may be applied not only to the drafting device of a spinning machine but also to the drafting device of another spinning machine.
The invention (technical idea) grasped from the embodiment will be described below.

  (1) A sheet-like body that is formed in a cylindrical shape so that the yarn has an intersecting portion like a woven fabric or a knitted fabric is formed by heat-sealing yarn, and the sheet-like body is closed at one end and a plurality of A gas having a temperature equal to or higher than the melting point of the heat-sealing yarn is supplied to the cylindrical body in a state of being externally fitted to the cylindrical body having holes, and is blown out of the holes to fuse the intersecting portions corresponding to the holes. A method for producing a perforated belt.

  (2) In the invention described in the technical idea (1), the sheet-like body has a length corresponding to a plurality of perforated belts, and is formed into a predetermined size after the fusion process of the intersecting portion is completed. The perforated belt is formed by cutting.

(3) The perforated belt according to any one of claims 1 to 5.
(4) A ring spinning machine including the fiber bundle focusing device according to any one of claims 1 to 5.

(A) is a partially broken schematic side view of the fiber bundle concentrating device of one embodiment, (b) is a schematic perspective view of a perforated belt subjected to a fusion treatment, and (c) is not subjected to a fusion treatment. A schematic perspective view of a perforated belt, (d) is a schematic diagram of the intersection part of the thread | yarn in a perforated belt, (e) is a schematic diagram for demonstrating an aperture ratio. The partial schematic which shows the relationship between a suction part and a bottom nip roller. The model perspective view explaining the fusion | melting method of a perforated belt. (A), (b) is a partial schematic diagram which shows the structure of the porous belt in another embodiment. The schematic side view which shows the fiber bundle focusing apparatus of another embodiment. The partial schematic perspective view of the conveyance belt of a prior art.

Explanation of symbols

  F ... Fiber bundle, 11 ... Fiber bundle concentrator, 12 ... Draft device as draft part, 13 ... Final delivery roller pair, 16 ... Nip roller pair as delivery part, 17 ... Suction part, 18 ... Perforated belt, 29a, 30a , 44a ... suction holes, 29b, 30b ... guide surfaces, 34 ... heat fusion yarns, 35 ... crossovers, 37 ... fusion regions, 38 ... non-fusion regions.

Claims (5)

A fiber bundle concentrator in a spinning machine for converging fiber bundles drafted by a draft part,
A feeding portion provided downstream of the final delivery roller pair of the draft part and provided with a nip roller; and a guide surface provided with a suction hole at least upstream in the moving direction of the fiber bundle across the nip point of the delivery portion. And a perforated belt that is rotated while sliding on the guide surface, and the perforated belt is formed of a sheet-like body configured such that the yarn has an intersecting portion like a woven fabric or a knitted fabric. And the fused portions where the fused intersections are adjacent to each other and the non-fused regions where the non-fused intersections are adjacent are alternately present at least in the longitudinal direction of the perforated belt. Fiber bundle concentrating device in a spinning machine.   The fiber bundle concentrating device in a spinning machine according to claim 1, wherein the fusion region and the non-fusion region are provided so as to alternately exist in the width direction of the perforated belt.   The fiber bundle concentrating device in a spinning machine according to claim 1 or 2, wherein a ratio of a total area of the fusion region to a total area of the perforated belt is 50 to 95%.   The fiber bundle concentrating device in a spinning machine according to any one of claims 1 to 3, wherein the yarn constituting the perforated belt is made of polyamide.   The said perforated belt is formed so that the area ratio of the fusion | melting area | region of the edge part side in a width direction may become higher than the area ratio of the fusion | fusion area | region of the center part side. The fiber bundle concentrating device in the spinning machine described in 1.

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