WO2002084000A1

WO2002084000A1 - Fascicle tying device

Info

Publication number: WO2002084000A1
Application number: PCT/JP2002/002696
Authority: WO
Inventors: Tsutomu Nakano
Original assignee: Kabushiki Kaisha Toyota Jidoshokki
Priority date: 2001-04-11
Filing date: 2002-03-20
Publication date: 2002-10-24
Also published as: JP2005023430A

Abstract

A fascicle tying device (12) disposed on the downstream side of a pair of final delivery rollers of a draft device and capable of exerting a suckingly tying action also on a fascicle passed through a nip point to increase the quality of yarn, comprising a pair of nip rollers (13), a sucking part (14), and a multi-aperture apron (15), the sucking part (14) further comprising tube parts (20) having sliding guide surfaces (19) with sucking slits (19a) extending to the upstream side of the fascicle (F) in moving direction through the nip point of the bottom nip roller (13a) and sucking slits (19b) extending to the downstream side thereof, wherein the top nip roller (13b) is pressed against the bottom nip roller (13a) through the multi-aperture apron (15), and the tube part (20) is formed in the state of being divided into an upstream side portion (20a) having the sucking slits (19a) formed therein and a downstream side portion (20b) having the sucking slits (19b) formed thereon.

Description

Mei Cao Cao

TECHNICAL FIELD The present invention relates to a fiber bundle concentrating device, and more specifically, for example, a fiber bundle concentrating device that is disposed downstream of a draft device (draft part) of a spinning machine and collects a fiber bundle drafted by the draft device. It is about. BACKGROUND ART As a fiber bundle concentrating device of this type, Japanese Patent Application Laid-Open No. 7-238384 discloses a porous apron that forms a fiber bundle conveying surface downstream of a final roller pair that constitutes a draft device. There is disclosed an apparatus provided with a pair of delivery rollers described above and an air suction device for applying a suction airflow to a conveying surface of the porous apron. In this device, the suction airflow acts on the transport surface of the porous apron via the slot formed in the apron cage that guides the porous apron.

In addition, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 11-2866863, as shown in FIG. 7, a suction slit 5 is provided on the bottom side downstream of the final rollers 51, 52 of the drafting apparatus. A guide cylinder 53 constituting a stationary sliding guide surface having 3a is provided, and a guide belt 54 for transport is wound around the guide cylinder 53. In addition, a nip roller 55 is provided on the top side to abut on the perforating pedestal 54 to define a nip point. The nip roller 55 is driven by a final roller 52 via a transfer belt 56. Instead of driving the nip roller 55 via the transfer belt 56, a configuration in which the nip roller 55 is driven via a transfer roller in contact with the final roller 52 is also proposed.

As shown in FIG. 8, in Japanese Patent Application Laid-Open No. 2-118187, a suction area 57 a of approximately 90 ° is provided on the bottom side of the final roller of the draft device, and the suction area 57 a is provided. A configuration in which outlet rollers 58 and 59 are provided at both ends of a is disclosed. Suction area 5 7 “a” is provided on a large-diameter guide roll 57, and a perforated cylinder 60 is rotatably provided outside the guide roll 57. The outlet rollers 58, 59 are pressed by the perforated cylinder 60, and nip the fiber bundle 61 at both ends of the suction area 57a.

In the apparatus disclosed in Japanese Patent Application Laid-Open No. 7-238384, the suction of the fiber bundle has to be terminated at a position far away from the nib point of the outlet-roller pair, and the fiber bundle once bundled Is likely to spread again before reaching the nip point. Therefore, the convergence is insufficient and a so-called free triangle is formed at the exit of the delivery roller, and the effect of improving the yarn quality is low.

In the apparatus disclosed in Japanese Patent Application Laid-Open No. 7-238384, the effect of condensing fiber bundles can be achieved by using the apparatus disclosed in Japanese Patent Application Laid-Open No. Hei 7-238384 because slit suction can be realized up to the nip point. It is improved in comparison. However, the effect of improving yarn quality is low due to the existence of a free triangle. In addition, the perforated belt 54 is pressed by the nip roller at the nip point, and slides around the guide cylinder 53 in a stationary state, causing relative slippage. There is a problem that the vicinity of the nip point is easily worn. Further, since the nip roller 55 is driven from the final roller 52 via a transmission means (such as a transfer belt 56), it is difficult to adjust the peripheral speed ratio between the final roller 52 and the nip roller 55. Further, since the peripheral speed ratio is determined by the diameter ratio of the rubber top roller, it changes when the diameter ratio changes due to the wear of the roller, and thus there is a problem that management is difficult.

Further, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 2-118187, the peripheral speed of the two exit rollers 58, 59 is the same, so that the fiber bundle 61 is not appropriately tensioned, and the yarn quality is improved. Is negative in terms of There is also a problem that it is difficult to manufacture the perforated cylinder 60 and the fly waste is easily clogged.

Further, as shown in FIG. 9, it has been known that fluff is likely to occur when a so-called free triangle 63 occurs after passing through a nip point of a delivery roller (dip roller) 62 as shown in FIG. However, no explanation was given on the mechanism of its occurrence. As a result of studying the mechanism, the inventor of the present application found that when a free triangle 63 was generated, the constituent fibers 64 released from both ends of the bundled fiber bundle 61 were not completely twisted into the core fiber at the time of twisting. As a result, fluff or lint ( (Decrease in material utilization). In any of the above-mentioned conventional devices, since the suction action does not reach the fiber bundle in the region beyond the nip point, the generation of the free triangle 63 is inevitable, and the improvement of the yarn quality becomes insufficient. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to exert a suction-bundling effect even on a fiber bundle after passing through a nip point, thereby improving yarn quality. It is an object of the present invention to provide a fiber bundle concentrating device which can be used.

In order to achieve the above object, the invention according to claim 1 is a fiber bundle concentrator that bundles fiber bundles drafted in a draft part, wherein the fiber bundle concentrator is provided downstream of a final delivery roller pair of the draft part. A delivery portion provided with a nip portion, and a sliding guide surface provided with a suction slit extending upstream and downstream in the moving direction of the fiber bundle with the nip point of the delivery portion interposed therebetween. And a porous apron which constitutes the delivery section and is rotated in contact with the sliding guide surface, wherein the sliding guide surface has a fiber bundle with a fleece angle at which the fiber bundle sent out from the porous apron has a fleece angle. It is arranged to turn.

According to the present invention, the fiber bundle drafted in the draft part is sent out from a sending part provided downstream of the final sending roller pair of the draft part. The suction action is exerted on the fiber bundle via the porous apron from the suction slits arranged upstream and downstream of the fiber bundle in the moving direction of the fiber bundle across the nip point of the sending section. Then, the fiber bundle is moved to a position corresponding to the suction slit in a state of being collected by suction. In the conventional device, the suction slit is arranged only on the upstream side of the double point, so that the fiber bundle once bundled up to the double point spreads after passing the double point and the yarn The quality improvement effect is insufficient. However, in the present invention, the free bundle is hardly formed at the exit of the nip portion because the fiber bundle moves while being collected by the suction action even after passing the two nip points. As a result, the generation of fluff and cotton loss are suppressed, and the effect of improving the yarn quality is greatly improved. The fiber bundle that has passed through the final delivery roller of the draft part moves to the nip point under moderate tension, and after passing the nip point, turns and undergoes twisting. To the downstream side. The convergence effect of the suction slit provided downstream of the nip point propagates to some extent upstream of the nip point, and suppresses the spread of the fiber bundle until reaching the nip point.

In the invention according to claim 2, according to the invention according to claim 1, the nip portion includes a nip roller pair, and the porous apron is a part of the nip roller of the sliding guide surface and one of the nip roller pairs. It is wound around in contact with the part. In this invention, since the pressing of the nip roller at the nip point is applied to the nip roller opposed across the porous apron and the porous apron rotates, the relative sliding between the porous apron and the nip roller does not occur. Therefore, compared to a configuration in which the porous apron is not wound around the nip roller but is wound around the support cylinder in a stationary state, and the porous apron is rotated by the nip roller that rotates while pressing the porous apron against the support cylinder, the number of the support cylinder and the number of the apron are increased. Wear of the apron is suppressed.

According to a third aspect of the present invention, in the second aspect of the invention, the porous apron is rotated by a rotational force of the one nip roller.

According to a fourth aspect of the present invention, in the third aspect of the invention, the pair of nip rollers is a top nip roller and a bottom nip roller, and the rotational force is a rotational force of the bottom nip roller.

In the invention according to claim 5, in the invention according to claim 1, in the suction slit, a width of an upstream suction slit located on an upstream side of the nip point is located on a downstream side. The width of the suction slit on the downstream side is wider than that of the suction slit on the downstream side, and the width of the slit for suction on the downstream side is formed to be narrower toward the downstream side.

According to the present invention, the effect of suppressing the spread of the fiber bundle downstream of the nip point is enhanced, and the effect of improving the yarn quality is enhanced.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the suction slit is formed so as to extend obliquely with respect to a moving direction of the porous apron. In the present invention, the convergence is improved by the false twist effect.

According to a seventh aspect of the present invention, in the first aspect of the present invention, the suction unit includes a portion where an upstream suction slit is located upstream of the nip point and a downstream portion. To the part where the suction slit on the downstream side is formed. Is formed.

If the part where the suction slit on the upstream side is formed and the part where the slit for suction on the downstream side are formed in the body, the cotton and the apron are placed between the suction part and the porous apron. Although dust easily accumulates, according to the present invention, fly waste and dust are released from the open portion of the divided suction portion. Therefore, it is difficult for dust to collect between the back surface of the porous apron and the suction part.

According to an eighth aspect of the present invention, in the first aspect of the present invention, the suction unit is made of resin and formed in units of two weights. In the present invention, since it is made of resin, it is lighter in weight than the case of metal. In addition, the replacement work is easy because the two spindles are integrated. In a ninth aspect of the present invention, in the first aspect of the present invention, the suction unit is formed with a unit between the mouth and the stand as one unit. According to the present invention, the number of parts of the suction unit required for one spinning machine is reduced. In addition, the roller stands are generally arranged at intervals of the spring beads that constitute the frame frame of the spinning machine, and the suction ducts and the like are often configured by connecting ones having a length corresponding to the interval. Therefore, by making the suction portion also have a configuration corresponding to the length, packing or the like during transportation or the like is facilitated. In the invention according to claim 10, the invention according to claim 1, wherein Is formed of a woven fabric. According to the present invention, a porous apron can be manufactured at low cost by selecting a woven fabric that can ensure appropriate air permeability without taking the trouble of opening a small hole in a belt constituting the porous apron.

In the invention according to claim 11, in the invention according to claim 1, the porous eblon is formed of a knitted fabric. According to the present invention, the porous apron can be made inexpensive, and the elasticity of the knitted fabric allows the porous apron to be rotated in an appropriate tension state without particularly providing a tension device.

In the invention according to claim 12, in the invention according to claim 1, the suction unit is configured to be capable of adjusting a suction force. According to the present invention, even when spinning conditions such as fiber type and spinning speed are changed, the suction force of the suction unit can be adjusted to an appropriate suction force corresponding to the spinning conditions.

In the invention according to claim 13, in the invention according to claim 1, the suction unit is A part is shared with a pneumatic device that functions to suck the fleece sent out from the draft part when the yarn breaks. According to the present invention, the installation space for both devices can be reduced and the manufacturing cost can be reduced, as compared with the case where the suction section is provided completely independently of the pneumatic device performing the suction action. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of one embodiment,

FIG. 2A is a schematic diagram showing the relationship between the suction unit of the fiber bundle concentrator and the bottom nipplore, FIG. 2B is a schematic side sectional view of a main part,

Figure 3 is a partial schematic front view of the fiber bundle concentrator,

4A and 4B are schematic diagrams corresponding to FIG. 2A of another embodiment,

FIG. 5 is a schematic side sectional view of a main part of another embodiment,

6A is a partially omitted schematic diagram corresponding to FIG. 2A of another embodiment, FIG. 6B is a partially omitted schematic diagram corresponding to FIG.

Fig. 7 is a side sectional view of the conventional device,

FIG. 8 is a side sectional view of another conventional device, and

FIG. 9 is a schematic diagram showing a free triangle. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment in which the present invention is embodied in an apparatus equipped in a spinning machine in units of two spindles will be described with reference to FIGS. FIG. 1 is a schematic side view showing one side of the draft device, and FIG. 2B is an enlarged view of a main part.

As shown in FIG. 1, a draft device 1 as a draft part has a three-wire configuration including a front bottom roller 2, a middle bottom roller 3, and a back bottom roller 4. The front bottom roller 2 is supported at a predetermined position with respect to the roller stand 5, and the middle and back bottom rollers 3, 4 are supported with a support bracket 3 a fixed so that the position can be adjusted in the front-rear direction with respect to the roller stand 5 a. , Support through 4a Is held. The support brackets 3a and 4a are tightened and fixed at predetermined positions by bolts and nuts (both not shown) penetrating the elongated holes formed in the roller stand 5. The bottom apron 6 is wound around the bottom tensor 7 and the middle pot roller 3.

The waiting arm 8 has a front top roller 9, a middle top roller 10 and a back top roller 11, and a top roller supporting member is provided at a position corresponding to the front bottom roller 2, the middle pot roller 3 and the back bottom roller 4, respectively. It is favored through it. Each of the top rollers 9 to 11 is supported as a pair of two weights. The front bottom roller 2 and the front top roller 9 constitute the final delivery roller pair of the draft device 1.

The waiting arm 8 is provided with a lever 8a rotatably between a pressing position and a releasing position. When the lever 8a is located at the pressing position where the lever 8a comes into contact with the frame 8b of the waiting arm 8 shown in FIG. 1, the top rollers 9 to 11 supported by the waiting arm 8 are connected to the bottom rollers 2, 3, and It is held in a locked state at the pressing position (spinning position) that presses to the 4 side. Further, when the lever 8a is rotated from the state shown in FIG. 1 to the upper release position, the locked state is released.

As shown in FIG. 1, a fiber bundle concentrating device 12 is disposed downstream of the final delivery roller pair of the drafting device 1. The fiber bundle concentrating device 12 includes a sending unit 110 having a nip unit 100 including a nip roller pair 13, a suction unit 14, and a porous apron 15. The nip roller pair 13 includes a bottom nip roller 13 a disposed in parallel with the front bottom roller 2, and a top nip roller 13 b pressed against the bottom nip roller 13 a via the porous apron 15. Have been. The bottom nip roller 13a is configured to be able to be driven positively similarly to each of the bottom rollers 2 to 4. For example, the gear is driven through a gear train by a motor provided on a gear end of a machine base, and the peripheral speed ratio between the bottom nip roller 13a and the front bottom roller 2 is adjusted by changing the gear. Like the top rollers 9 to 11, the top nip roller 13b is supported by the weighting arm 8 via a support member 16 (shown only in FIG. 1) for every two weights. As shown in FIG. 1, the spinning frame is provided with a suction duct 17 extending in the longitudinal direction (perpendicular to the plane of FIG. 1), and the suction section 14 is connected via a connection pipe 18. It is connected to the suction duct 17. As shown in FIGS. 1 and 2, the suction section 14 has a suction slit 19a extending upstream in the moving direction of the fiber bundle (fleece) F across the nip point of the bottom needle roller 13a. It has a cylindrical portion 20 composed of a portion 2Oa and 20b having a sliding guide surface 19 provided with a suction slit 19b extending downstream.

As shown in FIG. 2 and FIG. 3, the suction portion 14 is symmetrically formed with the cylindrical portion 20 around the arc-shaped support cylindrical portion 21 that covers substantially half of the bottom nip roller 13 a in the circumferential direction. It has been established. The cylindrical portion 20 is formed with a portion 20a having an upstream suction slit 19a located upstream of the nip point of the bottom nip roller 13a and a downstream suction slit 19b. It is formed in a state where it is divided into a divided part 2 Ob. That is, the suction portion 14 has a portion 20 a where the suction slit 19 a on the upstream side of the nip point is formed, and a portion 20 b where the suction slit 19 b on the downstream side is formed. It is formed in a divided state. In FIG. 2A and FIG. 3, the porous apron 15 is shown by a virtual line. In FIG. 3, the illustration of a suction nozzle 22 of the pneumatic device described later is omitted.

The upstream portion 2Oa is formed in a shape capable of guiding the porous apron 15 to a position near the nip point between the front bottom roller 2 and the front top roller 9. The downstream portion 2 Ob is arranged so that the fiber bundle F delivered from the porous apron 15 turns at a certain fleece angle. The fleece angle is a line connecting the center of curvature of the arc surface that guides the fiber bundle F to the drawing position after passing through the nip point of the fiber bundle (fleece) F and the nip point; Means the angle formed by the line connecting the fiber F and the point where the fiber bundle F is drawn. The porous apron 15 is wound around the cylindrical part 20 so that a part thereof contacts the bottom nip roller 13a, and along the sliding guide surface 19 with the rotation of the bottom nip roller 13a. They are rotated while sliding. In this embodiment, the porous apron 15 is formed of a woven fabric that can ensure appropriate air permeability.

As shown in Fig. 2A, the suction slits 19a and 19b are located upstream of the nip point. The width of the suction slit 19a located is formed wider than the width of the suction slit 19b located downstream. The suction slit 19b on the downstream side is formed so that its width becomes narrower toward the downstream side.

Of the suction slits 19a and 19b, the upstream suction slit 19a is formed so as to extend obliquely with respect to the moving direction of the porous apron 15 (vertical direction in FIG. 2A), and the downstream side. The suction slit 19 b on the side is formed so as to extend in the same direction as the moving direction of the porous apron 15. In this embodiment, each pair of suction slits 19a and 19b is formed symmetrically.

As shown in FIG. 1 and FIG. 2A, a single type suction nozzle 22 acting to suction the fiber bundle F sent from the draft device 1 when the yarn breaks is provided in the middle of the connection pipe 18. Branched symmetrically. That is, in this embodiment, a part of the suction unit 14 is shared with a pneumatic device that functions to suction the fiber bundle F sent from the draft part when the yarn breaks.

Next, the operation of the device configured as described above will be described.

When the spinning machine is operated, the fiber bundle F is drafted by passing between the bottom rollers 2 to 4 and the top roller 9 to 11 of the draft device 1, and then the fiber bundle collecting device 1 2 Guided to. The nip roller pair 13 is rotated slightly faster than the surface speed of both front rollers 2 and 9, and the fiber bundle F passes through the nip point of the nip roller pair 13 with moderate tension, then turns and twists. Move to the downstream side while receiving.

In addition, when the nip roller is operated, the suction action of the suction duct 17 extends to the suction portion 14 via the connection pipe 18, and the suction slits 19 a and 19 b formed in the sliding guide surface 19 are formed. The suction action extends to the fiber bundle F via the porous apron 15. Then, the fiber bundle F moves to a position corresponding to the suction slits 19a and 19b in a state of being collected by suction.

In a configuration in which the suction slit is arranged only on the upstream side of the nip point as in the conventional device, the fiber bundle once bundled up to the nip point spreads after passing through the nip point. A free triangle is formed at the exit of the nip roller. However, in this embodiment, since the suction slits 19a and 19b are present on the upstream and downstream sides of the nip point of the pair of nip pairs 13, the fiber bundle F is located at the nip point. After It moves in a focused state by the suction action. And, as shown in FIG. 3, almost no free triangle is formed at the exit of the nip roller pair 13. As a result, the release of fibers from both ends of the fiber bundle F after passing through the nip point is suppressed, and the generation of fluff and cotton loss are suppressed, and the effect of improving yarn quality is greatly improved.

The convergence effect of the suction slit 19 b provided downstream of the nip point propagates to some extent upstream of the nip point, and suppresses the spread of the fiber bundle F until the nip point is reached.

This embodiment has the following effects.

(1) On the downstream side of the draft device 1, a delivery unit provided with a nipploller, and a suction slot and a software that extend to the upstream and downstream in the moving direction of the fiber bundle F with the nip point of the delivery unit interposed therebetween A suction portion 14 having a sliding guide surface 19 provided with 19 a and 19 b and a porous apron 15 rotated in a state of contact with the sliding guide surface 19 were provided. Therefore, the drawn fiber bundle F is bundled before reaching the nip point, and moves after being passed through the nip point in a state of being bundled by the suction action. Triangles are hardly formed, and the generation of fluff and cotton loss are suppressed, and the effect of improving yarn quality is greatly improved.

(2) The porous apron 15 is wound around the sliding guide surface 19 and a part of the nip roller 13 a of the pair of nip rollers 13, and the rotational force of the nip roller pair 13 is applied to the porous apron 15. Directly transmitted to Therefore, the perforated apron 15 is not wound around the bottom nipple 13a, but is wrapped around a stationary support tube (guide tube), and is rotated while pressing the perforated apron 15 against the support tube. The wear of the support cylinder and the porous apron 15 is suppressed as compared with the configuration in which the support roller is rotated by the nip rollers.

(3) The pressing force of the top nip roller 13 b against the porous apron 15 is carried by the bottom nip roller 13 a, and the pressing force of the top nip roller 13 b does not act on the suction section 14. Therefore, the suction unit 14 does not require rigidity as compared with the conventional device (Japanese Patent Application Laid-Open No. 11-288673), and has sufficient strength as a product made of resin and made up of 2 weight units. Can be secured.

(4) In the configuration where the top nib roller 13b side is the drive side, the top Since the rollers are generally made of rubber, the peripheral speed changes even if the rotation speed is constant due to the progress of wear. However, since the driving of the nip roller pair 13 is such that the bottom nip roller 13a is the driving side, the peripheral speed is constant regardless of the wear of the top nip roller 13b, and stable yarn quality can be secured. .

(5) The convergence effect of the suction slit 19b provided downstream of the nip point propagates to some extent upstream of the nip point, and the spread of the fiber bundle F until the nip point is reached is suppressed. And the focusing effect is further improved.

(6) The width of the suction slit 19a on the upstream side of the nip point of the nip roller pair 13 is wider than the width of the suction slit 19b on the downstream side, and the width of the suction slit 19b on the downstream side is narrower toward the downstream side. It is formed so that it becomes. Therefore, compared with the case where the width of both suction slits 19a and 19b is constant, the effect of suppressing the spread of the fiber bundle F downstream from the nip point increases, and the effect of improving the yarn quality increases. .

(7) Of the suction slits 19a, 19b, the upstream suction slit 19a is formed so as to extend obliquely with respect to the moving direction of the porous apron 15. Therefore, when the fiber bundle F moves upstream from the nip point, false twisting is applied to the fiber bundle F, and the bundle property of the fiber bundle F is improved.

(8) The suction portion 14 is formed by dividing a portion 20 a where the upstream suction slit 19 a is formed and a portion 20 b where the downstream suction slit 19 b is formed. . If both portions 20a, 20b are formed so as to cover the lower side of the bottom nip roller 13a and communicate with each other, fly dust and dust easily accumulate between the cylindrical portion 20 and the porous apron 15 . However, since the cylindrical portion 20 is divided into the portions 20a and 20b, fly waste and dust entering between the rear surface of the porous apron 15 and the cylindrical portion 20 are discharged from the open portion of the divided cylindrical portion 20. Released. Therefore, it is difficult for fly wool or the like to accumulate between the back surface of the porous apron 15 and the cylindrical portion 20. Further, since the distance between the wide sides of the two portions 20a and 20b is larger than the diameter of the bottom nip roller 13a, the assembling of the suction portion 14 becomes easy.

(9) Since the suction part 14 is made of resin, it is lighter in weight than metal.

(10) The suction part 14 needs to be replaced when the cylindrical part 20 is worn due to friction with the porous apron 15, but the replacement work becomes easy because of the two-integral type. (11) The porous apron 15 is formed of a woven cloth. Therefore, the porous apron 15 can be manufactured at a low cost by selecting a woven fabric that can secure appropriate air permeability without taking the trouble of opening a small hole in the belt constituting the porous apron 15.

(12) Part of the suction unit 14 is shared with the pneumatic device that functions to suction the fleece sent from the draft part when the yarn breaks. Therefore, as compared with the case where the suction section 14 is provided completely independently of the pneumatic device performing the suction action, the installation space for both devices can be reduced and the manufacturing cost can be reduced.

The embodiment is not limited to the above, and may be configured as follows, for example.

は The direction in which the suction slits 19a and 19b extend is such that the upstream suction slit 19a extends obliquely with respect to the moving direction of the porous apron 15, and the downstream suction slit 19b extends in the porous apron 15. The configuration is not limited to the configuration extending in the moving direction. As shown in FIG. 4A, both suction slits 19a and 19b may be in the same direction as the moving direction of the porous apron 15. Further, as shown in FIG. 4B, both the suction slits 19a and 19b may be oblique to the moving direction of the porous apron 15. If the suction slit 19a on the upstream side is formed to extend diagonally, a false twist effect can be expected o

幅 The width of the suction slits 19a and 19b may be constant.

筒 Instead of dividing the cylindrical part 20 of the suction part 14, the cylindrical part 20 may be formed in an arc shape with the side facing the top nip roller 13b open as shown in FIG.

でも Even when the cylindrical part 20 of the suction part 14 is divided, the supporting cylindrical part 21 communicating with the divided parts 20a and 20b is formed in an arc shape that covers almost half of the lower side of the bottom nip roller 13a in the circumferential direction. May be formed.

吸引 The suction unit 14 may be formed with the space between the roller stands 5 as one unit. For example, as shown in FIGS. 6A and 6B, a suction unit 14 having suction slits 19a and 19b for eight weights (not shown for two weights) may be provided. The suction portion 14 extends the portions 20a and 2 Ob constituting the cylindrical portion 20 of the above-described embodiment to both sides of the support cylindrical portion 21 long, and each portion 20a and 20b has a slit for suction of four weights. Form 19a, 19b The configuration is as follows. In this case, the number of parts of the suction unit 14 necessary for one spinning machine is reduced, and the number of connection pipes 18 connecting the suction duct 17 and the suction unit 14 can be reduced, so that the assembly Hassle-free. The roller stands 5 are generally arranged at intervals of spring beads constituting a frame of the spinning machine, and the suction ducts 17 and the like are often constructed by connecting ones having a length corresponding to the interval. Therefore, if the suction section 14 is also configured so as to correspond to the length, packing and the like during transportation and the like become easy.

吸引 The suction section 14 is not limited to the configuration in which two weights are defined as one unit or the space between the roller stands 5 is defined as one unit, but is provided for each weight, or regardless of the length between the roller stands 5 and three weights. A configuration corresponding to the above weight may be adopted.

規制 The suction section 14 may be provided with a regulation guide ゃ to prevent the lateral displacement of the porous apron 15, and a tension device for applying an appropriate tension to the porous apron 15.

代わり Instead of forming the porous apron 15 with a woven cloth, it may be formed with a knitted fabric. Also in this case, as in the case of the woven fabric, appropriate air permeability can be obtained without taking the trouble of opening a small hole in the belt constituting the porous apron 15 and the porous apron 15 can be manufactured at low cost. Further, due to the elasticity of the knitted fabric, the porous apron 15 can be rotated in an appropriate tension state without particularly providing a tension device.

代わり Instead of forming the porous apron 15 with a woven fabric or a knitted fabric, a porous apron 15 may be formed with holes in a rubber or elastic resin belt.

代え Instead of branching the suction nozzle 22 from the connection pipe 18, the suction nozzle 22 may be connected to the suction duct 17 via a dedicated connection pipe.

負 The negative pressure source of the suction section 14 and the negative pressure source of the pneumatic device may be provided independently.

構成 The suction force of the suction unit 14 may be adjustable. For example, a regulating valve (shown by a dashed line in FIG. 1) 23 is provided in a connecting pipe 18 as a conduit communicating with a suction duct 17 as a negative pressure source, and the degree of adjustment of the regulating valve 23 is adjusted. This makes the suction force adjustable. In this case, even when spinning conditions such as the fiber type and spinning speed are changed, the suction force of the suction slits 19a and 19b can be adjusted to an appropriate suction force corresponding to the spinning conditions. When the connection pipe 18 is shared with the suction nozzle 22, the suction nozzle Adjustment is easier if an adjustment valve is provided on the suction part 14 side from the branch part of the nozzle 22 from the connection pipe 18.

ボトム Like the bottom rollers 2 to 4 of the draft device 1, the bottom nip roller 13a is not limited to a configuration driven by a motor provided on a gear end of the machine through a gear train. For example, instead of using the bottom-up roller 13a as a common shaft for all weights, it is divided into a plurality of weights and the rotation is transmitted from the front bottom roller 2 via gears or pelt transmissions. Is also good.

二 The nip section 100 of the delivery section 110 of the fiber bundle concentrator 12 is not limited to the configuration equipped with the nip roller pair 13 but is disclosed in Japanese Patent Publication No. As in the disclosed device, the porous apron 15 may be provided slidably along the peripheral surface of the guide cylinder without providing the bottom nip roller 13a. Then, the top nip roller 13 is rotated while being pressed against the perforated apron 15 to rotate the perforated apron 15, and the dip point by the top nip roller 13 b of the guide cylinder is set. The suction slits 19a and 19b are provided on the upstream and downstream sides of the fiber bundle F in the moving direction. In this case as well, since the suction slits 19a and 19b exist upstream and downstream of the nip point of the fiber bundle F, the fiber bundle F is suctioned even after passing the nip point. Since it moves in a bundled state by receiving the action, the effect of improving the yarn quality is greatly improved as compared with the conventional device as in the above-described embodiment.

多孔 A configuration in which the porous apron 15 is provided on the top side may be adopted.

限ら The present invention is not limited to the draft device of a spinning machine, and may be applied to a draft device of another spinning machine.

The invention (technical idea) grasped from the above embodiment is described below.

(1) In the invention according to any one of claims 1 to 13, the driving of the sending section is configured such that a bottom nip roller side is a driving side.

(2) A ring spinning machine equipped with the fiber bundle concentrating device according to any one of claims 1 to 13 and (1).

As described in detail above, according to the inventions of claims 1 to 13, it is possible to exert a suction and bunching action even on the fiber bundle after passing through the nip point, thereby improving the yarn quality. ST

969Z0 / Z0df / X3d 000 orchid OAV

Claims

The scope of the claims

1. A fiber bundle convergence device that bundles fiber bundles drafted in the draft part,

A delivery unit provided downstream of the final delivery roller pair of the draft part and having a nip portion;

A suction unit having a sliding guide surface provided with a suction slit extending upstream and downstream in the moving direction of the fiber bundle with the two nip points of the delivery unit interposed therebetween;

A multi-hole apron that constitutes the delivery section and is rotated in contact with the sliding guide surface;

The fiber bundle concentrating device, wherein the sliding guide surface is arranged so that the fiber bundle sent out from the porous apron is turned at a fleece angle.

2. The nip portion includes a nip roller pair, and the porous apron is wound around the sliding guide surface and a part of one of the nip rollers of the nip roller pair. Fiber bundle concentrator.

3. The fiber bundle concentrator according to claim 2, wherein the porous apron is rotated by a rotational force of the one nip roller.

4. The fiber bundle according to claim 3, wherein the pair of nip rollers is a top nip roller and a bottom nip roller, and the rotating force is a rotational force of the bottom nip roller.

5. In the suction slit, the width of the upstream suction slit located on the upstream side of the nip point is wider than the width of the downstream suction slit located on the downstream side, and the suction on the downstream side is performed. The fiber bundle concentrating device according to claim 1, wherein the slit for use is formed such that the width thereof becomes narrower toward the downstream side.

6. The fiber bundle concentrator according to claim 1, wherein the suction slit is formed so as to extend obliquely with respect to a moving direction of the porous apron.

7. The suction part is divided into a part where the suction slit on the upstream side located on the upstream side of the nip point is formed and a part where the slit for suction on the downstream side located on the downstream side is formed. The fiber bundle concentrating device according to claim 1, wherein the fiber bundle concentrating device is formed in a formed state.

8. The fiber bundle according to claim 1, wherein the suction portion is made of resin and formed in units of two weights.

9. The fiber bundle concentrator according to claim 1, wherein the suction unit is formed with a unit between roller stands.

10. The fiber bundle according to claim 1, wherein the porous apron is formed of a woven fabric.

11. The fiber according to claim 1, wherein the porous apron is formed of a knitted fabric.

12. The fiber according to claim 1, wherein the suction portion is configured to be capable of adjusting a suction force.

13. The fiber bundle bundling device according to claim 1, wherein a part of the suction unit is shared with a pneumatic device that functions to suck fleece sent out from the draft part when the yarn breaks.