KR20040023523A - Spinning machine and spinning method - Google Patents

Abstract

PURPOSE: To provide a spinning machine enabling a sucking pressure of a fiber bundle-collecting device to be set and changed so that the quality of a spun yarn may satisfy a desired condition. CONSTITUTION: Two or more ducts 44 for the fiber bundle-collecting device are arranged along the longitudinal direction of a spinning machine frame. Sucking devices 45 having fan motors are connected to each of the ducts 44 through pipes 46, and sucking parts S are connected thereto through connecting pipes 48. Each motor 47 is connected to a common inverter 52, and the inverter 52 controls the motor 47 based on a command signal from a controller 54. The controller 54 has a memory 55, and corresponding data, etc., between various kinds of spinning conditions such as fiber kinds and counts of the spun yarns, and rotational speeds of the motor 47 are memorized in the memory. Data for setting the sucking pressure acting on the fiber bundle so as to be in order of low count>middle count>fine count are also memorized in the memory. The controller 54 is regulated so as to order the rotational speed of the motor 47 corresponding to the spinning condition to the inverter 52.

Description

Spinning Machines and Spinning Methods {SPINNING MACHINE AND SPINNING METHOD}

TECHNICAL FIELD The present invention relates to a spinning machine and a spinning method, and more particularly, for example, a fiber arranged on a downstream side of a drafting device (drafting part) of a spinning machine to focus a fiber bundle drafted with a drafting device. A spinning machine having a speed focusing device and a spinning method using the spinning machine.

Until now, a suction action has been generally used to focus the fiber bundle in the fiber bundle focusing apparatus of this type (see, for example, Japanese Patent Laid-Open Nos. 11-286837 A and 2000-73224 A). In each of the devices disclosed in Patent Documents 1 and 2 above, a hollow profile (guide cylinder) constituting a stationary sliding surface having a suction slit is formed on the bottom side of the downstream of the final roller of the drafting device to form this hollow profile. A perforated belt for transportation is wound around the center. In addition, a nip roller is provided on the upper side which is held in contact with the perforated belt to define a nip point. The nip roller is driven through the transfer belt by the final roller. Instead of the configuration for driving the nip roller through the conveyance belt, a configuration in which the nip roller is driven through the conveyance roller which is held in contact with the final roller is also disclosed.

Furthermore, a fiber bundle focusing device having a configuration different from that disclosed in Patent Document 1 is disclosed in that a hollow profile having suction slits formed on the sliding surface and a perforated belt are wound between the tension rollers (Japanese Laid-Open Patent Publication) No. 2000-34631 A).

When spinning the yarn with the spinning machine provided with the fiber focusing device, the suction pressure applied on the suction slit of the fiber focusing device was considered to affect the quality of the spinning yarn. However, until now, there is no document described about spinning the yarn of appropriate quality by actively changing the suction pressure according to the spinning conditions.

The present inventors experimentally changed the suction pressure to investigate the quality of the spun yarn. As a result, in the region where the suction pressure is low, the yarn quality is remarkably improved as the negative pressure increases (decrease in the degree of decompression), and when the negative pressure is above a certain level, the fiber bundle becomes saturated so that the quality of the yarn is kept constant. It was found to show a tendency. In addition, it was found that the level at which the pressure starts to be constant varies depending on the thickness (number of times) of the yarn, the fiber type, and the spindle speed.

From this fact, it was concluded that it is important to apply a suction pressure above a certain level (hereinafter referred to as a necessary pressure) to the fiber bundle in order to increase the collecting speed of the fiber bundle by the suction action to realize desirable yarn quality. However, from the safety point of view, if the pressure setting of the suction device is fixed in accordance with the spinning condition of the high required pressure, it causes a result of unnecessarily consuming energy such as power required for suction for the spinning condition of the low required pressure.

Furthermore, in consideration of such a situation, even if the spinning device is configured such that the suction pressure can be changed in accordance with each spinning condition, even if the machine operator performs the pressure setting without wasting energy, the proper value cannot be easily determined, and the spinning condition Whenever this change is made, there is a difficulty in finding an appropriate value according to the experiment radiation conducted several times.

In general, in yarns wound on one full bobbin, it is known that yarn quality, such as fluff, changes depending on changes in yarn tension at the portion to be twisted / wounded. Therefore, in order to obtain a more homogeneous thread, it is most appropriate to change the suction pressure rather than maintaining a constant level from the start of winding until the full bobbin stops.

In view of the above problems, it is a first object of the present invention to provide a spinning machine capable of setting and changing the suction pressure of a fiber bundle focusing device so that the quality of the spun yarn meets a desired condition. Further, a second object of the present invention is to provide a spinning method capable of spinning a yarn of a certain quality by forming a fiber bundle focusing device so as to exert an appropriate fiber bundle focusing action from the time of winding up to the end.

In order to achieve the first object, the invention described in claim 1 is provided with a spinning machine provided with a fiber bundle focusing device provided downstream of the final delivery roller pair of the drafting portion to focus the fiber bundles drafted by the drafting portion. It is about. The fiber bundle concentrating device comprises a feeding part having a nip roller, a suction part having a suction hole formed to extend at least toward an upstream side of the nip point of the sending part with respect to the moving direction of the fiber bundle, and the feeding part and rotating along the suction part. And a suction means capable of arbitrarily setting and changing the suction pressure acting on the suction part.

As described above, according to the present invention, the fiber bundle drafted in the drafting portion is focused by the fiber bundle focusing device formed downstream of the final delivery roller pair of the drafting portion and starts to move in a focused state. Therefore, compared with the spinning machine which is not equipped with a fiber-focusing apparatus, generation | occurrence | production of a fluff and fall fall are suppressed, and the improvement effect of a yarn quality is improved significantly. The focusing action of the fiber bundle focusing device is caused by the suction action of the suction hole of the suction portion to which the suction pressure is applied by the suction means. Thereafter, the suction means can arbitrarily set and change the suction pressure acting on the suction part, thus allowing the suction pressure to be changed to the optimum value in accordance with the spinning conditions to spin.

According to the invention as set forth in claim 2, in the invention as set forth in claim 1, the suction means is changed so that the magnitude of the suction pressure corresponds to the number of times> number of times> number of times in correspondence with the number of times, the number of times, and the number of times of the spinning chamber. Driven. In the above-described invention, the suction pressure is changed to an appropriate value in accordance with the thickness of the spinning chamber to perform spinning. As a result, the focusing action of the fiber bundle focusing device is appropriately performed in a state where unnecessary consumption of energy is suppressed.

According to the invention set forth in claim 3, in the invention set forth in claim 1 or 2, the suction means is driven to be controlled so as to change the suction pressure by a control means, and the control means is adapted to a suitable suction pressure in response to the spinning condition. It is configured to automatically set the size of. In the present invention, by setting the spinning condition, the appropriate suction pressure corresponding to the spinning condition is automatically set in the control means. Then, when the spinning machine is operated, the suction means is driven to be controlled by the control means such that the suction pressure of the suction portion becomes an appropriate pressure corresponding to the spinning condition.

According to the invention according to claim 4, in the invention according to any one of claims 1 to 3, a suction pipe having a suction hole corresponding to each spindle is formed in the suction part, and the suction pipe has a plurality of suction pipes. It is connected to a duct held at negative pressure by the device. In the present invention, when the suction device is abnormally stopped, the suction action of the suction hole is ensured by the negative pressure generated by the remaining suction device, and the quality of the spinning chamber is maintained within the allowable range.

According to the invention disclosed in claim 5, in the invention according to claim 4, the duct to which the suction pipe is connected is formed separately from the pneumatic duct. In the present invention, the duct can be maintained at a predetermined negative pressure without increasing the suction device.

In order to achieve the second object, the invention according to claim 6 includes: a delivery section provided with a nip roller, a suction section provided with a suction hole formed so as to extend at least toward an upstream side of the nip point of the delivery section with respect to the moving direction of the fiber bundle; A ventilation member which constitutes a delivery unit and rotates along the suction unit, and suction means which can arbitrarily set and change the suction pressure acting on the suction unit, provided on the downstream side of the final delivery roller pair of the drafting unit, the drafting unit It relates to a spinning method using a spinning machine equipped with a fiber bundle focusing device for focusing the fiber bundle drafted by. Thereafter, the suction pressure is adjusted to the maximum when the amount of the yarn wound on the bobbin is approximately 30 percent of the full bobbin, and spinning is performed.

According to the above-described invention, the suction pressure of the fiber focusing device is not uniformly radiated from the time when the spinning chamber (i.e., full bobbin) starts to wrap up, but the amount of yarn wound on the bobbin is When it is about 30 percent, the suction of the suction hole is radiated to the maximum. As a result, the quality of the spinning chamber is improved.

1 is a plan view schematically showing an arrangement of a suction device and a duct according to one embodiment;

2 is a partial cross-sectional view schematically showing the drafting device and the fiber focusing device;

3 is a partial schematic view showing the relationship between the suction portion and the bottom nip roller;

4A is a partial schematic view of the fiber bundle focusing apparatus viewed from the front of the fiber bundle moving direction;

4b is a front view of a rotating shaft,

5 is a partially enlarged view of FIG. 2;

6 is a partial perspective view of a connector;

7A to 7F are graphs showing the relation between suction pressure and hairiness or the relation between suction pressure and U% when spinning yarns with different numbers, and

8 is a graph showing a relationship between fluff and winding amount in a general ring spinning machine.

Explanation of the reference numerals for the main parts of the drawing

11: drafting device 12-14: bottom roller

12a: gear 15: roller stand

15a: Support portion of roller stand 16: Bottom apron

17: bottom tensor 18: weight arm

18a: Lever 18b: Frame of heavy arm

19 ~ 21: upper roller 30: fiber focusing device

31: sending part 31a: upper nip roller

32, 33: suction pipe 32a, 33a: suction hole

32b, 33b: sliding surface 34: aeration apron

35: rotating shaft 35a: bottom nip roller

36 support member 37 support beam

38 support arm 38a support portion of support arm

39: bearing 40: end plug

40a: coupling portion 40b: coupling hole

41: gear 42: support arm

42: intermediate gear 44: duct

45: suction device 46: tube

47: motor 47a: fan

48: connector 48a, 48b: coupling hole

49: bellows portion 50: suction nozzle

51: pneumatic duct 52: inverter

53: AC power supply 54: control device

55 memory 56: abnormality detection sensor

Embodiments of the present invention will be described with reference to FIGS. 1 to 8. 1 is a plan view schematically showing the relationship between the duct, the suction device, and the suction portion of the fiber bundle focusing device, Figure 2 is a partial cross-sectional view schematically showing one side of the drafting device. Fig. 3 is a partial schematic view of the top roller side omitted to show the relationship between the bottom roller of the drafting device, the suction part of the fiber bundle and the bottom nip roller. Fig. 4A is a schematic view of the fiber bundle focusing apparatus as seen from the direction of drawing the fiber bundle at the nip point (front side with respect to the fiber bundle moving direction in the drafting apparatus).

As shown in FIG. 2, the drafting device 11 as a drafting portion has a three-wire configuration having a front bottom roller 12, a middle bottom roller 13, and a rear bottom roller 14. . The front bottom roller 12 is supported at a predetermined position relative to the roller stand 15, and the middle bottom roller 13 and the rear bottom roller 14 are fixed to be longitudinally adjustable with respect to the roller stand 15. It is supported through the supported support brackets 13a and 14a. The support brackets 13a and 14a are fixed at predetermined positions by bolts and nuts (both not shown) that penetrate the long holes formed in the roller stand 15. The bottom apron 16 is wrapped around the bottom tensor 17 and the middle bottom roller 13.

The upper upper roller 19, the middle upper roller 20, and the rear upper roller 21 are upper at positions corresponding to the front bottom roller 12, the middle bottom roller 13, and the rear bottom roller 14, respectively. It is supported by the weight arm 18 via the roller support member, respectively. Each upper roller 19-21 is supported in the two spindle unit. The front bottom roller 12 and the front top roller 19 constitute the final delivery roller pair of the drafting device 11.

On the weight arm 18, the lever 18a is arranged to be rotatable in the press position and the release position. In the state where the lever 18a is disposed at a pressing position in contact with the frame 18b of the weight arm 18 shown in FIG. 2, the bottom roller is mounted on the upper rollers 19 to 21 supported by the weight arm 18. It is kept in a locked state in the pressurized position which pushes toward (12, 13, 14). In addition, in the state in which the lever 18a is rotated to the upper release position from the state shown in FIG. 2, the locked state is released.

As shown in Fig. 2, a fiber bundle focusing device 30 is disposed downstream of the final delivery roller pair of the drafting device 11. The fiber bundle concentrator 30 is provided with the sending part 31, the suction pipes 32 and 33 as the suction part S, and the ventilation apron 34 as a ventilation member. The delivery part 31 contacts the bottom nip roller 35a through the ventilation apron 34 and the bottom nip roller 35a as the nip roller formed on the rotating shaft 35 arranged in parallel with the front bottom roller 12. It consists of the upper nip roller 31a as a nip roller pressurized.

In the fiber bundle concentrator 30 of the above embodiment, as shown in FIG. 4A, the upper nip roller 31a is supported every two spindles as the upper rollers 19 to 21 of the drafting device 11. The member 36 (shown in FIGS. 2 and 5) is supported by the weight arm 18 in between. In addition, in the above embodiment, the supporting member 36 is formed integrally with the supporting member of the front upper roller 19.

On the other hand, at the bottom side of the fiber bundle device 30, half of the spindles arranged between the roller stands 15 of the drafting device 11, that is, four spindles constitute one unit in this embodiment. have. 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, the base end is supported by the support beam 37 extending in the longitudinal direction of the machine base. The furnace support arm 38 is disposed, and the rotation 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 a plurality of spindles (four spindles in the above embodiment), and bearings 39 are fixed at both ends thereof. Thereafter, the bearing 39 is coupled to the end plug 40 so that the end plug 40 is formed on the roller stand 15 and the support arm 38 at the engaging portion 40a, as shown in FIG. 4A. It is supported by the support portions 15a and 38a, whereby the rotating shaft 35 is rotatably supported between the roller stand 15 and the support arm 38. The support parts 15a and 38a are formed so that they can support the two end plugs 40, and can support the end plug 40 attached to the edge part of the adjacent rotating shaft 35. As shown in FIG.

The support part 15a is comprised from the block fixed to the roller stand 15, and has the engaging recess extended obliquely upward on the front side of a machine base. The support portion 38a also has an engaging recess extending upwardly inclined on the front side of the machine base. Thereafter, the end plug 40 has an engaging portion 40a that is engageable with the engaging recess, and is formed to be engageable with the supports 15a, 38a in the engaging portion 40a in a single snap operation.

The rotary shaft 35 is formed so that the gear 41 can rotate integrally with the rotary shaft 35 at the center in the longitudinal direction. 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. Also, like the support arm 38, the intermediate gear 43 is rotatable in the form of a mesh with the gear portion 12a and the gear 41 by a support arm 42 whose base end is fixed to the support beam 37. Is supported. That is, the rotational force of the front bottom roller 12 is transmitted to the rotation shaft 35 by the gear part 12a, the intermediate gear 43, and the gear 41.

1 and 2, the machine base of the spinning machine is arranged with a duct 44 for the fiber focusing device 30 so as to extend in its longitudinal direction (the direction perpendicular to the ground of FIG. 2). have. As shown in Fig. 1, a plurality of ducts 44 are formed to extend in the longitudinal direction of the machine base of the spinning machine. In this embodiment, the length of each duct 44 is formed to correspond to 24 spindles on one side and 48 spindles on both sides. A plurality of suction devices 45 (three in this embodiment) for maintaining the inside of each duct 44 at negative pressure are connected to the respective ducts 44 through the pipes 46. That is, in this embodiment, one suction device 45 is formed for one unit consisting of sixteen spindles. The suction device 45 is composed of a fan motor that drives the fan 47a by the motor 47. As shown in FIG. 2, the duct 44 is disposed at the center of the machine base of the spinning machine on the upper and rear sides of the drafting device 11, and the suction device 45 is disposed below the duct 44. have. The suction means is comprised by the duct 44 and the suction apparatus 45. As shown in FIG.

As shown in FIG. 1, the suction part S is formed every four spindles so as to extend parallel to the duct 44, and is connected to the duct 44 via the connecting pipe 48. A bellows portion 49 (shown in FIG. 2 only) is provided in the middle of each connecting pipe 48. In FIG. 1, the suction pipes 32 and 33 are collectively shown as the suction part S, and the suction holes formed in each of the suction pipes 32 and 33 are collectively shown in the broken line circle.

As shown in FIG. 6, coupling holes 48a and 48b are formed at the distal end of the connecting pipe 48 so that the suction pipes 32 and 33 are detachably mounted. The first ends of the suction pipes 32 and 33 are detachably attached to the left and right sides of the connecting pipe 48, and the second ends of the suction pipes 32 and 33 are coupled to the end plug 40. In addition, the end plug 40 is formed with a coupling hole 40b to which the bearing 39 is engaged. 6 is a partial perspective view schematically showing a state in which suction pipes 32 and 33 are mounted on one side of the connection pipe 48.

As shown in FIG. 3, the suction pipe 32 has a slit type with a nip point between the bottom nip roller 35a and extending upstream with respect to the moving direction of the fiber bundle (fleece) F. As shown in FIG. Has a sliding surface 32b having a suction hole 32a formed thereon. The suction pipe 33 has a sliding surface 33b with a slit suction hole 33a extending toward the downstream side. 3 and 5, the suction pipe 32 is disposed upstream of the nip point of the bottom nip roller 35a with respect to the moving direction of the fiber bundle, and the suction pipe 33 is located downstream thereof. It is arranged. In addition, in FIG. 3, in order to make the suction holes 32a and 33a easy to see, the ventilation apron 34 is shown by the broken line.

Each suction pipe 32 is a shape which can guide the ventilation apron 34 to reach the nip point vicinity of the front bottom roller 12 and the front top roller 19. As shown in FIG. The suction pipe 33 is arrange | positioned so that the fiber bundle F from the ventilation apron 34 may be redirected at a certain fleece angle. The term "flip angle" refers to a line segment connecting the nip point and the center of curvature of the arc surface that guides the fiber bundle F to the withdrawal position after the fiber bundle (F) passes through the nip point; It means the angle formed by the line segment connecting the center of curvature and the point of extraction of the fiber bundle (F). The aeration apron 34 slides on the sliding surfaces 32b and 33b so that a part contacts the suction pipes 32 and 33, a part contacts the bottom nip roller 35a, and also in accordance with the rotation of the bottom nip roller 35a. It is surrounded to rotate. In this embodiment, the ventilation apron 34 is formed of the fabric which can ensure appropriate breathability.

As shown in FIG. 2 and FIG. 4A and the like, a suction nozzle of a unitary pneumatic device that sucks the fiber bundle F sent out from the drafting device 11 when the thread is broken near the lower portion of the suction pipe 33. The tip end part of 50 is arrange | positioned, respectively. The base end of the suction nozzle 50 is connected to a pneumatic duct 51 common between all spindles.

As shown in Fig. 1, each motor 47 is connected to a commercial AC power supply 53 through a common inverter 52. The inverter 52 incorporates a converter circuit and an inverter circuit. After converting the alternating current of the alternating current power source 53 into a direct current in the converter circuit, the inverter circuit converts the alternating current into an alternating current corresponding to a desired frequency and voltage to output a final current. The inverter 52 is electrically connected to the control apparatus 54 and controls the motor 47 according to the command signal from the control apparatus 54. The control device 54 is electrically connected to a main control unit (not shown) of the spinning machine. The inverter 52 and the control device 54 constitute control means.

The control device 54 has a CPU (not shown) and a memory 55 so as to be able to communicate with the main control device via a serial interface. The memory 55 stores correspondence data between spinning conditions including various fiber types, the number of spinning chambers, and the like, and the rotational speed of the motor 47. The memory 55 stores data for setting the magnitude of the suction pressure acting on the fiber bundle F so that the number of times> the number of times> the number of times in accordance with the number of times, the number of times, and the number of times in the spinning chamber is stored. have. The data is obtained, for example, by carrying out an experimental spinning operation. For example, the suction pressure is set to 4 kPa for the number of times, 2 to 3 kPa for the number of times, and 1 to 2 kPa for the number of times.

The control apparatus 54 receives the radiation condition data at the time of the radiation operation from the main controller, and instructs the inverter 52 of the rotational speed of the motor 47 corresponding to the radiation condition. That is, the suction means (suction device 45) is configured to control the suction pressure by the control means (the inverter 52 and the control device 54), and the control means automatically adjusts the appropriate suction pressure in response to the radiation condition. It is configured to be set.

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

Before operation of the spinning machine, spinning conditions such as various fiber types and the number of spinning chambers are input to the main controller. When the spinning machine is operated, the fiber bundle F is drafted through the bottom rollers 12 to 14 and the top rollers 19 to 21 of the drafting apparatus 11, and then into the fiber bundle focusing device 30. You are guided. The delivery section 31 is rotated at a speed slightly faster than the surface speeds of the front bottom roller 12 and the front top roller 19. The fiber bundle F is configured to move the nip point of the delivery section 31 in an appropriate tension state. After passing, it moves forward and under the direction of torsion.

In addition, the suction action of the duct 44 is applied to the suction pipes 32 and 33 via the connecting pipe 48, and the suction action of the suction holes 32a and 33a formed in the sliding surfaces 32b and 33b is applied to the aeration apron ( 34) through the fiber bundle (F). Thereafter, the fiber bundle F moves while being suction-focused toward the position corresponding to the suction holes 32a and 33a. Since the suction holes 32a and 33a exist on the upstream side and the downstream side of the nip point of the sending part 31, the fiber bundle F moves while being attracted by a suction action even after passing through the nip point. As a result, the separation of fibers is suppressed at both ends of each fiber bundle F after passing through the nip point, and the occurrence of fluff and fall is suppressed, and the effect of substantially improving the quality of the yarn is improved.

In the suction device 45, the rotation of the motor 47 by the inverter 52 is such that the negative pressure in the duct 44 becomes an appropriate value corresponding to the spinning condition including the thickness (number of times) of the yarn, the fiber type, and the like. The speed is controlled. As a result, even if the spinning conditions change, the desired quality of yarn is spun.

In FIGS. 7A and 7B, 7C and 7D, and 7E and 7F, the number of times (exhausted thread: 10 times), the number of times (exhausted thread: 40 times), the number of times (exhausted) Yarn: The relationship between the suction pressure and the cow and the relation between the suction pressure and U% when the yarn of yarn number 80) was spun. The term "mouse" means the total length of fluff present in a 1 cm thread. However, in general, the drawing is not shown in units. The suction pressure acting on the fiber bundle F through the suction holes 32a and 33a changes the quality of the spinning chamber. In the region where the suction pressure is low, the quality of the yarn is remarkably improved as the negative pressure increases (decreases in the degree of decompression), and when the negative pressure reaches a certain level or more, the negative pressure tends to be substantially constant, and the fiber bundle at this level It is saturated. The magnitude of the negative pressure kept constant is formed in the relationship of number of times> number of times> number of times. The memory 55 stores data for setting the rotational speed of the motor 47 so as to be a suction pressure determined in accordance with the spinning result. When the data of the radiation condition is input to the controller 54 from the main controller, the rotation speed appropriate to the radiation condition is instructed to the inverter 52. Thereafter, the inverter 52 controls the motor 47 to reach a predetermined rotational speed.

The said embodiment has the following effects.

(1) The fiber bundle concentrating device 30 is provided with suction means (suction device 45) which can arbitrarily set and change the suction pressure acting on the suction part S. FIG. Therefore, it is possible to emit the suction pressure acting on the suction part S while changing the quality of the yarn so as to have an appropriate value so as to satisfy the desired condition in accordance with the spinning conditions.

(2) The suction device 45 satisfies the relationship between the number of times> the number of times> the number of times of the number of times of the suction hole 32a, 33a corresponding to the number of times, the number of times, and the number of times in the spinning chamber. Is driven to. Therefore, the suction pressure is changed to an appropriate value in accordance with the thickness of the spinning chamber, and spinning is performed, so that the focusing action of the fiber bundle concentrator 30 is appropriately performed while suppressing the consumption of unnecessary energy.

(3) The suction device 45 is driven controlled by the control means (inverter 52 and the control device 54) to change the suction pressure, and the control means can automatically set an appropriate suction pressure according to the spinning condition. It is configured to. Thus, in the case of changing the radiation condition, it is sufficient for the machine operator to input and set the radiation condition before operation. Therefore, the operation of changing the spinning condition is easily carried out.

(4) Suction pipes 32 and 33 which apply suction to the draft fiber bundle F and each have suction holes 32a and 33a provided in correspondence with the respective spindles are connected to the duct 44 through the connection pipe 48. ) The duct 44 is maintained to have negative pressure by the plurality of suction devices 45. Therefore, when one suction device 45 is abnormally stopped, the suction action of the suction holes 32a and 33a is ensured by the negative pressure generated by the remaining suction device 45, and the quality of the radiation chamber is within the allowable range. Is maintained at.

(5) A duct 44 dedicated to the fiber bundle device 30 is formed separately from the pneumatic duct 51. Accordingly, the inside of the duct 44 can be maintained at a predetermined negative pressure without increasing the suction device 45.

(6) The focusing action by the suction hole 33a formed on the downstream side of the nip point is transmitted to the upstream side of the nip point to some extent. Therefore, the divergence of the fiber bundle F is suppressed until reaching the nip point, and the focusing effect is further improved.

This invention is not limited to the said embodiment. For example, the embodiment may be configured as follows.

In the above embodiment, in a predetermined spinning condition, the suction pressure of the suction unit S of the fiber bundle focusing device 30 is constant from the time when the spinning chamber starts to wind up (ie, full bobbin). Spinning is carried out. However, from the time when the radiation chamber starts to be wound up to the full bobbin, the suction pressure of the suction unit S is increased to drive the suction device 45 at the time when the fluff is likely to occur in consideration of the fluff formation state. Can be. FIG. 8 is a graph showing the relationship between the number of occurrences of fluff and the amount of winding in a ring spinning machine not equipped with the fiber focusing device 30. In the longitudinal axis of FIG. 8, "3 mm fluff number / 10 m" represents the number of fluffs having a length of 3 mm per 10 m of yarn. From Fig. 8, it was found that fluff was likely to occur when the actual winding amount to bobbin reached approximately 30 percent (30 percent bundle) of the full bobbin. In the above embodiment, spinning is performed by adjusting the suction pressure of the suction unit S to be the maximum at a time when the actual winding amount to the bobbin reaches approximately 30 percent (30 percent bundle) of the full bobbin. For example, the memory 55 stores data indicating the relationship between the winding amount under each spinning condition and the suction pressure of the suction unit S. FIG. Thereafter, the control device 54 instructs the rotation speed of the motor 47 to the inverter 52 in response to the winding amount after it starts to radiate. Information about the winding amount is input to the control device 54 from the main controller. In this case, spinning is not carried out so that the suction pressure of the fiber focusing device 30 is constant from the time when the spinning chamber starts to wind up to the end (that is, full bobbin), and the yarn winding amount into the bobbin is approximately 30 At the time when the percentage is reached, spinning is performed so that the suction of the suction hole is maximized. As a result, the production of fluff and the unevenness of the yarn become constant in the room wound around the full bobbin, and the quality of the spinning chamber is further improved.

Instead of the configuration in which the control device 54 that controls the motor 47 through the inverter 52 in response to the radiation condition receives data on the radiation condition from the main controller through communication, the machine operator 54 controls the controller 54. A configuration can be used to set the radiation conditions for the input.

When inputting the radiation condition, a configuration in which the selected condition among the radiation conditions is stored in the main controller or the control device 54 in advance can be used.

The suction pressure of the suction unit S can be set regardless of the spinning condition. In this case, the quality of the yarn can be intentionally changed in accordance with the use of the spinning chamber, and the spinning chamber of excessive quality can be avoided.

The controller 54 stores the data indicating the relationship between the spinning condition and the suction pressure in advance, and the controller 54 passes through the inverter 52 so that the predetermined suction pressure is achieved by inputting the spinning condition. Instead of the configuration for driving control, the configuration in which the machine operator inputs the rotational speed of the motor 47 to the controller 54 can be used. In this case, a chart indicating the relationship between the spinning condition and the rotational speed of the motor 47 is prepared in advance, and the machine operator confirms the rotational speed of the motor 47 corresponding to the spinning condition by using the chart or the like. It is desirable to be able to.

Without forming the control device 54, a configuration in which the main controller of the radiating machine serves as the control device 54 and directly outputs a command signal to the inverter 52 can also be used.

In the general sense, in order to intentionally control the yarn quality, not to adjust the suction pressure of the suction unit S to an appropriate value in order to radiate a yarn having good yarn quality, that is, a yarn having a low fluff occurrence or a nonuniformity of the yarn. The suction pressure of the suction unit S can be adjusted. For example, even if the fiber types are the same, the quality of the yarn required for the fabric thread and the knitting thread is different. For example, knitting yarns are more lint-free compared to yarns for textiles, and the suction pressure can be set at a lower level to reduce energy consumption. In addition, instead of aiming to make the thread homogeneous over its entire length, instead of aiming to actively form the nonuniformity of the thread like the design room, the suction pressure of the suction part S from the start of winding to the full bobbin time The suction device 45 can be driven to appropriately change.

The number of the suction devices 45 connected to the duct 44 is not limited to two or more, but may be one. However, in one case, if the suction device 45 breaks down, the machine operation is immediately stopped, and the quality of the seal is deteriorated to prevent radiation. As a result, it is preferable that a plurality of suction devices 45 are connected to the duct 44.

The length of the duct 44 is not limited to the length corresponding to 24 spindles on one side and the length corresponding to 48 spindles on both sides, and a length corresponding to an appropriate number of spindles can be used. In this case, the length corresponding to the spindle of multiple of eight is preferable.

Instead of forming a plurality of ducts 44 along the longitudinal direction of the machine base of the spinning machine, only one duct 44 can be formed over the length of the machine base of the spinning machine.

Instead of the arrangement of sharing the duct 44 by the suction pipes 32 and 33 disposed on the left and right sides of the spinning machine, the left and right ducts 44 can be arranged in two rows along the longitudinal direction of the machine base of the spinning machine.

A configuration in which one suction device 45 is connected to the duct 44 can also be used.

In the configuration in which a plurality of suction devices 45 are connected to the duct 44, the speed commands to the motors 47 of the respective suction devices 45 are not the same, and the speed commands can be set for each motor 47. Thereafter, an abnormality detecting means for detecting an abnormality of the suction device 45 is formed, and the duct connected to the suction device 45 is stopped at the same time as the abnormality detecting signal of the abnormality detecting means is stopped. A configuration configured to improve the performance of another suction device 45 that is connected to 44 and does not appear abnormal can be used. For example, as shown by the broken line in FIG. 1, each suction device 45 is provided with an abnormality detecting sensor 56 of the motor 47 used as the abnormality detecting means. As the abnormality detection sensor 56, the rotational speed sensor of the drive shaft of the motor 47 is used, for example. Then, the control apparatus 54 stops the operation | movement of the suction apparatus 45 which an abnormality generate | occur | produced according to the abnormality detection signal of the abnormality detection sensor 56, and also the duct 44 connected to the suction apparatus 45 The speed command to the motor 47 is changed to improve the performance of the other suction device 45 connected with. In this case, if an abnormality occurs in one suction apparatus 45, even if this suction apparatus 45 is stopped, it will continue to operate while the negative pressure in the duct 44 is maintained in a predetermined range. Thus, spinning can continue until the quality of the yarn to be spun reaches a predetermined doping time maintained in a stable state.

In the configuration driven to improve the performance of the other suction device 45 when an abnormality occurs in the suction device 45, the same duct 44, instead of the configuration that makes each motor 47 controllable independently, Each group of motors 47 connected to it can be made controllable. For example, in the case of driving the motor 47 as an inverter, an inverter is provided for each group of motors 47 connected to the same duct 44. For example, if three suction devices 45 are connected to the same duct 44, one inverter 52 is provided for every three motors 47. In this case, compared with the case where the motor 47 is controlled independently, the control and the configuration are simplified.

The position of the duct 44 is not limited only to the rear side upper side of the drafting apparatus 11, but may be arrange | positioned also at the rear side of the drafting apparatus 11 or the rear side lower side of the drafting apparatus 11.

In the spinning machine of the so-called single spindle drive system which drives the spindle independently by a separate motor, the suction is carried out from the duct 44 connected to the abnormal suction device 45 in accordance with the abnormal detection signal of the abnormality detecting means of the suction device 45. It is configured to stop the actuation of the suction pipes 32 and 33 and the corresponding spindles under action. Thereafter, the other spindle continues to spin until a predetermined doping time is reached. In this case, the number of spindles in which radiation is stopped during winding is reduced compared with the configuration in which radiation of all spindles is stopped.

Instead of a configuration in which the rotating shaft 35 and the suction pipes 32 and 33 are arranged so that four spindles form one unit, one unit is arranged between two adjacent roller stands 15 (for example, eight spindles) or two. It can be composed of the number of spindles between the four spindles. Alternatively, it is not necessary to configure all the units with the same number of spindles, and configure two types of spindles so that the number of spindles between adjacent roller stands 15 is different from each other (for example, six spindles and two spindles). Units can be formed.

This suction pipe can be integrally formed without separately forming the suction pipes 32 and 33, and this suction pipe can have an arc shape in which the opposite side of the upper nip roller 31a is open.

The suction pipes 32 and 33 can be formed so that the ends on the opposite side of the side opposite to the connecting pipe 48 are in a closed shape. In this case, the end plug 40 has a coupling hole 40b to which the bearing 39 is coupled and the suction pipes 32 and 33 without considering the airtight sealing of the end portions of the suction pipes 32 and 33. It can be configured to have an engaging portion (hole) to which the end is engaged. Thus, manufacturing can be simplified.

Instead of forming the ventilation apron 34 from the woven fabric or the knitted fabric, it may be formed by punching a rubber belt or a belt made of a resin having elasticity.

The suction pipes 32 and 33 constituting the suction portion can be formed integrally with the connecting pipe 48.

This invention is not limited only to the structure which forms the suction holes 32a and 33a in the upstream and downstream which the nip point of fiber bundle F is sandwiched therebetween. A configuration in which the suction hole 32a is formed only on the upstream side with respect to the nip point can also be used. In this case, the manufacturing method and the assembly can be substantially the same by using the suction pipe 33 in which the suction hole 33a is not formed therein. In addition, the structure which omits the suction pipe 33 and winds the ventilation apron 34 between the suction pipe 32 and the bottom nip roller 35a can be used.

As the configuration for driving the ventilation apron 34, the suction pipes 32 and 33 and the bottom nip roller 35a are omitted, and a suction pipe having an ovoid cross section is formed, and a suction hole is formed at a predetermined position in the suction pipe. Then, the ventilation apron 34 is slidably wound along the outer circumference of the suction pipe. Thereafter, the upper nip roller 31a can be actively driven, and the upper nip roller 31 can be driven while being in pressure contact with the venting apron 34, thereby driving the venting apron 34.

The configuration of the suction device is not limited to the configuration for driving the fan 47a by the motor 47. For example, a pressure reducing pump (vacuum pump) can be used. The vacuum pump may be a rotary pump or a reciprocating pump.

As a pneumatic device, instead of a single nozzle type device, a device having a flute type configuration can be used.

The structure which forms the ventilation apron 34 on an upper side can also be used.

The invention (technical idea) which can be grasped | ascertained from the said embodiment will be demonstrated later.

(1) In the invention according to claim 1 or 6, the suction means includes a duct extending in the longitudinal direction of the machine base of the spinning machine and a suction device connected to the duct.

(2) The invention according to claim 1 or 6, wherein the suction means includes a plurality of ducts extending in the longitudinal direction of the machine base of the spinning machine and a plurality of suction devices connected to the ducts. The detection means is mounted so as to stop the abnormal suction device in accordance with the abnormal detection signal from the abnormality detection means and to improve the suction action of the other suction device connected to the duct connected to the abnormal suction device.

As described above, according to the invention described in claims 1 to 5, the suction pressure of the fiber bundle focusing device can be set and changed so that the quality of the spinning chamber satisfies a desired condition. Further, according to the invention described in claim 6, it is possible to spin a yarn of a certain quality by applying an appropriate fiber bundle focusing action to the fiber bundle focusing device from the start of winding to the end.

Claims (6)

A spinning machine comprising a fiber bundle concentrator provided downstream of a final delivery roller pair of the drafting portion to focus the fiber bundles drafted by the drafting portion, The fiber bundle concentrator comprises a sending unit having a nip roller, a suction unit having a suction hole formed to extend at least toward an upstream side of the nip point of the sending unit with respect to the moving direction of the fiber bundle, and at the same time the And a ventilation member rotating along the suction portion, and suction means capable of arbitrarily setting and changing the suction pressure acting on the suction portion. The method of claim 1, wherein the suction means is driven by changing the magnitude of the suction pressure so as to correspond to the number of times> number of times> number of times of the number of times, corresponding to the number of times, the number of times, and the number of times of the spinning chamber. Spinning machine. 3. The suction device according to claim 1 or 2, wherein the suction means is driven to be controllable to change the suction pressure by a control means, and the control means is configured to automatically set an appropriate amount of suction pressure in response to the spinning condition. Spinning machine, characterized in that. 3. A suction tube according to claim 1 or 2, wherein said suction portion is provided with a suction tube having suction holes corresponding to each spindle, and said suction tube is connected to a duct maintained under negative pressure by a plurality of suction apparatuses. Spinning machine. 5. The spinning machine according to claim 4, wherein the duct connected to the suction pipe is formed separately from the pneumatic duct. A feeding part having a nip roller, a suction part having a suction hole formed to extend at least toward an upstream side of the nip point of the sending part with respect to the moving direction of the fiber bundle, and a ventilation member configured to rotate the feeding part and at the same time And a suction means for arbitrarily setting and changing a suction pressure acting on the suction part, the fiber being provided downstream of the final delivery roller pair of the drafting part to focus the fiber bundle drafted by the drafting part. Using a spinning machine that includes a concentrator, Spinning method in which the suction pressure is maximized when the actual winding amount to bobbin reaches approximately 30% of the full bobbin.