JP2003113540A - Apparatus for converging fiber bundle in spinning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for converging a fiber bundle, with which a driving roller and a suction part are unitized for a plurality of spindles of fixed number, assembly and maintenance or change of ventilation aprons are simplified and which can be actualized by the simple remodeling of existing spinning machine. SOLUTION: A revolving shaft 34 is formed in fixed length corresponding to four spindles and turning force of a front bottom roller 12 is transmitted through an intermediate gear 42 to a gear 40 formed at the center. The revolving shaft 34 has a bottom nip roller 34a, on which a part of the ventilation apron 33 is fixed for winding and hanging, at a position corresponding to each spindle. The suction part 32 is extended in parallel with the revolving shaft 34, equipped with suction holes 44a and 45a corresponding to each spindle and with suction pipes 44 and 45 having sliding and guiding faces 44b and 45b for winding and hanging a part of the ventilation apron 33 in a state of covering the suction holes 44a and 45a. The suction holes 44a and 45a are arranged at the upstream side and the downstream side with the nip point of a pair of nip rollers between.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber bundle collecting device, and more particularly, to a fiber bundle in a spinning machine which is arranged downstream of a draft device (draft part) of a spinning machine and collects the fiber bundle drafted by the draft device. The present invention relates to a focusing device.

[0002]

2. Description of the Related Art As a fiber bundle converging device of this type, German Patent Application Publication DE 197008410A1 discloses downstream of a final roller pair 71 constituting a draft device as shown in FIGS. 10 and 11 (a) and (b). Is provided with a pair of delivery rollers 73 having a porous apron 72 that forms a fiber bundle transport surface, and an air suction device 74 that applies a suction airflow to the transport surface of the porous apron 72. In this device, the porous apron 7 is guided through a slot formed in an apron guide 75 that guides the porous apron 72.
The suction airflow acts on the second transport surface.

A pair of delivery rollers 73a around which the porous apron 72 is wound are supported in a cantilever state by a support portion 76 via a support shaft 77, and a rotary shaft 78 arranged in parallel with the front bottom roller 71a. It is adapted to be rotated by friction with the friction roller portion 78a. Friction roller section 7
The frictional force against 8a is secured by the pressing force of the delivery roller 73b which is supported by the weighting arm and is pressed against the porous apron 72 at a position corresponding to the delivery roller 73a.

[0004]

By adding the fiber bundle concentrating device to the front side of the draft device, that is, by converging the fiber bundle before twisting on the downstream side in the fiber bundle moving direction of the draft device, High quality yarn can be spun with less fluff.

However, in the above-mentioned conventional apparatus, since the pair of delivery rollers 73 is driven, the delivery roller 73a is pressed against the friction roller portion 78a provided on the rotary shaft 78 arranged in parallel with the front bottom roller 71a. You need power. Then, the delivery roller 73a is cantilevered to support the spindle 7.
Since it is supported by 7, the bending stress acts on the support shaft 77 when the pressing force acts on the delivery roller 73a.

In order to efficiently secure the frictional force between the delivery roller 73a and the friction roller portion 78a by the pressing force of the delivery roller 73b, the delivery roller 73b, the delivery roller 73a and the friction roller portion 78a have their rotation centers. Must be placed so that they are on a straight line. As a result, the degree of freedom in the arrangement positions of the delivery rollers 73a and 73b and the rotary shaft 78 is reduced.

Further, since the rotary shaft 78 is driven by the motor provided at the gear end of the machine base through the gear train, it is difficult to manufacture the spinning machine at the level of modification of the conventional machine.
It is necessary to newly change the configuration of the spinning machine base such as the layout of the draft device. Of the pair of delivery rollers 73, the delivery roller 73a around which the porous apron 72 is wound is attached to the rotation shaft 78.
If it is formed, the space for disposing the fiber bundle collecting device can be reduced. However, the porous apron 72 is more easily worn than the middle apron of the draft device, and the replacement cycle is relatively short. Therefore, the rotating shaft 7 extending over the entire length of the machine base
When the porous apron 72 is placed in the state where it is inserted in 8,
There is a problem that it takes time to replace the porous apron 72.

The present invention has been made in view of the above problems, and a first object of the present invention is to unitize a drive roller and a suction portion constituting a fiber bundle concentrating device for each of a predetermined number of plural weights. It is an object of the present invention to provide a fiber bundle focusing device that can be easily assembled, maintained, or replaced with a ventilation apron.
A second object of the present invention is to provide a fiber bundle focusing device for a spinning machine, which can be realized by a simple modification of a spinning machine equipped with a conventional draft device.

[0009]

In order to achieve the first object, an apparatus according to the invention of claim 1 is provided downstream of a final delivery roller pair of a draft part of a spinning machine and includes a nip roller. A delivery part, a suction part having a suction hole provided so as to extend at least upstream in the moving direction of the fiber bundle with respect to the nip point of the delivery part, and constitutes the delivery part and along the suction part. It is equipped with a ventilation apron that is rotated. The rotary shaft has a rotary force transmitting portion for transmitting the rotary force of the drive source, is formed to have a predetermined length corresponding to a plurality of weights, and a drive in which a part of the ventilation apron is wound around a position corresponding to each weight. It has a roller portion and has supported portions supported by a supporting portion provided on the machine frame at a plurality of locations. The suction means is provided with a suction pipe extending in parallel with the rotation axis, provided with the suction holes corresponding to the respective weights, and having a sliding surface around which a part of the ventilation apron is wound so as to cover the suction holes. ing.

Therefore, according to the present invention, since the rotary shaft for rotating the nip roller and the suction means for exerting a suction action on the drafted fiber bundle are constituted in units of a plurality of weights, assembly, maintenance, or a ventilation apron. Can be easily replaced. The rotating shaft is formed to have a predetermined length, and the rotational force of the drive source is transmitted through the rotational force transmitting portion. Since the rotating shaft is supported by the plurality of supported parts, even if the driving roller part is pressed by the nip roller on the driven side via the ventilation apron, the bending stress is not excessively applied to the rotating shaft.

According to a second aspect of the present invention, in the first aspect of the invention, the rotational force transmitting portion is a friction roller. Therefore, in the present invention, the structure is simple and the cost is low as compared with the case where the rotational force transmitting portion is a gear.

According to a third aspect of the invention, in the first aspect of the invention, the rotational force transmitting portion is a gear. Therefore, in the present invention, as compared with the case where the rotational force transmitting portion is a friction roller, it is not necessary to press the rotational force transmitting portion against the drive source side with a large force, and the degree of freedom in the arrangement position is increased, and the structure is improved. Will be easier. In addition, the structure is simple as compared with the case where the rotational force transmission unit is a winding transmission mechanism.

Further, in order to achieve the second object, the invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the drive source is a front bottom roller. . In the present invention, since the drive source is the front bottom roller, it is not necessary to newly provide a drive source for driving the rotary shaft on the spinning machine stand, so that the structure is simple and the manufacturing cost is low.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the suction means is connected to a suction duct provided on a spinning machine stand to generate a negative pressure. A connection pipe that acts on the suction pipe is provided, and the suction pipe is detachably attached to the connection pipe.

Therefore, according to the present invention, the suction pipe extending parallel to the rotation axis can be removed from the connecting pipe which is connected to the suction duct and acts a negative pressure on the suction pipe. Maintenance becomes easier.

According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the supported portion is formed so as to be fitted to the supporting portion with one touch. There is. Therefore, in the present invention, the attachment and detachment of the rotary shaft becomes easier.

According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, the supported portions are provided at both ends of the rotary shaft, respectively. Therefore, according to the present invention, assembling of the supported portion becomes easier as compared with the case where the supported portion is provided in the middle of the rotary shaft. Also,
By sharing the supporting portions that support the supported portions of the adjacent rotating shafts facing each other, the number of supporting portions can be reduced and the manufacturing cost can be reduced.

The invention according to claim 8 is the invention according to claim 7, wherein the supported portion is attached to the rotary shaft via a bearing and serves as a support portion for supporting an end portion of the suction pipe. It has the function of. Therefore, in the present invention, it becomes easy to position the drive roller portion provided on the rotary shaft and the suction hole provided in the suction pipe at an appropriate position.

According to a ninth aspect of the invention, in the eighth aspect of the invention, the supported portion is an end plug that closes the open end of the suction pipe. Therefore, in the present invention, the end portion of the suction pipe on the side far from the negative pressure source is closed by the end plug as the supported portion even if it is not closed at the time of manufacturing the suction pipe. Become.

According to a tenth aspect of the present invention, in the invention according to any one of the first to ninth aspects, a part of the suction means functions as a cover of the rotational force transmitting portion. , Is arranged on the front side of the rotational force transmitting portion. Therefore, according to the present invention, it becomes difficult for the cotton fly or the like to be deposited on the rotational force transmitting portion.

According to an eleventh aspect of the present invention, in the invention according to any one of the first to tenth aspects, in the suction portion, the suction holes sandwich the nip point, and the suction portion is upstream of the nip point. It is provided so as to be located on both the downstream side and the downstream side. Therefore, in the present invention, in the fiber bundle drafted by the draft part, from the suction holes arranged on the upstream side and the downstream side in the moving direction of the fiber bundle with the nip point of the delivery portion interposed therebetween,
The suction action extends through the ventilation apron. Then, the fiber bundle moves to a position corresponding to the suction hole while being suction-focused. Therefore, even after the fiber bundle passes through the nip point, the fiber bundle moves in a converged state by receiving the suction action, so that a free triangle is hardly formed at the exit of the nip roller. As a result, generation of fluff and cotton drop are suppressed, and the effect of improving the yarn quality is significantly improved.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is embodied in a fiber bundle concentrating device equipped in a spinning machine in units of four spindles will be described below with reference to FIGS. FIG. 1 is a partially cutaway schematic side view showing one side of the draft device, and FIG. 2 omits the top roller side for showing the relationship between the bottom roller of the draft device and the suction portion and bottom nip roller of the fiber bundle collecting device. It is a partial schematic diagram. FIG. 3A is a schematic view of the fiber bundle collecting device as viewed from the fiber bundle drawing direction at the nip point (the front side of the moving direction of the fiber bundle in the draft device).

As shown in FIG. 1, the draft device 11 as a draft part has a three-wire system including a front bottom roller 12, a middle bottom roller 13 and a back bottom roller 14. Front bottom roller 1
2 is supported at a predetermined position with respect to the roller stand 15,
Each of the bottom rollers 13 and 14 of the middle and back is supported by a roller bracket 15 via support brackets 13a and 14a fixed to the roller stand 15 so as to be positionally adjustable in the front-rear direction. The support brackets 13a and 14a are fastened and fixed at predetermined positions by bolts and nuts (both not shown) that pass through elongated holes formed in the roller stand 15. The bottom apron 16 is wound around the bottom tenser 17 and the middle bottom roller 13.

A front top roller 19, a middle top roller 20, and a back top roller 21 are attached to the weighting arm 18, and the front bottom roller 1
2, middle bottom roller 13 and back bottom roller 1
4 are respectively supported at positions corresponding to 4 via a top roller supporting member. Each of the top rollers 19 to 21 is supported as a set of two weights. Front bottom roller 12
The front top roller 19 and the front top roller 19 form a final delivery roller pair of the draft device 11.

A lever 18 is attached to the weighting arm 18.
a is rotatably arranged in a pressurizing position and a releasing position. The lever 18a is the weighting arm 1 shown in FIG.
8 is arranged in a pressurizing position where it abuts against the frame 18b, the pressurizing position (spinning position) for pressing the respective top rollers 19 to 21 supported by the weighting arm 18 toward the bottom rollers 12, 13, 14 side. ) Is held in a locked state. The locked state is released when the lever 18a is rotated from the state shown in FIG. 1 to the upper release position.

As shown in FIG. 1, a fiber bundle collecting device 30 is arranged downstream of the final delivery roller pair of the draft device 11. The fiber bundle collecting device 30 includes a nip roller pair 31,
A suction unit 32 as a suction unit and a ventilation apron 33 are provided. The nip roller pair 31 is composed of a bottom nip roller 34a as a driving roller portion formed on a rotary shaft 34 arranged in parallel with the front bottom roller 12, and a top nip roller 31a which is pressed against the bottom nip roller 34a via a ventilation apron 33. It is configured.

The fiber bundle collecting device 30 of this embodiment is
As shown in FIG. 3A, the top nip roller 31a is attached to the weighting arm 18 via the support member 35 (shown only in FIG. 1) every two spindles like the top rollers 19 to 21 of the draft device 11. It is supported. In this embodiment, the support member 35 is the front top roller 1
It is formed integrally with the support member of 9.

On the other hand, on the bottom side of the fiber bundle collecting device 30,
Half of the weights arranged between the roller stands 15 of the draft device 11, four weights in this embodiment, are configured as one unit. At a middle position of the roller stand 15 arranged at a predetermined interval in the machine base longitudinal direction, as shown in FIG. 2, a support beam 36 extending in the machine base longitudinal direction supports the base end side of the roller stand 15. An arm 37 is provided, and the rotating shaft 34 is supported between the roller stand 15 and the support arm 37.

As shown in FIG. 3B, the rotary shaft 34 is formed to have a predetermined length corresponding to a plurality of weights (four weights in this embodiment), and bearings 38 are fixed to both ends thereof. Then, the bearing 38 is fitted to the end plug 39 as the supported portion, and as shown in FIG. 3A, the end plug 39 is a support portion provided on the roller stand 15 and the support arm 37 at the fitting portion 39a. The rotation shaft 34 is rotatably supported between the roller stand 15 and the support arm 37 by being supported by 15a and 37a. Support part 1
5a and 37a are formed so that two end plugs 39 can be supported, and can also support the end plugs 39 attached to the ends of the adjacent rotating shafts 34.

The supporting portion 15a is composed of a block fixed on the roller stand 15, and as shown in FIG. 6 (a), the fitting concave portion 15 extending obliquely upward to the front side of the machine base.
b and 15c. As shown in FIG. 6B, the support portion 37a also has a fitting recess 37b extending obliquely upward and forward of the machine base. Further, the supported portion (end plug 39) has a fitting portion 39a capable of fitting with the fitting concave portions 15b, 37b, and the supporting portions 15a, 3 at the fitting portion 39a.
It is formed so that it can be fitted to 7a with one touch.
The fitting concave portion 15c of the supporting portion 15a is for supporting the front bottom roller 12.

A gear 40 as a rotational force transmitting portion for transmitting the rotational force of the drive source is provided at the center of the rotary shaft 34 in the longitudinal direction. The gear 40 is formed integrally with the rotating shaft 34. In this embodiment, the front bottom roller 12 is used as a drive source of the rotary shaft 34, and as shown in FIG. 2, the front bottom roller 12 is formed with a gear portion 12a at a position facing the gear 40. As with the support arm 37, a support arm 41 having a base end side fixed to the support beam 36 rotatably supports an intermediate gear 42 that meshes with the gear portion 12a and the gear 40. That is, the rotational force of the front bottom roller 12 is
It is transmitted to the rotary shaft 34 via a, the intermediate gear 42, and the gear 40.

As shown in FIG. 1, a suction duct 43 is arranged on the spinning machine base so as to extend in the longitudinal direction (direction perpendicular to the paper surface of FIG. 1). The suction unit 32 has a rotating shaft 34.
Suction pipes 44 and 45 extending in parallel with the suction duct 4
3 and a connecting pipe 46 for connecting the suction pipes 44 and 45 with negative pressure. The connecting pipe 46 partially plays a role of a cover for the gear 40 and the intermediate gear 42,
It is arranged on the front side of the gear 40 and is connected to the suction duct 43 on the proximal side via a bellows-shaped connecting pipe 47. FIG. 8 is a view showing a portion corresponding to the connection pipe 46 in a state where the connection pipe 46 is removed in FIG. It can be seen from FIGS. 3A and 8 that the connecting pipe 46 is arranged so as to serve as a cover for the gear 40 and the intermediate gear 42. The connecting pipe 47 is arranged not in a straight line but in a bent state, and applies a force to the connecting pipe 46 in a direction intersecting the extending direction thereof.

As shown in FIG. 7, fitting holes 46a and 46b are formed at the tip of the connecting pipe 46 so that the suction pipes 44 and 45 can be removably attached. The first ends of the suction pipes 44 and 45 are detachably attached to the left and right sides of the connection pipe 46, respectively.
The second end of 45 is fitted to the end plug 39.
In addition, in FIG. 7, the suction pipes 44, 45 are provided on one side of the connection pipe 46.
It is a perspective view which shows the state which attached.

As shown in FIG. 2, the suction pipe 44 slides with a slit-shaped suction hole 44a extending upstream in the moving direction of the fiber bundle (fleece) F with the nip point of the bottom nip roller 34a interposed therebetween. It has a guide surface 44b. The suction pipe 45 has a slit-shaped suction hole 4 extending downstream.
It has a sliding guide surface 45b formed with 5a. And
As shown in FIGS. 2 and 4, the suction pipe 44 is disposed upstream of the nip point of the bottom nip roller 34a in the moving direction of the fiber bundle, and the suction pipe 45 is disposed downstream thereof. In addition, in FIG. 2, in order to make the suction holes 44a and 45a easy to see, the ventilation apron 33 is shown by a chain line. Further, as shown in FIG. 3A, a regulation guide 45 c for preventing lateral displacement of the ventilation apron 33 is provided on the sliding guide surface 45 b of the suction pipe 45, and the end guide 39 of the ventilation apron 33 or the connecting pipe 46. It is projected at a position corresponding to the side opposite to and the side opposite to.

As shown in FIG. 5, in the end plug 39, in addition to the fitting hole 39b into which the bearing 38 is fitted, a fitting recess 39c into which the suction pipe 44 and the suction pipe 45 are fitted,
39d is formed. The second ends of the suction pipe 44 and the suction pipe 45 are fitted into the fitting recesses 39c and 39d, so that the suction pipes 44 and 45 are held in an appropriate positional relationship.

The suction pipe 44 is formed in such a shape that the ventilation apron 33 can be guided so as to reach the vicinity of the nip point between the front bottom roller 12 and the front top roller 19. The suction pipe 45 is arranged so that the fiber bundle F sent out from the ventilation apron 33 turns at a certain fleece angle. The fleece angle means a line segment that connects the center of curvature of the arc surface that guides the fiber bundle F to the pull-out position after passing through the nip point of the fiber bundle (fleece) F, and the curvature center and the fiber bundle. It means the angle formed by the line segment connecting the lead-out point of F. A part of the ventilation apron 33 is wound around the suction pipes 44 and 45 and a part of the ventilation apron 33 contacts the bottom nip roller 34a, and the sliding guide surface 44 is rotated as the bottom nip roller 34a rotates.
It is adapted to be rotated while sliding along b and 45b. In this embodiment, the ventilation apron 33 is made of a woven fabric that can ensure appropriate ventilation.

As shown in FIG. 2, the width of the suction hole 44a located upstream of the nip point is smaller than that of the suction hole 4 located downstream.
It is formed wider than the width of 5a. Downstream suction hole 45
The width a is formed such that its width becomes narrower toward the downstream side.

Of the suction holes 44a and 45a, the suction hole 44a on the upstream side is formed so as to extend obliquely with respect to the moving direction of the ventilation apron 33 (vertical direction in FIG. 2), and the suction hole 45a on the downstream side is vented. It is formed so as to extend in the same direction as the moving direction of the apron 33.

As shown in FIG. 1 and FIG. 3A, the draft device 1 is provided near the lower part of the suction pipe 45 when the yarn is broken.
The tip ends of the suction nozzles 48 of the single type pneumatic device having the function of sucking the fiber bundles F sent from No. 1 are respectively arranged. The base end of the suction nozzle 48 is connected to the suction duct 43.

Next, the operation of the device configured as described above will be described. When the spinning machine is operated, the fiber bundle F moves to the bottom rollers 12 to 14 of the draft device 11 and the top roller 1 of the draft device 11.
After being drafted by passing between 9 and 21, it is guided to the fiber bundle focusing device 30. The nip roller pair 31 is rotated slightly faster than the surface speed of the front rollers 12 and 19, and the fiber bundle F passes the nip point of the nip roller pair 31 in an appropriate tension state, and then is turned and twisted toward the downstream side. Moving.

When the nip roller is in operation, the suction duct 4
The suction action of 3 extends to the suction pipes 44 and 45 through the connecting pipe 47 and the connecting pipe 46, and the suction action of the suction holes 44a and 45a formed in the sliding guide surfaces 44b and 45b passes through the ventilation apron 33 to the fibers. Spans bundle F. Then, the fiber bundle F moves to a position corresponding to the suction holes 44a and 45a while being suction-focused.

In the structure in which the suction holes (slits) are arranged only on the upstream side of the nip point as in the conventional apparatus, the fiber bundle F once focused before reaching the nip point spreads after passing the nip point, As shown in FIG. 9B, a free triangle T is formed at the exit of the nip roller pair 31. Therefore, the effect of suppressing the release of the fibers from both ends of the fiber bundle F after passing through the nip point is weak and fuzz occurs. However, in this embodiment, since the suction holes 44a and 45a are present on the upstream side and the downstream side across the nip point of the nip roller pair 31, the fiber bundle F is subjected to the suction action even after passing the nip point and is converged. Move in the open state. And in FIG.
As shown in (a), a free triangle is hardly formed at the exit of the nip roller pair 31. As a result, the liberation of fibers from both ends of the fiber bundle F after passing through the nip point is suppressed, the generation of fluff and the falling of cotton are suppressed, and the effect of improving the yarn quality is significantly improved.

Further, the focusing effect of the suction holes 45a provided on the downstream side of the nip point is also propagated to the upstream side of the nip point to some extent, and the spread of the fiber bundle F before reaching the nip point is suppressed.

This embodiment has the following effects. (1) A rotary shaft 34 that rotates the bottom nip roller 34a and a suction unit 32 that exerts a suction action on the drafted fiber bundle F are configured as a unit for each of a plurality of weights.
4 is supported by a plurality of supported parts (end plugs 39). Therefore, it is possible to easily assemble, maintain, or replace the ventilation apron 33. Further, even if the bottom nip roller 34a is pressed by the nip roller (top nip roller 31a) on the driven side via the ventilation apron 33, an excessive bending stress does not act on the rotating shaft 34.

(2) The gear 40 is a rotational force transmitting portion for transmitting the rotational force of the drive source to the rotary shaft 34. Therefore, as compared with the case where the rotational force transmitting portion is a friction roller, it is not necessary to press the rotational force transmitting portion against the drive source side with a large force, the degree of freedom in the arrangement position is increased, and the structure is simplified. . In addition, the structure is simple as compared with the case where the rotational force transmission unit is a winding transmission mechanism.

(3) The drive source for rotating the rotary shaft 34 is the front bottom roller 12. Therefore, the rotary shaft 34
Since it is not necessary to newly provide a drive source for driving the spinning machine on the spinning machine base, the structure is simplified and the manufacturing cost is reduced.

(4) The suction means (suction part 32) is provided with a connection pipe 46 which is connected to the suction duct 43 provided on the spinning machine stand and acts a negative pressure on the suction pipes 44, 45. 45 is detachably attached to the connection pipe 46. Therefore, since the suction pipes 44 and 45 extending parallel to the rotary shaft 34 can be removed from the connection pipe 46, the ventilation apron 33 is replaced and the suction pipes 44 and 4 are replaced.
Maintenance work such as 5 becomes easier. Further, when the suction pipes 44, 45 are worn due to friction with the ventilation apron 33, it is necessary to replace the suction pipes 44, 45, but the suction pipes 44, 4 that are worn without replacing the entire suction portion 32.
If only 5 is replaced, the replacement work is easy and the cost is low.

(5) The supported portion (end plug 39) is formed so that it can be fitted to the supporting portions 15a and 37a with one touch. Therefore, attachment / detachment of the rotary shaft 34 becomes easier. Further, since the supporting portions 15a and 37a have the fitting concave portions 15b and 37b extending obliquely upward to the front side of the machine base, the supported portion (end plug 39) of the rotating shaft 34 has the fitting concave portions 15b and 37b. Support part 15 in a state of being fitted to
Since it is securely held by the a and 37a, the assembling of the rotary shaft 34 and the suction portion 32 to the spinning machine stand becomes easier.

(6) The supported portions are provided on both ends of the rotary shaft 34, respectively. Therefore, the supported portion is rotated by the rotary shaft 34.
It becomes easier to assemble the supported portion as compared with the case where it is provided midway. Further, by sharing the support portion that supports the supported portions (end plugs 39) facing each other of the adjacent rotary shafts 34, the number of the support portions 37a can be reduced, and the manufacturing cost of the fiber bundle focusing device 30 can be reduced. it can.

(7) The supported portion (end plug 39) is attached to the rotating shaft 34 via the bearing 38 and has a function as a supporting portion for supporting the end portions of the suction pipes 44, 45. Therefore, it becomes easy to position the drive roller portion (bottom nip roller 34a) provided on the rotary shaft 34 and the suction holes 44a and 45a provided on the suction pipes 44 and 45 at appropriate positions.

(8) The supported parts are suction pipes 44, 45
It is composed of an end plug that closes the open end of the. Therefore, the end portions of the suction pipes 44, 45 on the side far from the negative pressure source are closed by the end plug 39 as the supported portion even if the suction pipes 44, 45 are not closed at the time of manufacturing the suction pipes 44, 45. The manufacture of 45 is simplified.

(9) The suction means (suction portion 32) is arranged in front of the rotation force transmission portion so that a part of the suction means serves as a cover of the rotation force transmission portion (gear 40). Therefore, it becomes difficult for dust and the like to accumulate on the rotational force transmitting portion.

(10) The suction part 32 has suction holes 44a, 4
5a is provided so as to sandwich the nip point of the nip roller pair 31 and be located on both the upstream side and the downstream side of the nip point. Therefore, even after the fiber bundle passes through the nip point, the fiber bundle moves in a converged state by receiving the suction action, so that a free triangle is hardly formed at the outlet of the bottom nip roller 34a. As a result, generation of fluff and cotton drop are suppressed, and the effect of improving the yarn quality is significantly improved.

(11) The focusing effect of the suction holes 45a provided on the downstream side of the nip point propagates to the upstream side of the nip point to some extent, and the spreading of the fiber bundle F until reaching the nip point is suppressed, and The effect is improved.

(12) The ventilation apron 33 is made of woven cloth. Therefore, without having to bother to open a small hole in the belt forming the ventilation apron 33,
By selecting a woven fabric that can ensure appropriate breathability,
The ventilation apron 33 can be manufactured at low cost.

(13) The end plug 39 has the fitting portion 3
Reference numeral 9a denotes fitting recesses 15b and 37b of the support portions 15a and 37a.
And is held at a predetermined position by the urging force applied from the connecting pipe 47 to the connecting pipe 46. Therefore, the fiber bundle F can be stably sucked from the suction holes 44a and 45a, and the yarn quality is stabilized.

The embodiment is not limited to the above, but may be configured as follows, for example. The rotation shaft 34 and the suction portion 32 are not limited to the configuration in which four weights are one unit, and the number of weights between the roller stands 15 (for example, eight weights) may be one unit. In this case, the number of parts of the suction unit 32 and the rotary shaft 34 required for one spinning machine is reduced, and the number of the connecting pipes 47 that connect the suction duct 43 and the suction unit 32 can be reduced. Less. Further, the roller stand 15 is generally arranged at an installation interval of spring pieces constituting the machine frame of the spinning machine, and the suction duct 43 and the like are often constructed by connecting those having a length corresponding to the interval. Therefore, by configuring the suction unit 32 and the rotary shaft 34 to correspond to their lengths, it becomes easy to carry out packaging such as transportation.

The two weights may be configured as one unit, or the number of weights between the roller stands 15 may be divided into different numbers (for example, 6 weights and 2 weights) without correspondingly setting all the units to the same weight. You may provide two types of units.
Further, the rotation shaft 34 may be formed to have a length corresponding to the number of weights arranged so as to straddle the roller stand 15.

The position of the supported portion provided on the rotary shaft 34 is not limited to the both ends of the rotary shaft 34, and may be provided at the intermediate portion. However, the suction pipes 44 and 45 should be provided at both ends.
It will be easier to avoid interference with.

The supported portion provided on the rotary shaft 34 is 2
Not limited to the location, three or more locations may be provided. When the length of the rotating shaft 34 is set to correspond to the length of the roller stand 15, it is preferable that the supported portions supported by the roller stand 15 are provided at both ends, and the supported portion is also provided at the intermediate portion.

As a method of fixing the supported portion (end plug 39) to the supporting portions 15a and 37a, the supported portion (end plug 39) is supported via the connecting pipe 46.
Instead of pressing the fitting recesses 15b and 37b of the 37a, screwing may be used. In addition, the support portion 15
It is also possible to provide a snap portion on one of the a, 37a and the supported portion (end plug 39), and to provide an engaging portion having a shape such that the snap portion can be gripped on the other, and to fix it at a predetermined position.

The extension direction of the suction holes 44a and 45a is such that the suction holes 44a on the upstream side extend obliquely to the moving direction of the ventilation apron 33, and the suction holes 45a on the downstream side extend in the moving direction of the ventilation apron 33. Not limited to For example, both suction holes 44a and 45a may be in the same direction as the moving direction of the ventilation apron 33. In addition, both suction holes 44a,
45a may be inclined with respect to the moving direction of the ventilation apron 33.

The widths of the suction holes 44a and 45a may be constant. The suction pipes 44 and 45 forming the suction portion 32 may not be formed separately, but both suction pipes 44 and 45 may be integrated and formed in an arc shape in which the side facing the top nip roller 31a is open. Good.

The suction pipes 44, 45 may be formed in a shape in which the end portions on the side opposite to the side facing the connection pipe 46 are closed. In this case, the end plug 39 is the suction pipe 4
A structure having a fitting hole 39b into which the bearing 38 is fitted and a fitting portion (hole) into which the ends of the suction pipes 44 and 45 are fitted without consideration of hermetically sealing the ends of the suction pipes 44 and 45. This simplifies manufacturing.

The ventilation apron 33 may be formed of a knitted fabric instead of the woven cloth. In this case as well, the ventilation apron 33 can be manufactured at a low cost, without requiring the trouble of opening a small hole in the belt constituting the ventilation apron 33 as in the case of the woven cloth. Further, due to the stretchability of the knitted fabric, the ventilation apron 33 is rotated in an appropriate tension state without providing a tension device.

Instead of forming the ventilation apron 33 with a woven cloth or knitted fabric, a large number of holes may be formed in a belt made of rubber or resin having elasticity. The gear 40 is not limited to the one formed by engraving on the rotary shaft 34 and integrally formed, and a separately formed gear may be fitted and fixed to the rotary shaft 34.

The rotational force transmitting portion is not limited to the gear 40, but may be a friction roller, or a sprocket or a toothed pulley that constitutes a winding transmission device. When the rotational force transmitting portion is a friction roller, a high friction pressing roller having a high friction surface is provided instead of the intermediate gear 42. When the friction roller is used, the structure is simple and the cost is low as compared with the case where the gear is used.

○ Suction pipe 4 constituting the suction unit 32
4, 45 may be formed integrally with the connecting pipe 46. The suction unit 32 is not limited to the configuration having the suction holes 44a and 45a on the upstream side and the downstream side with the nip point of the fiber bundle F interposed, and may have the configuration having the suction hole 44a only on the upstream side with the nip point interposed. Good.

As the pneumatic device, a flute type configuration may be adopted instead of the single nozzle type. -Instead of connecting the suction nozzle 48 of the pneumatic device to the suction duct 43, the connection pipe 46 may be branched.

A negative pressure source of the suction unit 32 (suction duct 4
3) and the negative pressure source of the pneumatic device may be provided independently. ○ Instead of the front bottom roller 12 as a drive source,
A drive shaft that is driven via a gear train by a motor provided at the gear end of the machine base may be newly provided.

Not limited to the drafting device of the spinning machine, it may be applied to the drafting device of another spinning machine. The invention (technical idea) understood from the above embodiment will be described below.

(1) In the invention according to any one of claims 1 to 11, the support portion has a fitting recess extending obliquely upward and frontward of the spinning machine stand. (2) A ring spinning machine equipped with the fiber bundle focusing device according to any one of claims 1 to 11 and (1).

[0073]

As described in detail above, the first to the first aspects of the invention are described.
According to the first aspect of the present invention, the drive roller and the suction portion that configure the fiber bundle collecting device are unitized for each of a predetermined number of plural weights, and assembly, maintenance, or replacement of the ventilation apron can be easily performed. Further, according to the invention described in claims 4 to 11, it can be realized by a simple modification of a spinning machine provided with a conventional draft device.

[Brief description of drawings]

FIG. 1 is a partially cutaway schematic side view of an embodiment.

FIG. 2 is a partial schematic view showing a relationship between a suction unit and a bottom nip roller.

FIG. 3A is a partial schematic view of the fiber bundle collecting device as seen from the front in the fiber bundle moving direction, and FIG. 3B is a front view of a rotating shaft.

FIG. 4 is a partially enlarged view of FIG.

FIG. 5 is a schematic perspective view of an end plug.

FIG. 6A is a schematic side view showing a support portion of a roller stand, and FIG. 6B is a schematic side view showing a support portion arranged in the middle of the roller stand.

FIG. 7 is a partial perspective view of a suction unit.

FIG. 8 is a partial schematic view of a state in which a connecting pipe corresponding to FIG. 3A is removed.

FIG. 9A is a partial schematic view showing the operation, and FIG. 9B is a schematic view showing the operation when there is no downstream suction pipe.

FIG. 10 is a schematic side view of the related art.

11A is a front view of a conventional technique, and FIG. 11B is a sectional view taken along line BB of FIG.

[Explanation of symbols]

12 ... Front bottom roller as a driving source, 15a,
37a ... Supporting part, 30 ... Fiber bundle collecting device, 31 ... Nip roller pair as sending part, 31a ... Top nip roller as nip roller, 32 ... Suction part as suction means, 33 ... Ventilation apron, 34 ... Rotating shaft, 34a ... Bottom nip rollers as nip rollers, 38 ... Bearings, 3
9 ... End plugs as supported parts, 40 ... Gears as rotational force transmitting parts, 43 ... Suction ducts, 44, 45 ... Suction pipes, 44a, 45a ... Suction holes, 46 ... Connection pipes, F ...
Fiber bundle.

Claims (11)

[Claims] 1. A delivery part provided downstream of a final delivery roller pair of a draft part of a spinning machine and provided with a nip roller, and extending at least upstream of a nip point of the delivery part in a moving direction of a fiber bundle. A fiber bundle converging unit for concentrating the fiber bundles drafted by the draft part, comprising a suction unit having a suction hole provided in the suction unit, and a ventilation apron that constitutes the delivery unit and is rotated along the suction unit. A device having a rotational force transmitting portion for transmitting the rotational force of a drive source, formed to have a predetermined length corresponding to a plurality of weights, and a part of the ventilation apron being wrapped around a portion corresponding to each weight. A rotary shaft having a driven roller portion and a supported portion supported by a support portion provided on the machine frame at a plurality of positions, extending in parallel with the rotary shaft, and the suction holes corresponding to the weights. Prepare for Fiber bundle collecting device for a spinning machine comprising a suction means having a suction pipe having a sliding surface portion is wound of the apron so as to cover the suction holes. 2. The fiber bundle collecting device for a spinning machine according to claim 1, wherein the rotational force transmitting portion is a friction roller. 3. The rotating force transmitting portion is a gear.
A fiber bundle concentrating device in the spinning machine according to. 4. The fiber bundle focusing device according to claim 1, wherein the drive source is a front bottom roller. 5. The suction means comprises a connecting pipe connected to a suction duct provided on a spinning machine stand to apply a negative pressure to the suction pipe, and the suction pipe is detachably attached to the connecting pipe. The fiber bundle focusing device according to any one of claims 1 to 4. 6. The support part is formed so that it can be fitted to the support part with one touch.
A fiber bundle concentrating device in the spinning machine according to any one of items 1. 7. The fiber bundle focusing device for a spinning machine according to claim 1, wherein the supported portions are provided at both ends of the rotary shaft, respectively. 8. The fiber bundle in a spinning machine according to claim 7, wherein the supported portion is attached to the rotary shaft via a bearing and has a function as a supporting portion that supports an end portion of the suction pipe. Focusing device. 9. The fiber bundle collecting device for a spinning machine according to claim 8, wherein the supported portion is an end plug that closes an open end of the suction pipe. 10. The method according to claim 1, wherein a part of the suction means is arranged on the front side of the rotational force transmitting portion so as to serve as a cover of the rotational force transmitting portion. A fiber bundle collecting device for a spinning machine according to the item. 11. The suction portion is provided so that the suction hole is located on both the upstream side and the downstream side of the nip point with the nip point sandwiched therebetween. The fiber bundle focusing device according to one item.