JPH10273832A - Draft apparatus for spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the position of a second bottom roller changeable without changing a free gage in a draft apparatus used for spinning of filament. SOLUTION: Draft of a fiber bundle is carried out in a draft apparatus in which a bottom apron is entrained about space between a bottom ten server 11 and second and third bottom rollers 3 and 4. The roller shaft 3a of the second bottom roller 3 is constituted so as to be dividable into plural parts and each divided unit shaft is movably supported in a direction perpendicular to longitudinal direction of machine table through a supporting bracket 7 to a roller stand 6. When plural raw materials in which proper draft conditions are different are simultaneously spun, roller shafts 3a are divided and integrally rotatably connected through a connecting member providing a universal joint at both ends. Then, the position of the roller shaft 3a positioned on both side while putting the connecting member therebetween is arranged. The position of a weight roller 28 is adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a draft device for a spinning machine.

[0002]

2. Description of the Related Art In a drafting device used for spinning long fibers (for example, wool), a pair of aprons is wound between a tensor and a driving roller, and an upper and lower surface of the apron is supported at an intermediate portion of a bottom apron. To provide a muscle roller
An apparatus has been implemented in which a weight roller is provided at an intermediate portion of a top apron at a position corresponding to a streak roller and in contact with a lower upper surface of the apron.

[0003] As a draft device provided with a weight roller in the middle of an apron, the device shown in FIG. 13 is implemented. That is, an apron device 72 disposed behind the front bottom roller 71a and the front top roller 71b.
Is the top cradle 74 above the bottom apron 73
Is arranged. An intermediate bottom roller (second bottom roller) 75 is provided at an intermediate portion of the bottom apron 73 so as to be in contact with the bottom apron 73. The top apron 76 is a top tensor 77 and a top roller 7
It is wound between eight. On both side walls 74a and 74b of the top cradle 74, a cylindrical weight roller 80 is supported on a support shaft 79 fixed at a position corresponding to the second bottom roller 75. And weight roller 8
The top apron 76 is pressurized by its own weight of 0 to ensure an appropriate fiber gripping state. Also, there is known an apron device in which a roller rotatably supported by a support shaft via a bearing is disposed in place of a weight roller, instead of a roller loosely inserted into a support shaft like a weight roller. I have.

[0004] In order to spin out yarn with less yarn unevenness, it is necessary to adjust the apron contact pressure to an appropriate value. Also,
The weight roller 80 and the second bottom roller 75
The middle part of the passing fiber is held down by an appropriate load, and serves to stabilize the high-speed transition state when the fiber is pulled out by the front rollers 71a and 71b.

Japanese Unexamined Patent Publication (Kokai) No. 61-282433 discloses that in a three-wire draft device used in a pneumatic spinning machine, at least a back bottom roller and a middle bottom roller are made independent in units of one or two weights, and It discloses a roller in which each roller and the drive shaft are supported by a housing integrated with each other by a common drive shaft, and the respective housings are fixed so as to be position-adjustable along a yarn traveling path on a frame. A driving force is transmitted from a gear box to each drive shaft of the back bottom roller and the middle bottom roller via a universal joint.

[0006]

Since the weight roller 80 is replaceable in the conventional apparatus, the contact pressure of the apron can be adjusted to some extent by using the weight rollers 80 having different weights. However, in order to draft the fiber in an appropriate state, the nip point NP1 by the front roller and the nip point NP2 by the weight roller 80 and the second bottom roller 75 corresponding to the fiber length distribution of the spun raw material are determined. It is important to set the distance L. There is an optimum distance for each raw material having a different fiber length distribution. Therefore, when the fiber length distribution of the raw material changes, the positions of the weight roller 80 and the second bottom roller 75 should be changed accordingly. In the conventional apparatus, since the distance between the second bottom roller 75 and the third bottom roller 81 is fixed, when changing the distance L, the distance between the nip point NP1 by the front roller and the tip of the apron device 72, that is, the free gauge Gf
Need to be changed. However, increasing the free gauge Gf increases draft unevenness. Therefore, the nip point NP2 by the second roller could not be changed. As a result, in order to spin out raw materials having greatly different fiber length distributions, it was necessary to prepare separate spinning machines.

[0007] In the case of spinning long fiber, production of many kinds and small lots is more demanded. However, in the conventional spinning machine, there is no apparatus capable of simultaneously performing drafting under different drafting conditions with one spinning machine. Accordingly, even when a plurality of types (for example, two types) of which the required production amount is less than half the number of spindles of the spinning machine are produced, it is necessary to operate the spinning machine for the number of times, and the operation rate of the spinning machine is required. Decrease.

In the apparatus disclosed in Japanese Patent Application Laid-Open No. Sho 61-282433, in a three-wire drafting apparatus, a back roller and a middle bottom roller can be moved in a running direction of a yarn, and a front roller and a second roller, or Adjusting the distance between the second roller and the back roller is disclosed. However, there is no description suggesting that the draft device is configured so that one spinning machine has different roller intervals at the same time.

The present invention has been made in view of the above problems, and a first object of the present invention is to provide a drafting device for a spinning machine capable of simultaneously spinning at least two different drafting conditions with one spinning machine. To provide. A second object is to provide a drafting device of a spinning machine used for spinning a long fiber having an apron draft device in which a bottom apron is wound between a bottom tensor, a second and a third bottom roller, and a nip point of a front roller. It is an object of the present invention to provide a drafting device for a spinning machine which can change the position of a second bottom roller in accordance with the fiber length distribution of a raw material without changing the distance (free gauge) between the second bottom roller and the apron.

[0010]

According to the first aspect of the present invention, at least a roller shaft for driving a second bottom roller can be divided into a plurality of shafts. The unit axis is supported movably with respect to the machine in the direction orthogonal to the machine direction,
When each unit shaft is arranged in a state where the axes do not coincide, the unit shafts can be connected to each other via a universal joint.

In order to achieve the second object, the invention according to claim 2 is a drafting device for a spinning machine including an apron draft device in which a bottom apron is wound around a bottom tensor, a second and a third bottom roller. A roller shaft for driving the second bottom roller of the apron draft device is configured to be able to be divided into a plurality, and each of the divided unit shafts can be moved relative to the machine in a direction orthogonal to the longitudinal direction of the machine. In a case where the unit shafts are supported and arranged so that the axis of each unit shaft does not match, the unit shafts can be connected to each other via a universal joint.

According to a third aspect of the present invention, in the second aspect of the present invention, the apron draft device includes a cradle equipped with a top tensor, a second top roller, a third top roller, and a top apron. The mounting position of the top roller can be changed in the longitudinal direction of the cradle.

According to a fourth aspect of the present invention, in the first aspect of the present invention, a roller portion is formed integrally with the roller shaft. According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the unit shafts are formed in the same span, and are arranged in a state where the axes of the unit shafts do not match. In this case, the connecting member for connecting the unit shafts has a length substantially equal to the span of the unit shaft and is equipped with universal joints at both ends.

According to a sixth aspect of the present invention, in the fifth aspect of the invention, the roller shaft is connected to a bottom roller drive shaft via a universal joint means, and the universal joint means and the unit shafts are connected to each other. It is configured to be able to be shared with the connecting member.

According to the first to sixth aspects of the present invention, when operation is performed under draft conditions in which the distance between the front roller and the second bottom roller is partially different, the axis of the unit shaft constituting the second bottom roller is The unit shafts that are not aligned with each other are connected via a universal joint. Therefore, even when the distance between the bottom draft rollers is different, the bottom draft rollers are smoothly rotated.

According to the second aspect of the present invention, the fiber bundle is drafted by the apron draft device in which the bottom apron is wound between the bottom tensor and the second and third bottom rollers. Then, the roller axis of the second bottom roller is set in a direction perpendicular to the longitudinal direction of the machine base so that the distance between the nip point of the front roller and the nip point of the second roller is an appropriate distance corresponding to the fiber length distribution of the raw fibers. It is moved and disposed at a predetermined position. When spinning a plurality of raw materials having different fiber length distributions at the same time, some unit axes are arranged in a state where the axes do not coincide with the other unit axes.
The unit shafts arranged in a state where the axes do not coincide with each other are connected via a universal joint.

According to a third aspect of the present invention, in the second aspect of the invention, when the position of the second bottom roller is changed, the mounting position of the second top roller mounted on the cradle is set at the position of the second bottom roller. Draft is performed in a state where the position is changed to the corresponding predetermined position.

According to a fourth aspect of the present invention, in the first aspect of the present invention, since the roller portion is integrally formed with the roller shaft, the structure is simplified.

According to a fifth aspect of the present invention, in the first aspect of the present invention, when the position of the unit shaft is changed to satisfy a plurality of draft conditions, the roller shaft is changed. Are replaced with connecting members having universal joints at both ends. Since each unit axis is formed in the same span, the position of the unit axis can be easily changed at an arbitrary position.

According to the sixth aspect of the present invention, since the connecting member for connecting the unit shafts and the universal joint for connecting the roller shaft to the bottom roller driving shaft can be shared, one kind of connecting member is prepared. Only storage is convenient.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment in which the present invention is embodied in an apron drafting apparatus for spinning long fibers will be described below with reference to FIGS. As shown in FIG. 1, the draft device 1 includes a front bottom roller 2, a second bottom roller 3, and a third bottom roller 4.
And a four-wire system including a back bottom roller 5. Each of the second, third and back bottom rollers 3 to 5 is provided with support brackets 7 to 9 which are fixed to the roller stand 6 constituting the machine base so as to be adjustable in the front-rear direction.
Is supported through. The support brackets 7 to 9 are fixed to predetermined positions by bolts 7a, 8a, 9a and nuts 7b, 8b, 9b penetrating through long holes (not shown) formed in the roller stand 6.

The bottom apron 10 is wound around a bottom ten server 11 as a bottom tensor, a second bottom roller 3 and a third bottom roller 4.
The bottom ten server 11 is formed in an approximately L-shaped cross section, has a length common to a plurality of weights (for example, common to eight weights), and is disposed in parallel with the bottom roller.

The weighting arm 12 has a frame 13 which is open at the bottom and has an inverted U-shaped cross section. The frame 13 is rotatably supported at its base end by a roller stand 6 via a support shaft 14. ing. Frame 13
Has a front top roller 15 and a third top roller 1
6 and the back top roller 17 are respectively supported at positions corresponding to the front bottom roller 2, the third bottom roller 4, and the back bottom roller 5 via top roller support members (hereinafter simply referred to as support members) 18a to 18c, respectively. ing. Each of the top rollers 15 to 17 is provided as a pair of two weights at both ends of the support shafts 15a to 17a, and the center of the support shafts 15a to 17a is detachably supported by lower portions of the support members 18a to 18c.

A lever 12a is disposed above the frame 13 so as to be rotatable between a pressing position and a releasing position. In a state where the lever 12a is located at the pressing position where it comes into contact with the frame 13 shown in FIG. 1, the frame 13 presses each of the top rollers 15 to 17 supported by the weighting arm 12 toward the bottom rollers 2, 4, and 5. Is held in a locked state at the pressing position (spinning position). When the lever 12a is turned from the state shown in FIG. 1 to the upper release position, the locked state is released.

A long hole 20 is formed in the upper wall 13a of the frame 13.
a, 20b are formed to extend in a direction orthogonal to the axial direction of the top roller, and support members 18b, 18c for supporting the third top roller 16 and the back top roller 17
Are fixed to the frame 13 via bolts 19 fitted in the long holes 20a and 20b. Support members 18b, 18
c has a female screw portion (not shown) formed on the upper portion thereof, and a bolt 19 is screwed into the female screw portion to form a frame 13.
Is fixedly fastened to the lower surface. Both support members 18b, 1
8c is a state in which the bolts 19 are loosened and the supporting members 18b, 18
After the c is moved to the predetermined position together with the bolt 19, the bolt 19 is tightened to be fixed at the predetermined position.

FIG. 4 is a partially broken schematic plan view showing the relationship between the bottom ten server 11 and the cradle 21, and FIG. 5 is a sectional view taken along line VV of FIG. As shown in FIGS. 4 and 5, the cradle 21 has a pair of side walls 22a and 22b and an upper wall 22c connecting the side walls 22a and 22b formed by bending a metal plate. Is a top ten server 23 as a top tensor common to two spindles
Are supported at the center. Side walls 22a, 2
A groove 24 is formed at the rear end (base end) of the second top 2b, and the cradle 21 is engaged with the support shaft 16a of the third top roller 16 supported by the support member 18b. It is supported by the support shaft 16a at the base end. The top apron 25 is wound around the top ten server 23 and the third top roller 16. A leaf spring 26 that urges the top ten server 23 toward the bottom apron 10 when the weighting arm 12 is located at the pressing position (spinning position) is fixed to the front central portion of the upper wall 22c. .

A pair of support shafts 27 are provided on both sides of the cradle 21.
Are removably fixed in a cantilevered state. Each support shaft 27 supports a weight roller 28 as a second top roller. As shown in FIG. 7, a resin block 29 is fixed to the cradle 21.
On both sides (only one side is shown) of the cradle 21, fitting holes 30, 31 (only the fitting hole 30 is shown in FIG. 7) into which the support shaft 27 is inserted are formed in the front-rear direction. In the block 29, a coil spring 33 having a ball 32 fixed to the tip is provided in a receiving hole formed to communicate with the fitting holes 30 and 31, and almost half of the ball 32 is fitted in the fitting holes 30, 31. It is housed so as to protrude inside.
The support shaft 27 has an engagement groove 34 formed on a peripheral surface near the base end. The support shaft 27 is inserted into the fitting hole 31, and the engagement groove 34
Engages with the ball 32 and is fixed at a predetermined position. The fitting hole 30 formed on the front side is used when the fiber length is relatively short, and the fitting hole 30 formed on the rear side is used when the fiber length is relatively long.

The weight roller 28 is detachably inserted into the support shaft 27 so that a part of its peripheral surface is in contact with the inner surface of the top apron 25. An annular engagement recess 28 a is formed on the inner surface of the weight roller 28. The engaging recess 28a has a trapezoidal cross section. Support shaft 27
A plurality of locking portions 27a which can be engaged with the ends of the engaging recesses 28a in the roller axis direction are protruded from the outer peripheral surface. The diameter of the minimum inner diameter portion of the weight roller 28, that is, the diameter of the portion other than the engagement concave portion 28a is the maximum outer diameter portion of the support shaft 27, that is, the locking portion 27a.
Is formed larger than the diameter at the position. The weight roller 28 presses the top apron 25 toward the bottom apron 10 by its own weight. Cradle 21, Top Ten Server 23, Weight Roller 2
8, the third top roller 16 and the top apron 25 constitute a unitized apron device.

A guide piece 36 having a pair of left and right guide portions 36a for regulating the movement of the top apron 25 in the width direction is fixed to the rear upper surface of the upper wall 22c. A tensor gauge adjusting piece 37 made of resin as a tensor gauge adjusting means is detachably fitted to the center of the front end of the top ten server 23. Top Ten Server 23
A pair of guide pieces 38 as guide portions for restricting the movement of the top apron 25 and the bottom apron 10 in the width direction are fixed to the lower surface on both left and right sides of the pair. The top apron 25 and the bottom apron 10 are formed in the same width,
The pair of guide pieces 38 project in parallel at a slightly wider interval than the width of the top apron 25 and the bottom apron 10. The guide piece 38 passes through the elongated hole 11a formed in the bottom ten server 11 when the weighting arm 12 is arranged at the pressing position, that is, when the top apron 25 is arranged at the spinning position. At the same time, the positional relationship with the long hole 11a is set such that the front surface thereof comes into contact with the front end of the long hole 11a.

FIG. 2 is a plan view schematically showing the front bottom roller 2, the second bottom roller 3, the third bottom roller 4, the back bottom roller 5, and a driving unit. Each of the bottom rollers 2 to 5 has a roller shaft 2a, 3a, 4a, 5a.
The rollers 2b, 3b, 4b, and 5b are integrally formed (shown in FIG. 1). Each roller shaft 2a
5a is configured to be dividable into a plurality. That is, each of the roller shafts 2a to 5a has a plurality of unit shafts 2c and 3 respectively.
c, 4c, 5c.

Each unit shaft 2c, 3c, 4c, 5c is formed in the same span. In this embodiment, each unit shaft 2c, 3c, 4c, 5c has 8
Rollers 2b to 5b corresponding to the weight are formed at a predetermined pitch. Since the number of spindles of a spinning machine is about 200 on one side in a general frame, each unit shaft 2c to 5c corresponds to 8 spindles. In this embodiment, each roller shaft 2a to 5a has about 25 unit shafts. 2c to 5c.

Each of the unit shafts 2c, 3c, 4c, and 5c has a spline shaft formed at a first end and a spline hole formed at a second end. It has become. In addition, each unit axis 2
The connection portions c, 3c, 4c, and 5c are supported by bearings 39 at their connection portions. The unit shaft 2c of the front bottom roller 2 is mounted on the roller stand 6, the unit shaft 3c of the second bottom roller 3, the unit shaft 4c of the third bottom roller, and the back. The unit shaft 5c of the bottom roller is supported by support brackets 7 to
9 are supported via bearings 39, respectively. Accordingly, the bottom rollers 3 to 5 after the second bottom roller 3 are supported by the roller stand 6 so as to be movable in a direction orthogonal to the longitudinal direction of the machine stand.

A gearbox 40 is provided at the end of the spinning machine. The rotation of the motor M is reduced at a predetermined ratio in the gearbox 40 and transmitted to various drive shafts. The roller shafts 2 a to 5 a of the bottom rollers 2 to 5 are
Are connected via couplings 45 to output shafts 41 to 44 as bottom roller drive shafts.

Roller shaft 3 after second bottom roller 3
Each of the unit shafts 3c to 5c constituting a to 5a is configured to be connectable via a connecting member 47 (shown in FIG. 3A) equipped with a universal joint 46. The connecting member 47 is formed to have substantially the same length as the span of the unit shafts 3c to 5c, and is configured such that its length can be adjusted. FIG.
(A) is a plan view showing a connected state of the connecting member 47 and the second bottom roller 3, wherein a main body of the connecting member 47 is connected via an unillustrated spline so as to be slidable in the axial direction and capable of transmitting torque. 47a and a pipe 47b. As the universal joint 46, for example, a hook type joint having a cross shaft is used. Connecting member 4
7, the universal joint 46 is provided with the unit shafts 3c to 5c.
Is provided with a flange yoke 48 which can be connected to the end of the flange yoke.

FIG. 3B shows a flange yoke 48.
5 is a perspective view of the flange yoke 48. The flange yoke 48 includes a flange 48b having a hole 48a through which the bolt 50 is inserted. In this embodiment, the flange yoke 48 is fixed by bolts 50 to couplings 49a, 49b connected to the ends of the unit shafts 3c to 5c via splines. The bolt 50 is adapted to be screwed into a screw hole (not shown) formed in the coupling 49a, 49b. As shown in FIG. 3A, the bearing 39 is mounted at a position close to the couplings 49a and 49b. The output shafts 42 to 44 of the gear box 40 are configured to be connectable to the respective roller shafts 3 a to 5 a via the connecting members 47.

Next, the operation of the above-configured apparatus will be described. First, a case in which a raw material having a relatively short fiber length and a raw material having a relatively long fiber length are simultaneously spun on one side of a machine base of a spinning machine will be described.

In this case, prior to the operation of the machine base, one of the unit shafts 3c constituting the second bottom roller 3 is removed, and the second bottom roller 3 (roller shaft 3a) is divided at a predetermined position. Next, the position of each divided roller shaft 3a is changed to a position appropriate for the raw material. Roller shaft 3
When changing the position of a, the nut 7b is loosened, and each support bracket 7 is moved along the roller stand 6 in that state. The movement of the roller shaft 3a is completed by tightening the nut 7b at a predetermined position.

As shown in FIGS. 1 and 5, a bottom ten server 11 for a short material is fixed to the support bracket 7 on the side corresponding to the material having a relatively short fiber length. As shown in FIG. 6, a bottom ten server 51 for a long raw material is fixed to the support bracket 7 on the side corresponding to the raw material having a relatively long fiber length. The bottom ten server 51 has the same long hole 51 a as the long hole 11 a formed in the bottom ten server 11. Therefore, the nip point by the front bottom roller 2 and the front top roller 15
The position of the second bottom roller 3 can be changed according to the fiber length distribution of the raw material without changing the distance from the apron tip (free gauge).

If the bottom apron 10 is slackened by changing the position of the second bottom roller 3, the position of the third bottom roller 4 is similarly changed to absorb the slack. If necessary, the position of the back bottom roller 5 is similarly changed.

After arranging the divided roller shafts 3a at predetermined positions, a connecting member 47 is arranged at a position where the unit shaft 3c has been removed to connect the divided roller shafts 3a.
At this time, after couplings 49a and 49b are spline-coupled to the respective divided side ends of the divided roller shaft 3a, the flange yoke 48 of the universal joint 46 of the coupling member 47 is coupled to the couplings 49a and 49b. . At this time, the position of the axis of the two divided roller shafts 3a is shifted back and forth, so that the distance is changed as compared to the case where the roller shafts 3a are on a straight line. However, since the main body of the connecting member 47 is composed of the spline-coupled shaft 47a and the pipe 47b, the connecting member 47 is positioned with the connecting member 47 interposed therebetween by changing the length of the connecting member 47 in accordance with the amount of the change. The path difference between the two roller shafts 3a is absorbed.

Next, the position of the weight roller 28 is changed in accordance with the position of the second bottom roller 3. On the side where the short raw material is spun, the support shaft 27 is fitted into the front fitting hole 30 as shown in FIGS. 1 and 5, and on the side where the long raw material is spun, the support shaft 27 is connected as shown in FIG. It is fitted into the rear fitting hole 31.
The weight roller 28 also has an appropriate weight.

When the weighting arm 12 is located at the pressing position, the front top roller 15 is placed on the front bottom roller 2, and the third top roller 16 is placed on the top apron 25 at a position facing the third bottom roller 4.
The back top roller 17 is pressed against the back bottom roller 5 with a predetermined pressing force. Further, the leaf spring 26 is engaged with the lower surface of the weighting arm 12, and the cradle 21 receives a pressing force obliquely forward through the leaf spring 26. Then, the guide pieces 38 are engaged with the front ends of the long holes 11a and 51a of the bottom ten servers 11 and 51, and the cradle 21 is positioned at a predetermined position where the tensor gauge adjustment piece 37 abuts on the upper surfaces of the bottom ten servers 11 and 51. Is held. The top apron 25 is pressed against the bottom apron 10 by the force of pressing the third top roller 16 toward the third bottom roller 4, the pressing force of the weight roller 28 by its own weight, and the tension of the top apron 25.

By the above-mentioned preparation work, two kinds of raw materials A and B can be simultaneously spun. In the spinning machine, since the spinning units are provided on both the left and right sides along the longitudinal direction of the machine base, in this case, as shown in FIG.
The right side of FIG. 2 (upper side in FIG. 8A) and the left side of the machine 52 have the same spinning condition A, and the remaining part of the left side of the machine 52 (the hatched portion) is another spinning condition. Condition B is satisfied.

The bottom apron 10 is rotated by the rotation of the third bottom roller 4, and the top apron 25 is rotated in synchronization with the bottom apron 10 by the contact pressure with the bottom apron 10, and cooperates with the bottom apron 10. The fiber bundle (not shown) is transferred. The pressing force of the top apron 25 against the bottom apron 10 is set to an appropriate value corresponding to the spinning conditions by changing at least one of the tensor gauge adjustment piece 37 and the weight roller 28.

The weight roller 28 is detachably inserted into the support shaft 27 in a detachable manner. However, since the engagement concave portion 28a rotates in a state of being engaged with the locking portion 27a, the weight roller 28 is moved in the axial direction of the support shaft 27. Movement to is regulated. Therefore, there is no possibility that the weight roller 28 will be detached from the support shaft 27 during driving of the draft device. The top apron 25 is guided by the guide piece 38 and the guide portion 36a, and is restricted from moving in the width direction, and travels at a predetermined position.

The side where the aprons 10 and 25 are pressed against each other, that is, the side where the fiber bundle is gripped and transferred is the slack side of the apron, so that the space between the bottom ten servers 11 and 51 and the third bottom roller 4 is provided. If the length is long, slack occurs in the intermediate portion, and the regulating force of the fiber bundle is weakened. However, since the second bottom roller 3 exists in the middle part, the bottom apron 10 does not loosen even if the distance between the bottom ten servers 11 and 51 and the third bottom roller 4 is long. Further, the top apron 25 is also pressed toward the bottom apron 10 by the weight roller 28 disposed at a position corresponding to the second bottom roller 3, so that slack that adversely affects the regulating force of the fiber bundle does not occur.

Also, since the positions of the weight roller 28 and the second bottom roller 3 and the weight of the weight roller 28 are adjusted according to the fiber length distribution of the raw material, the contact pressure of the apron is adjusted to an appropriate value. . Therefore, the middle of the fiber passing through the apron is held down by a moderate load,
The high-speed transition state when the fiber is pulled out by the front rollers (the front bottom roller 2 and the front top roller 15) is stabilized. Moreover, the distance between the nip point formed by the front roller and the tip of the apron, that is, the free gauge is set to be the same even when the distance between the second bottom roller 3 and the front bottom roller 2 is changed. Is suppressed. As a result, uniform drafts without unevenness are performed.

Although the position of the axis of the second bottom roller 3 is shifted in the direction orthogonal to the machine direction with the connecting member 47 interposed therebetween, the second bottom roller 3 is connected to the roller shaft 3 a via the universal joint 46. 47, the rotation of the output shaft 42 is smoothly transmitted to the end of the second bottom roller 3 on the side remote from the output shaft 42. Therefore, spinning can be simultaneously performed under draft conditions in which the distance between the front roller and the second roller is different.

As described above, an example in which two types of A and B types of raw materials having greatly different fiber length distributions are used at the same time has been described. 8B, one side (for example, right side) of the machine base 52 is set as the spinning condition of A, and the other side (left side) is set as the spinning condition of B, as shown in FIG. 8B. In this case, it is not necessary to divide the second bottom roller 3 in the middle, and the unit shaft 3 c facing the output shaft 42 of the roller shaft 3 a of the second bottom roller 3 whose position needs to be changed is replaced with the connecting member 47. That is, the roller shaft 3 a of the second bottom roller 3 is connected to the output shaft 42 via the universal joint 46. Then, the position of the support bracket 7 that supports the roller shaft 3a is moved so that the second bottom roller 3
The whole is arranged at a predetermined position. Second bottom roller 3
Since the output shaft 42 for rotating the second bottom roller 3 and the second bottom roller 3 are connected via the connecting member 47, even if the axis of the second bottom roller 3 and the axis of the output shaft 42 are shifted from each other, The rotation of the output shaft 42 is reliably transmitted to the second bottom roller 3 without any trouble.

Further, not only two types of raw materials but also three or more types of raw materials may be spun at the same time. For example, A, B, C
In the case of simultaneously spinning different kinds of raw materials, for example, as shown in FIG. 8C, spinning under different conditions is performed on both the left and right sides of the machine base 52.

When the fiber length distribution of the raw materials is significantly different, it is necessary to change the support position of the weight roller 28 so as to correspond to the position of the second bottom roller 3. But,
For example, when there is a difference in the fiber length, but the difference is not so large, only the position of the second bottom roller 3 is moved to an appropriate position, and the position of the support shaft 27 supporting the weight roller 28 is changed without changing the weight. The problem may be solved simply by replacing the roller 28 with one having a different weight or outer diameter.

Further, depending on the raw material and other spinning conditions, the optimum draft condition cannot be obtained only by changing the position of the second bottom roller 3, and the free gauge may be changed, or the third bottom roller 4 and the back bottom roller 5 may be changed. May need to be changed. In the draft device of this embodiment, the third bottom roller 4 and the back bottom roller 5 can also divide the roller shafts 4a, 5a at the unit shafts 4c, 5c, as well as the second bottom roller 3, and the output shafts 43, 44 On the other hand, it is configured to be connectable via a connecting member 47 having a universal joint 46.
Therefore, similarly to the case of the second bottom roller 3, the divided roller shafts 4a and 5a can be connected via the connecting member 47, and the arrangement position can be freely adjusted in a direction orthogonal to the longitudinal direction of the machine base. In addition, the position of the entire roller shafts 4a and 5a can be freely adjusted in a direction orthogonal to the longitudinal direction of the machine base.

This embodiment has the following effects. (A) At least a roller shaft 3a for driving the second bottom roller 3 is configured to be able to be divided into a plurality, and each divided unit shaft 3c is configured to be movable in a direction orthogonal to the longitudinal direction of the machine base. If the shaft 3c is disposed in a state where the axes do not coincide with each other, the unit shaft 3c
These can be connected via a universal joint 46. Accordingly, spinning can be simultaneously performed under at least two different draft conditions by one spinning machine. As a result, it becomes easy to cope with multi-product small-lot production.

(B) Only the position of the second bottom roller 3 of the second bottom roller 3 and the third bottom roller 4 existing in the bottom apron 10 is independently set in a direction orthogonal to the machine direction, that is, the second bottom roller 3
The movement can be adjusted in the direction perpendicular to the axial direction. Therefore, the position of the second bottom roller 3 can be changed according to the fiber length distribution of the raw material without changing the free gauge.
As a result, in the case of long fiber spinning, spinning can be performed under appropriate draft conditions in accordance with the fiber length distribution of the raw material.

(C) The mounting position of the second top roller of the apron device having the second top roller (weight roller 28) and the third top roller 16 provided corresponding to the spinning of the long fiber can be changed in the longitudinal direction of the cradle 21. Is configured. Therefore, the position of the second top roller can be changed in accordance with the position change of the second bottom roller 3, and spinning can be performed under more appropriate draft conditions.

(D) When spinning is performed using the same machine and the same raw material, the second bottom roller 3 and the weight roller 28 are used.
Can easily perform a comparison test for setting an optimum nip point. This is because the second bottom roller 3 is divided into a plurality of parts and connected via the connecting member 47, and spinning is performed by providing a plurality of places where the distance between the nip point of the front roller and the nip point of the second roller is different. This is because a large number of data having different distances between the nip point of the front roller and the nip point of the second roller can be obtained by one spinning, and the number of times of the test spinning can be reduced.

(E) Each of the bottom rollers 3 to 5 has a structure in which the roller portions 3b to 5b are formed integrally with the roller shafts 3a to 5a, so that the draft device disclosed in Japanese Patent Application Laid-Open No. 61-282433 is used. As shown in FIG.
The structure is simplified as compared to a configuration in which rotation is transmitted via a gear train from a drive shaft common to all weights by making each weight independent.

(F) When the unit shafts 3c to 5c constituting the roller shafts 3a to 5a are formed in the same span and the positions of the unit shafts 3c to 5c are changed, the roller shafts 3a to 5c are changed.
By replacing some of the unit shafts 3c to 5c constituting the 5a with connecting members 47 having universal joints 46 at both ends, it is possible to easily cope with division and connection of the roller shafts 3a to 5a at arbitrary positions. .

(G) Since the bottom rollers 3a to 5a subsequent to the second bottom roller 3a can be connected to the output shafts 42 to 44 via universal joint means, each of the bottom rollers 3a to 5a can be connected.
The position of the whole 5a can be moved and adjusted in a direction orthogonal to the longitudinal direction of the machine stand, and spinning can be simultaneously performed under different spinning conditions for each side of the machine stand 52 of the spinning machine.

(H) The connecting member 47 for connecting the divided roller shafts 3a to 5a and the connecting member 47 as universal joint means for connecting the roller shafts 3a to 5a and the output shafts 42 to 44 can be shared. Therefore, it is only necessary to prepare one type of connecting member 47, and storage and maintenance become convenient.

(I) Since the support shaft 27 supporting the weight roller 28 (second top roller) is configured to be detachable from the cradle 21 with one touch, the position of the weight roller 28 can be easily changed.

(G) The weight roller 28 can be attached to and detached from the support shaft 27 while the top apron 25 is wound around the top ten server 23 and the third top roller 16. If an appropriate draft condition can be obtained only by changing the roller 28, the operation is simplified.

(L) When the long top apron 25 for spinning long fibers is used, a pair of guide pieces 3 of the cradle 21 are used.
8, the top apron 25 and the bottom apron 10
Is regulated in a direction orthogonal to each of the roller shafts 2a to 5a.
As a result, the parallelism of both aprons 10 and 25 is maintained in a high state, the variation in rotation of both aprons 10 and 25 is reduced, the occurrence of draft unevenness is suppressed, and the quality of spun yarn is improved.

(Second Embodiment) Next, a second embodiment will be described with reference to FIGS. In this embodiment, the configuration of the second top roller and the configuration for position adjustment thereof are different from those of the above-described embodiment, and the other configurations are the same. The same parts are denoted by the same reference numerals, and detailed description is omitted.

On both side walls 22a and 22b of the cradle 21, long holes 53 are formed so as to extend along the longitudinal direction of the cradle 21. A plurality of (four in this embodiment) engagement surfaces 53a having substantially the same curvature as the outer peripheral surface of the support shaft 54a of the second top roller 54 are formed in the long hole 53 on the bottom apron 10 side. When the second bottom roller 3 is arranged at a position suitable for spinning a relatively short fiber (the state shown in FIG. 9), the second top roller 54 is supported by the support shaft 54a so as to face the second bottom roller 3. Are formed at a predetermined interval at a position supporting the.

The position of each engagement surface 53a is determined in advance by determining the appropriate position of the second top roller 54 corresponding to the fiber length distribution of the raw material fibers, thereby obtaining the position corresponding to the difference in the fiber length distribution of the raw material used. Is set to In the case of wool having a high content of short fibers, the position shown in FIG. 9 is an appropriate position. In the case of a material having a low content of short fibers and a relatively high proportion of longer fibers, a position behind the appropriate position is an appropriate position. Becomes

As shown in FIG. 11, a screw hole 55 is formed at the center of the support shaft 54a so as to be orthogonal to the longitudinal direction of the support shaft 54a. A screw 56 having a hexagonal hole (not shown) is screwed into the screw hole 55 so as to pass through the support shaft 54a and abut on the lower surface of the upper wall 22c. The support shaft 54a is fixed in a state in which the support shaft 54a is inserted into the long hole 53 and is engaged with the engagement surface 53a, and is urged against the engagement surface 53a by a screw 56. As shown in FIGS. 9 and 10, the positioning plate 5 is provided on the upper surface on the front side of the upper wall 22c.
7 is fixed. The positioning plate 57 engages with the side surface of the frame 13 when supporting the cradle 21 on the frame 13 of the weighting arm 12 and engages with the cradle 2.
1 plays a role in positioning. A so-called balloon roller is used as the second top roller 54, and a support shaft 54a
Is fixed to both ends. Second top roller 54
As shown in FIG. 10, the bearing 58 is press-fitted and fixed to the support shaft 54a, a support ring 59 fitted and fixed to the outer ring thereof, and a hollow material made of a flexible material (for example, plastic or rubber) covering the outside thereof. And a roller 54b. The hollow roller 54b is filled with air.

Therefore, this embodiment has the following effects in addition to the effects (a) to (h), (nu) and (l) of the above embodiment. (ヲ) A support shaft 54 that supports the second top roller 54
The mounting position of “a” can be changed in the longitudinal direction of the cradle 21 without removing the second top roller 54 from the support shaft 54a. Therefore, the position of the second top roller 54 can be changed by a simple operation to a position where an appropriate state corresponding to the raw material is obtained.

(V) The screw 56 is screwed into a screw hole 55 formed in the support shaft 54a so as to penetrate the support shaft 54a.
The support shaft 54a can move along the elongated hole 53 simply by loosening the tip (upper end) so as to be separated from the upper wall 22c. Therefore, the position of the support shaft 54a can be easily changed.

(F) Since a balloon roller is used as the second top roller 54, the state of pressing the top apron 25 by the second top roller 54 becomes soft, and the fiber bundle passing between the aprons 10 and 25 becomes soft. Even if the thickness is uneven, the fluctuation of the gripping force acting on the fiber is suppressed, and the yarn quality is improved.

(4) Since the four engagement surfaces 53a are formed, the position of the second top roller 54 can be changed in four steps. Therefore, the position of the second top roller 54 can be arranged at a more appropriate position corresponding to the raw material fibers than in the above embodiment.

The embodiments are not limited to the above embodiments, but may be embodied as follows, for example. (1) The roller shafts 2a to 5a of each of the bottom rollers 2 to 5 have a large number of unit shafts 2c in order to increase the degree of freedom of the dividing position.
Not limited to those constituted by 5c, but may be constituted by two unit shafts which can be divided into two. In this case, when spinning is performed simultaneously under two types of draft conditions, the positions of both unit shafts are changed by connecting both unit shafts with a universal joint. Further, a configuration in which two unit shafts are always connected by a universal joint may be adopted.

(2) In the case of a structure capable of spinning simultaneously under two kinds of spinning conditions, the roller shaft is composed of two long unit shafts and one short unit shaft, and two types of roller shafts are simultaneously formed. In the case of spinning under the spinning conditions described above, the short unit shaft may be removed and the two unit shafts may be connected via a universal joint at that portion. In this case, compared to a configuration in which two unit shafts are always connected by a universal joint, there is no need to provide a number of spindles for stopping spinning when spinning under the same spinning conditions as for all spindles. Similarly, a configuration may be adopted in which three or more long unit shafts are provided and a short unit shaft is provided therebetween.

(3) The connecting member 47 does not need to be formed in the same span as the unit shafts 3c to 5c formed in the same span, and may be short. In this case, an auxiliary shaft having a roller portion shorter than the unit shafts 3c to 5c formed in the same span is prepared, and when connecting the divided unit shaft portions 3c to 5c, the auxiliary shaft and the connecting member 47 are connected. Is used. In this case, when spinning is performed under a plurality of different spinning conditions, the weight that can be spun can be increased by the amount of the roller portion formed on the auxiliary shaft.

(4) The end of each of the roller shafts 3a to 5a after the second bottom roller 3 may be connected to the output shafts 42 to 44 via a universal joint from the beginning. In this case, when the entire bottom rollers 3 to 5 are changed to the same position, the trouble of exchanging the coupling 45 and the universal joint is omitted.

(5) As the configuration of each of the bottom rollers 3 to 5 after the second bottom roller 3, roller shafts 3a to 5a
Instead of the configuration in which the roller portions 3b to 5b are integrally formed, each bottom roller is made independent by one or two weight units as in a draft device disclosed in Japanese Patent Application Laid-Open No. 61-282433. Each bottom roller may be driven via a gear train from a drive shaft common to all weights extending along the longitudinal direction of the table. In this configuration, the drive shaft forms a roller shaft. Then, the drive shaft is configured to be able to be divided into a plurality, and each divided unit shaft is supported movably with respect to the machine in a direction orthogonal to the longitudinal direction of the machine, and the unit axes do not coincide with each other in axis. When the unit shafts are arranged in a state, the unit shafts can be connected to each other via a universal joint.

(6) The spindle 5 in the second embodiment
The fixed position of 4a can be changed continuously (steplessly), not stepwise. For example, the long hole 53 is formed in a rectangular shape, and as shown in FIG. 12, the support shaft 54a is formed in a flat shape whose intermediate portion has a thickness smaller than the diameter on both sides. Then, with the flat portion 54 c engaged with the long hole 53, the screw 60
Can be fixed by As shown in FIG. 12A, a long hole 61 is formed at the center in the width direction of the upper wall 22c so as to extend along the longitudinal direction of the upper wall 22c.
, A nut 62 is mounted so as to be slidable and non-rotatable relative to the upper wall 22c. The screw 60 is screwed into the nut 62 from the upper side of the upper wall 22c, and tightens and fixes the support shaft 54a in a state where the tip thereof comes into contact with the concave portion 63 formed in the center of the flat portion 54c. The positioning plate 57 and the leaf spring 26 are formed with holes at positions corresponding to the long holes 61 so as not to hinder the movement of the screw 54a and the nut 62. In this case, the position of the support shaft 54a is
Can be changed steplessly in the longitudinal direction, so that even when there are many types of fiber length distribution of the raw fibers, it is possible to adjust to more appropriate contact pressure conditions. Further, since the screw 60 for fixing the support shaft 54a can be operated from the upper side of the cradle 21, the work at the time of changing the position of the support shaft 54a becomes easier than in the second embodiment.

(7) In the case of using the weight roller 28 as the second top roller as in the first embodiment, a plurality of support shafts are connected to the side wall of the cradle 21 instead of the support shaft 27 being detachable. It is also possible to adopt a configuration in which the weight roller 28 is protruded from the bases 22a and 22b, and only the weight roller 28 is removed and supported on a desired support shaft 27. in this case,
It is only necessary to provide a plurality of support shafts 27 penetrating the side walls 22a, 22b of the cradle 21, and the structure and manufacturing are simplified.

(8) Not only a draft device provided with a double-roller apron device suitable for spinning long fibers, but also a 3-wire draft device provided with a single-roller apron device or a 3-wire device not using an apron You may apply to the draft device of a formula.

(9) The cradle 21 is not a double spindle type,
It may be a single weight type. (10) The weight roller 28 does not necessarily need to contact the inner surface of the top apron 25 on both the upper and lower sides, and may be configured to contact only the lower inner surface of the top apron 25.

(11) The leaf spring 26 and the tensor gauge adjustment piece 37 provided on the cradle 21 may not be provided. Inventions other than those described in the claims that can be grasped from the embodiment will be described below together with their effects.

(1) The bottom roller subsequent to the second bottom roller is configured to be able to be divided into a plurality of parts, the divided bottom rollers are connected via a universal joint, and the position of each divided part is determined by the spinning conditions. A spinning method in which raw fibers requiring different drafting conditions are simultaneously spun by a single spinning machine. In this case, multi-product, small-lot production can be performed efficiently.

(2) At least a roller shaft for driving the bottom roller after the second bottom roller is divided into a plurality of shafts, and each of the divided unit shafts can be moved relative to the machine in a direction perpendicular to the machine longitudinal direction. Support,
A draft device for a spinning machine in which each unit shaft is connected via a universal joint. In this case, the spinning under a plurality of different draft conditions can be performed at the same time by adjusting the position for each of the unit shaft portions located across the universal joint.

(3) The draft device according to any one of claims 1 to 4, wherein the draft device according to any one of claims 1 to 4 includes a three-wire system including three front, middle, and back bottom rollers as bottom rollers. It is a draft device. In this case, even in the case of cotton spinning and the like, it is possible to efficiently produce many kinds and small lots.

[0085]

As described in detail above, claims 1 to 6 are provided.
According to the invention described in (1), spinning can be simultaneously performed under at least two different draft conditions by one spinning machine, and multi-product small-lot production can be efficiently performed.

According to the second aspect of the present invention, there is provided a drafting device for a spinning machine used for spinning a long fiber provided with an apron drafting device in which a bottom apron is wound around a bottom tensor and a second and third bottom rollers. ,
The position of the second bottom roller can be changed according to the fiber length distribution of the raw material without changing the distance (free gauge) between the nip point of the front roller and the tip of the apron.
As a result, spinning of at least two types of raw materials having different fiber length distributions can be simultaneously performed under appropriate draft conditions.

According to the third aspect of the present invention, the mounting position of the second top roller can be changed to a predetermined position corresponding to the position of the second bottom roller, and drafting can be performed in a more appropriate state.

According to the fourth aspect of the present invention, since the roller portion is formed integrally with the roller shaft, the structure is simplified. According to the fifth aspect of the present invention, in order to cope with a plurality of draft conditions, the unit shaft can be easily replaced at any position with a connecting member having a universal joint at both ends, and a ratio of weights having different spinning conditions is provided. The degree of freedom of setting is increased.

According to the sixth aspect of the present invention, the universal joint means for connecting the unit shafts and the connecting member for connecting the roller shaft to the bottom roller drive shaft can be shared.
It is only necessary to prepare various types of connecting members, and storage and maintenance become convenient.

[Brief description of the drawings]

FIG. 1 is a partially broken side view of a first embodiment.

FIG. 2 is a schematic plan view of a bottom roller.

FIG. 3A is a plan view showing a connection state of a connection member and a second bottom roller, and FIG. 3B is a perspective view of a flange yoke.

FIG. 4 is a partially cutaway plan view showing a cradle;

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a side sectional view corresponding to FIG. 5 in the case of spinning long fiber.

FIG. 7 is a partial sectional view showing a support state of the weight roller.

FIG. 8 is a schematic view when a plurality of different spinning conditions are performed.

FIG. 9 is a side sectional view corresponding to FIG. 5 of the second embodiment.

FIG. 10 is a partially cutaway plan view showing the cradle in a similar manner.

FIG. 11 is a front view showing the support state of the support shaft.

12A is a cross-sectional view showing a support state of a spindle according to another embodiment, FIG. 12B is a cross-sectional view taken along line BB of FIG. 12A, and FIG.
3A is a cross-sectional view taken along line CC of FIG.

FIG. 13 is a schematic side view of a conventional device.

[Explanation of symbols]

3 ... second bottom roller, 4 ... third bottom roller,
3a, 4a, 5a: roller shaft, 3b, 4b, 5b: roller portion, 3c, 4c, 5c: unit shaft, 11: bottom ten server as bottom tensor, 16: third top roller, 21: cradle, 23: top Top Ten Server as Tensor, 25 ... Top Apron, 2
8 ... weight roller as second top roller, 4
2 ... Output shaft as bottom roller drive shaft, 46 ... Universal joint, 47 ... Connecting member, 54 ... Second top roller.

Claims (6)

[Claims] At least a roller shaft for driving a second bottom roller is configured to be able to be divided into a plurality of units, and each of the divided unit shafts is supported movably with respect to the machine in a direction orthogonal to a longitudinal direction of the machine. A drafting device for a spinning machine in which, when the unit shafts are not aligned with each other, the unit shafts can be connected to each other via a universal joint. 2. A drafting device for a spinning machine provided with an apron draft device in which a bottom apron is wound between a bottom tensor and a second and third bottom roller, wherein a roller shaft for driving a second bottom roller of the apron draft device is provided. It is configured so that it can be divided into a plurality, and each divided unit axis is supported movably with respect to the machine in the direction orthogonal to the longitudinal direction of the machine. In this case, a draft device for a spinning machine in which the unit shafts can be connected via a universal joint. 3. The apron draft device includes a cradle equipped with a top tensor, a second top roller, a third top roller, and a top apron, and is configured such that a mounting position of the second top roller can be changed in a longitudinal direction of the cradle. The drafting device for a spinning machine according to claim 2, wherein 4. The drafting device for a spinning machine according to claim 1, wherein a roller portion is integrally formed with the roller shaft. 5. The connecting member for connecting the unit shafts to each other when the unit shafts are formed in the same span, and the unit shafts are arranged in a state where the axes of the unit shafts do not coincide with each other. The drafting device for a spinning machine according to any one of claims 1 to 4, wherein the drafting device is formed with a universal joint at both ends. 6. The apparatus according to claim 5, wherein said roller shaft is connected to a bottom roller drive shaft via universal joint means, and said universal joint means and a connecting member for connecting said unit shafts can be shared. The draft device of the spinning machine according to the above.