JPH0241420A - Winding apparatus of spinning frame - Google Patents

Abstract

PURPOSE:To eliminate the troubles such as end-breakage and defective winding form by controlling the speed of a variable speed driving motor for a friction roller according to the bending extent of the yarn path measured by a bending extent detection sensor of a tensor device placed between a spinning part and a winding part. CONSTITUTION:Yarn Y spun by a spinning part 2 is passed through a tension arm 38 of a tensor device 16 and a friction roller 23 and wound to form a package 22. The speed of a variable speed driving motor 24 is controlled according to the bending extent of the yarn path measured by an angle-detection sensor connected to the shaft of the tension arm 38.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is an innovation in spinning machines, especially open-end spinning machines in which the yarn spinning section and winding section are separate devices, and pneumatic spinning machines using air jets. This invention relates to a winding device in a spinning machine.

[Conventional technology]

In the above-mentioned innovative spinning machine, the speed of the yarn spun from the spinning section is almost constant, so if the winding speed at the winding section is not kept constant, the tension will fluctuate greatly and cause yarn breakage. The shape of the rolled up package may become defective.

The above problem is not so difficult to solve when the winding package is in the shape of a cheese, and can generally be solved by providing a known tension applying device that smooths out tension fluctuations between the spinning section and the winding section. However, when the winding package is cone-shaped, the tension fluctuation cannot be completely eliminated by adding the above-mentioned tension device.

In other words, in a cone-shaped package, the outer circumference length of the large-diameter part and the small-diameter part are greatly different, so the winding speed changes each time the yarn is traversed from side to side. The winding speed becomes smaller on the side. In other words,
Since the spinning speed from the spinning section is constant, the tension is higher on the larger diameter side.

Furthermore, in addition to this, in a cone package, the winding speed of the yarn is different between the large diameter side and the small diameter side as mentioned above, so the winding tension on the large diameter side is inevitably higher than the winding tension on the large diameter side of the package. The winding is tighter, so the winding speed is faster on the small-diameter side than on the large-diameter side. Therefore, the rotational force is transmitted to the pan cage by the friction roller (the contact force between the package and the friction roller is the highest). As the winding progresses, the point of contact (point of contact at In addition to the above-mentioned small tension fluctuations for each traverse, there is a problem in that the overall tension tends to increase as the winding becomes thicker.

[Problem to be solved by the invention]

As mentioned above, when winding into a cone shape on a spinning machine, the mode of tension fluctuation is more complex and the range of fluctuation is larger than in cheese winding, and the mechanism that causes the tension fluctuation is also complex, so for example, Even if you make small improvements such as simply changing the material of the friction roller to one with a higher coefficient of friction to reduce the slip between the friction roller and the pan cage, problems such as yarn breakage and poor winding shape due to tension fluctuations will still occur. Although it has been difficult to completely eliminate the above-mentioned problems, the present invention attempts to completely eliminate the above-mentioned problems.

[Means to solve the problem]

This invention provides a spinning machine as described above with a tensor device that bends the yarn path with a constant tension between the spinning section and the winding section, and the friction rollers for rotating the package in the winding section are independent of each spindle. A variable speed drive motor is connected to the friction roller of each spindle, and the tensor device is provided with a bending amount detection sensor for detecting the bending amount of the yarn path. The winding device is configured to control the speed of the variable speed drive motor according to the amount of bending of the winding device.

〔Example〕

An example in which the apparatus of the present invention is implemented in a pneumatic spinning apparatus will be described below.

(1) is a fixed frame with a U-shaped cross section, an air spinning unit (spinning section) (2) is mounted on the top, a slab catcher (3) is catching section (4) and the slab catcher (2) are mounted on the front. ) and winding (4) are each provided with a tensor device (16) for bending the yarn path, and a guide rail (
5) and (6), the yarn splicing cart (7) is installed so as to be movable in the longitudinal direction of the frame (in the direction perpendicular to the paper plane in FIG. 1).

The air spinning unit (spinning section) (2) is a back roller
(8), middle roller (9), front roller (10)
) consisting of a draft bar (11), an air spinning nozzle (12>), a delivery roller (13) and a nip roller (
It consists of a pair of rollers (14) and a suction tube (15) such as cotton wool.

The air spinning nozzles (12) are composed of two air swirling nozzles having different swirling directions and arranged before and after the fiber bundle passage.

The camellia removing part (4) is formed by pressing a package (22) against a friction roller (23) by a cradle (21) rotatably supported by a shaft (20), and this friction roller (23) It is supported by a variable speed drive motor (2) which will be described later.
4).

The yarn splicing cart (7) has a suction pipe (30) for feeding the yarn end on the sending side, a suction mouth (31) for suctioning the yarn end on the taking side, and a suction air flow is generated in each suction member (30) and (31). The yarn splicing member (33) such as a blower (32) and a splicer that uses a knock or air injection is installed. (17) is a suction pipe, generally called a slack tube, which suctions and pulls the yarn to the right in FIG. 1 in order to take up the slack of the yarn spun by this yarn splicing cart (7) during yarn splicing.

Further, (26) is an endless belt connecting the drive motor (24) and the friction roller (23), and (27) is a control device incorporating a microcomputer that controls the speed of the drive motor (24).

Therefore, the sliver (S) passes through the spinning unit (2).
The yarn (Y) spun from the slab catcher (3)
The yarn is wound onto a bobbin (B) supported by a cradle (21) via a tensor device (16), and a slab catcher (3) detects a yarn defect and cuts the yarn with a cutter (not shown). In this case, the yarn splicing cart (7) stops at the weight and the suction members (30) (31)
Then, by operating the knock (33), the upper and lower yarns are spliced and the normal operation is resumed.

The tensor device (16) and the winding section (4) will be explained below.

That is, as shown in Fig. 2.3, the tensor device (16) is installed in front of the housing (35) of the waxing device (34) fixed to the frame (1), and is attached to the sheet metal. a housing (36) bent into a U-shape in plan view, and a pivotable tension-applying arm (38) biased toward the housing (36) in the clockwise direction in FIG. 2 via a mainspring spring (37). and said arm (38
) is connected to the shaft (39) and detects the angle thereof, and the arm (38) is forcibly retracted to the position indicated by the chain line in the counterclockwise direction in Fig. 2 during yarn splicing. , a bush rod device (42).

(-35a) is a slit formed in the front surface of the housing (35) of the waxing device (34), and the thread (Y) passes through the open side of the U-shaped housing (36) and the slit (35a). It is passed through a waxing device (34) (FIG. 3).

(43) is wax that is loosely (biased) forward within the housing (35) by a spring (44).

The tension applying arm (38) has a rotatable roller tube (45) that projects horizontally at its free end, and the thread (Y) bends and moves around the roller tube (45) with extremely low resistance. .

The mainspring spring (37) has one end (37a) thrust into and fixed into the shaft (39) of the arm (38), and the other end (37b)
) is fixed to a circular spring casing (46), and a mainspring spring (37) works between this shaft (39) and the spring casing (46) to move the arm (38) clockwise in Figure 2. This spring casing (46) is adapted to change its fixed angle relative to the housing (36).

That is, the spring casing (46) is connected to the front plate (36a) of the housing, and the front plate (36a) is connected to the screw (36a).
47) It is clamped and fixed between the fixed fixing plate (48), and by loosening this screw (47), the fixing plate (4
8) from the front plate (36a) (if it moves in the direction of the swing arm (38)), the spring casing (46
) decreases, so in this state, rotate the spring casing (46) around the axis (39) in the desired direction,
Next, by tightening the screw (47) and strongly pressing the casing (46) between the front plate (36a) and the fixing plate (48), the biasing force of the mainspring spring (37), that is, the arm (38) It is possible to apply tension to the threads by m cylinders.

The angle detection sensor (41) has a resistance value that changes with the rotation of the shaft (39) and outputs the turning angle of the arm (38) as a voltage level, but various other types can be used.

A signal from this sensor (41) is transmitted to a control device (2) which will be described later.
7) is done manually.

Moreover, the bushing rod device (42) is connected to the housing (
36), and a spring (51) that constantly biases the rod (49) to the left in FIG. 2. (49) is usually the force of the spring (51) and the rod (
The stop ring (52) fitted in the second
Although it is stationary at the position shown, the head of the rod (49) (
49a) is the pressing device (53) on the yarn splicing cart (7).
) (Fig. 2.6), the spring (5
1), move to the right in Figure 2 and remove the rod tip (49b).
) pushes the other end step (54) of the arm (38) to pivot the arm (38) to the retracted position shown in FIG. 2 by the dashed line.

As shown in Fig. 2.6, the pressing device (53) on the yarn splicing cart (7) has a fluid cylinder (55) and its rod (55a).
It consists of a pivot arm (57) connected to the end (56).

Next, the winding section (4) will be explained.

The winding section (4) in this example is connected to the cradle (21) as described above.
), a friction roller (23), and a variable speed drive motor (24).
) is a rotary cylinder (59) rotatably supported by a ball bearing (not shown) or the like around a through shaft (58) fixed to the frame (1), as shown in the fourth figure; A rubber ring (61) for improving the rotational transmission rate to the package (22) is fitted in a part of the R(
The endless belt (26) is suspended around 59a).

As is well known, the cradle (21) is rotatable around the shaft (20) and has an arm (6) fixed to the bobbin (B).
2) and the arm (63) that comes into contact with and separates from the bobbin (B)
(Package (22)) is held between the left and right sides. (6
4) (65) are each arm (62) (fi
3) A disk-shaped bobbin holder rotatably supported at the end.In this example, the winding section (4) has a bobbin holder (6
The back side of 4) is colored (66) so that black and white alternate every half circumference as shown in Figure 5, and the arm (62)
A photosensor (67) is attached to the side facing the back surface of the bobbin holder (64).

In other words, the photo sensor (67) detects the increase or decrease of reflected light from the back surface of the bobbin holder (64) and
) (Package (22) 'I is designed to detect the rotational speed. The rotational speed detection signal from the photo sensor (67) is input manually to the control device (27).

(68) is a bearing that supports the central shaft (69) of the bobbin holder (64).

Note that instead of the photosensor (67) and coloring (66), a proximity sensor, encoder, or other similar rotation speed detection means may be used, and the rotating shaft of the drive motor (24) can be used to rotate the cradle (21). By making it coaxial with the shaft (20), the endless bell (26) can be directly routed to the bobbin holder (64) or (65), and the bobbin (B) can be directly rotated without going through the friction roller (23). can.

Next, the control device (27) that controls the variable speed drive motor (24) will be explained.

That is, a microcomputer (70) is installed in this control device (27), and this computer (70
) stores a program consisting of the following means for winding the thread (Y) at a nearly constant tension (Fig. 7).

In other words, the rotation speed of the bobbin CB) is set to
7), and means (71) for calculating the peripheral speed (winding speed) of the bobbin (B) based on the rotational speed, and the means (71) for calculating the peripheral speed of the bobbin (B) based on the rotation speed, and the means (71) for calculating the peripheral speed of the bobbin (B) based on the rotation speed, and the means (71) for calculating the peripheral speed of the bobbin (B) based on the rotation speed. (72) compares the circumferential speed of the delivery roller (13) which is manually operated by hand & (72), and based on this comparison, if the former is small, a speed increase command is issued to the motor (24), and if the former is large, a speed increase command is issued to the motor (24); determines that the bobbin circumferential speed has reached the same speed as the delivery roller circumferential speed by the command means (73) that issues a deceleration command and the above-mentioned means (71) (72),
The angle sensor (41) controls the motor (24) based on feedback from a signal from the photo sensor (67).
), and means (75) for comparing the angle signal from the angle sensor (41) with a preset angle value after being switched by the switching means. and if the former is large according to the comparison means (75) (that is, the angle θ in FIG.
is large), issues a speed increase command to the motor (24),
When the former is small (when the angle θ is small), the command means (76) for issuing a deceleration command is stored. Please note that delivery (
The rotational speed of the +-ra (13) is detected by a known detection means such as an encoder or a photosensor.

Therefore, the apparatus of the embodiment operates as follows according to the above program.

In other words, assuming that the now empty bobbin (however, a small amount of seed yarn is wound to start winding) is already installed in the cradle (21) and the operation start switch is pressed, the yarn splicing cart ( 7) moves to the spindle to be wound and stops, the suction pipe (30) suctions the yarn to be spun at the solid line position in Figure 1, and the suction mouth (31) moves to the spindle to be wound up. The seed yarn is sucked and guided to the knock (33) for splicing.

At this time, the arm (38) is retracted by the pressing device (53), and the empty bobbin (B) is moved from the cradle (21) by a lever (not shown) projected from the yarn splicing cart (7). The friction roller (2
3) and is reversely rotated by another reversing roller (mounted on the yarn splicing cart), but when the yarn splicing is completed, the cradle (21) is tilted and the bobbin (B) is moved to the friction roller ( 23), and due to the friction therebetween, it starts rotating in the direction of winding the thread (that is, clockwise in Figure 1). When the thread splicing is completed, the arm (38) is released from the forced rotation by the rod (49), and the spring (37) is attached to the thread.
begins to apply a certain tension. In addition, since the spun yarn speed is faster during the splicing and the rotation of the bobbin (B), the slack yarn is sucked into the suction pipe (17) in a horizontal U-shape and held. (Figure 1 dashed line).

The speed of the bobbin (B) is increased by the photosensor (67) and the means (71) (72) (
73) Controlled by.

That is, the circumferential speed of the bobbin (B) is detected by the signal from the photosensor <67>, and the detected value is detected by the delivery roller (
The rotation speed of the motor (24) is rapidly increased until it matches the circumferential speed of the bobbin (13).
Since this is done by detecting the rotation of the bobbin (B) and the friction roller (23), it is more affected by the size of the slip between the bobbin (B) and the friction roller (23) than when it is done by detecting the rotation of the friction roller (23). Therefore, the winding speed can most accurately reach a predetermined value (the circumferential speed of the delivery roller and thus the spinning speed).

Further, since the circumferential speed of the delivery roller (13) is used as the reference value, even if the spinning speed is changed, there is no need for the operator to change the reference value each time.

Then, when the circumferential speed of the bobbin (B) matches the spinning speed as described above, the switching means (74) is activated.
The control system is switched, and the rotation of the drive motor (24) is increased or decreased as follows based on the signal from the angle sensor (41).

That is, in this example, the preset angle values in the comparison means (75) are the angles θ1 and 0 in FIG.
2, and this angle θ1 is the arm (38)
The angle θ2, which is slightly smaller than the mechanical maximum rotation angle in the clockwise direction in FIG. 2, is the angle at which the thread (Y) is slightly bent, but the arm (38)
2, the command means (76) does not issue any command, and when the arm (38) turns to the right beyond θ1, the command means (76) commands the motor (24) to speed up. (in this example, increase the speed by drpm), and when the arm (38) turns left beyond θ2, the command means (76) commands the motor (24) to decelerate (decelerate by the same <4 rpm)
emits. In addition, the above angles θ, θ2 are the arms (38)
The angle is shown based on the angle at the retracted position.

Therefore, the yarn (Y
) is traversing left and right over the cone package (22), so the tension of the thread changes each time it traverses, but this tension fluctuation is absorbed by the arm (3).
8) swings from side to side to keep the tension almost constant, but due to the various reasons mentioned above, the amplitude range of the arm (38) deviates significantly in the clockwise direction in Figure 2. When the condition is reached, the angle sensor (41
) and subsequently said means (75) (76), the motor (24) is slightly increased in speed, and this arm (38)
) returns to the range between angles θ1 and 02, and conversely, when it deviates significantly counterclockwise, the motor (24)
is decelerated, and the amplitude range of this arm (38) is returned to between angles θ1 and 02.

In other words, the biasing force of the arm (38) is the mainspring spring (37).
), so if the above operation is continued to wind up the package, a constant tension will always be applied to the thread as it is wound up.

In addition, since the biasing force of the mainspring spring (37) can adjust the angle of the casing (46), the arm (38)
The tension applied to the thread can also be adjusted within a certain range.

Furthermore, if the timing at which the command means (76) issues the increase/deceleration command signal is set as follows depending on the magnitude of the increase/deceleration amount by one command signal, then the package (22)
) can be increased/decelerated more smoothly.

That is, if the amount of increase/deceleration of the motor (24) due to the -times increase/deceleration command is about 4 rpm, the arm (38)
If it deviates from the above range (θ, ~θ2) by 1 degree, the above increase/deceleration command is issued at that moment, and the angle value input from the sensor (41) is ignored for about 015 seconds after that, and after this 0.5 seconds have elapsed. After that, control is performed to return to the normal control state again, and if the amount of increase/deceleration by one command is large, the above ignore time is slightly increased, and conversely, if the increase/decelerate is small, the above ignore time is slightly reduced. Bye.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, even when winding into a cone shape on a spinning machine, tension fluctuations caused by various causes can be effectively eliminated.
Problems such as thread breakage and poor winding shape can be eliminated.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a spinning machine according to the present invention, Fig. 2 is a front view of a tensor device, Fig. 3 is a sectional view thereof, Fig. 4 is an exploded front view of a winding section, and Fig. 5 is a front view of a bobbin holder. A back view, FIG. 6 is a plan view of the pressing device on the yarn splicing carriage, and FIG. 7 is a control block diagram. (2) Spinning section winding section tensor device package Friction roller variable speed drive motor, -taper endless belt control device Tensioning arm angle detection sensor (bending 1 detection sensor) (Y) Yarn

Claims (1)

[Claims] In a spinning machine equipped with a spinning section that spins spun yarn at a substantially constant speed and a winding section that winds up the spun yarn from this spinning section, a constant tension is applied between the spinning section and the winding section. A tensor device for bending the yarn path is provided, and friction rollers for rotating the package in the winding section are rotatable independently of each weight, and variable speed drive motors are connected to the friction rollers of each weight, and The tensioner device is provided with a bending amount detection sensor for detecting the bending amount of the yarn path, and the speed of the variable speed drive motor is controlled according to the bending amount of the yarn path detected by the sensor. removal device.