JPH036256B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present application relates to a method and apparatus for manufacturing specialty yarns.

Conventional special yarns include slub yarn, in which the spun yarn has locally thickened knot-like slabs, and structured yarn, in which the count of the spun yarn is continuously changed over an extremely long period. There is. As shown in Japanese Patent Publication No. 38-15968, these special yarns are produced by interposing a continuously variable transmission between the back roller, front roller, and spindle, and by controlling the operation of these continuously variable transmissions. A manufacturing device in which each rod is associated with the drive shaft of a servo motor, and the servo motor is operated by a signal generator using a cam, and as shown in Japanese Patent Application Laid-Open No. 139525/1983, This is carried out using manufacturing equipment, etc., in which the cross crawler and front roller are configured to be rotatable by separate variable speed motors, and the speeds of the cross crawler and front roller are independently varied within a predetermined range. There is. However, the special yarns produced by these conventional devices are either slub yarns in which the thickness of the spun material rapidly increases locally or structured yarns in which the thickness of the spun fibers changes over a long period of time. However, due to the structure of the device, it was not possible to separately form slabs on the structure yarn, and it had not even been anticipated that knot-like slabs could be formed separately on the structure yarn. For this reason, no special yarn was known that formed knot-like slabs whose thickness locally changed in a structured yarn whose thickness changed continuously over an extremely long period.

The present invention seeks to provide a method and apparatus for producing a special yarn in which a slab is formed on a structured yarn. In this process, the feed rate of the roving from the back crawler and front roller is controlled to continuously change the thickness and number of twists to spin a structured yarn with a predetermined pattern. It is characterized by forming knot-like slabs at predetermined locations on the structured yarn by instantaneously increasing the rotation speed of the bat crawler without changing the amount of yarn feed. In addition, the device invention includes a first transmission mechanism consisting of a differential gear that controls the rotation of the entire draft part in the drive system from the main motor to the draft part by gear transmission, and a drive system from the front roller to the back roller. A second transmission mechanism for controlling the rotation of the bag crawler is disposed in the system, and each of the first and second transmission mechanisms includes:
first and second servo motors that increase and decrease the rotational speed of the transmission mechanism are arranged in parallel, and a first and second servomotor that detects the rotational speed of the drive system input to the first and second transmission mechanisms;
A second rotation detector is provided in the drive system, and the rotation of the first and second servo motors is program-controlled based on the structure yarn program and the detection signals of the first and second rotation detectors. It is characterized by being equipped with an electric control device that programmatically controls the rotation of only the motor based on a slab program.

FIG. 1 is a layout diagram showing the drive system 1 of the present application. As is clear from the drawing, in the drive system 1 from the main motor 2 to the draft part 3 by gear transmission,
A first transmission mechanism 4 and a second transmission mechanism 5 comprising differential gears are provided, and both transmission mechanisms 4, 5
Accordingly, the drive system 1 is divided into the following four parts.
That is, the first drive system 10 from the main motor 2 passes through the driving shaft 7 that rotates the spindle 6 to the gear 9 that meshes with the input gear 8 of the first transmission mechanism 4, and the output gear 11 of the first transmission mechanism 4.
and the input gear 12 of the second transmission mechanism 5. The third drive system 18 connects to the second roller 17, and the fourth drive system 22 runs from the gear 19 meshing with the output gear 11 of the first transmission mechanism 4 to the front roller 21 via the drive shaft 20. Drive system 10,
13, 18, and 22 transmit the rotation from the main motor 2 to the draft part 3 through a large number of gears that constitute each drive system, and constitute one large drive system 1 as a whole. As in the conventional method, the rotation of No. 2 is decelerated to a predetermined ratio and transmitted to the draft part 3 to continuously spin yarn of a predetermined count.

A first servo motor 23 and a second servo motor 24 are disposed in the following manner in each of the first and second transmission mechanisms 4 and 5 disposed in the drive system 1 as described above. First, the first servo motor 23
A gear 26 is attached to the shaft end of the worm wheel 25 rotated by the first servo motor 23, and a chain 29 is suspended between the gear 26 and the input gear 28 attached to the main shaft 27 of the first transmission mechanism 4. 1
The rotation of the servo motor 23 is arranged so as to be input to the first transmission mechanism 4. Next, the second servo motor 24 connects a gear 31 provided at the shaft end of the worm wheel 30 rotated by the second servo motor 24.
It meshes with the input gear 32 of the second transmission mechanism 5, so that the rotation of the second servo motor 24 is input to the second transmission mechanism 5 as described above.

Next, 33 and 34 are a first rotation detector and a second rotation detector that detect the rotation speed of the drive system 1 that is input to the first transmission mechanism 4 and the second transmission mechanism 5. is the gear 35 that constitutes the first drive system 10
The second rotation detector 34 has a gear 37 attached to the shaft 36 of the detector meshing with the input gear 12 of the second transmission mechanism 5, and each of the rotation detectors 33, 34 , detects the rotational speeds of the first drive system 10 and the second drive system 13 that are input to the first and second transmission mechanisms 4 and 5. The first and second rotation detectors 33 and 34 and the first and second servo motors 2
3 and 24 are each connected to an electric control means 39 such as a computer, and the control means 39 controls the cycle of yarn count fluctuation when forming the structured yarn 51 and the spinning or adding of the slab 52 to the structured yarn 51. A cycle program for construction, ie, a special yarn manufacturing program 50 according to the present invention is stored.

During normal operation, the rotation of the main motor 2 is transmitted to the draft part 3 via the drive system 1,
Second and front rollers 16, 17, 2
As mentioned above, 1 rotates at a predetermined rotation ratio, but at this time, the first and second transmission mechanisms 4 and 5
Each of these transmits the input rotation to other drive systems in the following manner. First, in the first transmission mechanism 4, the rotation of the first drive system 10 input to the input gear 8 loosely fitted to the main shaft 27 is caused by the rotation of the input gear 8.
The planetary gear 42 meshing with both the inner gear 40 and the sun foil gear 41 fixed to the main shaft 27 rotates the inner gear 40 formed integrally with the inner gear 4.
0 and rotates while performing planetary motion on the sun wheel gear 41, and the rotational force due to this planetary motion rotates the output gear 11 connected to the planetary gear 42 by a pin 43 and loosely fitted to the main shaft 27, The input rotation of the first drive system 10 is directly transmitted to the second drive system 13 and the fourth drive system 22.
is transmitted to rotate the front roller 21 at a predetermined rotational speed, and at this time, the main shaft 27, naturally the sunwheel gear 41, and the input gear 28 at the end of the shaft do not rotate. Next, the second transmission mechanism 5 is as follows. When the rotation of the second drive system 13 is input to the input gear 12 fixed to the main shaft 44, the main shaft 44 and the sunwheel gear 45 fixed thereto both rotate.
Due to this rotation, the planetary gear 47 meshing with both the sun wheel gear 45 and the inner gear 46 carved on the inner peripheral surface of the input gear 32 moves planetary on the sun wheel gear 45. The rotation due to the planetary motion rotates the output gear 14 which is loosely fitted to the main shaft 44 and connected to the planetary gear 47 and the pin 48, and the rotation inputted from the second drive system 13 is directly transmitted to the third drive system 18. and rotates the back roller 16 and second roller 17 at a predetermined rotation ratio.
At this time, the input gear 32 is the second servo motor 2.
Rotation is not performed due to the braking effect of the worm wheel 30 of No. 4.

In the spinning machine having the drive system 1 that connects the rotation of the main motor 2 to the draft part 3 as described in detail above, the special yarn of the present invention can be obtained by controlling the drive system 1 as follows. Now, suppose that the special thread 4 has a pattern as shown in Fig. 5.
It is assumed that the manufacturing program 50 of No. 9 is stored in the electric control device 39. That is, in FIG. 5, the thickness (count) of the spun yarn, which is spun at the standard thickness indicated by 0, is increased to the thickness indicated by +5, and after spinning a predetermined length at this thickness, After making the thread thinner by -5 than the standard thickness and spinning this thin yarn to a predetermined length, the thickness is changed to +5 again, and by continuously repeating this pattern, a structure yarn 51 is spun, and this structure yarn 51 is a program having an issuing point 53 that issues a command to construct a slab 52 at predetermined intervals.

Now, the drive system 1 rotates at a speed to spin yarn with a thickness of the reference value indicated by 0 above, and the first and second
Each of the rotation detectors 33 and 34 detects the rotation speeds of the first and second drive systems 10 and 13 that are input to the first and second transmission mechanisms 4 and 5 at this time, and sends the detection signal to the electric control device. It is sent to 39. In this state, the electric control device 39 reads a command to increase the spinning thickness to +5 shown in the program 50 and performs the next operation. As is well known, when changing the spinning count to a thicker yarn, the rotational speed of the back roller 16 is increased (of course, the speed of the second roller 17 is also increased at the same rate) to increase the amount of roving supplied, and the front This is done by increasing the rotation speed of the roller 21 to increase the spinning length per unit time and reducing the number of twists per unit length. This is done by decelerating both rollers 16,21.
Therefore, when the electric control device 39 reads the command to make the spinning yarn thicker by +5 than the reference value as described above, the first
It calculates the detected value sent from the rotation detector 33 and the shortfall in the number of rotations required to increase the speed of the front roller 21 to a predetermined speed, and issues a rotation command to the first servo motor 23 to correct this shortfall. The first servo motor 23 starts rotating, and this rotation
The signal is input to the input gear 28 of the transmission mechanism 4. This input rotates the main shaft 27 and the sunwheel gear 41 fixed thereto, and the sunwheel gear 41
The rotation of The increased rotational speed is transmitted from the output gear 11 to the second drive system 13 and the fourth drive system 22, whereby the speed of the front roller 21 connected to the fourth drive system 22 is increased to a desired rotational speed.

As the first transmission mechanism 4 performs the speed change operation as described above, the increased rotation speed is output to the second drive system 13 as described above, and this rotation speed is detected by the second rotation detector 34. Then, the electric control device 39 calculates the detected value and the shortfall in the number of revolutions of the bag crawler 16 necessary to increase the spinning thickness to +5, and issues a rotation command to the second servo motor 24.
The rotation of the second servo motor 24 is controlled by the input gear 32.
The signal is then input to the second transmission mechanism 5. When the input gear 32 is rotated by the rotation of the second servo motor 24, it meshes with the inner gear 46 of this gear, and the sun wheel gear 45 increases the speed to the standard rotation speed by the first transmission mechanism 4. The planetary gear 47, which is rotating at a rotation speed of The number of rotations is outputted to the third drive system 18, the cross roller 16 rotates at an increased speed, and the second roller 17 is naturally rotated at an increased speed at a constant rotation ratio with respect to the cross roller 16. Through the above two operations, both the back and front rollers 16 and 21 rotate at an increased speed, increasing the amount of roving supplied to the back roller 16, and speeding up the amount of yarn being spun.
Spin yarn that is +5 thicker than the standard value shown in the program.

In this way, a thick spun yarn is spun by a predetermined length, and when the electric control device 39 reads from the program that this thick spun yarn is to be made thinner by -5 than the reference value, the yarn is spun by an action opposite to that for making the thick yarn thicker. Make it thinner. That is, a deceleration rotation speed is calculated from the rotation speed detected by the first rotation detector 23, a deceleration command is issued to the first servo motor 23 to cause the motor to rotate at a deceleration rate, and this rotation is input to the first transmission mechanism 4. Second,
The fourth drive systems 13 and 22 are decelerated, the second rotation detector 34 detects the decelerated rotation of the second drive system 13, and the second servo motor 24 and the second
By operating the transmission mechanism 5 to reduce the speed of the third drive system 18, spinning a -5 thin yarn and repeating this operation continuously, the structure yarn 51 is produced according to the program input to the electric control device 39.
is spun out.

Next, the operation of synthesizing the slab 52 with the structure yarn 51 spun as described above will be explained. As is well known in the conventional spinning of the slab 52 (the method of combining the slab with the structure yarn has not been carried out conventionally), the rotation of the front roller is momentarily stopped during the spinning operation to stop the drafting operation. However, the spinning of the slab 52 in the present application is performed by retaining the sent roving on the front roller, but the spinning of the slab 52 in the present application is performed using the back crawler that is spinning the structured yarn 51 as described above. The rotation speed of the roller 16 is instantaneously increased to increase the feed amount of the roving by the cross crawler 16, and the roving that has been sent is transferred to the draft part 3.
This is done by temporarily lowering the draft ratio. That is, as shown in FIG. 5, the slab spinning command point 53 is stored at a required location in the manufacturing program 50 for the structure yarn 51, and when the electric control device 39 reads this, it commands the second servo motor 24. A program is set up to increase the speed of only the rotation of the second servo motor 24 at a predetermined rate for a predetermined time as shown at 53 in FIG. . Therefore, in the special yarn 49 of the present invention in which the structure yarn 51 and the slab 52 are synthesized, the electric control device 39 performs slab spinning while the structure yarn 51 is being spun while controlling the drive system 1 as described above. When the output command point 53 is read, a command is issued to the second servo motor 24 to increase the speed of the second servo motor 24 at a predetermined rate for a predetermined period of time, and naturally this speed increase is input to the second transmission mechanism. This is transmitted to the third drive system 18, and rotates the back roller 16 (naturally, the second roller 17 as well) at an increased speed of +α compared to the rotational speed at which the structured yarn 51 is spun.
If the speed of the back roller 16 is increased in this way, the amount of roving sent by the roller 16 will naturally increase, but since the rotation speed of the front roller 21 is not increased, the increased amount of roving will be transferred to the draft part 3. The structure yarn 51 is stored in the interior and the draft ratio is reduced, and the structure yarn 51 is spun as described above.
The slab 52 is synthesized, and the special yarn 49 according to the present invention is spun.

In implementing the present application as described above, the electrical control device may be any device, such as a computer, as long as it can control the transmission mechanism as described above based on the detected value of the rotation detector. Although the draft part shown is a three-line system, it goes without saying that there is no problem in applying the present application even if the draft part is a four-line five-line system.

As described above, in the present invention, a structured yarn is spun by controlling the feed amount of the roving from the back roller and the front roller to continuously change the spinning thickness and number of twists in a long cycle. During spinning, the rotation speed of the bat crawler is instantaneously increased to form knot-like slabs without changing the feed rate of the roving from the front roller, so the thickness and number of twists are continuous over a long period. A special spun yarn can be produced in which knot-like slabs are formed at predetermined locations on a structured yarn that has changed to a textured yarn, and the pattern of the structured yarn of this special yarn and the pattern of the slabs combine to create a unique feel. The fabrics woven using this yarn can have textures and patterns that have never been seen before, making it possible to obtain products of extremely high value. In addition, since the slab is formed by increasing the feed rate of the roving of the cross crawler, it is possible to form a slab that is softer and fuller than when the front roller is stopped and the slab is formed. It is possible to obtain a voluminous texture in the woven fabric. In addition, the formation of slabs is carried out by instantaneously increasing the rotation speed of the back roller without changing the feed rate of the roving by the front roller, so even if slabs are formed separately on the structured yarn, special There is an effect that the thread device can be reliably performed with a simple device.

Further, in the present invention, the first and second servo motors are program-controlled based on the structure yarn program and the detection signals of the first and second rotation detectors, and the rotation of only the second servo motor is controlled. Since the special yarn is manufactured by program control based on the slub program, spun yarn with a desired pattern of slabs formed on the desired pattern of the structured yarn can be manufactured accurately and with a simple device, making it possible to produce woven fabrics. This has the effect that a desired pattern can be expressed.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an explanatory diagram of the arrangement of the drive system of the present invention, FIG. 2 is a sectional view of the first transmission mechanism, FIG. 3 is a sectional view of the second transmission mechanism, and FIG. 4 is a sectional view of the second transmission mechanism. FIG. 5 is an enlarged view of the special yarn spun in the process, and FIG. 5 is an explanatory diagram of the program input to the electric control device. 1... Drive system, 3... Draft part, 4...
First transmission mechanism, 5... Second transmission mechanism, 10... First drive system, 13... Second drive system, 16... Back crawler, 18... Third drive system, 22... Fourth drive system , 23...first servo motor, 24...second servo motor, 33...first rotation detector, 3
4...Second rotation detector, 39...Electric control device,
49... Special yarn, 51... Structured yarn, 52... Slab.

Claims (1)

[Claims] 1. In order to produce yarn by drafting and spinning the roving by a draft part equipped with a cross crawler and a front roller, and twisting the spun fleece by rotation of the spindle, A microcomputer stores a program of control data representing the pattern of count change related to the length of the special yarn to be manufactured and control data representing the pattern of slab change, and measures the length of the yarn to be spun. Then, based on the length measurement signal, the rotational speed of the cross crawler relative to the front roller is continuously changed to change the thread count based on the control data of the program representing the above-mentioned count change pattern, and the front roller rotates the spindle. By continuously changing the rotational speed of the yarn, the number of twists of the yarn is changed in accordance with the count to spin a structured yarn corresponding to the count change pattern, and during the spinning, the yarn is twisted based on the length measurement signal. Then, the rotational speed of the back roller is instantaneously increased without changing the rotational speed of the front roller according to the control data of the program representing the slab change pattern to form a knotted slab corresponding to the above slab change pattern. A method for manufacturing special yarn. 2 Has a cross crawler and a front roller,
A draft part that drafts and spins the roving,
In a yarn manufacturing device equipped with a constant rotation spindle that rotates the fleece spun from the draft part and winds it around the outer circumference of the bobbin, the entire draft part is connected to the drive system from the main motor to the draft part by gear transmission. A first transmission mechanism consisting of a differential gear is provided to control the rotational speed of the
A second transmission mechanism is disposed to control the rotation speed of the back roller from the front roller, and first and second servo motors are disposed in each of the first and second transmission mechanisms to increase or decrease the rotation speed of the transmission mechanism. At the same time, first and second rotation detectors are installed in the drive system to detect the number of revolutions of the drive system input to the first and second transmission mechanisms. It is possible to store a program of control data representing a pattern of change in count and a program of control data representing a pattern of change of slab, and based on these stored programs and the detection signals of the first and second rotation detectors, 1. A special yarn manufacturing device comprising an electric control device that programmatically controls the rotation of the second servo motor and also programmatically controls the rotation of only the second servo motor based on a slab program.