JPH0718523A - Method for bobbin formation in spinning machine and bobbin formation device therefor - Google Patents

Abstract

PURPOSE:To make a bobbin in such a design as to nearly coincide with input data such as yarn length to be produced and lift length. CONSTITUTION:Prior to operation of a frame, a CPU calculates lifting times n, shaper step quantity DELTAS and the set number of revolutions Nc of a front roller based on input data such as yarn length to be produced LB and lift length Lt; based on the results, ring rails are driven and controlled. The CPU compares and assesses the set number of revolutions Nc and observed one Nr at each double stroke; in the case Nr does not coincide with Nc within an allowable range delta, the coordinate values X and Y determining the speed pattern of one double stroke are corrected. The next double stroke is operated based on the X and Y values after correction. As a result, winding level at each one double stroke comes to a proper value in accordance with the input data; at a point when the delivery from the front roller reaches to the LB value, the lift length for the corresponding bobbin becomes nearly equal to the input data value Lt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular yarn forming method and a tubular yarn forming device in a spinning machine such as a ring spinning machine and a ring twisting machine.

[0002]

2. Description of the Related Art Generally, in this type of spinning machine, the feeding speed from the front roller is set to a predetermined speed, and the yarn spun from the front roller is fitted on a spindle which rotates at a high speed at a predetermined speed. The bobbin is guided through a traveler provided on the ring rail. As shown in FIG. 6, the ring rail is moved upward by a shaper step amount ΔS while repeatedly moving up and down with a predetermined stroke (chase length C) in the axial direction of the bobbin. In this way, the yarn is wound from the lower part of the bobbin toward the upper part by winding the yarn through the traveler that moves up and down integrally with the ring rail, and the yarn is formed into a desired shape as shown on the right side of FIG. It is supposed to be done.

The yarn is a production yarn length LB wound up when the yarn is full.
And the axial width of the yarn, that is, the lift length Lt must be formed to have a preset value. Conventionally, there is a device provided with a control device for previously inputting the amount of rise of the ring rail, the amount of one-time winding, the moving speed at the time of ascending and descending, etc., and drivingly controlling the motion of the ring rail based on these input data. (For example, JP-A-62-206034). In addition, the production yarn length LB and the lift length Lt are input in advance as input data, and a control device is provided to drive and control the movement of the ring rail so as to obtain the production yarn length LB and the lift length Lt according to these input data. There is. According to this device, setting conditions such as the number of times n the lifting of the ring rail is performed based on the input data, one winding amount, and the shaper step amount ΔS are calculated in advance before the start of tube formation, and the ring is set according to the calculated setting conditions. The rail is driven and controlled. Then, when the spinning amount from the front roller coincides with the produced yarn length LB, the formation of the tubular yarn is completed.

[0004]

However, the movement of the ring rail does not always follow the set condition due to inevitable factors such as mechanical operation delay, and as shown in FIG. ) The actual required time t _r per calculation is the required time t _C based on the setting conditions.
Get bigger. As a result, since the spinning speed from the front roller is constant, the actual winding amount per double stroke, that is, the lifter delivery yarn amount Lr becomes larger than the calculated lifter delivery yarn amount Lc based on the setting conditions.
In the case of Lr> Lc, the spinning amount from the front roller reaches the production yarn length LB before reaching the set number of lifting times n. When the spinning amount reaches the production yarn length LB and the tubular yarn formation is completed, the lift length is the lift length Lt of the input data.
The smaller yarn diameter is slightly larger than the set diameter, and the produced yarn length LB and lift length Lt according to the input data are obtained.
Was difficult to obtain. Therefore, when the actual yarn is formed, the desired lift is set by empirically setting the input data of the lift length slightly larger than the desired lift length Lt in consideration of inevitable factors such as mechanical operation delay. The tubing was formed so that the length was Lt.

The present invention has been made to solve the above problems, and an object thereof is a tubular yarn in a spinning machine capable of forming a tubular yarn into a desired shape in which a production yarn length and a lift length are set as set. It is to provide a forming method and a yarn forming device.

[0006]

In order to solve the above problems, in the invention described in claim 1, the front roller is moved at a predetermined speed based on the relative movement between the traveler and the bobbin due to the vertical movement of the ring rail. In a spinning machine that winds the spun yarn around the bobbin through the traveler into a predetermined tubular yarn shape, sets the produced yarn length, lift length, and chase length of the tubular yarn as data before starting to form the tubular yarn. Then, based on the data, one reciprocating speed pattern of the ring rail required to wind the yarn into a tubular yarn shape based on the data is obtained, and when the ring rail is moved up and down based on the speed pattern. In addition, the time actually required for one reciprocating movement of the ring rail is measured directly or indirectly, and the actual setting time and the calculation setting based on the speed pattern are required. If the actual required time does not match the set required time within a predetermined range by comparing the time intervals, the speed pattern is set so that the predicted actual required time matches the set required time within the predetermined range. Was corrected, and the ring rail was moved up and down based on the corrected new speed pattern.

According to the second aspect of the present invention, a traveler for guiding the yarn spun from the front roller at a predetermined speed to the bobbin is provided, and the traveler is provided with a predetermined tubular yarn shape with respect to the bobbin. In a spinning machine equipped with a ring rail for vertically guiding the bobbin, driving means for vertically moving the ring rail, input means for inputting a production yarn length, a lift length and a chase length as data, and the input means from the input means. First storage means for storing input data, and one reciprocating speed pattern of the ring rail required to obtain a tubular thread shape corresponding to the input data based on the input data stored in the first storage means. Second storage means for storing program data for obtaining the speed, and the speed pattern based on the program data stored in the second storage means. And a direct calculation of the time actually required for one reciprocating movement of the ring rail that moves up and down based on the speed pattern calculated by the first calculation means. Comparing the actual required time measured by the measuring means with the preset required time calculated based on the speed pattern, and confirming that the actual required time matches the preset required time within a predetermined range. Determination means for determining whether or not there is a third storage means for storing, as program data, a correction formula for correcting the speed pattern so that the predicted actual required time matches the set required time within a predetermined range. If the actual required time does not match the set required time within the predetermined range based on the determination result of the determination means, the program stored in the third storage means. The actual required time predicted based on the data for correcting the speed pattern so as to coincide with the set required time and within a predetermined range 2
And the control means for driving the ring rail driving means so as to obtain the new speed pattern corrected by the second calculating means.

According to a third aspect of the present invention, in the method for forming a yarn in the spinning machine according to the first aspect, the actual time required for the n-th lifting / lowering movement of the ring rail is measured directly or indirectly. Then, the nth actual required time is compared with the set required time, and if the nth actual required time does not match the set required time within a predetermined range, the predicted (n + 1) th time is predicted. The process of correcting the (n + 1) th speed pattern so that the actual required time matches the set required time within a predetermined range is n =
The process was sequentially performed from 1.

[0009]

According to the invention of the first aspect, the production yarn length, the lift length and the chase length are preset as data before the start of forming the yarn, and the yarn is formed into a yarn shape based on the data. The speed pattern for one reciprocation of the ring rail required for winding up is obtained based on the data. Then, the ring rail is moved up and down based on the speed pattern, and the yarn spun from the front roller at a predetermined speed is wound around the bobbin via the traveler of the ring rail. At that time, the time actually required for one reciprocating movement of the ring rail is directly or indirectly measured. Then, the measured actual required time and the calculated set required time based on the speed pattern are compared, and when the actual required time does not match the set required time within a predetermined range, the predicted actual required time is calculated. The speed pattern is corrected so that the time matches the set required time within a predetermined range. Then, the ring rail is moved up and down based on the corrected new speed pattern. Therefore, even if the ring rail does not move up and down according to the speed pattern due to an unavoidable factor such as a mechanical operation delay, the required time per vertical movement of the ring rail is almost equal to the set required time, and Almost as set. Therefore, when the total winding amount reaches the set production yarn length, the lift length of the tube yarn becomes the set lift length. Therefore, a yarn having a production yarn length and a lift length as set is formed.

According to the second aspect of the present invention, the production yarn length, the lift length and the chase length are previously input as data by the input means before the start of forming the tube yarn, and the input data is stored in the first storage means. It Based on the input data stored in the first storage means and the program data stored in the second storage means, one reciprocating speed pattern of the ring rail necessary for obtaining the tubular thread shape corresponding to the input data. Is calculated by the first calculation means. The ring rail is driven up and down by the control device through the drive means based on the speed pattern, and accordingly, the yarn spun from the front roller at a predetermined speed is guided to the bobbin through the traveler. At that time, the required time actually required for one reciprocating movement of the ring rail is directly or indirectly measured by the measuring means, and the measured actual required time and the preset required time calculated based on the speed pattern are predetermined. The determination means determines whether or not they match within the range. When the actual required time and the set required time do not match within the predetermined range, the speed pattern is the actual required time predicted based on the program data stored in the third storage means. Is corrected by the second calculating means so that Then, the ring rail is driven up and down by the control device through the drive means based on the corrected new speed pattern. As a result, the ring rail moves up and down so that the actual required time required for one reciprocating movement substantially matches the set required time.

According to the third aspect of the present invention, the actual required time in the n-th ascending / descending movement of the ring rail is compared with the set required time. When the n-th actual required time does not match the set required time within the predetermined range, the predicted (n + 1) -th actual required time and the set required time match within the predetermined range. Thus, the (n + 1) th speed pattern is corrected. Then, this processing is sequentially performed from n = 1. Therefore, during the formation of the yarn, the actual required time per lifting / lowering movement of the ring rail is sequentially corrected so as to match the set required time within a predetermined range. In the data input before the start of forming the tube yarn, the same result can be obtained even if the produced yarn length is replaced with the yarn count and the yarn weight.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a ring spinning machine will be described below with reference to FIGS.

As shown in FIG. 2, the front roller 1 is a gear arranged between a driven gear 2 fitted to one end of a rotary shaft 1a thereof and a driving shaft 3 which is rotationally driven by a main motor M. It is adapted to be rotationally driven through a row (neither is shown). Further, the spindle 4 is rotationally driven via a spindle tape 6 wound around a chin pulley 5 fixed to the driving shaft 3. Both the front roller 1 and the spindle 4 are driven on the basis of the rotational force of the main motor M, so that the spinning amount from the front roller 1 and the winding amount by the spindle 4 are always equal to each other. Is set to be a predetermined ratio. Also, the main motor M
Is driven by the controller CT via the inverter 7,
The speed is controlled to a predetermined number of revolutions set in advance.

The ring rail 8 is supported at predetermined intervals by a poker pillar 9 extending in the vertical direction. A screw portion 9a having a male screw is formed on the peripheral surface of the poker pillar 9, and a nut body 10 having a female screw that can be screwed with the male screw is screwed into the screw portion 9a. A driven gear 10a is integrally formed on the lower portion of the nut body 10. A line shaft 11 is rotatably disposed at a height corresponding to the nut body 10 in a state parallel to the ring rail 8, and a drive gear that meshes with the driven gear 10a at a position corresponding to the nut body 10 on the line shaft 11. 11a is fitted and fixed. When the line shaft 11 rotates in the forward direction, the poker pillar 9 moves upward through the gears 10a and 11a and the nut body 10 to raise the ring rail 8, and when the line shaft 11 rotates in the reverse direction, the poker pillar 9 moves downward. The ring rail 8 descends.

The driving shaft 3 is operatively connected to the drive shaft 13 of the switching mechanism 12 via a gear train (not shown). The switching mechanism 12 includes three gear trains 15, 16 and 17 provided between the drive shaft 13 and the intermediate shaft 14, and the gear trains 15 to 17 include the drive shaft 13 or the intermediate shaft 14.
To the positions corresponding to the electromagnetic clutches 18, 19, 2 respectively.
0 is set. The gear trains 15 to 17 are adapted to operatively connect the drive shaft 13 and the intermediate shaft 14 when the corresponding electromagnetic clutches 18 to 20 are excited. When the lifting device is operating, only one of the electromagnetic clutches 18 to 20 is set to be in the excited state at all times, and the other two are set to be in the demagnetized state. The gear trains 15 to 17 have different gear ratios R1, R2 and R3 (R1 = 44/56, R2 = 56/44, R3 = 30/5 in this embodiment).
It is set to 6).

The output of the switching mechanism 12, that is, the rotational force of the intermediate shaft 14 is transmitted to the line shaft 11 via a gear mechanism (not shown). The line shaft 11 rotates normally when the electromagnetic clutch 18 or 19 is excited, and reversely rotates when the electromagnetic clutch 20 is excited. The ring rail 8 is an electromagnetic clutch 18
When ~ 20 is excited and demagnetized in a predetermined order, the electromagnetic clutch 1 moves up and down with a stroke corresponding to the chase length C.
Speeds V1 and V2 under excitation states 8 and 19 respectively
It rises at (V1> V2) and falls at a speed V3 in the excited state of the electromagnetic clutch 20. Then, the ring rail 8 moves up and down in a predetermined speed pattern determined by the excitation / demagnetization timing of the electromagnetic clutches 18 to 20,
It is designed to move upward little by little while repeating the vertical movement.

A ring 8a is fixed to the ring rail 8 at a position corresponding to the spindle 4, and a traveler 21 traveling on the ring 8a is arranged on the ring 8a. or,
A snell wire 22 for guiding the yarn y spun from the front roller 1 is arranged in front of the front roller 1 (on the front side of the paper surface of FIG. 2) so as to be able to move up and down in synchronization with the ring rail 8. The yarn y spun from the front roller 1 is guided by the traveler 21 that moves up and down together with the ring rail 8 via the snell wire 22, so that the bobbin B that rotates at high speed with the rotation of the spindle 4 moves from its lower portion to its upper portion. It is designed to be wound up.

A rotary encoder 23 for detecting the number of rotations of the line shaft 11 is connected to one end of the line shaft 11. A rotary encoder 2 for detecting the number of rotations of the front roller 1 is provided at one end of the front roller 1.
4 is connected. The rotary encoders 23 and 24 use a pulse signal corresponding to the number of rotations of the line shaft 11 and the front roller 1 as a detection signal, and the control device CT.
It is designed to output to.

Next, the electrical construction of the yarn forming device will be described. As shown in FIG. 3, the control device CT includes a microcomputer 25, and the microcomputer 25
Is a central processing unit (hereinafter referred to as CPU) 26 as first and second calculating means and determining means, a working memory 27 as a first storage device and a program memory 28 as a second and third storage device. It consists of The work memory 27 is a readable / rewritable memory (RAM) that temporarily stores input data and the result of arithmetic processing in the CPU 26, and the program memory 28 is a read-only memory (ROM) that stores a control program. The CPU 26 operates based on the control program stored in the program memory 28.

The control device CT has an input device 29 as an input means, and the input device 29 is connected to the CPU 26. With the input device 29, the produced yarn length LB, the lift length Lt,
Data such as the chase length C, the bobbin bare diameter DE, and the count Ne are input, and these input data are stored in the working memory 27. Rotary encoder 23,
Reference numeral 24 is connected to the CPU 26 via the input interface 30. The CPU 26 is connected to the main motor drive circuit 32 via the output interface 31, and the main motor drive circuit 32 is connected to the main motor M via the inverter 7. Further, the CPU 26 is connected to the electromagnetic clutch exciting / deactivating circuit 33 via the output interface 31, and the electromagnetic clutch exciting / deactivating circuit 33 connects the electromagnetic clutches 18 to.
It is connected to 20.

The CPU 26 calculates the position of the ring rail 8 based on the detection signal from the rotary encoder 23. Further, the CPU 26 calculates the number of revolutions Nr of the front roller 1 per one double stroke, that is, one vertical movement of the ring rail 8 based on the detection signals of the rotary encoders 23 and 24. Also, C
The PU 26 outputs the excitation / demagnetization switching signals S1 to S3 to the electromagnetic clutch excitation / demagnetization circuit 33, and the electromagnetic clutch excitation / demagnetization circuit 33 turns the electromagnetic clutches 18 to 20 on the basis of the excitation / demagnetization switching signals S1 to S3. ing.

The program memory 28 stores the routine shown in the flowchart of FIG. 1 as program data. The timing for outputting the excitation / demagnetization switching signals S1 to S3 to the electromagnetic clutch excitation / demagnetization circuit 33 is determined based on this program data. Coordinate values X and Y (X <Y) are set in the work memory 27.
The coordinate values X and Y are indicated by the position (height) of the ring rail 8 with the starting point O of one double stroke of the ring rail 8 as the origin, and the excitation / demagnetization switching signals S1 and S based on the coordinate values X and Y.
2 output timing is determined. The coordinate values X and Y are set to (X, Y) = (C / 10, 8C / 10) as initial values. With this initial value, the speed pattern of one double stroke is preset to the set speed pattern shown by the chain line in FIG. That is, as shown in the figure, with the starting point O of one double stroke as the origin, the ring rail 8 has a velocity V1 from the origin to C / 10, and a velocity V2, 8C / from C / 10 to 8C / 10. From 10 to the chase length C, the speed rises at V1. And the chase length C
It is set to descend at the speed V3 from to the start point of the next one double stroke. Then, based on the set speed pattern and the input data, the number of times of lifting n,
The shaper step amount ΔS and the rotation speed Nc of the front roller 1 per one double stroke are calculated. It should be noted that this set speed pattern is set corresponding to the speed pattern of the ring rail of the lifting device equipped with the heart cam mechanism provided in the existing ring spinning machine.

The CPU 26 outputs the excitation / demagnetization switching signal S1 when the ring rail 8 reaches the start position O of one double stroke, outputs the excitation / demagnetization switching signal S2 when the coordinate value X is reached, and again when the coordinate value Y is reached. The excitation / demagnetization switching signal S1 is output. Then, when the ring rail 8 reaches the coordinate value C, the excitation / demagnetization switching signal S3 is output, and when the ring rail 8 converted downward at the coordinate value C descends to the start point of the next one double stroke, the excitation / demagnetization switching signal S1 is output. It is designed to output.

Next, the operation of the tube thread forming device constructed as described above will be described. Input device 2 in advance before the start of forming the thread
9 produced yarn length LB, lift length Lt, chase length C,
Data such as the bobbin bare diameter DE and the count Ne are input. These input data are stored in the work memory 27.
Also, the ring rail 8 is set to the thread forming start position,
The lifting device is set to the state that it has just been activated.

The processing operation of the CPU 26 will be described below with reference to the flowchart of FIG. In step 1 (hereinafter, the step is simply referred to as S), the CPU 26 reads the production yarn length LB, the lift length Lt, the chase length C, etc. from the work memory 27. Then, based on these read data and the set speed pattern shown by the chain line in FIG. 4, the number of times of lifting n and the shaper step amount ΔS required to obtain the tubular thread shape according to the input data are calculated.
Further, the CPU 26 calculates the number of rotations Nc of the front roller 1 per one double stroke (hereinafter referred to as the set number of rotations) Nc based on the set speed pattern.

In S2, the CPU 26 starts the operation of the lifting device. That is, the CPU 26 outputs a drive start signal to the main motor drive circuit 32 to start driving the main motor M. The main motor M is driven at a preset rotational speed. Then, the CPU 26 outputs the excitation / demagnetization switching signal S1 to the electromagnetic clutch excitation / demagnetization circuit 33. As a result, the electromagnetic clutch 18 is excited and the electromagnetic clutch 18
The ring rail 8 starts to rise at the speed V1 from the tube yarn formation start position in accordance with the excitation of the above.

In S3, the CPU 26 immediately reads the coordinate values X and Y from the working memory 27 immediately after the electromagnetic clutch 18 is excited. That is, the CPU 26 reads the initial values X = C / 10 and Y = 8C / 10 as the coordinate values X and Y.

In S4, the CPU 26 calculates the position of the ring rail 8 based on the detection signal from the rotary encoder 23, and the ring rail 8 calculates the coordinate value X (= C / 1).
When the position corresponding to 0) is reached, the excitation / demagnetization switching signal S2 is output to the electromagnetic clutch excitation / demagnetization circuit 33. As a result, the electromagnetic clutch 19 is excited, and as the electromagnetic clutch 19 is excited, the rising speed of the ring rail 8 is changed from V1 to V2 (V1>
Decelerate to V2). Then, the ring rail 8 has the coordinate value Y.
When the position corresponding to (= 8C / 10) is reached, the CPU2
Reference numeral 6 denotes an excitation / demagnetization switching signal S1 to the electromagnetic clutch excitation / deactivation circuit 33
Is output. As a result, the electromagnetic clutch 18 is excited again, and the rising speed of the ring rail 8 is accelerated from V2 to V1 as the electromagnetic clutch 18 is excited. When the ring rail 8 reaches the coordinate value C corresponding to the chase length, the CPU 26
Outputs an excitation / demagnetization switching signal S3 to the electromagnetic clutch excitation / demagnetization circuit 33. As a result, the electromagnetic clutch 20 is excited, the moving direction of the ring rail 8 is changed downward due to the excitation of the electromagnetic clutch 20, and the ring rail 8 descends at the speed V3. When the ring rail 8 descends to the start point of the next one double stroke, the CPU 26 outputs the excitation / demagnetization switching signal S1 to the electromagnetic clutch excitation / demagnetization circuit 33, the one double stroke ends, and the next one double stroke is completed. Be started.

In the 1 double stroke, the speed pattern of the ring rail 8 does not always match the set speed pattern due to inevitable factors such as mechanical operation delay.
From the set speed pattern shown by the solid line to a speed pattern with a time delay. Further, the CPU 26 counts the number of pulses of the detection signal from the rotary encoder 24 during the one double stroke with a counter (not shown). In S5, the CPU 26 calculates the rotation speed (hereinafter, referred to as the actual rotation speed) Nr of the front roller 1 during the one double stroke based on the count value of the counter.

At S6, the CPU 26 determines the actual rotation speed Nr.
Is compared with the set rotation speed Nc to determine whether the actual rotation speed Nr matches the set rotation speed Nc within the allowable range δ.
That is, the CPU 26 calculates the difference | Nr-Nc | between the actual rotation speed Nr and the set rotation speed Nc, and determines whether or not the difference | Nr-Nc | is smaller than the allowable range δ. | Nr-Nc |
If <δ, the CPU 26 proceeds to S9. Also, | N
If r−Nc | ≧ δ, the CPU 26 proceeds to S7.

In S7 to S8, a process of correcting the coordinate values X and Y is performed so that the actual rotation speed Nr matches the set rotation speed Nc. That is, since the rotation speed of the front roller 1 is constant, the actual required time (hereinafter, referred to as the actual required time) tr of the single double stroke is a calculated required time of the double stroke calculated from the set speed pattern. The values of the coordinate values X and Y are corrected so as to match tc (hereinafter referred to as the set required time). Then, a new set speed pattern is determined by the corrected coordinate values X and Y.
The correction of the coordinate values X and Y is performed using the correction count x. The formula for calculating the correction factor x is derived below.

The correction processing of the set speed pattern is performed by changing the ratio of the speed V1 area (hereinafter referred to as high speed area) and the speed V2 area (hereinafter referred to as low speed area) of the ring rail 8. That is, the area widths of the two high speed areas are each multiplied by x, and the increase in the high speed areas is subtracted from the original area width of the low speed area. When there is a time delay from the set speed pattern as shown by the solid line in FIG. 4, the set speed pattern shown by the chain line in FIG. 4 is changed to the set speed pattern shown by the chain line in FIG. That is, the coordinate values X and Y are set to the initial values X = C / 10, Y = 8C / 10 to X =
Change to xC / 10, Y = (10-2x) C / 10.

According to the set speed pattern shown by the chain line in FIG. 4, the set required time tc is expressed by the following equation. tc = t1 + t2 + t3 + t4 = 3C / (10V1) + 7C / (10V2) + C / V3 (1) Further, according to the set speed pattern shown by the chain line in FIG. 5, the set required time Tc is expressed by the following equation.

Tc = T1 + T2 + T3 + T4 = 3xC / (10V1) + (10-3x) C / (10V2) + C / V3 (2) In this embodiment, each gear train 15 to 17 in the switching mechanism 13
Gear ratios of R1 = 44/56 and R2 = 56/4, respectively
4, R3 = 30/56 is set. Therefore, the speeds V1, V2 and V3 of the ring rail 8 are V1 =
(56/44) β ・ γ ・ Nm, V2 = (44/56) β
· Γ · Nm, V3 = (56/30) β · γ · Nm. Here, β is a proportional coefficient determined by the speed ratio between the moving speed of the ring rail 8 and the rotational speed of the intermediate shaft 14, and γ is a proportional coefficient determined by the speed ratio between the rotational speed of the drive shaft 13 and the rotational speed of the main motor M. , Nm are the rotation speeds of the main motor M. Therefore, from the equations (1) and (2), the required set times tc, Tc
Is as follows.

Tc = 4096C / (2464β · γ · Nm) (3) Tc = (4456-360x) C / (2464β · γ · Nm) (4) Next, the set required time tc and the actual required time tr. Ratio with (tr
/ Tc) is set to α, tr = α · tc (where α>
You can write 1). Here, the coefficient α represents the degree of delay of the actual required time tr with respect to the set required time tc. Further, since the ratio (tr / tc) between the set required time tc and the actual required time tr is equal to the ratio (Nr / Nc) between the set rotational speed Nc and the actual rotational speed Nr, the coefficient α is α = Nr / Nc expressed. Then, by actually performing one double stroke based on the set speed pattern shown by the chain line in FIG. 5, the speed pattern shown by the solid line in FIG.
It is assumed that r is delayed with respect to the set required time Tc by a delay degree equivalent to the previous one double stroke. That is, Tr =
Assume α · Tc. Then, x that makes the actual required time Tr equal to the set required time tc is defined as a correction coefficient x. That is, x that satisfies Tr = tc is set as the correction coefficient x.

From Tr = α · Tc = tc, α = tc / T
Since it is c, from the expressions (3) and (4), α = 4096 / (4456-360x) (5) Therefore, the correction coefficient x is x = (4456α−4096) / (360α) (6) It is represented by.

Thus, in S7, the CPU 26 calculates α (= Nr / Nc) from the set rotation speed Nc and the actual rotation speed Nr, and calculates the correction coefficient x from the calculated α based on the equation (6). Then, in S8, the CPU 26 calculates new coordinate values X and Y from the correction coefficient x calculated in S7. That is, the new coordinate values X and Y are (X, Y) = (X _n ,
Y _n ), and the previous coordinate values X, Y are (X, Y) = (X _n-1 ,
Y _n-1 ), new coordinate values X and Y are X _n = x · X
each of which is calculated as _{n-1, Y n = C} -2x · X n-1. Then, the CPU 26 calculates the coordinate value (X _n ,
Y _n ) is set to the coordinate values X and Y set in the work memory 27.

In S9, the CPU 26 calculates the total spinning amount L based on the detection signal from the rotary encoder 24, and determines whether the total spinning amount L has reached the production yarn length LB. The CPU 26 proceeds to S3 when the total spinning amount L does not reach the production yarn length LB, and proceeds to S10 when the total spinning amount L reaches the production yarn length LB. At the time when the first one double stroke is completed, the total spinning amount L is L << LB, so the CPU 26 proceeds to S3.

Thereafter, the CPU 26 repeats the processing from S3 to S9 until the total spinning amount L reaches the production yarn length LB in S9. Therefore, during tube formation, 1
The actual required time tr of the double stroke is the set required time tc
Within a permissible range δ, and the winding amount per double stroke is an appropriate amount for forming the yarn according to the input data LB and Lt. In addition, the elevating position of the ring rail 8 is the shaper step amount ΔS for each double stroke.
It is displaced upwards one by one. When the total spinning amount L reaches the produced yarn length LB in S9, the process proceeds to S11,
At 11, the CPU 26 stops the operation of the lifting device.

As described above in detail, according to the present embodiment, every time the ring rail 8 moves up and down, the actual rotation speed Nr of the front roller 1 per vertical movement of the ring rail 8 is measured, and the actual rotation speed is measured. If Nr does not match the set rotational speed Nc within the allowable range δ, the set speed pattern of the ring rail 8 in the next one vertical movement is such that the actual rotational speed Nr matches the set rotational speed Nc within the allowable range δ. Is corrected to. As a result, the spinning amount from the front roller 1 per one up-and-down movement of the ring rail 8 becomes an appropriate amount corresponding to the input data, and at the time when the bobbin B has finished winding the produced yarn length LB according to the input data, The lift length of the yarn substantially matches the lift length Lt of the input data. Therefore, the yarn can be formed into a desired shape in which the production yarn length and the lift length are the same as the input data LB and Lt. As a result, it is possible to provide a tubular yarn having a uniform shape formed in the production yarn length and the lift length as set.

The present invention is not limited to the above embodiments, but may be configured as follows, for example, without departing from the spirit of the invention. (1) In the data input in advance, the yarn count and the yarn weight may be used instead of the produced yarn length. In this case, the produced yarn length is calculated and set from the yarn count and the yarn weight.

(2) In the above embodiment, one of the ring rails is used.
Although it is configured to perform determination processing and sequentially correct whether or not the speed pattern is appropriate for each up / down movement, the number of determination processings can be set appropriately. For example, the determination process may be performed every predetermined number of times instead of every time.

(3) In the above embodiment, whether the required time for one double stroke is proper is indirectly determined by comparing the rotation speeds Nc and Nr of the front roller 1 per one double stroke. However, the determination may be made by directly comparing the required times tc and tr for one double stroke.

(4) The correction formula for the set speed pattern may be changed to another appropriate correction formula. (5) Instead of using a plurality of gear trains having different gear ratios for the up-and-down drive shift of the ring rail 8
The lifting device disclosed in Japanese Patent Publication No. 34 may be configured to include a differential mechanism and a motor for performing a differential input. Alternatively, the up-and-down drive speed change of the ring rail 8 may be performed using a variable speed motor capable of forward and reverse rotation.

(6) In the above-mentioned embodiment, the filling yarn is used as the method for forming the tubing, but a combination building may be used. (7) The front roller 12 and the line shaft 1 may be driven by different motors.

(8) A spinning machine other than the ring spinning machine according to the present invention,
For example, it may be applied to a ring twisting machine.

[0047]

As described in detail above, according to the present invention, there is an excellent effect that the yarn can be formed into a desired shape in which the production yarn length and the lift length are as set.

[Brief description of drawings]

FIG. 1 is a flowchart showing a processing operation performed by a CPU in an embodiment embodying the present invention.

FIG. 2 is a schematic diagram showing a configuration of a lifting device.

FIG. 3 is a block diagram showing an electrical configuration of a yarn forming device.

FIG. 4 is a graph showing a speed pattern of one double stroke.

FIG. 5 is a graph showing a corrected speed pattern of one double stroke.

FIG. 6 is a graph showing a movement trajectory of a ring rail in a process of forming a yarn in the prior art.

FIG. 7 is a graph showing a speed pattern of one double stroke in the related art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Front roller, 7 ... Inverter which comprises control means, 8 ... Ring rail, 12 ... Switching mechanism which comprises drive means, 21 ... Traveler, 23, 24 ... Rotary encoder as measuring means, 26 ... 1st and 1st CPU as 27 calculation means and determination means, 27 ... Work memory as first storage device, 28 ... Program memory as second and third storage devices, 29 ... Input device as input means,
CT: control device constituting control means, B ... bobbin, y ...
Yarn, LB ... Production yarn length, Lt ... Lift length, C ... Chase length, M ... Main motor constituting drive means.

Claims (3)

[Claims] 1. A yarn spun from a front roller at a predetermined speed based on a relative movement of a traveler and a bobbin based on a vertical movement of a ring rail so that the bobbin passes through the traveler and has a predetermined tubular yarn shape. In the spinning machine that winds up the yarn, the ring rail required to set the production yarn length, lift length, and chase length of the yarn as data before starting the yarn formation, and to wind the yarn into the yarn shape based on the data. Of 1
A reciprocating speed pattern is obtained based on the data, and when the ring rail is moved up and down based on the speed pattern, the time actually required for one reciprocating motion of the ring rail is directly or indirectly measured. However, if the actual required time is compared with the preset required time calculated based on the speed pattern and the actual required time does not match the preset required time within a predetermined range, the predicted actual required time is calculated. A method for forming a yarn in a spinning machine, wherein the speed pattern is corrected so that a time coincides with the set required time within a predetermined range, and the ring rail is moved up and down based on the corrected new speed pattern. 2. A traveler is provided which guides a yarn spun from a front roller at a predetermined speed to a bobbin, and the traveler is moved up and down in the axial direction of the bobbin so that a predetermined tubular yarn shape can be obtained with respect to the bobbin. In a spinning machine provided with a ring rail for guiding, a drive means for vertically moving the ring rail, an input means for inputting a production yarn length, a lift length and a chase length as data, and a first storage means for storing the input data from the input means. And a program data for obtaining a speed pattern of one reciprocation of the ring rail necessary for obtaining a thread shape corresponding to the input data based on the input data stored in the first storage means. Second storage means, and a first calculation for calculating the speed pattern based on program data stored in the second storage means. A step, a measuring means for directly or indirectly measuring a time actually required in one reciprocating movement of the ring rail which moves up and down based on the speed pattern calculated by the first calculating means; Comparing the actual required time measured by the means and the calculated required time based on the speed pattern,
Determination means for determining whether or not the actual required time matches the set required time within a predetermined range, and the speed pattern so that the predicted actual required time matches the set required time within the predetermined range And a third storage unit that stores a correction formula for correcting the above as program data, and if the actual required time does not match the set required time within a predetermined range based on the determination result of the determination unit, the third storage unit Second computing means for correcting the speed pattern so that the actual required time predicted based on the program data stored in the storage means matches the set required time within a predetermined range; A yarn forming device for a spinning machine, comprising: a control unit that drives the ring rail driving unit so as to obtain a new speed pattern corrected by the calculation unit. 3. The method for forming a yarn in a spinning machine according to claim 1, wherein the actual time required for the n-th raising / lowering movement of the ring rail is measured directly or indirectly, and the actual n-th time is measured. The required time is compared with the set required time, and if the n-th actual required time does not match the preset required time within a predetermined range, the predicted (n + 1) -th actual required time is set as described above. A method for forming a yarn in a spinning machine, which sequentially performs a process of correcting a (n + 1) -th speed pattern so as to match a required time within a predetermined range from n = 1.