JP2888424B2 - Roving winding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for winding a roving in a roving machine.

[0002]

2. Description of the Related Art Conventionally, a full bobbin wound with a roving machine (hereinafter referred to as a full bobbin) is suspended on a bobbin carriage, conveyed to a spare spinning creel rail, and consumed by the spinning creel. Replace bobbin with full bobbin of spare rail,
A roving bobbin automatic transfer system is known in which a roving stripper removes the remaining roving from a small ball bobbin with a roving stripper and returns it to the roving machine as an empty bobbin. In this system, Shinotsu is automatically performed on a spinning creel consisting of two rows on one side (Japanese Patent Application Laid-Open Nos. Sho 62-53425 and 64-52828). In the outlet position, the outlet nozzle of the Shinotsu device performs a suction operation in opposition to the outer periphery of the full bobbin taken down to the lower position at a predetermined height position. For this reason, when the roving end of the full bobbin is taken down to the lowered position of the shino splicing device, the pouring operation is not performed properly unless the roving end is at a height position facing the suction port of the pouring nozzle at the pouring position. For this reason, conventionally, when winding on a full bobbin using a roving machine, the machine stand is stopped when the overall length of the roving exceeds the target value and returns to the height position again.

[0003]

According to the above, the height of the bobbin rail when the total length of the roving reaches the target value is not constant due to an error in the roving winding tension and the like. In addition, after the full load is stopped, the bobbin rail is lowered for doffing.Therefore, there is a case where the bobbin rail is stopped halfway up in order to prevent the bobbin rail from being moved up and down during the descent. At that time, when the bobbin rail has reached the full length just after passing the height position during the ascent of the bobbin rail,
In the spinning state, the bobbin rail will then make approximately one more reciprocation and stop at the level. When the roving length is set to 70 to 80 yards, the winding amount for one reciprocation (for two layers) is considerably extra wound, and this maximum variation has occurred in the full bobbin for each doffing. By the way, since the Shino splicer simultaneously sprinkles at least one row of creels on one side of the spinning creel on both sides of the spinning machine at the same time, the number of full bobbins prepared in advance on the spare rail is one of the number of spindles of the spinning machine. / 2. For example, the number of spindles of the spinning machine is 8
When set to double, full bobbins for four doffings of the roving machine are prepared on the spinning spare rail. At this time, since the full bobbin length of the full bobbin varies considerably as described above, the residual roving amount when the bobbin becomes a small bobbin varies greatly. When processing the small bobbin with the remaining roving amount in this way with the low-bin stripper, the processing time must be set according to the small bobbin with a large amount of the remaining roving, and the bobbin stripping time becomes longer, and the efficiency is reduced. bad. In addition, the residual roving may remain for several tens of yards, and the amount of roving spun at the angle is likely to increase.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a roving machine in which a bobbin rail is lifted and lowered in a bobbin body winding section.
It is configured to be switchable, and at an appropriate timing until the bobbin becomes full, the remaining spinning length is calculated from the spinning length at that time and the preset full length, and the roving yarn is preliminarily calculated from that time. Calculate the roving length of several layers when winding up for the set number of layers, compare the remaining spun length with the roving length of the several layers, and determine that the remaining spun length is less than the roving length of the several layers. When the bobbin rail is reached, the final roving end height position at the time of full bobbin is predicted and calculated, and the lifting / lowering switching position of the bobbin rail is calculated based on the calculation result and the preset roving end target height position. The switching of the bobbin rail up / down is controlled in the bobbin body winding section without changing the layer pitch so that the end height position becomes the target height position. As a result, the waste of the spun roving is reduced, and the work of extracting the roving for the splicing is facilitated.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS When a bobbin rail is moved up and down to form a bobbin, an appropriate timing until a bobbin becomes full,
For example, at the timing of the vertical switching at the upper and lower shoulders, the remaining spinning length is calculated from the spinning length at that time and the preset full length, and the roving is divided into a predetermined number of layers (from that time). The roving length of several layers at the time of winding (for example, two layers) is calculated, and the remaining spinning length is compared with the roving length of the several layers. When the remaining spinning length has reached the roving length of the several layers or less, the final roving end height position at the time of full bobbin is predicted and calculated. Based on the calculation result and the preset roving end target height position, the lifting / lowering switching position of the bobbin rail is calculated, and based on the calculation result, the final roving end height position at the time of full bobbin is set to the target height position. Thus, the position at which the bobbin rail is moved up and down is controlled without changing the layer pitch .

[0006]

FIG. 1 shows a drive mechanism of a cone drum type roving machine. As is well known, the draft part 7 of the roving machine is rotationally driven by a main motor (not shown) via a belt transmission mechanism and a gear train, and the flyer 12 is also rotationally driven by the main motor via a belt transmission mechanism and a driving shaft. It is so. Also bobbin wheel 2
Reference numeral 1 denotes a rotary drive driven by a well-known cone drum type continuously variable transmission which is driven to rotate by a main motor, and the belt is moved by the movement of the long rack 228 so that the speed is changed.

Next, the bobbin rail 20 is moved up and down to a position near the full tube by a known operation of the bobbin forming apparatus 210. The bobbin forming apparatus 210 tilts the stag horn 211 via the rack anchor bar bracket 217 and the rack anchor bar 216 by lowering the bobbin rail 20, for example, and the tilt causes one end of the beam 221 via one of the chains 219 and the rod 220. Is pulled up against the spring 222, the levering bracket 214 is urged clockwise through the other rod 220a, and the pressing screw 215 is tilted by the stag horn 211.
a disengages the swallow tail catch 213a from the reversing bracket 214 and removes the reversing rod 2
By pushing 18 to the left, the levering bevel gear 224 is switched, and the ascending and descending direction is switched. The rack anchor bar 216 is sent in the axial direction by a pinion shaft 226 rotated by a control motor 227 for moving the long rack 228 through a not-shown bevel gear, a support shaft 212, and a pinion 212 a integral with the support shaft 212. The elevation height of the rail 20 is gradually shortened, and a shoulder is formed. The control motor 227 feeds the long rack 228 in consideration of a tension signal from the roving yarn tension detecting device RT, and is known in Japanese Patent Application Laid-Open No. 62-8979. 215 is a left pressing screw, 213 is a left swallow tail catch, 223 is a frame, and 219a is a right chain.

[0008] Biasing cylinders 230, 230a capable of pushing up the beam 221 upward are provided on the frame 22 below and to the left and right of the beam 221 of the bobbin forming apparatus 210.
3 is attached. The stroke of the piston rod of the urging cylinders 230 and 230a is set to a stroke that can be pulled up by the chain 219 (219a) at the ascending or descending end of the bobbin rail 20 and push up the beam 221 to the beam position immediately before switching. is there. Below the swallow tail catches 213 and 213a, detection switches 231 and 231a for confirming the change of the elevation are arranged. On the upper side of the swallow tail catches 213 and 213a, a lifting / lowering switching cylinder 232,
232a is provided. The control device 100 includes a central processing unit CPU 102, a read-only memory ROM 103,
A rewritable memory RAM 104 and a bobbin winding diameter area 1 for storing the bobbin winding diameter for a predetermined layer from the present time to the past.
14 and stores the program according to the flowchart shown in FIG.
6 shows data indicating the bobbin winding diameter shape (upper and lower shoulders B
1, B2, a functional expression l ₁ = f ₁ (D), l ₂ = f
₂ (D), layer pitch h, roving target height position Ye, full length Le ± a yards), height data for classification of final roving end height position (B zone, C shown in FIG. 3) Data indicating the zone and the permissible zone Z, the permissible zone Z indicates the range of the full length Le ± a), the spinning conditions, etc., and the roving tension signal from the roving tension detecting device RT;
Lifting switching confirmation signal from the detection value and the detection switch 231,231a corresponding to the height position Y ₁ of the bobbin rail from the encoder PG3 is are to be input. Further, operation commands for the urging cylinders 230 and 230a and the lift switching cylinders 232 and 232a are output.

Next, the operation will be described with reference to the flowchart shown in FIG. The bobbin rail 20 goes up and down with the start,
The long rack 228 is connected to the control motor
At this time, the pinion 212A is rotated by the rotation of the pinion shaft 226 to shorten the rack anchor bar 216, and the ascending and descending distance of the bobbin rail 20 is gradually shortened, thereby forming the shoulder of the roving bobbin. In step P1, the roving yarn R is wound in this way, and in step P2, it is determined whether or not the up / down switching has been performed based on the signals from the detection switches 231 and 231a. The remaining spinning length calculated from the current spinning length to be set and the preset full length is 2 when a predetermined number of layers, for example, two layers are wound from the present time.
Is compared with the roving length layer fraction, the remaining spinning length L ₂ to determine whether a following final two-layer length. The final two layer lengths are the current bobbin winding diameter, average layer thickness Δda, and shoulder thickness calculated from the detection values of a position detector (not shown) that measures the cone belt position (eg, an encoder that measures the rotation amount of the control motor 227). The prediction calculation is performed based on the shape data. Next, in Step P4, the roving end height position Yn when the tube is full is calculated. Assuming that the bobbin is wound with the average layer thickness Δda, the bobbin winding diameters D ₁ and D ₂ can be predicted, so that the final roving end height position Yn
Is calculated at the switching position B1a at the upper shoulder B1 from the lowering to the raising of the bobbin rail 20 (FIG. 3 (1),
(3)) Yn = f ₂ (D ₂ ) −h · (L ₂ −L ₁ ) / (π · D ₂ ) The calculation is performed at the switching position B2a at the lower shoulder B2 from the rise of the bobbin rail 20 to the fall. Case (FIGS. 3 (2), (4)) Yn = f ₁ (D ₂ ) + h · (L ₂ −L ₁ ) / (π · D ₂ ) However, the next bobbin winding diameter D ₁ (one last layer before) ), The final bobbin winding diameter D ₂ L ₁ = π · D ₁ (f ₂ (D ₁ ) −f ₁ (D ₁ )) / h. As shown in FIG.
Corresponds to the upper end of the roving winding of the bobbin 15, and the coordinate direction is plus from the origin 0 of the roving bobbin downward.

Next, at step P5, it is determined whether or not the result of the calculation at step P4 is within the permissible zone Z. If so, the first lifting / lowering switching is performed after the calculation, and then the bobbin rail lift / lower from the encoder PG3 is performed. The machine is stopped when the position signal reaches the target height position Ye. When deviating from the permissible zone Z, the winding direction of the roving in the final winding layer (whether the roving is wound from the top to the bottom with respect to the bobbin 15) and the final roving end height position Yn are set to B zone or C zone. In the zone, 4
Two cases occur. On the winding direction of the roving from the lower, stopping in B zone (in Fig. 3 (1)) last lift switching position Yr to the Yr, the amount wound bobbin winding diameter D ₂ between Yn and Ye, bobbin between Yr Diameter (D ₂ +2
The relationship where the winding amount is the same in Δda), and D ₂ and (D ₂ +2)
Assuming that Δda) is substantially equal, the approximate expression Yr = (Ye + Yn) / 2 is obtained. Hereinafter, in the same way, the winding direction of the roving is stopped from the top to the bottom in zone B ((2) in FIG. 3). Yr = f ₁ (D ₂ ) + (Ye−Yn) / 2 The winding direction of the roving Stops from bottom to top and in zone C (FIG. 3 (3)) Yr = f ₂ (D ₂ ) + (Ye−Yn) / 2 The roving direction is stopped from top to bottom and in zone C (FIG. 3). (4)) Yr = (Ye + Yn) / 2 Yn is substituted for the condition corresponding to these equations to calculate the final lifting / lowering switching position Yr in Step P6.

Then, in step P7, (1a) of FIG.
In (4a), after the computation at the switching positions B1a, B2a , respectively, after one-time up / down switching is mechanically performed, and in (2a), (3a) of FIG. , Urging cylinder 23 corresponding to the vertical direction
0, 230a, and one end of the beam 221 is pushed up by the piston rod. For example, in the case of (1) in FIG. 3, after the calculation, the roving is wound from top to bottom, and then the winding direction is switched from bottom to top. At this time, the state shown in FIG. 1 is obtained. The left end of the beam 221 is pushed up to the position indicated by the two-dot chain line by the urging cylinder 230 on the left side up to the final lifting switching position Yr. Thereby, the reversing bracket 21
4 has a rod 220a by the force of a spring 222.
However, since the swallow tail catch 213a is engaged with the reversing bracket 214, the reversing bracket 214 cannot swing clockwise.

[0012] When the vertical position signal of the bobbin rail 20 from the encoder PG3 is a final lifting switching position <br/> location Yr in step P8, the switching cylinder (in this case, the right one) in Step P9 actuates the 232a The engagement between the swallow tail catch 213a and the levering bracket 214 is released. As a result, the levering bracket 214
Swings instantaneously in the clockwise direction, causing the leversing rod 218 to rotate.
Moves to the left, the levering bevel gear 224 switches, and the bobbin rail 20 switches from descending to ascending. Therefore, the roving direction of the roving is switched in the middle of the bobbin body as shown in FIG. 3A, and the machine stand is stopped when the lifting position signal from the bobbin rail 20 reaches the target height position Ye. .
In this embodiment, since the final ascent / descent switching position Yr is calculated based on the extremely short remaining spinning length after switching to the second layer before full filling, the ascent / descent switching is performed at the final ascending / descending switching position Yr. Then, by stopping at the target height position Ye, the full tube length can be made to approach the median of the allowable range of the set value with an extremely small error. It is also possible to calculate the final roving end height position Yn three layers before or four layers before the full tube is filled, and switch the vertical position at the final vertical switching position Yr. Further, in the cases of (1a) and (2a) of FIG. 3, the up-and-down switching can be performed at the body winding portion so that the final roving winding direction is from bottom to top. The roving winding method of the first embodiment can also be performed by a bobbin forming apparatus of a type in which a bobbin speed is changed using a servomotor without using a cone drum.

Second Embodiment Next, a switching mechanism (chain 219) for instantly switching the levering bracket 214 of the bobbin forming apparatus 210 of FIG.
(219a), rod 220 (220a, beam 221)
And a different mechanism replacing the spring 222) will be described with reference to FIG. In this example, the levering bracket 21
4, a pair of pneumatic biasing cylinders 2 at the lower left and right sides, respectively.
30b and 230c are provided, and pins 241 and 241a attached to the upper part of the piston rod are respectively engaged with the left and right ends of the levering bracket 214. For example, when the stag horn 211 swings clockwise, compressed air is supplied to the urging cylinder 230c in a direction to retract the piston rod, and the urging cylinder 230b keeps the piston rod protruding. The pin 241a of the urging cylinder 230c pushes the right end of the levering bracket 214 downward, but cannot engage clockwise because of engagement with the swallow tail catch 213a.
The upper pressure chamber of 0c is stored with compressed air. During normal bobbin molding, the swinging of the rack anchor bar 216 causes the pressing pin 215a of the stag horn 211 to disengage the swallow tail catch 213a from the reversing bracket 214, and the elevation switching at the bobbin body winding section is the elevation switching This is performed by the cylinder 232a (or 232). When the swallow tail catch 213a is disengaged from the levering bracket 214, the compressed air stored in the urging cylinder 230c acts as a spring to instantly swing the levering bracket 214 clockwise, The vertical direction of the bobbin rail 20 is switched.

Third Embodiment FIG. 6 shows a third embodiment in which a single urging cylinder 230d is used in place of the pair of urging cylinders shown in FIG.
Here, the piston rod of the urging cylinder 230d is connected with a pin. Compressed air is alternately supplied to the front or rear pressure chamber of the urging cylinder 230d so as to urge it in the next desired switching direction, and the pressure is accumulated.

[0015]

As described above, according to the present invention, the bobbin cylinder
The winding direction of the bobbin rail can be switched at the winding section.
At the appropriate timing until the bobbin becomes full, the remaining spinning length at that time and the roving winding length of several layers from that time are calculated, and the remaining spinning length is equivalent to several layers. The bobbin rail up / down switching position is calculated based on the final calculated roving end height position and the preset roving end target height position that are predicted when the roving winding length is reached, and the layer pitch is determined based on the calculation result. bobbin lifting switching of the bobbin rail so that the final roving end height position is the target height position without changing wrapping
In a bobbin lead type roving machine in which the bobbin rail is switched by raising and lowering the bobbin rail in accordance with the vertical switching position for bobbin winding, the bobbin rail is also raised and lowered at the bobbin body winding section. Direction
It is configured to be switchable, and at the set height position of the bobbin rail, the remaining spinning length is calculated from the spinning length at that time and the preset full length, and the remaining spinning length is calculated from that point as roving yarn. Is compared with the roving length of several layers when winding up a predetermined number of layers, and when the remaining spinning length has reached the roving length of the several layers or less, the final roving end height at full bobbin The position of the bobbin rail is calculated based on the calculation result and the preset roving end target height position, and the final roving end height position is changed to the target height position without changing the layer pitch. Is controlled at the bobbin body winding part so that the final roving end height position when the bobbin is full can be kept at a fixed position, and the roving The remaining roving yarn is wasteful because it is easy to take out the end and the roving amount of the roving yarn can be made constant length. A it can be reduced.

[Brief description of the drawings]

FIG. 1 is a drive mechanism diagram of a roving machine suitable for carrying out the method of the present invention.

FIG. 2 is a flowchart illustrating a control program of FIG. 1;

FIG. 3 is an explanatory diagram of a correction of an elevation switching position.

FIG. 4 is a view showing a bobbin.

FIG. 5 is an explanatory view showing another example of the bobbin forming apparatus.

FIG. 6 is an explanatory view showing another example of the bobbin forming apparatus.

[Explanation of symbols]

 12 Flyer 15 Bobbin 20 Bobbin rail 100 Control device Yn Final roving end height position Ye Target height position

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideki Hashimoto 1-2-1 Ishiodai, Kasugai-shi, Aichi Prefecture 130-1 Town Ishiodai (72) Inventor Makoto Omori 6-24 Minamihonmachi, Tsushima-shi, Aichi Prefecture (72) Inventor Kenji Sasaki 82, Brahma, Fujishima-cho, Komaki-shi, Aichi Prefecture Referee, Shinichi Tamaki, Referee Judge Sato Yukie, Referee Kiyohisa Otsuki (56) References JP 1-250423 (JP, A)

Claims (2)

(57) [Claims] For 1. A coarse yarn winding, in Rovers bobbin lead expressions for bobbin molding by switching the lifting of the bobbin rail in response to lifting the switch position, even in the bobbin wrapping unit
The lifting direction of the bobbin rail is configured to be switchable, and at an appropriate timing until the bobbin rail becomes full, the remaining spinning length is calculated from the spinning length at that time and the preset full length, and the From the point in time, calculate the roving length of several layers when winding up a predetermined number of layers of roving, compare the remaining spinning length with the roving length of the several layers, and calculate the remaining spinning length of several layers. When the length of the bobbin rail is less than or equal to the minimum roving length, the final roving end height position when the bobbin is full is predicted and calculated. calculated, the bobbin trunk lifting switching of the bobbin rail such that the final roving end height position becomes the target height position without changing the Reyapitchi
A roving yarn winding method characterized in that control is performed in a winding section . For 2. A crude yarn winding, in Rovers bobbin lead expressions for bobbin molding by switching the lifting of the bobbin rail in response to lifting the switch position, even in the bobbin wrapping unit
The lifting direction of the bobbin rail is configured to be switchable, and the remaining spinning length is calculated from the spinning length at that time and the preset full length at the set height position of the bobbin rail, and the remaining spinning length is calculated. Is compared with the roving length of several layers when the roving is wound up by a predetermined number of layers from that time, and when the remaining spinning length has reached the roving length of the several layers or less, the full bobbin time The final roving end height position is predicted and calculated, and the bobbin rail up / down switching position is calculated based on the calculation result and the preset roving end target height position, and the final roving end height is maintained without changing the layer pitch. A method for winding a roving yarn, characterized in that switching of lifting and lowering of a bobbin rail is controlled in a bobbin body winding section so that the position is at a target height position.