JPH0813261A - Method for stopping full bobbin in roving frame - Google Patents

Abstract

PURPOSE:To minimize an error of total spun length from a set length and an error of a suspension position of roving end from a set suspension position by outputting a suspension order of a frame by a timing which is shorter by roving spun length of inertia and is ahead by a lifting and lowering amount of inertia of a bobbin rail. CONSTITUTION:In suspension of full bobbins in a roving frame, spun roving length is detected by an encoder 54, inputted to a control device 60 and a frame stopping command is outputted at a timing when the accumulated spun roving length is shorter by precalculated spun length of inertia to minimize an error of the total spun roving length from a set full bobbin length. The spun length of inertia is calculated from a time required from the output of a frame stopping command based on a spinning speed and a spinning state at the speed till the complete suspension of the frame. A frame stopping order is outputted at a timing when the set full bobbin length is ahead by a lifting and lowering amount of a bobbin rail 10 calculated from a time required from the output of a frame stopping command based on a lifting and lowering speed obtained by detecting a lifting and lowering position of the bobbin rail 10 and a spinning state at the speed to complete suspension of the frame minimize an error of a suspension position of roving end from a fixed suspension position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin rail which detects a spun roving yarn length and, when the roving yarn length reaches a preset full pipe length, causes the roving yarn end to be in a predetermined proper position. The present invention relates to a method for stopping the full spinning of a roving frame by changing the up / down switching position.

[0002]

2. Description of the Related Art In recent years, spinning mills have been automatically performed in the spinning process in a spinning factory in order to save labor.
It is required that the final roving yarn end of the full roving yarn bobbin to be produced be located at a predetermined proper position. Furthermore, in order to reduce the residual roving yarn, the roving yarn length wound on one roving yarn bobbin is However, it has been required to set the number of full-filled yarns in the spinning process to a predetermined number (a predetermined length). As a method for stopping the full spinning of a roving spinning frame that satisfies the above two requirements, for example, as disclosed in Japanese Patent Application Laid-Open No. 3-180525 by the present applicant, the measured spinning length is close to a preset full spinning length. At that time, the total spinning length becomes the set full pipe length when the pipe is stopped, and
Predictive calculation of the bobbin rail up / down switching point such that the roving end is located at a predetermined appropriate position is performed, and then the bobbin rail is switched up / down at the predicted up / down switching point. There was something that I tried to output.

[0003]

In the above-described conventional method for fully stopping the rough spinning machine, as shown in FIG. 4, the roughing caused by the coasting operation from when the machine stand stop command is output until the machine stand is completely stopped. Since the inertial spinning length of the yarn and the inertial lifting amount of the bobbin rail were not taken into consideration, the spinning length was longer than the set full pipe length or the roving yarn end was displaced from the proper position by the amount of inertia U. There was a problem.

[0004]

SUMMARY OF THE INVENTION In view of the above, the object of the present application is to perform a full pipe stop in consideration of the inertial spinning length and the bobbin rail inertial lift amount caused by the inertial operation of the machine base when the machine base is stopped. To provide a method. In order to achieve this object, according to claim 1, at a spinning timing shorter than the full pipe length by an inertial spinning length of a roving produced by inertial operation from the time of outputting a machine stand stop command until the machine stand is completely stopped. And outputting a machine stop command,
Then, the inertial spinning length is calculated from the spinning speed and the stop time required to completely stop the machine base from the spinning state at the spinning speed, and in the bobbin rail according to claim 3, Bobbin caused by inertial operation from the output of the machine stop command to the complete stop of the machine base from the ascending / descending speed and the stop time required to completely stop the machine base from the spinning state at the ascending / descending speed. At the timing just before the full pipe length is calculated and the bobbin rail up / down position before this is the up / down amount with respect to the proper position of the bobbin rail, the machine stop command is calculated. It is characterized by outputting.

[0005]

According to the first aspect of the invention, the error between the total spinning length and the set full pipe length when the pipe is stopped is the minimum value. In the invention of claim 2, the value of the inertial spinning length of the roving becomes a more appropriate value. According to the third aspect of the invention, the error between the stop position of the roving yarn end and the predetermined proper position when the full pipe is stopped becomes a minimum value.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a full pipe stopping device of a roving machine of the present application will be described with reference to the drawings. In FIG. 1, a front roller 3 of a draft device 2 is rotationally driven from a main motor M1 via a belt transmission mechanism and a gear transmission mechanism which are simplified and shown by lines. In addition, the drive shaft 4 provided in this transmission mechanism
The driving gear 5 fixed to the driven gear 7 on the flyer 6 is
And the flyer 6 is driven to rotate.
On the other hand, a bobbin shaft 13 having a gear 12 meshing with a bobbin wheel 11 rotatably supported on a bobbin rail 10 is connected to a speed change shaft 15 of a differential gear 14 via a universal joint and a gear transmission mechanism. There is. The rotation of the rotary shaft 16 driven by the main motor M1 and the rotation of the rotary shaft 20 driven by the control motor M2 via the electromagnetic clutch 80 are combined and transmitted to the speed change shaft 15 by the differential gear 14. I am doing it.

Further, the bobbin forming device 3 is attached to the gear 22 that meshes with the lifter rack 21 fixed to the bobbin rail 10.
The rotation of the control motor M2 is transmitted through the 1-up / down switching unit 23. The up-and-down switching unit 23 is provided with a pair of driven gears 81 and 82 having clutch teeth on opposite sides, and these driven gears 81 and 82 are controlled by the driven gear 82 meshing with an intermediate gear 84. The motors M2 rotate in opposite directions. Driven gear 8
A switching wheel 86 rotatably attached to the moving shaft 85 is arranged between the first and second gears 82, and a gear 87 meshed with the switching wheel 86 is connected to the bobbin rail lifting gear 22. The lever moving rod 44 connected to the moving shaft 85 is axially switched and moved by a switching moving device 88. This switching movement device 88 is provided with a pneumatic cylinder 9 that urges the lever shing rod 44 in the axial direction.
0, and a braking device 91 that applies a braking force to the levering rod 44. This brake device 91
Is a piston 93 that is movable by air pressure, a spring 94 that biases the piston 93, and a ball 9 that can hold the leversing rod 44 by the movement of the piston 93.
5 and. Pneumatic cylinder 90 and brake device 9
The air supply to 1 and 1 is switched by respective electromagnetic valves 96 and 97.

Therefore, when air is supplied to the brake device 91 while air is supplied to the cylinder chamber on the right side of the pneumatic cylinder 90 and the lever shing rod 44 is biased to the left side, the ball 95 releases the braking force. Lever moving rod 44 is moved instantaneously. By the movement of the lever shing rod 44, the switching wheel 86 meshes with the driven gear 81 to reverse the switching wheel 86 and the gear 87, and the bobbin rail 10 can be switched in the upward direction. Also,
Thereafter, when air is supplied to the brake device 91 in a state where air is supplied to the cylinder chamber on the left side of the pneumatic cylinder 90 and the leversing rod 44 is urged to the right side, the bobbin rail 10 is similarly switched to the descending direction. You can

Next, an encoder 54, which is connected to the rotary shaft of the front roller 3 and measures the spinning length, is connected to a control device 60 described later. When the bobbin rail 10 reaches the rising end, the cam 55 attached to the lever shing rod 44 engages with the right side limit switch LSR, and when the bobbin rail 10 reaches the lowering end, the cam 55 moves to the left limit. It engages with the switch LSL and outputs respective detection signals to the control device 60. The cam 57 attached to the bobbin rail 10 is engaged at a substantially intermediate position in the ascending / descending range of the bobbin rail 10 corresponding to a predetermined proper position A of the roving end (set in the post-joining work in the subsequent process). A matching limit switch LSC is provided, and this limit switch LSC is turned on only when it engages with the cam 57 in the ascending direction of the bobbin rail 10, and outputs its detection signal to the control device 60.

Next, the control device 60 will be described. The control device 60 is composed of a microcomputer including a CPU and a memory, and the control program shown in the flowchart of FIG. 2 is stored in the memory. In this program, the bobbin rail 10
The 1-spin spinning length L during the descending movement from the ascending end to the descending end is measured (steps S1, 2, 3). After that, when the bobbin rail 10 reaches the proper position A while it is moving up (step S4), the actual spinning from the winding start to the present measured by the full pipe length D preset by the control device 60 and the encoder 54. The remaining spinning length R, which is the difference from the length d, is calculated (step S5), and the remaining spinning length R is the preset number of preset layers (4 layers here) and the 1-lift spinning length. It is determined whether the spinning length is less than or equal to the product of L and (R ≦ 4
L) (step S6). If it is determined that the spinning length is equal to or less than 4 layers by this determination, an appropriate spinning length Q is obtained based on the remaining spinning length R (Q = R / 4) (step S7). The divisor “4” indicates how many layers the remaining spinning amount R is wound during the ascending / descending control which is different from the normal one. After obtaining the appropriate spinning length Q in this way, the spinning length S is measured from the time when the bobbin rail 10 reaches the normal rising end and the ascending / descending direction is switched to the descending direction (step S9). When the length S becomes the proper spinning length Q (S ≧ Q) (step S
10), the bobbin rail 10 is raised and lowered by switching the raising and lowering direction before the normal lowering end (step S11),
After that, when the proper position A is reached again while the bobbin rail 10 is being raised (step S12), in the same manner as the operation of step 5, the full pipe length D and the actual spinning from the winding start measured by the encoder 54 to the present spinning are performed. The remaining spinning length R ′, which is the difference from the spinning length d, is calculated (step S13), and the remaining spinning length R ′ is calculated.
Determine the proper spinning length Q '(Q' = R '/ 2)
(Step S14).

After determining the proper spinning length Q'in this manner, the bobbin rail 10 reaches the normal rising end (step 1
5) The spinning length S is measured from the time when the ascending / descending direction is switched to descending (step S16), and this spinning length S is the proper spinning length Q '.
If (S ≧ Q ′) (step S17), the up / down direction of the bobbin rail 10 is switched from the down direction to the up position before the normal down end (step S18). Next, when the actual spinning length d becomes a value obtained by subtracting the inertial spinning amount U calculated from the full pipe length D, the control device 60 outputs a machine stop command (steps S19, S20). , 21).
For this spinning speed, for example, a spinning length of 10 seconds is measured,
It is calculated from the formula of spinning speed = spinning length for 10 seconds / 10 seconds. As for the machine standstill time when the pipe is full, the set deceleration time (deceleration time required from the maximum machine stand speed to the complete stop) in the inverter that controls the rotation speed of the main motor is set to, for example, 10 seconds, and Based on the maximum rotation command value to the inverter and the actual rotation command value to the inverter when measuring the spinning length, stop time = (actual rotation command value to inverter / maximum rotation command value to inverter) * 10 Calculate from the formula. The inertial spinning length U from the present rotation to the complete stop is calculated from the equation: inertial spinning length U = (spinning speed * stop time) / 2 (step S19).

Next, the operation of the present application will be described with reference to FIGS. During normal roving winding, the control device 60 controls the left limit switch LS of the actual spinning length d measured by the encoder 54 from the time when the detection signal is input by the right limit switch LSR (bobbin rail rising end).
The one lift spinning amount L in the descending direction of the bobbin rail 10 until the time when the detection signal is input by L (the bobbin rail descending end) is detected each time (S1 to S3). Then, after this detection, a detection signal is input by the limit switch LSC, and when the bobbin rail 10 that is rising reaches the proper position A (at this time, the roving yarn is wound from the upper side to the lower side) in advance. Set full pipe length D and encoder 54
The remaining spinning length R is calculated from the actual spinning length d from the start of winding up to the present by (S4, 5). Then, in order to determine whether or not this remaining spinning length R is less than or equal to the spinning length of the last four layers of the normal roving winding, the remaining spinning length R is the 1-lift spinning length L immediately before that. Whether or not it is four times or less is determined (R ≦ 4L), and when the remaining spinning length R is less than or equal to the spinning length of four layers by this determination, the remaining spinning length R is divided into four equal values. The proper spinning length Q (Q = R / 4) is calculated (S
6, 7). Next, after the bobbin rail 10 further moves up from the proper position A and switches the bobbin rail 10 to the down position, the spinning length S from the rising end is detected and air is supplied to the left cylinder chamber of the pneumatic cylinder 90. Leversing rod 4
4 is urged to the right (S8, 9). And
When the detected spinning length S becomes an appropriate spinning length Q, the brake device 9
1 is supplied with air to switch the ascending / descending direction of the bobbin rail 10 (S10, 11).

After that, when the bobbin rail 10 which is moving upward reaches the proper position A again, the set full pipe length D and the encoder 54
The remaining spinning amount R'is calculated from the spinning amount d from the start of winding up to the present (S12, 13). Then, based on this remaining spinning amount R ′, an appropriate spinning length Q ′ (Q ′ = R ′ /
2) is calculated (S14). Next, after the bobbin rail 10 further rises from the proper position A and reaches the rising end, the spinning length S from this rising end is detected (S15, 16). Then, when the detected spinning length S reaches the appropriate spinning amount Q ', the ascending / descending direction of the bobbin rail 10 is switched (S17, 18). After switching up and down, calculate the spinning speed from the spinning amount for 10 seconds,
The inertial spinning amount U is calculated based on the spinning speed and the stop time (S19). After that, the actual spinning amount d up to now is
When the length reaches a value obtained by subtracting the inertial spinning amount U from the set full pipe length D (point indicated by P in FIG. 5), a machine stop command is output (S20, 21). Then, since the machine frame is spun by the inertial spinning amount U before it is completely stopped, the actual spinning amount becomes the set full pipe length D at the time of the complete stop, and the roving yarn end position at this time becomes an appropriate position. .

As described above, in this embodiment, when the remaining spinning length R becomes less than the spinning length 4L for the last four layers of the normal winding, the amount of elevation of the bobbin rail 10 from the rising end is increased. Since the output length S is changed to an amount such that the appropriate spinning lengths Q and Q'are set, the roving yarn length wound on the bobbin at the time when the full pipe is stopped is the set full pipe length D, and the final roving end is It can be stopped at the proper position A. In addition, it is determined whether the remaining spinning length R is less than or equal to the spinning length 4L for the last four layers of normal winding.
Since it is performed when the bobbin rail 10 is rising and is located at the proper position A, the bobbin rail 10 of the final layer can be stopped without fail on the ascending platform (raising). Further, the control device 60 calculates the inertial spinning length U of the roving produced by the inertial operation from the output of the machine stand stop command to the complete stop of the machine stand, and outputs the machine stand stop command to the actual spinning length. Since d is output when it becomes a value obtained by subtracting the inertial spinning amount U from the set full pipe length D, the inertial spinning length U is always maintained as in the conventional case.
As a result, the spinning length becomes longer, and it is possible to prevent the waste of the residual yarn in the subsequent process from increasing.

In the present embodiment, the example in which the cone drumless type roving machine is used has been described, but the invention is not limited to this, and a mechanical bobbin forming device known in the related art is used to switch the bobbin rail up and down. Also good. Further, in the above-described embodiment, the control device 60 is configured to calculate the average spinning speed for 10 seconds immediately before the pipe is full. However, the present invention is not limited to this, and the control device 60 responds to different spinning conditions. Alternatively, a plurality of spinning speed patterns may be set in advance, and the spinning speed immediately before full filling may be obtained by referring to these spinning speed patterns. In the same manner, in the control device 60, a plurality of inertial spinning amounts U are set in advance corresponding to the spinning speeds immediately before full filling of a plurality of spinning speed patterns corresponding to different spinning conditions, A value corresponding to the actual spinning speed pattern may be selected from these values.

Next, the invention according to claim 3 will be described. In claim 3, the bobbin rail 1 in the above embodiment
An encoder that detects the rotation amount of the gear 22 that controls the elevation of 0 and detects the elevation position of the bobbin rail 10 is connected to the bobbin rail 10 that is detected by the encoder.
The up-and-down position of is transmitted to the control device 60. Then, in the control device 60, in the flow chart shown in FIG. 2 of the above embodiment, in step S19, the lifting speed of the bobbin rail 10 obtained from the lifting position data of the bobbin rail 10 transmitted from the encoder and the lifting speed of the bobbin rail 10 are used. From the stop time required to completely stop the platform, the inertial elevation amount of the bobbin rail 10 caused by the inertial operation from the output of the machine platform stop command to the machine platform complete stop is calculated,
In step S20, when the actual spinning length is just before the full pipe, and the current position of the bobbin rail 10 is
Let it be judged whether or not the inertial vertical movement amount is in front of the appropriate position, and when the inertial vertical movement amount is in front,
A stop command is output in step S21. By doing this, the roving frame receives a machine stop signal before the actual spinning amount becomes full and starts inertial rotation, and the bobbin rail 10 enters inertial ascent and descent from the position just before the proper position. When the machine stand completely stops, the stop position of the bobbin rail 10 becomes an appropriate position, and the spinning length also becomes the full pipe set value.

The invention according to claim 3 may be combined with the invention described in the above embodiment, that is, FIG.
In step 19, the controller 60 simultaneously calculates the inertial spinning length of the roving yarn and the inertial spinning amount of the bobbin rail, and the actual spinning length d subtracts the inertial spinning length from the set full pipe length D. It is also possible to output the stop command at the earlier timing, whichever of the above values or the current position of the bobbin rail is ahead of the appropriate position by the inertial spinning amount.

[0018]

As described above, in the present application, the spinning timing shorter than the set full pipe length by the inertia spinning length of the roving caused by the inertial operation from the output of the machine stop command until the machine completely stops. Since the machine stop command is output, it is possible to minimize the error between the total spinning length and the set length when the proper position of the pipe is stopped. In addition, if the inertial spinning length is calculated from the spinning speed and the stop time required to completely stop the machine base from the spinning state at that spinning speed, this inertial spinning length is more It can be obtained as an appropriate value. Also, from the ascent / descent speed of the bobbin rail and the stop time required to completely stop the machine stand from the spinning state at that lift speed, the inertia from the output of the machine stop command to the complete stop of the machine stand The inertial lift amount of the bobbin rail generated by the operation is calculated, and at the timing before reaching the full pipe length, at the timing when the bobbin rail lift position is reached by this lift amount relative to the proper position of the bobbin rail, the machine stand By outputting the stop command, it is possible to minimize the error between the stop position of the roving yarn end and the predetermined proper position when the full pipe proper position is stopped.

[Brief description of drawings]

FIG. 1 is an explanatory view of a roving frame.

FIG. 2 is a flow chart diagram.

FIG. 3 is an operation explanatory view.

FIG. 4 is an operation explanatory view.

[Explanation of symbols]

10 Bobbin rail, A stop suitable position, D full pipe length, U inertial spinning length

Claims (3)

[Claims] 1. When the spun roving length is detected and when the roving length reaches a preset full pipe length, the bobbin rail elevating / lowering switching position is changed so that the roving end becomes a predetermined proper position. In the roving machine configured to do so, at the spinning timing shorter than the full pipe length by the inertial spinning length of the roving generated by the inertial operation from the output of the machine stop command until the machine completely stops, A method for stopping a full-running of a roving frame, which is characterized by outputting a stop command. 2. The inertial spinning length is calculated from a spinning speed and a stopping time required to completely stop the machine base from a spinning state at the spinning speed. How to stop the full spinning of the roving machine. 3. When the spun roving length is detected and the roving length reaches a preset full pipe length, the lifting / lowering switching position of the bobbin rail is changed so that the roving end becomes a predetermined proper position. In the roving machine configured to do so, the bobbin rail hoisting speed and the stop time required to completely stop the machine stand from the spinning state at that hoisting speed are The bobbin rail inertial lift amount caused by inertial operation until it stops is calculated, and at a timing just before the full pipe length, the bobbin rail lift position before and after the bobbin rail proper position by this lift amount is calculated. A method to stop the full spinning of the roving frame, which is characterized by outputting a machine stop command at the timing.