JP2991249B2 - Method and apparatus for preventing shoulder stop in roving machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing shoulder stoppage in a roving machine.

[0002]

2. Description of the Related Art In general, a roving machine is provided with an abnormality detecting device (for example, a sliver breakage detecting device) for guiding the machine to stop at various parts of the machine. When such an abnormality detecting device detects an abnormality, it outputs a machine stop command to stop the machine promptly, but stops the bobbin rail near its elevation switching point (the shoulder portion of each bobbin layer). In addition, the shoulder which has been performing another normal winding due to the inertial rotation or the low-speed rotation at the time of the next startup is likely to have a shoulder collapse, and various devices have been proposed to prevent this.

In a known roving bobbin forming apparatus, one end 65a of a rack anchor bar 65 is connected to a double anchor bar bracket (not shown) attached to a bobbin rail as shown in FIG. When the other end of the bar engages with the pinion 71 and swings up and down by a predetermined angle α from horizontal, a layer change mechanism (not shown) is operated to switch the vertical direction of the bobbin rail, and the pinion 71 rotates each time the layer is switched. Rack anchor bar 65
Is gradually moved to the left, and the distance between the pinion 71 and one end 65a of the rack anchor bar 65 is reduced from K1 to K2, thereby reducing the lifting amount of the bobbin rail. The stag horn 73 (see FIG. 7) that swings by the same angle as the rack anchor bar 65 by the swing of the rack anchor bar 65 has a predetermined angle β before the swing end (corresponding to the vertical switching point). A limit dog engaged with the limit switch fixed on the machine frame side is fixed, and while both are engaged, the limit switch outputs a stop prohibition command to invalidate the machine stop command, and even if both are engaged. After the vertical switching, the machine stop command is made valid, and as a result, a stop prohibition range is provided before the shoulders 45 and 46 of the bobbin as shown in FIG. 11 (Japanese Patent Publication No. 56-41725).
issue).

[0004]

With the above configuration,
Since the limit dog is fixed so that the stop prohibition range a1 at the beginning of winding becomes an optimal stroke that does not cause shoulder stop at the start of winding, the stop prohibition range a2 near the end of winding is also determined at the position of this limit dog, The stop prohibition range a2 cannot be changed independently of the stop prohibition range a1. In this case, considering the roving length spun from when the presser enters the stop prohibition range at the start of winding and at the end of winding until the presser reaches the elevating switch point, it is found that the rise / fall stroke of the stop prohibition range is reduced. In comparison, since the effect of the increase in the bobbin winding diameter is great, the roving length near the end of winding is more than twice as large as that at the start of winding as shown by the curve P1 in FIG. Therefore, when the machine stop command is output immediately after the presser enters the stop prohibition range, if the spinning speed is constant, the machine must be close to twice the time near the end of the winding compared to the start of the winding. Does not stop.
Furthermore, in the process from the beginning of winding to full filling by an inverter, etc.
When the flyer rotation speed is gradually reduced,
The time to stop is longer. In particular, when the machine stop command is output due to roving breakage, the flying time of the broken roving near the end of winding is longer than at the start of winding as described above, so the time that adversely affects other normal weights is reduced. It is not preferable because it becomes longer.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art, and a shoulder stopping device for a roving machine capable of stopping a machine as soon as possible when an abnormality detection signal is output. Bobbin le
The stop prohibition command is output just before the
A stop prohibition range is set just before the bobbin's shoulder.
Stop in a roving machine that invalidates the machine stop command
In the prevention method, from the beginning to the end of the winding of the roving bobbin
Output timing of the stop prohibition command during spinning during
Furthermore, the end of the winding against the stop prohibition range at the beginning of the winding
Specially change the prohibition range in the vicinity
Sign.

[0006]

According to the above, the roving bobbin is wound from the beginning to the end.
During spinning during the period, the output timing of the stop prohibition command is
Change to the stop prohibition range at the beginning of the winding
To independently change the stop prohibition range in the vicinity
Thus, the time from when the stop prohibition command is issued near the winding end to when the up / down switching is performed can be made shorter and more appropriate than before, and the adverse effect on the other normal weight can be reduced even when the roving yarn breaks.

[0007]

In FIG. 1, the rotation of a main motor M is transmitted to a front roller 3, a top cone drum 4 and a flyer 5 via a rotation transmission mechanism 2 composed of a gear train, a belt transmission mechanism and the like. A cone drum belt (hereinafter, belt) 7 is wound between the top cone drum 4 and the bottom cone drum 6, and the rotation from the bottom cone drum 6 and the rotation of the main motor M are combined by a differential gear mechanism 8. To the bobbin wheel 10 which is rotatably supported by the bobbin rail 9 and rotates the bobbin wheel 10 at a high speed by the rotation of the bottom cone drum 6 with respect to the rotation of the flyer.
1 is wound around a bobbin 12.

The belt shifter 1 for moving the belt 7
A long rack 14 integral with the third rack 3 is provided so as to be able to reciprocate in the longitudinal direction. The long rack 14 meshes with a pinion 16 that is rotated forward and reverse by a rack feed motor 15, and an encoder 17 that detects the rotation of the rack feed motor 15 is connected to a shaft integrated with the pinion 16.
The rack feed motor 15 is controlled by a command from the control device 50.

A lifter rack 20 is provided on the bobbin rail 9.
A pinion 21 is meshed with the lifter rack 20, and the pinion 21 is configured to be rotated by engaging one of a pair of levering bevel gears 22 moving in the axial direction with a drive bevel gear 23. .
As shown in FIG. 2, a bobbin forming device 30 for moving the levering bevel gear 22 in the axial direction includes a control device 50 described later.
A locking body 31 integral with a levering rod 24 for reciprocating the levering bevel gear 22 is movably supported on a frame 32 by a predetermined amount in the axial direction. A pair of stoppers 33 and 34 which are engaged and disengaged from each other, and a switching device 35 for switching the locking state of the stoppers 33 and 34 and the locking body 31 are provided. When one of the levering bevel gears 22, for example, the right one and the drive bevel gear 23 are in mesh with each other, the corresponding right stopper 34 is locked with the locking pair 31,
When the engagement of the bevel gears 22 and 23 is changed, the compressed air is accumulated in the pneumatic cylinder 36 so as to urge the locking body 31 in the direction of the stopper 34 which is locked with the locking body 31, and the switching is performed by an up / down switching signal. When the operating rod 38 pushes the lower end of the right stopper 34 to release the locking of the stopper 34 and the locking body 31 by operating the cylinder 37 of the device 35, the pneumatic cylinder 3
The locking body 31 instantaneously goes to the right by the air pressure accumulated in 6, meshes with the left levering bevel gear 22 and the driving bevel gear 23, and the left stopper 33 is locked with the locking body 31.

Next, a pulse encoder 41 is attached to the front roller 3 for shoulder stop prevention control performed by the control device 50.
Are connected. The pulse encoder 41 outputs a pulse in proportion to the rotation angle of the front roller 3.
In addition, an encoder (detector) 42 for detecting the position of the bobbin rail 9 (or the amount of elevation ) is connected to the pinion 21 that meshes with the lifter rack 20. Between the front roller 3 and the flyer top, a known roving tension detecting device (Japanese Patent No. 1472674) 43 for detecting the roving position with a large number of photoelectric sensors and a machine stop command is output upon detecting roving breakage. A roving break detection switch X is provided. In addition, a switch LS1 and a switch LS2 for confirming the lifting and lowering of the bobbin rail 9, which are engaged with and disengaged from the dog 44 fixed to the levering rod 24, are provided for confirming the switching of the bobbin rail 9.

The control device 50 includes a control unit 51 using a microcomputer and a main motor control circuit 55. The control unit 51 has a constant spinning speed V from the start to the end of the winding, data required for calculating the roving bobbin winding diameter (the empty bobbin diameter d, the thickness of the roving layer (constant increment) d1, the roving yarn). From the output of the machine stop command at the spinning speed V to the machine stop after the machine stops at the angles θ of the upper and lower shoulders 45 and 46 and the spinning speed V). The input means 52 for inputting the stop time T1 and the allowance time Te is connected. The margin time Te indicates that the spinning amount was spun at the spinning speed V while the roving machine rose from the start up to the machine rotation speed at which the roving machine could pass through the elevating switch point without causing shoulder collapse.
The time is set slightly longer than the time required . Further, the control unit 51 includes a roving yarn tension signal from the roving yarn tension detecting device 43, a detection value corresponding to the bobbin rail position from the encoder 42, and a rotation detection value of the front roller 3 from the pulse encoder 41 (spinning length data). , Rise and fall confirmation switch S
1 and LS2. In addition, the control unit 51 outputs a lift switching signal to the bobbin forming apparatus 30, a rack feed signal to the rack feed motor 15, and a stop prohibition command SS to the main motor control circuit 55 in accordance with the flowchart of FIG. It is. Each step in the flowchart of FIG. 3 constitutes a function realizing means, and in particular, steps S3 to S6, S9, and S10 constitute a stop prohibition command SS output means 53 of the present invention.

Next, the motor control circuit 55 will be described with reference to FIG. In the circuit 56, a contact G1 that is closed by a stop prohibition command SS corresponding to the upper shoulder 45 output in step S5 described above and a switch LS1 (b contact) for confirming the elevation of the bobbin rail 9 are connected in series to the relay A. In the circuit 57, a contact G2 that is closed by a stop prohibition command SS corresponding to the lower shoulder 46 output in step S5 and a lowering confirmation switch LS2 (contact b) of the bobbin rail 9 are connected in series to the relay B. The circuit 58 includes a roving break detection switch X (a contact),
The b contacts A1 and B1 of the relays A and B and the relay C are connected in series. The circuit 59 is a switching circuit for the motor switching relay MS, and the circuit 60 is a motor driving circuit.

Next, the operation of the present invention will be described with reference to FIGS. In the flowchart of FIG.
In step 1, the next up / down switching point La (Lb) is set according to the up / down direction, and the following up / down switching point La = LL− (D−d) / (2 · tan θ) The up / down switching point Lb = (D−) d) / (2 · tan θ) (where the origin of the bobbin rail 9 corresponds to the uppermost end of the roving, the switching point La forms a lower shoulder 46, and the switching point Lb is an upper shoulder 45 Is calculated as shown in FIG. In step S2, the next bobbin winding diameter is calculated by D (the next bobbin winding diameter) = D (the current bobbin winding diameter) + 2 × (d1−ε). Here, ε is a correction value for a certain increment (d1) of the roving based on the tension signal from the roving tension detecting device 43, and is calculated by multiplying the deviation between a preset tension target value and the tension signal by a coefficient. Is done. The bobbin winding diameter used in step S1 is a value calculated in step S2 before switching the elevation.

In step S3, the output pulse of the encoder 42 indicating the vertical position of the bobbin rail 9 and the pulse (corresponding to the spinning amount) from the pulse encoder 41 are used to calculate the roving yarn 11 per unit length of lift (for example, 1 mm). The spinning length L is calculated. Next, in step S4, the spinning speed V
The spinning amount Lc spun between the stop time T1 and the allowance time Te corresponding to the above is calculated by Lc = V · T1 / 2 + V · Te, so that the moving amount of the bobbin rail 9 corresponding to the spinning amount Lc (Stroke of stop prohibition range) is Ld =
It is calculated by Lc / L.

Next, in step S5, step S1
Calculates and stores the output point Le of the stop prohibition command in front of the elevation changeover point La (or Lb) by the movement amount Ld from the elevation switching point La (or Lb), and the position of the bobbin rail from the encoder 42 outputs the stop prohibition command If it coincides with the point Le, the stop prohibition range (the line Q2 formed by the output point Le and the upper shoulder 4).
It is determined that an area up to 5 has been entered, as shown in FIG.
In step 6, a stop prohibition command SS is output to the motor control circuit 55. Assuming that the bobbin rail 9 is now descending as shown in FIG. 1, the contact b of the descend confirmation switch LS2 of the circuit 57 is open, the contact b of the elevation confirmation limit switch LS1 is closed, and the upper shoulder 45 (bobbin) is closed in step S6. The contact G1 is closed and the relay A is turned on by the stop prohibition command SS output shortly before the lower end of the rail 9). This makes the circuit 5
8, the relay C is not turned on even when the roving thread breakage detection switch X is closed, and the self-holding of the main motor MS is not released. It is rotated at the output speed, and the presser is positioned at the upper shoulder 45 and does not stop.

If it is determined in step S7 that the lower switching point Lb has been reached, a lowering switching signal is output to the bobbin forming apparatus 30 in step S8, whereby the levering rod 24 moves rightward as described above. The engagement between the levering bevel gear 22 and the drive bevel gear 23 is changed, and the direction in which the bobbin rail 9 is raised and lowered is turned upward. The movement of the reversing rod 24 causes the dog 44 and the lift confirmation switch LS1 to move.
Are engaged, the contact b of the circuit 56 is opened, and the relay A is turned off.
Since the b contact A1 of the circuit 58 is closed, the relay C is turned on when the roving thread breakage detection switch X is closed, the circuit is opened, and the main motor M is stopped. At the same time as the elevating direction is switched by the elevating switching signal SS, a rack feed signal is output to the rack feed motor 15, and the rack feed motor 15 moves the cone drum belt 7 to a position corresponding to the bobbin winding diameter D to be wound. .

Next, in step S9, it is determined that the output point Le has been reached after the up / down switching, and it is determined that the vehicle has gone out of the stop prohibition range. In step S10, the stop prohibition command in the upper shoulder 45 is released, and the circuit 56 contacts G1 open. Then, the process returns to step S1.

In this way, every time the lifting is switched, step S4 is performed.
From the spinning speed V, the spinning length L per unit length of the lift, the stop time T1 and the allowance time Te, the stop prohibition range for each layer is independently calculated from the stop prohibition range a1 at the start of winding, and one after another. In the vicinity of the winding end, the stop prohibition range a3 is set. Since the stop time T1 and the allowance time Te are constant from the start of winding to the end of winding, the spinning amount Lc in the step S4 is substantially constant until the end of winding (line P2 in FIG. 5), regardless of the bobbin winding diameter. If the roving yarn breakage detection signal is output immediately after entering the stop prohibition range, a certain period of time (the T1 and Te
When the time has elapsed, the roving yarn breakage detection signal is activated, so that the time during which the roving yarn scatters is reduced, and the adverse effect on the normal weight is reduced. When the spinning speed V is, for example, lower than the normal spinning speed near the end of the winding operation, the input of the constant spinning speed is stopped and the pulse encoder 41 connected to the front roller 3 is stopped. The spinning speed is calculated between steps S3 and S4 based on the number of pulses from, and stored in the control unit 51 in advance corresponding to these spinning speeds. The stop prohibition range can also be calculated using a value corresponding to the detected spinning speed. In addition, instead of the cone drum transmission in the present embodiment, for example, a variable speed motor capable of driving the speed of the bobbin wheel independently of the draft part is provided. The bobbin wheel may be driven so as to have a winding speed.

Next, another embodiment will be described with reference to FIGS. FIG. 7 shows substantially the same bobbin forming apparatus 70 as the well-known bobbin forming apparatus 70, and the pinion 71 already described with reference to FIG.
A stag horn 73 is swingably supported by the bobbin rail 9 at a predetermined angle on the support shaft 72. At a swing end of the stag horn 73, a push bolt 74 is connected to a levering bracket 75, swallow tail catches 76, 77 and The levering rod 78 is moved in the axial direction by switching the engagement. The dog 44 is fixed to the levering rod 78, and a switching confirmation switch LS4 that engages with the dog 44 at the time of vertical switching is provided. An arc groove 80 is formed at the swinging end of the stag horn 73 (corresponding to the upper and lower shoulders 45 and 46 of the roving bobbin). A rolling element 81 such as a cam follower is guided in the arc groove 80, and a limit dog 82 is attached to the rolling element 81. A sector gear 83 is engraved on the limit dog 82, and a pinion 85 rotated by a servo motor 84 fixed to the back surface of the stag horn 73 is engaged with the limit gear 82. The motor control device 86 of the servo motor 84 determines, based on the spinning length data from the pulse encoder 41 connected to the front roller 3, that the spinning length in the stop prohibition range as shown by a line P <b> 2 in FIG. As in the embodiment, the limit switch LS3 and the dog 82 arranged on the center line of the swing of the stag horn 73 are engaged with the dog 82 at substantially constant timing from the beginning to the end of the winding, and the limit switch LS3 sends the stop prohibition command SS to the main motor. The dog 82 is gradually moved to the swinging end so as to output to the control circuit 90, and the stop prohibition range is changed one after another. As described above, since the position of the dog 82 is changed at the start of winding and near the end of winding, it can be said that the stop prohibition range near the end of winding relative to the start of winding is variable. The output device 53A in this embodiment is a dog 82, a servomotor 84 for controlling the position of the dog 82, and a limit switch LS3.

FIG. 9 shows the main motor control circuit 90.
According to this, when the limit switch LS3 and the dog 82 are engaged from just before the swing end of the stag horn 73, the stop prohibition command SS is output, the a contact of the limit switch LS3 of the circuit 91 is closed, and the b contact of the circuit 92 is closed. Opens. Then, even if the abnormality detection contact X of the circuit 92 is closed, the relay C is turned on.
And the machine does not stop. When the up / down switching is performed, the limit switch LS4 is closed and the relay B is turned on.
The relay C is turned on via the contact B1, and the machine is stopped.

Referring to FIG. 10, still another embodiment will be described. In this example, a conventional bobbin forming apparatus 70A in which a dog 82 is fixed at a predetermined angle before both swing ends of the stag horn 73 is used. Output device 53 of stop prohibition command SS
A signal from the limit switch LS4 that engages with the spout length data from the pulse encoder 41 and the dog 82 is input to B. The output device 53B
Divides the spinning length of the roving bobbin up to the full stage into a plurality of stages (here, five stages), and engages the limit switch LS4 and the dog 82 corresponding to each range so that the limit switch L
A table 95 is provided in which a delay time from when the signal is output in S4 to when the stop prohibition command is output is set and stored. Further, the output device 53B compares the spinning length data with the spinning length in the table 95, reads out the delay time corresponding to the spinning length data at that time from the table 95,
The stop prohibition signal SS is output to the main motor control circuit when the delay time elapses after the input signal is input from the limit switch LS4. The delay time is, for example, the time difference between the step-shaped boundary line Q3 of the stop prohibition range shown in FIG. 6 and the conventional boundary line Q1, and at each point divided as described above, the spinning length in the stop prohibition range is constant. It is set to be. Therefore, the spinning length in the stop prohibition range in this case is a line P3 in FIG. 5, and the delay time can be set freely, so that at least the stop prohibition range a4 near the end of winding.
Is independently variable with respect to the stop prohibition range a1 at the beginning of winding.

[0022]

As described above, according to the present invention, the output timing of the stop prohibition command for preventing shoulder stoppage is being produced.
And at least at the end of the winding, it can be delayed from the conventional one, and the time from when the stop prohibition command is issued to when the up / down switching is performed can be shortened. Therefore, even when the machine stop command is output near the end of winding and immediately after the output of the stop prohibition command, the machine can be stopped in a shorter time than before, and unnecessary roving yarn is spun and fibers are scattered. Can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a roving machine embodying the present invention.

FIG. 2 is a view showing a bobbin forming apparatus.

FIG. 3 is a control flowchart of a control unit.

FIG. 4 is a main motor control circuit.

FIG. 5 is a diagram showing a spinning length in a stop prohibition range.

FIG. 6 is a diagram showing a change in a stop prohibition range.

FIG. 7 is a diagram showing another embodiment.

FIG. 8 is a diagram showing a main part of FIG. 7;

FIG. 9 is a main motor control circuit of FIG. 7;

FIG. 10 is a diagram showing still another embodiment.

FIG. 11 is an operation principle diagram of a conventional bobbin forming apparatus.

[Explanation of symbols]

9 bobbin rail, 30 bobbin forming device, 45
Upper shoulder, 46 lower shoulder, 50 control device, 53 output means, 55 main motor control circuit, M main motor, La, Lb lifting / lowering switching point, SS stop prohibition command,
X Roof break detection switch, a1 Stop prohibition range at the beginning of winding, a2, a3, a4 Stop prohibition range at the end of winding

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-49-31929 (JP, A) JP-A-55-62219 (JP, A) Jikai Sho 55-67181 (JP, U) 41725 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) D01H 1/36 D01H 1/20

Claims (5)

(57) [Claims] 1. Stop before a point at which the bobbin rail moves up and down
A prohibition command is output to stop the front of the roving bobbin short of the shoulder.
, And invalidates the machine stop command within the stop prohibition range.
In a method for preventing shoulder stoppage in a roving machine, a roving bobbin is provided.
During spinning between the beginning and end of winding, the stop prohibition finger
Command output timing to stop at the beginning of winding.
The stop prohibition range near the end of the winding
Shoulder stop in roving machine characterized by standing and changing
Prevention method. 2. Stop before the bobbin rail switching point
Output the prohibition command and check if the stop prohibition command is output
Rover that invalidates the machine stop command within the stop prohibition range
In the method for preventing shoulder stop in
The spinning length is almost constant from the beginning to the end of the winding,
Is divided into several parts from the beginning to the end of the volume.
Make sure that the roving bobbin starts winding so that it is constant at the split point.
During spinning between the end of winding and the end of the
A shoulder in a roving machine characterized by changing the imaging
Stop prevention method. 3. Stopping just before the vertical switching point of the bobbin rail
Output the prohibition command and check if the stop prohibition command is output
The machine stop command is invalid within the stop prohibition range from
In the shoulder stop prevention device of the roving machine,
Equipped with a detector that detects the vertical position of the rail
From the start of the machine stop operation at the spinning speed to the machine stop,
Can pass through the vertical switching point without shoulder collapse from motion
Calculate the amount of bobbin rail movement until the machine rotation speed is exceeded
Means to move the bobbin rail from the vertical switching point in the vertical direction.
From the detector,
Equipped with a means to output a stop prohibition command based on the detection signal
An apparatus for preventing shoulder stoppage in a roving machine. 4. A slide that swings when the bobbin rail is raised and lowered.
The dog on the tag horn is used to raise and lower the bobbin rail.
Engage with the limit switch provided on the machine frame side just before the
Output the stop prohibition command and output the stop prohibition command.
The machine stops in the stop prohibition range from the input point to the vertical switch point.
Stop on a roving machine designed to override the stop command
In the anti-ballistic device, an arc at the swing end of the stag horn
Form a groove so that the dog can move freely along the arc
And move the dog And a roving bobbin
During spinning from the beginning to the end of
The stop is prohibited by moving the
The feature is to change the output timing of the command
Shoulder stop prevention device in a roving machine. 5. A slide that swings by raising and lowering a bobbin rail.
The dog on the tag horn is used to raise and lower the bobbin rail.
Engage with the limit switch provided on the machine frame side just before the
Output the stop prohibition command and output the stop prohibition command.
The machine stops in the stop prohibition range from the input point to the vertical switch point.
Stop on a roving machine designed to override the stop command
In the jam prevention device, the roving bobbin is wound from the beginning to the end.
Is divided into multiple stages, and each stage is
The limit switch and the dog are engaged
Before the stop prohibition command is output.
A rotatable bobbin from the beginning to the end.
Length data detected by spinning length detection means during spinning
Read the delay time corresponding to
From the point when the limit switch and the dog are engaged.
When the read delay time has elapsed, a stop prohibition command is issued.
Shoulder stop in a roving machine characterized by force
Ball prevention device.