JPH07150424A - Method for preventing shoulder of formed roving package from collapsing in roving frame and apparatus therefor - Google Patents

Abstract

PURPOSE:To prevent the shoulder from collapsing after restarting a roving frame even when a presser is stopped near the shoulder part of a roving package in once stopping the roving frame during the operation thereof. CONSTITUTION:This method for preventing the shoulder of a formed roving package from collapsing comprises constituting a roving frame so as to enable the optional change in a changeover period of lifting and lowering driving in a bobbin rail lifting and lowering driving system by a command from a CPU and install a rotary encoder for sensing the position of a bobbin rail 6, directly starting the operation to stop the frame based on a frame temporary stop signal during the operation of the roving frame, then judging whether or not the stopped position of a presser is within the preset prescribed range (As) near the shoulder part of a roving package (F) after stopping the frame, when the presser is within the prescribed range (As), restarting the operation and then correcting the reversing position of the bobbin rail 6 on the side of the shoulder part corresponding to the stopped position of the presser so as to locate at a position on this side from the next usual reversing position in the moving direction of the bobbin rail 6 after passing through the prescribed range (As) by a a prescribed extent (A).

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Generally, in a roving machine, a roving yarn fed from a front roller at a constant speed is twisted on the roving yarn due to a difference in rotational speed between a flyer rotating at a constant speed and a bobbin rotating at a higher speed. Wind it on a bobbin while hanging it. The bobbin is supported by the bobbin rail and is moved up and down together with the bobbin rail, and the moving distance of the bobbin rail is shortened each time the direction of the bobbin rail raising and lowering movement changes, so that both ends of the roving bobbin have a conical shape. Is taken up.

Generally, in a roving machine, when a roving break occurs during a winding operation, the machine base is temporarily stopped based on a detection signal from a roving break detecting device. Also, the machine base is temporarily stopped when the roving is wound around the front roller of the draft device, at the end of work, or in an emergency. When the machine base is temporarily stopped due to roving break, it is necessary to stop the machine base promptly in order to prevent the roving end from being entangled with the spun roving of another weight and causing a new roving break. There is. When performing a temporary stop during the machine base operation, the winding of the roving yarn is not immediately stopped at the same time as the stop command, but the deceleration operation is performed and the roving yarn is stopped while winding the roving yarn even during deceleration. Since the presser pressing force decreases as the flyer rotation speed decreases, the roving layer wound during the deceleration operation is wound a little softer than the roving layer wound during the normal operation. Further, even when the machine is restarted after the stop, the pressure of the presser is small at first, so that the roving is softly wound.

If the stop and the restart are performed in the vicinity of the shoulder portion of the roving spool, the shoulder collapse is likely to occur due to the winding after the restart. The reason why this shoulder collapse occurs is considered as follows. First, as shown in FIG. 5 (b), when the roving thread is wound tightly on the softly wound portion (hatched portion) on the shoulder, the roving is softly wound between the hardly wound layers. The wound portion is sandwiched, and is gradually pushed out by the roving thread wound outside as shown in FIG. 5C, causing shoulder collapse. Another is that when the roving is tightly wound on the softly wound roving, the phase of the roving wound on the upper side may be shifted to the outside as compared with the normal spinning.

When the shoulder collapse occurs, it hinders the subsequent winding and the roving delivery in the subsequent process. In order to prevent the shoulder collapse, a device has been proposed in which the presser is prohibited from stopping at a position corresponding to a range of a predetermined width in the shoulder portion of the roving bobbin (for example, JP-A-49-31929).
Issue). In this device, when the presser is in the stop operation start prohibited area near the shoulder, after the stop command is output,
The stop operation is started after the presser passes through the area.
In this device, the stop operation start prohibited area is set to be constant from the start of winding to the time of full filling. Since the bobbin rail ascending / descending speed is decelerated as the roving winding diameter increases, if the stop operation start prohibition area is constant, it takes a long time for the presser to pass through the stop operation start prohibition area near the full pipe. Therefore, there is a problem that it takes a long time to stop the machine after outputting the machine stop command. Therefore, JP-A-4-2810
Japanese Unexamined Patent Publication No. 20 discloses a device in which the stop operation start prohibition region can be made smaller than the stop operation start prohibition region at the start of winding in the vicinity of the end of winding of the coarse yarn.

[0006]

If the temporary stop during the machine operation is caused by a roving break or a non-urgent cause, depending on the position of the presser when the stop command is output, the stop position of the presser may be different. It is possible to extend the time from the stop command to the start of the stop operation so that is not near the shoulder. Therefore, JP-A-49-31929,
By using the device disclosed in JP-A-4-281020, the stop position of the presser can be surely set to a position other than the vicinity of the shoulder. However, in the case of an urgent stop such as an emergency stop, it is necessary to stop as soon as possible after the stop command is output. Therefore, the operation of the roving machine equipped with the device is also disabled. .

Generally, the roving yarn breakage sensor is not provided for each weight but is composed of a light projecting device and a light receiving device which are provided at both ends of the flyer rail in the longitudinal direction. When the roving thread hanging downward from the time interrupts the light from the light projecting device, it outputs a thread break signal. Therefore, when the roving yarn is wound around the front roller and the roving yarn is broken, the roving yarn breakage sensor cannot detect the roving yarn. Therefore, the operator pushes the stop button when the roller wrapping is found. Also in this case, the operation of the shoulder collapse prevention device is invalidated. Therefore, at the time of temporary stop based on the operation of the stop button by the operator, the stop position of the presser may be near the shoulder of the roving spool. As a result, shoulder collapse occurs.

Further, when the shoulder collapse prevention device is operated, the time required for the presser to pass through the stop operation start prohibition region becomes long in the latter half of winding when the roving winding diameter is increased. Then, the so-called "flower bloom" in which the roving yarn that is sent out without being wound up on the weight of the broken roving yarn that caused the stoppage is accumulated in the flyer top portion easily occurs, and it takes time to stop the machine base. Prolonged operation and lower machine utilization rate.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to re-execute, even when the presser stops near the shoulder portion of the roving reel, when the press is temporarily stopped while the roving machine is operating. It is an object of the present invention to provide a method and a device for preventing shoulder collapse of a molded roving wound in a roving machine capable of preventing shoulder collapse after starting.

[0010]

In order to achieve the above object, according to the invention of claim 1, it is possible to arbitrarily change the switching timing of the ascending / descending drive of the bobbin rail ascending / descending drive system by a command from the control means. In a roving machine configured to have a position detecting means for detecting the position of the bobbin rail, the stop position of the presser is in a preset predetermined range near the shoulder portion of the roving when the roving machine is temporarily stopped. In this case, the inversion position of the shoulder side bobbin rail corresponding to the stop position of the presser after the restart of the operation is changed from the next inversion position after passing the predetermined range to the bobbin rail moving direction by a predetermined amount from the normal inversion position. It was corrected so that it would be in front of, and driving was performed.

According to the second aspect of the present invention, the correction amount of the bobbin rail reversal position after resuming the operation is set to a different value before and after the reversal of the bobbin rail stop position during the temporary stop. However, when the bobbin rail stops after reversing, the correction amount is set to be small.

According to the third aspect of the present invention, the position of the bobbin rail is detected in the roving frame in which the switching timing of the ascent / descent drive of the bobbin rail ascending / descending drive system can be arbitrarily changed by a command from the control means. Position detection means, input means for inputting spinning conditions, and whether or not the position of the presser at the time of temporary stop during roving winding operation is within a preset predetermined range near the shoulder of the roving winding And a data regarding a correction amount for setting an inversion position of the shoulder side bobbin rail corresponding to the stop position of the presser after the operation is restarted when the position of the presser is within the predetermined range. And a spinning position and a reversal position of the bobbin rail on the shoulder side corresponding to the stop position of the presser after the restart of the operation based on the spinning condition and the data stored in the storage unit. Calculating means for calculating or selecting a correction amount, the inverted position of the bobbin rail and a control means for controlling the switching elevation of the bobbin rail lifting drive system to a predetermined reversing position.

[0013]

In the present invention, the position of the bobbin rail is detected by the position detecting means. When the operation of the roving frame is temporarily stopped, it is determined whether or not the position of the presser in the stopped state is within a predetermined range set near the shoulder of the roving spool. When the position of the presser is within the predetermined range, after the operation is restarted, the reversal position of the shoulder side bobbin rail corresponding to the stop position of the presser is the normal reversal position from the next reversal position after passing the predetermined range. Is also corrected by a predetermined amount so that it is in front of the moving direction of the bobbin rail. Therefore, when the operation of the roving frame is temporarily stopped, when the softly wound roving layer is present near the shoulder, the inversion position of the bobbin rail after that is on the softly wound roving layer near the shoulder. It is a position where the roving is not wound. As a result, the collapse of the molded roving winding is prevented.

According to the second aspect of the present invention, the correction amount of the bobbin rail reversal position after the operation is restarted is set to different values before and after the reversal of the bobbin rail stop position during the temporary stop. To be done. Then, when the bobbin rail is stopped after being reversed, the correction amount is set to be small.
Therefore, after the operation is resumed, the bobbin rail ascending / descending range becomes wider than in the case where the bobbin rail stops before the reversal.

According to the third aspect of the invention, the spinning conditions are input by the input means. Data relating to the correction amount for setting the reversal position of the bobbin rail after the restart of the operation is stored in the storage means in association with the spinning conditions. The determining means determines whether or not the position of the presser at the time of a temporary stop during the roving winding operation is within a predetermined range near the shoulder of the roving winding. Then, when the position of the presser is within the predetermined range, the correction amount for setting the inversion position of the bobbin rail on the shoulder side corresponding to the stop position of the presser after restarting the operation is the spinning condition and the The calculation means calculates or selects the data based on the data stored in the storage means. The control means controls up / down switching of the bobbin rail up / down drive system so that the inversion position of the bobbin rail after the restart of the operation becomes a predetermined inversion position.

[0016]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIGS. The drive system of the roving frame is basically the one proposed by the applicant of the present application (Japanese Patent Laid-Open No. 5-2146).
19). As shown in FIG. 2, the front roller 1 is rotated via a gear train (none of which is shown) arranged between one end of the rotary shaft 1a and a driving shaft which is rotationally driven by the main motor M. It is designed to be driven. Above the flyer 2 is a driven gear 3
Is integrally rotatably fitted and fixed, and the rotation of the driving shaft is transmitted by the rotation of the driving shaft via a belt transmission mechanism, and is rotationally driven via a drive gear 5 fitted to the rotating shaft 4. . On the other hand, a driven gear 7a is fixed to a bobbin wheel 7 mounted on the bobbin rail 6. On the rotary shaft 9 to which the drive gear 8 meshing with the driven gear 7a is fitted and fixed, the rotational force of the driving shaft and the winding motor 1 which is driven at a variable speed via the inverter 10b.
The rotational force of 1 is combined and transmitted by the differential gear mechanism 12. The winding motor 11, the differential gear mechanism 12, and the like constitute a winding speed transmission that reduces the bobbin rotation speed in response to an increase in the roving winding layer.

A lifter rack 13 is fixed to the bobbin rail 6. Gear 1 meshing with lifter rack 13
The rotation of the drive shaft 17, which is driven by the lifting motor 16 that is variable-speed driven via the inverter 10c, is transmitted to the rotary shaft 15 to which 4 is fitted via the switching mechanism 18 and the gear train. The switching mechanism 18 includes an intermediate shaft 19, and a pair of gear trains 20 and 21 provided between the intermediate shaft 19 and the drive shaft 17.
And electromagnetic clutches 22 and 23 for transmitting the rotation of the gear trains 20 and 21 to the intermediate shaft 19. And
The direction of rotation of the rotary shaft 15, that is, the direction of vertical movement of the bobbin rail 6 is changed by exciting and demagnetizing the electromagnetic clutches 22 and 23. A rotary encoder 24 is connected to one end of the rotary shaft 15 as position detecting means for detecting the position of the bobbin rail 6 in the vertical direction. The rotary encoder 24 also serves as a sensor that detects the ascending / descending speed of the bobbin rail 6. The lifter rack 13, the gear 14, the rotary shaft 15, the lifting motor 16, the drive shaft 17, and the switching mechanism 18 constitute a bobbin rail lifting drive system.

A known roving breakage detection sensor PH is provided near the upper part of the flyer rail (not shown).
The roving machine is also equipped with an emergency stop switch ES and a stop switch S. The stop switch S is operated by the operator when the roving is wound around the front roller or when the work is finished.

Next, a control circuit for driving and controlling the drive system will be described with reference to FIG. A microcomputer 26 that constitutes the control device 25 includes a CPU (central processing unit) 27 as a determination unit, a calculation unit, and a control unit, and a program memory as a storage unit including a read-only memory (ROM) that stores control programs and the like. And 28. Further, the microcomputer 26 receives the input data and the CP input by the input device 29 as the input means.
Work memory 3 comprising a readable and rewritable memory (RAM) for temporarily storing the results of arithmetic processing in U27
It has 0. The input device 29 is integrally incorporated in the control device 25 as a keyboard, and includes spun roving weight, fiber type, flyer rotation speed, twist number, bobbin diameter, roving winding shoulder angle, bobbin diameter at the start of winding, etc. The spinning conditions of are input to the work memory 30.

The program memory 28 stores data relating to a predetermined range of the position of the presser when the machine base is temporarily stopped, which serves as a criterion for determining whether or not shoulder collapse is likely to occur after the machine base is restarted. Further, the program memory 28 stores data regarding the correction amount for setting the inversion position of the bobbin rail on the shoulder side corresponding to the stop position of the presser after the operation is restarted when the presser stops within the predetermined range. ing. The data are spun roving weight, fiber type,
It is stored as a database corresponding to spinning conditions such as flyer rotation speed. The fiber type means a difference between card-treated cotton, combed-cotton cotton, synthetic fiber and the like. This database is created based on operating condition data and experimentally obtained data that have been accumulated as materials.

The CPU 27 operates based on the program data stored in the program memory 28. The output signal from the rotary encoder 24 is the input interface 3
It is adapted to be input to the CPU 27 via 1.
The rotary encoder 24 outputs different pulse signals corresponding to the normal rotation and the reverse rotation of the rotary shaft 15, and the rise and fall of the bobbin rail 6 can be confirmed from the pulse signal. There is. The CPU 27 is adapted to calculate the ascending / descending speed and position of the bobbin rail 6 based on the output signal from the rotary encoder 24.

The CPU 27 determines whether or not the position of the presser 2a is within a predetermined range near the shoulder of the roving thread when the roving thread winding operation is temporarily stopped. CPU27
When the position of the presser 2a is within a predetermined range, the shoulder side bobbin rail 6 corresponding to the stop position of the presser 2a after the restart of the operation is determined based on the spinning condition and the data stored in the program memory 28. Select the correction amount for setting the reverse position.

The CPU 27 includes an output interface 32, motor drive circuits 33a, 33b and 33c and an inverter 1.
The main motor M, the winding motor 11, and the lifting motor 16 are drive-controlled via 0a, 10b, and 10c. Further, the electromagnetic clutches 22 and 23 are controlled in their excitation / demagnetization based on a signal from the CPU 27 via the electromagnetic clutch excitation / demagnetization circuit 34, and the bobbin rail 6 is switched up / down (reversed) by switching the excitation / demagnetization of the electromagnetic clutches 22 and 23. Is to be done. The bobbin rail 6 is moved up when one electromagnetic clutch 22 is excited, and is moved down when the other electromagnetic clutch 23 is excited. Further, both electromagnetic clutches 22 and 23 are never excited at the same time.

Next, the operation of the device configured as described above will be described. Prior to the operation of the machine stand, the spinning conditions such as the spun roving weight, the fiber type, the flyer rotation number, the twist number, and the spinning number are input by the input device 29.

After that, the operation of the machine base is started, and the front roller 1 and the flyer 2 are rotationally driven by the main motor M, respectively. An output signal from the rotary encoder 24 is input to the CPU 27 as the machine base is driven. At the same time when the machine base is started, the winding motor 11 and the lifting motor 1
6 is also driven, the rotational force of the main motor M input to the differential gear mechanism 12 and the rotational force of the winding motor 11 are combined by the differential gear mechanism 12, and the combined rotational force causes the rotation shaft 9 to rotate.
Is driven to rotate the bobbin wheel 7. As a result, the roving R spun from the front roller 1 is twisted by the flyer 2 and wound on the bobbin B rotating at a higher speed than the flyer 2 in layers. Further, the bobbin rail 6 is moved up and down together with the lifter rack 13 via the switching mechanism 18, the rotating shaft 15 and the like by driving the lifting motor 16.

The winding speed and the ascending / descending speed of the bobbin rail 6 are gradually reduced as the roving layer increases by changing the rotation speeds of the winding motor 11 and the ascending / descending motor 16.
The CPU 27 always calculates the position of the bobbin rail 6 based on the output signal from the rotary encoder 24. As shown in FIG. 1, the position of the bobbin rail 6 is a position coordinate value set to increase in the upward direction of the bobbin rail 6 with the lower end of the position where the bobbin B can be wound as the origin (0). Indicated as.

The first lower reversal position X ₁ and the first upper reversal position X ₂ are determined by the lift length L and the margin Lm. Hereinafter, the reversal position of each layer is set such that the upper shoulder and the lower shoulder are located in front of the previous position in the moving direction of the bobbin rail 6 by a certain amount α. Then, every time the bobbin rail 6 reaches the up / down switching position for realizing the shoulder angle of the roving wound set by the spinning condition, a switching signal is output from the CPU 27 to the switching mechanism 18, and the bobbin rail 6 is reversed. Be seen.

During the machine operation, the controller 25 is provided with a roving breakage detection sensor PH, a stop switch S or an emergency stop switch ES.
When an ON signal (a machine stop signal) is input from
The CPU 27 starts the machine base stop operation based on the signal, and the machine base is stopped. Bobbin rail 6
Regardless of the position, the CPU 27 starts immediately when the CPU 27 inputs an ON signal from the stop switch S or the like. Therefore, the bobbin rail 6 may stop at a position where the presser 2a is near the shoulder of the roving spool F.

When the machine stand stops, the CPU 27 confirms the stop position of the bobbin rail 6 from the calculation result based on the output signal of the rotary encoder 24. Next, the stop position of the bobbin rail 6 is set by the CPU 27, and the presser 2a moves by the roving winding F.
It is determined whether or not it is in a position corresponding to within the predetermined range As near the shoulder of the. When the position of the presser 2a is within the predetermined range As, the CPU 27 controls the presser 2 after restarting the operation.
The inversion position of the bobbin rail 6 on the shoulder side corresponding to the stop position of a is a predetermined amount more than the normal inversion position.
A correction amount A, which is in front of the moving direction of, is set.

The correction amount A is selected from the database stored in the program memory 28 corresponding to the spinning conditions. The predetermined range As is, for example, the raw material is cotton and the roving weight is 25.
Flying speed of flyer 2 is 1 with 0 pellen / 30 yards of roving
In the case of 000 rpm, the range is 30 mm. In addition, the value of the correction amount A has a width of 3 mm under the same spinning conditions.

Then, after the cause of stopping the machine is eliminated,
When the restart signal is input, the CPU 27 restarts the machine base. After the restart, the bobbin rail 6 is moved to the reversal position on the side opposite to the shoulder of the stop position, as usual, regardless of the position at the time of the temporary stop. For example, when the machine stand is stopped with the presser 2a present at the position P within the predetermined range As of the fourth layer on the upper shoulder, the machine stand was stopped before reversing. 6 is first lowered so that the presser 2a relatively moves toward the upper end of the predetermined range As. When the bobbin rail 6 is lowered to the normal reverse position and the presser 2a reaches the position X ₄ , the CP is reached.
A switching signal is output from U27 to the switching mechanism 18, the excitation / demagnetization of the electromagnetic clutches 22 and 23 is switched, and the bobbin rail 6 is inverted. Then, when the bobbin rail 6 moves up to the normal reversal position where the presser 2a corresponds to the position X ₅ , the bobbin rail 6 is reversed again. When the machine stand is reversed, that is, when the presser 2a is present within the predetermined range As of the fifth layer on the upper shoulder, the bobbin rail 6 is raised at the same time as the restart.

Then, the lower shoulder is reversed, the bobbin rail 6 continues to descend, and the bobbin rail 6 is offset by a correction amount A from the shoulder side normal reversal position X ₆ corresponding to the stop position of the presser 2a.
Position X _'6 only the moving direction of the front of the bobbin rail 6
When reaching, the switching signal is output from the CPU 27 to the switching mechanism 18, and the bobbin rail 6 is inverted. Thereafter, similarly, the bobbin rail 6 is inverted at the normal shoulder position on the lower shoulder side of the roving bobbin by a predetermined amount α from the front shoulder position. On the upper shoulder side, the bobbin rail 6 is turned upside down in the moving direction by the correction amount A as compared with the normal turning-up position. Thereafter, on the upper mold side, the positions are inverted at the corrected positions X ′ ₈ and X ′ ₁₀ . Therefore, the roving is not wound tightly on the roving layer softly wound around the shoulder portion, and the collapse of the formed roving is prevented.

On the other hand, when the position of the presser 2a is outside the predetermined range As when the machine base is temporarily stopped, the CPU 27 does not select the correction amount A, and when the restart signal is input, the normal operation is resumed after the operation is restarted. The switching mechanism 18 is controlled so that the bobbin rail 6 is reversed at the reverse position.

After restarting, if a temporary stop is performed until the pipe is full, the same operation is repeated again. When the bobbin rail 6 stops at a position where the presser 2a corresponds to the predetermined range As, the bobbin rail 6 elevating range after restarting becomes narrower than usual. However, since the roving winding amount up to the full pipe is set by the length of the roving yarn spun from the front roller 1, the roving winding amount up to the full pipe remains the same even when the elevation range of the bobbin rail 6 changes. .

As described above, as soon as the machine standstill signal is input to the CPU 27, the machine stand stop operation is started to stop the machine stand. Therefore, the machine stand moves on the bobbin rail 6 when the stop signal is output. It will be stopped in the shortest time regardless of the position.
Therefore, in order to prevent the presser 2a from stopping near the shoulder portion of the roving bobbin F, unlike the case where the stop operation start prohibition region is provided, the bobbin B is stopped by the roving thread cutting weight that is the cause of the stop when the roving thread cutting is stopped. The so-called "flower bloom" in which the roving R that is not wound up on the fly is accumulated in the flyer top is prevented. as a result,
The time from stopping the roving break to restarting the machine is shortened,
The operating efficiency of the roving machine is improved.

When the presser 2a is stopped near the shoulder of the roving spool, the roving is firmly wound on the roving layer which is softly wound near the shoulder at the reverse position of the bobbin rail 6 after restarting. There is no position. Therefore, the operator can press the stop switch S without worrying about the position of the presser 2a even when the machine switch is stopped by pressing the stop switch S at times other than the emergency stop.

(Second Embodiment) Next, a second embodiment will be described with reference to FIG. This embodiment is different from the above-mentioned embodiment in that a known molding apparatus is used as a means for switching the ascending / descending direction of the bobbin rail 6 at an arbitrary time, and the other configurations are the same. That is, there is provided a means capable of switching the engagement state between the levering bracket and the pair of pigeon catches forming the molding device at any time.

As shown in FIG. 6, the molding device 40 includes a shaft 41.
And a tension spring 42
One end of a reversing rod (not shown) is connected to the reversing bracket 43 biased by. The vertical movement of the raising / lowering drive system of the bobbin rail 6 is switched by the horizontal movement of the leversing rod in accordance with the swing of the leversing bracket 43.

A pinion 44 which is rotated integrally with a gear mechanism (not shown) is attached to the shaft 41, and a cut rack anchor bar 46 having one end connected to a double anchor bar 45 which moves up and down together with the bobbin rail 6 is provided at the other end. It is arranged so as to mesh with the pinion 44. Axis 4
Bolts 48a and 48b are fixed to a bracket 47 that is swingably supported with respect to the first unit 1 and that engages with the cut rack anchor bar 46. When the bobbin rail 6 reaches the normal reversal position due to the swing of the bracket 47, one of the bolts 48a and 48b alternately engages the pigeon catches 49a and 49b, and the leversing bracket 43 and the pigeon catch 49a ,. 49
The engaging state with b is switched and the levering bracket 43 is swung.

Air cylinders 50a and 50b are provided above the pigeon catches 49a and 49b. Piston rods 51a, 5 of the air cylinders 50a, 50b
1b is a pigeon catch 49a, 49b in the protruding state.
The lever catch bracket 43 to a position where it cannot be engaged with the lever shingling bracket 43.
It is arranged at a standby position where it cannot engage with a and 49b. The air cylinders 50a and 50b are electromagnetic control valves (not shown) that are operated by command signals from the CPU 27.
Driven through.

In the apparatus of this embodiment, during normal spinning, the air cylinders 50a and 50b are connected to the piston rods 51a and 5b.
1b is kept in the immersed state. Then, the bolts 48a,
By alternately engaging the pigeon catches 49a and 49b with 48b, the engagement state between the levering bracket 43 and the pigeon catches 49a and 49b is switched, and the bobbin rail 6 is inverted. On the other hand, when the bobbin rail 6 is reversed after the machine base is temporarily stopped and after the machine is restarted before the normal reversing position in the moving direction of the bobbin rail 6, it is necessary to respond every time the bobbin rail 6 reaches a predetermined position. The air cylinders 50a and 50b are operated to switch the engagement state between the levering bracket 43 and the pigeon catches 49a and 49b.

The present invention is not limited to the above-described embodiments, and for example, whether or not the stop position of the bobbin rail 6 requires correction of the reverse position of the bobbin rail 6 after restarting the machine base. The value of the predetermined range As and the value of the correction amount A for determining may be set to different values depending on the stop position of the bobbin rail 6. That is, the stop position of the bobbin rail 6 has different values before and after the reversal. in this case,
The value of the predetermined range As when the bobbin rail 6 moves in the direction away from the reverse position is set to be smaller than the value of the predetermined range As when the bobbin rail 6 moves toward the reverse position. Further, the correction amount A in the case of stopping after the reversal is set to be smaller than that in the case of stopping before the reversal. In this case, when the bobbin rail 6 is stopped after reversing, the ascending / descending range of the bobbin rail 6 after restarting the operation is wider than when it is stopped before reversing.

The value of the predetermined range As may be different between the first half and the latter half of the roving winding. Further, instead of keeping the shoulder angle constant from the start of winding to the full pipe, the present invention may be applied to the case where the elevation range of the bobbin rail 6 is changed so that the shoulder angle becomes smaller in the first half and the latter half of the roving winding. .

Further, the correction amount A is previously stored in the program memory 28.
Instead of storing the database for selecting, the approximate expression for calculating the correction amount A from the spinning condition may be stored in the program memory 28, and the correction amount A may be calculated from the expression. . The approximate expression is obtained, for example, by graphing a database. Further, instead of storing the database or the approximate expression in the program memory 28, it may be stored in a nonvolatile readable and rewritable memory or a rewritable programmable ROM (EPROM). Further, instead of storing a plurality of correction amounts A corresponding to a plurality of spinning conditions in advance in the program memory 28 or the like, when inputting the spinning conditions with the input device 29, the correction corresponding to the spinning conditions is performed. The amount A may be input.

Further, instead of the configuration in which the correction amount A is input in advance before operating the machine base, if the position of the presser 2a is within the predetermined range As when the machine base is temporarily stopped, a warning lamp, a buzzer, etc. The warning device may be operated to give a warning that there is a risk of shoulder collapse, and then the operator may input the correction amount A.

Further, instead of the structure in which the stop operation is started immediately when the stop signal is input to the CPU 27 during all the temporary stop of the machine base, the presser 2a is activated when the ON signal of the yarn breakage detection sensor PH is input. The stop operation may be started after passing a predetermined range near the shoulder, and the stop operation may be started immediately only when an emergency stop signal or a signal of a stop switch operated by an operator is input to the CPU 27.

Further, instead of using the pair of electromagnetic clutches 22 and 23 as the switching mechanism 18 for controlling the lifting / lowering switching of the bobbin rail 6 in the first embodiment, the lifting / lowering motor 1 is used.
6 uses a variable speed motor that can rotate forward and backward
May be driven to rotate forward and backward. Further, in the second embodiment, instead of the air cylinders 50a and 50b as means for switching the engagement state of the pigeon catches 49a and 49b, a motor is provided between a position that can engage with the pigeon catches 49a and 49b and a position that cannot engage with them. You may respectively provide the lever rotated. Further, as a drive system of the roving frame, as in the device disclosed in Japanese Patent Laid-Open No. 2-242925, a configuration is adopted in which the rotation speed of the bobbin wheel 7 and the ascending / descending speed of the bobbin rail 6 are changed by using a cone drum. You may.

Further, as a position detecting means of the bobbin rail 6, a so-called magnet scale in which a large number of permanent magnets of which N poles and S poles are alternately arranged is disposed in the vicinity of the ascending / descending range of the bobbin rail 6. The detector may be fixed to the bobbin rail 6 so as to be movable integrally, and the detection signal of the detector may be input to the control device 25 to detect the position of the bobbin rail 6. In this case, the lifter rack 13
An error due to the influence of backlash that occurs when position detection is performed via the gear 14 that meshes with is eliminated.

[0049]

As described in detail above, according to the present invention, it is possible to prevent shoulder collapse due to winding after restarting due to a temporary stop in the vicinity of the shoulder portion of the roving bobbin, and in the subsequent winding and subsequent steps. It is possible to prevent problems during the feeding of the roving. Also, regardless of the position of the presser, the stop operation can be started immediately after the stop command to stop the operation of the machine base in a short time, and the time until the restart can be shortened, so that the operating efficiency of the roving frame is improved. .

According to the second aspect of the present invention, when the bobbin rail is stopped after reversing, the bobbin rail ascending / descending range after the operation is restarted is wider than when it is stopped before reversing.

[Brief description of drawings]

FIG. 1 is a schematic diagram illustrating an inversion position of a bobbin rail according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram of a drive system of a roving frame.

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

FIG. 4 is a flowchart showing the operation of the CPU from when the machine is stopped until it is restarted.

FIG. 5: After the presser is stopped near the shoulder of the roving spool,
It is a schematic diagram which shows the case where a roving collapse occurs by roving winding after a restart.

FIG. 6 is a partially cutaway schematic front view of the lifting / lowering switching mechanism of the second embodiment.

[Explanation of symbols]

2a ... Presser, 6 ... Bobbin rail, 13 ... Lifter rack constituting bobbin rail lifting means, 16 ... Similarly lifting motor, 18 ... Similarly switching mechanism, 24 ... Rotary encoder as position detecting means, 25 ... Control device, 27
... CPU as judging means, computing means and control means, 2
8 ... Program memory as storage means, As ... predetermined range, A ... correction amount.

Claims (3)

[Claims] 1. A rough spinning machine comprising a position detecting means for detecting the position of the bobbin rail, the change timing of the ascending / descending drive of the bobbin rail lifting drive system being arbitrarily changeable by a command from the control means. , When the stop position of the presser is within a predetermined range near the shoulder of the roving during a temporary stop during the operation of the roving frame,
The inversion position of the bobbin rail on the shoulder side corresponding to the stop position of the presser after the restart of the operation is moved from the next inversion position after passing the predetermined range by a predetermined amount before the normal inversion position in the bobbin rail moving direction. A method for preventing shoulder collapse of a molded roving wound in a roving machine that is corrected to operate as follows. 2. The bobbin rail stop position after the reversal is set by setting the correction amount of the bobbin rail reversal position after the resumption of operation at different values before and after the bobbin rail stop position during the temporary stop. In this case, the correction amount is set to be small, and the method for preventing shoulder collapse of the formed roving wound in the roving machine according to claim 1. 3. A position detecting means for detecting the position of the bobbin rail and a spinning condition in a roving machine capable of arbitrarily changing the switching timing of the ascending / descending drive of the bobbin rail ascending / descending drive system by a command from the control means. Input means for inputting, judging means for judging whether or not the position of the presser at the time of temporary stop during the roving winding operation is within a predetermined range near the shoulder portion of the roving winding, and the position of the presser Is within the predetermined range, storage means for storing data relating to the correction amount for setting the inversion position of the bobbin rail on the shoulder side corresponding to the stop position of the presser after restarting operation, spinning conditions and Based on the data stored in the storage means, a correction amount for setting the reversal position of the shoulder side bobbin rail corresponding to the stop position of the presser after restarting the operation is calculated or selected. Calculating means and the inverted position is predetermined reversing position and becomes shaped coarse yarn shoulder collapse prevention device in Rover and control means for controlling the switching elevation of the bobbin rail lifting drive system as the bobbin rail.