JP2002129434A - Method and system for detecting abnormality of bobbin exchanger in single spindle-driving type spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and system for detecting the presence/absence of a bobbin grip abnormality at each of the grippers in a bobbin exchanger and for identifying spindle(s) where such an abnormality occurs in a simple scheme through making the best use of the characteristic of a single spindle-driving type spinning machine. SOLUTION: This system works as follows: in putting a bobbin exchanger at operation, when, in such a condition that an empty bobbin is inserted into a spindle by each of grippers, a torque less than the normal gripping force for each of the grippers is made to act on each of the spindles through the corresponding spindle motor, if one or more of the spindles is (are) rotated, the gripper(s) of the spindle(s) in question is (are) judged as an abnormal grip; next, when, in such a condition that each of the grippers is put to a grip-released mode, a torque less than the normal gripping force for each of the grippers is made to act again on each of the spindles through the corresponding spindle motor, if one or more of the spindles is (are) not rotated, the gripper(s) of the spindle(s) in question is (are) judged as an abnormal grip-release, and the display(s) for the spindles judged to be abnormal is (are) driven.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of detecting an abnormality in a pipe changer of a single-spindle type spinning machine equipped with a large number of weights and independently driving a spindle of each weight by a motor provided for each weight. It concerns the device.

[0002]

2. Description of the Related Art In recent years, automation in a spinning factory has been advanced,
In spinning machines such as a ring spinning machine and a ring twisting machine, doffing work for filling a full bobbin and inserting a new empty bobbin into a spindle are automatically performed by a tube changing device (bobbin changing device). ing. In the all spindle simultaneous type pipe changer equipped for each spinning machine stand, the pipe change operation is performed as shown in FIG.
As shown in (a), the bobbin gripping device 61a mounted on the doffing bar 61 moves along the line indicated by the arrow, and removes the empty bobbin E pulled out from the peg 62a of the transfer device 62 to the middle peg. After being inserted into the
It reaches a position corresponding to above the full bobbin F above. Next, the bobbin gripping device 61a moves along the line indicated by the arrow in FIG. 8B, pulls out the full bobbin F on the spindle 64, and then inserts the bobbin F onto the peg 62a of the transport device 62. Next, the robot again moves along the line indicated by the arrow in FIG. 8A, inserts the empty bobbin E on the intermediate PEG 63 into the spindle 64, and then moves along the line indicated by the arrow in FIG. It returns to the standby position above the tag 62a.

[0003] If the operation of the refilling device is continued in a state in which the removal of the full bobbin F from the spindle 64 has been mistakenly performed during the refilling operation, the empty bobbin E and the full bobbin F are inserted when the empty bobbin E is inserted into the spindle 64. And the full bobbin F is damaged, or the bobbin gripping device 61a is damaged. Further, when the operation of the spinning machine stand is restarted in a state where the insertion error to the spindle 64 has occurred, the yarn may be directly wound on the spindle 64 on which the empty bobbin E is not mounted.

[0004] In order to eliminate such inconveniences, conventionally, there has been proposed a device for detecting the occurrence of an abnormality at the time of a refilling operation of a refilling device and for preventing an excessive force from acting on a bobbin gripping device. It has also been implemented. For example, when an excessive force acts on the bobbin gripping section, a bobbin gripping device is used that prevents the bobbin gripping section from detaching from a regular position and applying an excessive load to the bobbin and the bobbin gripping section. I have.

[0005] If an abnormality occurs during the refilling operation of the refilling device, it is necessary for the operator to eliminate or repair the abnormality to continue the renewal work and restart the spinning machine stand. for that reason,
It is necessary to identify the occurrence of a pipe replacement abnormality or the weight at which the pipe replacement abnormality has occurred, and notify the worker of the weight. Conventionally, there is a device that detects a top of a bobbin inserted into a spindle by detecting a top portion of a bobbin inserted into a spindle by providing a light-emitting portion at one end of a spinning machine stand and a light-receiving portion at the other end. It is used. Although this device cannot identify the weight at which the pipe replacement abnormality has occurred, the operator can easily confirm the full bobbin based on the detection of the abnormality. Further, Japanese Patent Application Laid-Open Nos. 64-52827 and 4-263630 disclose devices capable of specifying a weight in which a pipe replacement abnormality has occurred.

In the apparatus described in Japanese Patent Application Laid-Open No. 64-52827, the gripper (bobbin gripping device) is held by a pair of upper and lower holding elements. Detach from the holding element. Therefore, no excessive load acts on the spindle or the gripper. Also disclosed is a configuration for generating a signal for specifying a location where the gripper has detached.

In the device described in Japanese Patent Application Laid-Open No. 4-263630, a sensing member for detecting whether or not an empty bobbin or a full bobbin exists is provided in the grip mechanism, and an empty space in the grip mechanism is provided by the operation of the sensing member. When a bobbin or a full bobbin should be present, whether or not there is an empty bobbin or a full bobbin is detected, and a non-existent portion is specified.

In recent years, in order to increase the number of spindles in the spinning frame or to increase the rotation speed of the spindle, instead of driving all the spindles of the spinning frame with one motor, a spindle drive is performed for each spindle. Single-spindle drive type spinning machine provided with a motor for use has been proposed.

[0009]

SUMMARY OF THE INVENTION The aforementioned Japanese Patent Laid-Open No. 64-52
In the apparatus disclosed in Japanese Patent Application Laid-Open No. 827 and Japanese Patent Application Laid-Open No. 4-263630, it is possible to detect a bobbin holding error or an insertion error into a spindle, and also specify the location of the error. However, in these devices, it is necessary to newly provide a device for detecting the gripping error and specifying the location of the error in the pipe replacement device, which complicates the configuration of the bobbin gripping device and increases the manufacturing cost. Problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a first object of the present invention is to make use of the characteristics of a single-spindle drive type spinning machine and to realize a simple configuration of each holding device of a pipe replacement device. An object of the present invention is to provide a method and an apparatus for detecting an abnormality of a tube changing device of a single-spindle-driven spinning machine capable of detecting the presence or absence of a gripping abnormality of a bobbin or an empty bobbin and specifying the weight at which the gripping abnormality occurs. It is a second object of the present invention to provide an abnormality detecting device for a tube changing device of a single-spindle-driven spinning machine in which an operator can easily confirm a weight at which a gripping abnormality has occurred, in addition to the first object.

[0011]

In order to achieve the first object, according to the first aspect of the present invention, a plurality of weights are provided and a spindle of each weight is provided by a motor provided for each weight. In the single-spindle drive type spinning machine which is independently driven and provided with a refilling device, a bobbin inserted into the spindle so as to be integrally rotatable is gripped by each gripping device of the refilling device when the bobbin is removed from the spindle. In this state, a rotational force weaker than the normal gripping force of each gripping device is applied to each spindle by each of the motors, and it is determined whether or not each gripping device has a gripping abnormality based on whether the spindle rotates.
The gripping device corresponding to the weight on which the spindle rotates is determined to be a gripping abnormality.

According to the present invention, in a state where each gripping device of the tube replacement device grips a full bobbin or an empty bobbin inserted so as to be integrally rotatable with the spindle, the rotation of each spindle is weaker than the normal gripping force of each gripping device. Force is applied from the motor of each weight. If there is no abnormality in each gripping device, the rotation of the spindle is prevented via the bobbin inserted into the spindle. If there is a gripping abnormality (grip error), the spindle is rotated, and the gripping device corresponding to the spindle on which the spindle rotates is determined to be a gripping abnormality. Therefore, without adding a new mechanism to the tube replacement device, it is possible to specify the presence / absence of an abnormality in the tube replacement device and the location of the abnormality by simply changing the spindle driving side of each weight and the control program of the tube replacement device. Become.

According to a second aspect of the present invention, in the first aspect of the present invention, the determination of the presence or absence of the gripping abnormality is performed in a state where the tube replacement device inserts an empty bobbin into a spindle. An operator can easily find a mishandle of a full bobbin by looking at the machine after removing the full bobbin.However, it is difficult to find a mistake in inserting an empty bobbin into the spindle. As a result, the yarn may be wound directly on the spindle. However, according to the present invention, such an inconvenience can be avoided by detecting the position of the insertion error of the empty bobbin.

According to a third aspect of the present invention, in the second aspect of the present invention, when the bobbin is mounted on the spindle, when the bobbin gripping state of each gripping device is released, each of the spindles is normally operated by the respective motor by the motor. By applying a rotation force weaker than the proper gripping force, the gripping device corresponding to the weight on which the spindle does not rotate is determined to be a gripping release abnormality.

According to the present invention, a bobbin grip release error is detected in the bobbin grip release state of each grip device. Therefore, it is possible to prevent the empty bobbin inserted into the spindle from being pulled out of the spindle together with the movement of the gripping device while being held by the gripping device, and to avoid leaving the spindle empty.

In order to achieve the second object, in the invention according to claim 4, a large number of weights are provided, and the spindles of each weight are independently driven by motors provided for each weight, and the pipe replacement is performed. In a single-spindle drive spinning machine equipped with a device, an insertion bobbin gripping state confirming means for confirming that each gripping device of the tube switching device is in an insertion bobbin gripping state gripping a bobbin inserted into a spindle, A gripping confirmation rotation command output unit that outputs a gripping confirmation rotation command to slightly rotate a spindle to the motor of each of the weights in the gripping state of the insertion bobbin, and after outputting the gripping confirmation rotation command, A determining means for determining whether the spindle has rotated is provided, and a notifying means for notifying a weight whose rotation of the spindle has been confirmed by the determining means.

According to the present invention, it is confirmed by the insertion bobbin gripping state confirming means that each of the gripping devices of the tube switching device is in the gripping state of the insertion bobbin gripping the bobbin inserted into the spindle. Then, in this state, the motor of each weight is driven to slightly rotate the spindle by a command from the gripping confirmation rotation command output means. The determination means determines whether or not the spindle has rotated, and the weight whose rotation has been confirmed is reported by the reporting means as an abnormal gripping weight. Therefore, in addition to obtaining the same effect as the first aspect of the present invention, the operator can easily confirm the weight at which the gripping abnormality has occurred.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the abnormal weight detecting device further includes a command to release the gripping of the bobbin inserted into the spindle to each of the gripping devices. A grip release confirmation rotation command output means for outputting a grip release confirmation rotation command for slightly rotating a spindle to the motor of each of the weights, and the determination means keeps each spindle rotating even after the output of the grip release confirmation rotation command. It is determined whether or not it has been done.

According to the present invention, in the same manner as in the fourth aspect of the present invention, after the determination and notification of the gripping abnormality of each gripping device is performed, the motor of each weight is again turned on in the bobbin gripping released state of each gripping device. It is driven to slightly rotate the spindle. Then, the weight on which the spindle does not rotate is notified by the notification means as an abnormal grip release weight. Therefore, an effect similar to that of the third aspect is obtained.

According to a sixth aspect of the present invention, in the invention of the fourth or fifth aspect, the notifying means confirms the rotation of the spindle by a display device provided for each weight and the determining means. Driving means for driving the display device of the weight. In the present invention, gripping abnormality (gripping error)
Alternatively, when a grip release abnormality occurs, the display device of the weight is driven, so that the operator can easily check the weight in which the grip abnormality or the grip release abnormality has occurred, and can quickly perform the repair work.

According to a seventh aspect of the present invention, in the invention according to any one of the fourth to sixth aspects, the single spindle drive type spinning machine includes a monitoring device, and the rotation of the spindle is determined by the determination means. A display indicating the confirmed weight is configured to be displayed on the monitor device.

According to the present invention, the weight in which the gripping abnormality or the grip release abnormality has occurred can be confirmed by the monitor device. Therefore, when a display device is provided for each weight, the operator first checks the number (position) of the corresponding weight on the monitor device, and then goes to the position of the weight to cause a gripping abnormality or a grip release abnormality. Can be confirmed more quickly, and the repair work can be performed more quickly.

[0023]

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

As shown in FIG. 1A, a spindle driving motor (hereinafter referred to as a spindle motor) 3 for driving a spindle 2 for each spindle is provided on a spindle rail 1 of the spinning machine.
Is provided. A synchronous motor is used as the spindle motor 3, and a switch reluctance motor (SR motor) is used in this embodiment.

The spindle motor 3 is integrated with the spindle 2 supported by the bolster 4. The bolster 4 is fixed to the spindle rail 1 with the upper side inserted into the housing 5. The spindle 2 includes an upper blade 2a on which a bobbin is mounted, and a spindle shaft (not shown) fixed to a lower central portion of the upper blade 2a. The spindle 2 has a spindle shaft inserted into the bolster 4 and a bolster 4 via a bearing (not shown).
It is rotatably supported on. A rotor (rotor) 6 of the spindle motor 3 is attached to a lower end of the upper blade 2a so as to be integrally rotatable. A rotor 6 is provided in the housing 5.
A stator (stator) 7 is fixed at a position opposite to.

A magnet 8 is fixed to the spindle 2 above the rotor 6 so as to be integrally rotatable. As shown in FIG. 1B, the magnet 8 is formed in an annular shape, and two N poles and two S poles are alternately arranged in the circumferential direction. A hall IC substrate 9 is provided in the housing 5 so as to be located between the rotor 6 and the magnet 8. The Hall IC substrate 9 is fixed to the inner wall of the housing 5 at the outer periphery,
The hole IC substrate 9 has a hole 9a formed substantially at the center thereof to allow the rotor 6 to pass when the spindle 2 is inserted into or pulled out of the bolster 4. A Hall IC (Hall element) 10 is mounted on the Hall IC substrate 9 so as to face the magnet 8. In this embodiment, three Hall ICs 10 are arranged at equal angular intervals. The Hall IC 10 outputs an ON signal when corresponding to the N pole of the magnet 8, and outputs an OFF signal when corresponding to the S pole. Therefore, a pulse signal corresponding to the rotation speed of the spindle 2 is output.

The housing 5 is equipped with a motor control device 11 (shown in FIGS. 2 and 3) for controlling the spindle motor 3. AC power is supplied to the motor control device 11
A direct current converted by a / DC converter (neither is shown) is supplied. As shown in FIG.
Has an inverter 12 and a control unit 13. The control unit 13 includes a CPU 14 and a memory 15. CPU
An output signal of the Hall IC 10 (only one is shown in FIG. 2) is input to 14. A current sensor 16 for measuring a current supplied to each spindle motor 3 is provided on an arbitrary one of the three power supply lines connecting the inverter 12 and the spindle motor 3. The CPU 14 inputs the output of the current sensor 16 via an A / D converter and an interface (neither is shown). The CPU 14 stops supplying power to the spindle motor 3 of the spindle when the thread breaks. The CPU 14 obtains the current change rate from the output signal of the current sensor 16, determines that the thread breaks when the current change rate exceeds the set value, and stops the power supply to the spindle motor 3 of the spindle when the thread breaks, and also describes later. The display unit is driven.

The housing 5 is provided with a display unit 17. An LED (light emitting diode) is used for the display unit 17, and the display unit 17 is provided on the front surface of the housing 5 as shown in FIG. A switch 1 for instructing start and stop of the spindle motor 3 is provided in the housing 5.
8 are equipped.

Below the front side (left side in FIG. 1 (a)) of the spindle rail 1, there is disposed a known pipe changer 20 (only a part is shown) provided with a gripper (gripper) 19.
The refilling device 20 exchanges a full bobbin and an empty bobbin between a spindle 2 and a transfer device (not shown) disposed below the spindle rail 1 in the same manner as described in the related art. .

The total weight of the spinning frame is divided into a plurality of groups, and as shown in FIG. 3, each motor control device 11 communicates to the section control unit 21 with a plurality of weights (for example, 48 weights) as one group. It is connected via a line 22. Each section control unit 21 is connected via a communication line 22 to a machine control device 23 that controls the entire weight. The communication line 22 employs a multi-drop connection using a serial interface.
For example, RS-485 is used as a serial interface. Each section control unit 21 relays transmission and reception of signals between the control units 13 of the group connected to the section control unit 21 and the machine control device 23.

The machine control device 23 includes a CPU 24, a ROM 2
5, a RAM 26, an input device 27, an input / output interface 28, and a display 29. The CPU 24 is connected to a winding amount detecting means 30 via an input / output interface 28. A counter for integrating the number of rotations of a front roller (not shown) is used as the winding amount detecting means 30. Further, the machine control device 23 can receive a control signal from the control device 31 of the tube switching device 20.

The ROM 25 stores program data and various data necessary for its execution. The program data contains various fiber raw materials, spun yarn counts, number of twists, and other spinning conditions, as well as data on the correspondence between the spindle rotation speed during steady operation, the rotation speed of the draft drive system and the lifting drive system motor speed, and There is program data for determining whether or not there is an abnormality in the gripping device 19 during the replacement work.

The CPU 24 inputs a signal indicating the position and the state of the gripping device 19 from the control device 31 of the tube changing device 20 during the tube changing operation, and the gripping device 19 moves the empty bobbin E to the spindle 2.
In this state, the presence / absence of an abnormality of the gripping device 19 is determined, and a series of operations for notifying the abnormality are performed when an abnormality is present.

Next, the operation of the above-configured apparatus will be described. Prior to the operation of the spinning machine, spinning conditions such as the fiber raw material, the spun yarn count, and the number of twists are input to the machine controller 23 by the input device 27. Then, when the operation of the spinning machine is started, the control unit 13 of each spindle rotates the spindle motor 3 via the inverter 12 at a predetermined rotation speed in accordance with the spinning conditions based on a command from the machine control device 23. Is controlled so that

Each control unit 13 controls the current sensor 16 at a predetermined cycle.
And the presence or absence of a thread break is determined. When it is determined that the thread is broken, the spindle motor 3 is stopped, and the display unit 17 is driven (lit). The operator confirms the thread breakage weight on the display unit 17 and performs the piecing operation. That is, during operation of the machine stand, the display unit 17 functions as a thread break notification unit.

When spinning is continued and the tube is full, the operation of the machine is stopped. Then, a pipe replacement operation by the pipe replacement device 20 is started. In response to a pipe replacement work start signal from the pipe replacement device 20, the CPU 24 of the machine control device 23 starts the process of determining whether or not there is an abnormality in the gripping device 19 according to the flowchart shown in FIG.

The CPU 24 determines in step S1 that the control device 31
It is determined whether or not the gripping device 19 is disposed at a position where the empty bobbin E is inserted into the spindle 2 based on the signal from
At this time, the CPU 24 functions as an insertion bobbin gripping state checking unit. Then, as shown in FIG.
Is placed at the empty bobbin insertion position, and the CPU 2
4 confirms this by a signal from the control device 31,
Proceed to step S2. The CPU 24 outputs a drive command (gripping confirmation rotation command) for slightly driving the spindle motor 3 to the CPU 14 of each weight in step S2. Then C
The PU 24 functions as a grip confirmation rotation instruction unit. When this command signal is input, the CPU 14 applies a rotation force weaker than the normal gripping force of each gripping device 19 to the spindle 2 and drives the spindle motor 3 to rotate the spindle 2 slightly (for example, 30 to 60 degrees). . At this time,
The spindle 2 of the weight corresponding to the gripping device 19 with insufficient gripping or the gripping device 19 without the empty bobbin E is rotated.

Next, in step S3, the CPU 24 detects the weight on which the spindle 2 has rotated. The detection of the weight that the spindle 2 has rotated is performed based on the result of the CPU 14 of each weight judging from the output signal of the Hall IC 10 whether or not the spindle 2 has rotated. More specifically, after outputting a drive command to the spindle motor 3, the CPU 14 outputs the Hall IC 10
It is determined whether or not the spindle 2 has rotated based on the output signal. When the magnet 8 rotates at an angle at which the magnetic pole of the magnet 8 at the opposed position changes, the output signal of the Hall IC 10 changes from high (H) to low (L) or low (L) when the boundary between the N pole and the S pole passes. L) changes to high (H). Therefore, when the spindle 2 rotates with the driving of the spindle motor 3, for example, as shown in FIG.
If the output of C10 changes and the spindle 2 does not rotate, it does not change as shown in FIG. The CPU 14 determines that the spindle 2 has rotated the weight whose output of the Hall IC 10 has changed. And the CPU 24 is a CPU of each weight.
From 14, data on whether or not the spindle 2 has rotated is input. At this time, the Hall IC 10, the CPU 14, and the CPU
Reference numeral 24 functions as a judging means for judging whether or not each spindle 2 has rotated. The weight gripping device 19 with the spindle 2 rotated is determined to have a gripping abnormality.

Next, in step S4, the CPU 24 outputs a drive command for the display unit 10 to the CPU 14 of the weight on which the spindle 2 has rotated, and displays the position of the weight on the display 29. When the CPU 14 inputs a drive command signal for the display unit 10 from the CPU 24, the CPU 14 drives (lights) the display unit 10.

After the operation of step S4 is completed, the switching device 20
After the gripping release command is output from the control device 31 to the gripping device 19, and the gripping release command is output, the CPU 24 proceeds to step S5. In step S5, the CPU 14 of each weight drives the spindle motor 3 to slightly drive the spindle motor 3. (Grip release confirmation rotation command) is output. At this time, the CPU 24 functions as a grip release confirmation rotation instruction means. When this command signal is input, the CPU 14 applies a rotation force weaker than the normal gripping force of each gripping device 19 to the spindle 2 and drives the spindle motor 3 to slightly rotate the spindle 2.

Next, in step S6, the CPU 24 detects the weight on which the spindle 2 has rotated in the same manner as in step S3. At this time, the weight gripping device 19 in which the spindle 2 does not rotate is determined to be a grip release abnormality. And CPU2
4 proceeds to step S7 to output a drive command for the display unit 10 to the CPU 14 of the weight on which the spindle 2 has rotated, and to display the position of the weight on the display 29. CP
U14 drives (lights up) the display unit 10 when the drive command signal for the display unit 10 is input from the CPU 24. As described above, a series of processes such as the determination of the abnormality of the gripping device 19 is completed.

After the gripping device 19 is placed at a position where it does not hinder the operation of inserting the empty bobbin E into the spindle 2 by the operator or the trouble elimination process of the gripping device 19, the operator transfers the empty bobbin E to the spindle 2. Insertion takes place. Then, after the machine is restarted, an abnormality elimination process of the gripping device 19 is performed.

This embodiment has the following effects. (1) In a state where the bobbin inserted into the spindle 2 so as to be integrally rotatable is gripped by the gripping device 19, a rotational force weaker than a normal gripping force of each gripping device 19 is applied to each spindle 2 by each spindle motor 3. It is determined whether or not each gripping device 19 has a gripping abnormality based on whether or not the spindle 2 rotates. Therefore, without adding a new mechanism to the refilling device 20, the spindle driving side of each weight and a simple change of the control program of the refilling device 20 can be used. It is possible to detect the presence / absence of a gripping abnormality of the bobbin and specify the weight at which the gripping abnormality occurs.

(2) The determination as to the presence or absence of the gripping abnormality is made in a state where the pipe replacement device 20 has inserted the empty bobbin E into the spindle 2. Therefore, when there is an error in inserting the empty bobbin E into the spindle 2, the location can be specified, and the operator can quickly deal with it.

(3) After the empty bobbin E is inserted into the spindle 2 so as to be integrally rotatable, the bobbin gripping state of each gripping device 19 is released, and the spindle motor 3
Thus, a rotation force weaker than the normal gripping force of each gripping device 19 is applied, and a grip release abnormality is detected based on whether or not the spindle 2 rotates. Therefore, the probability of overlooking the abnormality of the gripping device 19 is further reduced.

(4) Since the notifying means (display unit 17) for notifying the weight of the gripping device 19 determined to be abnormal is provided, the operator can easily confirm the gripping device 19 in which the abnormality has occurred. it can.

(5) Since the notifying means includes the display unit 10 provided for each weight, the operator can easily confirm the gripping device 19 in which the abnormality has occurred, and can quickly perform the repair work.

(6) Since the monitor unit (display 29) is provided on the machine base, the weight in which the gripping abnormality or the grip release abnormality has occurred can be confirmed by the monitor device. Therefore, when a display device is provided for each weight, the operator first checks the number (position) of the corresponding weight on the monitor device, and then goes to the position of the weight to check the abnormal weight more quickly. Can,
Restoration work can be performed more quickly, and work efficiency is improved.

(7) One display unit 10 provided for each weight is used for both display of thread breakage and display of abnormality of the gripping device 19. Therefore, the cost can be reduced and the structure is simplified as compared with the case where a dedicated display unit is provided.

(8) The control unit 13 of each weight is connected to the machine control unit 23 via the section control unit 21. Therefore, when the CPU 24 obtains data or the like regarding the presence or absence of the abnormality of the gripping device 19 from each control unit 13 by the polling method, the CPU 24
By polling only the number of times, the data of all the spindles can be input, and the data collection time can be reduced.

The embodiment is not limited to the above, and may be embodied as follows, for example. The detection of the gripping abnormality of the gripping device 19 may be performed in a state where the full bobbin is gripped in order to lift the full bobbin from the spindle 2 instead of performing the state in which the empty bobbin E is inserted into the spindle 2. In this case, it is possible to omit the sensor for detecting the remaining unspooled bobbin provided in the conventional spinning machine, but it may be used in combination with the sensor to ensure reliability.

The rotation detecting means constituting the means for judging whether or not the spindle 2 rotates when a rotational force weaker than the normal gripping force of each gripping device 19 is applied. A rotary encoder or other magnetic sensor may be used. In addition, the spindle motor 3
The amount of current supplied to the spindle 2 may be detected, and the value may be compared with a predetermined value to determine whether the spindle 2 has rotated.

The abnormality detection of the gripping device 19 may be performed only by detecting the gripping abnormality. In this case, steps S5 to S7 are omitted in the flowchart of FIG.

Each of the motor control devices 11 may determine whether or not the gripping device 19 corresponding to each of the weights is abnormal, and may drive (turn on) the display unit 17 when it determines that there is an abnormality.

The controller 13 of each motor controller 11 and the machine controller 23 may be connected to each other via the LAN 32 without providing the section control unit 21 as shown in FIG. Ethernet (registered trademark) is used for the LAN 32. In this configuration, the machine control device 23
It is possible to output data from the respective control units 13 to the machine control device 23 without performing polling from and exchanging data with the control unit 13. As a result, it is possible to further reduce the time required for the machine control device 23 to obtain data and the like for all the weights.

The machine control device 23 may be connected to a host computer via a local area network (LAN) so that the status of each machine can be monitored by the host computer.

The pipe replacement operation may be continued, and the operation of the main body may be started and continued while only the weight in which the abnormality is detected is stopped. A display unit for notifying the thread breakage and displaying an abnormality of the gripping device may be provided separately.

The detection of the thread breakage of each spindle is not limited to the method in which the current supplied to the spindle motor 3 is detected by the current sensor 16, and a thread breakage detection sensor of another system may be used. Instead of providing the inverter 12 for each spindle, a configuration in which the spindle motors 3 of all spindles are driven and controlled via one inverter, or the spindle motors 3 are divided into a plurality of groups and one inverter is provided for each group. A configuration may be provided. In this case, the number of inverters is reduced, and the manufacturing cost is reduced.

As the spindle motor 3, a synchronous reactance motor, a permanent magnet type synchronous motor, a step motor or the like may be used instead of the SR motor. The present invention is not limited to the ring spinning machine, and may be applied to a single-spindle drive type ring twisting machine or the like.

The technical ideas (inventions) other than those described in the claims that can be understood from the above embodiments will be described below together with their effects. (1) In the invention according to any one of claims 4 to 7, the determination means includes a Hall element (Hall IC) for detecting a magnet rotating integrally with the spindle.

(2) In the invention as set forth in any one of claims 4 to 7, the determining means includes a current sensor for detecting an amount of current supplied to a motor for driving the spindle, and an output signal from the current sensor. Comparing means for comparing with a predetermined value.

[0062]

As described in detail above, according to the first to seventh aspects of the present invention, the features of the single-spindle drive type spinning machine can be utilized to provide a simple structure for each holding device of the pipe replacement device. It is possible to detect the presence or absence of a gripping error of a full bobbin or an empty bobbin and to specify a weight at which a gripping error has occurred. Further, according to the inventions described in claims 4 to 7, the operator can easily confirm the weight at which the gripping abnormality has occurred.

[Brief description of the drawings]

FIG. 1A is a partially cutaway schematic side view showing a weight according to an embodiment, and FIG. 1B is a schematic view showing a relationship between a magnet and a Hall IC.

FIG. 2 is a block diagram of a spindle control device.

FIG. 3 is a block circuit diagram showing an electrical configuration.

FIG. 4 is a schematic side view showing a state in which an empty bobbin is inserted into a spindle by the pipe replacement device.

FIG. 5 is a flowchart showing a procedure for detecting and notifying an abnormality of the gripping device.

6A is a time chart of an output signal of the Hall IC when the spindle rotates, and FIG. 6B is a time chart when the spindle does not rotate.

FIG. 7 is a block circuit diagram showing an electrical configuration of another embodiment.

FIG. 8 is a schematic side view illustrating the operation of the tube replacement device.

[Explanation of symbols]

2 ... Spindle, 3 ... Spindle motor, 10 ... Hall IC constituting judging means, 13 ... Control unit as driving means constituting notifying means, 15 ... CP constituting judging means
U, 17: a display unit as a display device constituting the notifying means, 19: a gripping device, 20: a tube changing device, 24 ... a judging device and an insertion bobbin gripping state confirming device, a gripping confirmation rotation command output device, and a gripping device. CPU as release confirmation rotation command output means; 29... Display as monitor device.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kimoto Minoshima 2-1-1 Toyota-cho, Kariya-shi, Aichi F-term in Toyota Industries Corporation (reference) 4L056 AA02 AA32 BF02 BF08 BF09 BF13 BF19 BF23 BF24 BF27 BF36 BF52 BF58 DA33 EA12 EA15 EB14 EC55 EC83 ED11

Claims (7)

[Claims] 1. A single-spindle driven spinning machine equipped with a large number of weights and independently driving spindles of the respective weights by motors provided for the respective weights, and bobbin removal from the spindles Sometimes, a rotating force weaker than a normal gripping force of each gripping device is applied to each spindle by each motor in a state where the bobbin inserted integrally rotatably into the spindle is gripped by each gripping device of the tube replacement device. Then, the presence or absence of a gripping abnormality of each gripping device is determined based on whether or not the spindle rotates, and the gripping device corresponding to the weight on which the spindle rotates is determined to be a gripping abnormality. Method. 2. The method according to claim 1, wherein the determination as to the presence or absence of the gripping abnormality is performed in a state where the pipe replacement device has an empty bobbin inserted into a spindle. 3. When the bobbin is mounted on the spindle, when the bobbin gripping state of each gripping device is released, a rotational force weaker than a normal gripping force of each gripping device is applied to each spindle by each of the motors so that the spindle does not rotate. 3. The method for detecting an abnormality of a tube switching device of a single-spindle-driven spinning machine according to claim 2, wherein the gripping device corresponding to (a) is determined to be a gripping abnormality. 4. A single-spindle driven spinning machine equipped with a large number of weights and independently driving spindles of the respective weights by motors provided for the respective weights, and having a refilling device. An insertion bobbin gripping state confirming means for confirming that each gripping device is in an insertion bobbin gripping state gripping a bobbin inserted into the spindle, and a motor for each of the weights when the gripping device is in the insertion bobbin gripping state. Gripping confirmation rotation command output means for outputting a gripping confirmation rotation command for slightly rotating the spindle; determining means for judging whether or not each spindle has rotated after outputting the gripping confirmation rotation command; An abnormality detecting device for a tube changing device of a single-spindle-driven spinning machine, comprising: a notifying unit for notifying a weight whose rotation of a spindle is confirmed by the means. 5. The abnormal weight detection device further includes a grip release confirmation that slightly rotates the spindle by the motor of each weight after the grip release command of the bobbin inserted into the spindle is output to each of the grip devices. 5. The single spindle drive according to claim 4, further comprising a grip release confirmation rotation command output unit that outputs a rotation command, wherein the determination unit determines whether each spindle has rotated even after the output of the grip release confirmation rotation command. Abnormality detection device of the tube changing device of the spinning machine. 6. The informing means comprises a display device provided for each weight, and a driving means for driving the display device of the weight whose rotation of the spindle has been confirmed by the determining means. Item 6. An abnormality detection device for a tube switching device of a single spindle drive type spinning machine according to item 5. 7. The single-spindle-driven spinning machine includes a monitor device, and a display indicating a weight whose rotation of the spindle has been confirmed by the determination means can be displayed on the monitor device. 7. The abnormality detection device for a tube switching device of a single spindle drive type spinning machine according to any one of 6.