JP3235564B2 - Single-spindle drive type multiple twisting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-twisting machine for twisting and unwinding a yarn unwound from a yarn supply package, and more particularly to a rotation direction setting system provided in a single-mass drive type multi-twisting machine. .

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional multiple twisting machine includes a plurality of multiple twisting units each having a spindle device 101a and a winding device 101b. Traverse guide 10
7 and a drive mechanism 110 for driving the spindle 103. The spindle device 101a is a belt 1
04, the driving force of the driving motor 113 is
3 to twist the yarn.
Further, the winding device 101b winds the yarn twisted by the spindle device 101a around the winding package 105 while traversing the traverse guide 107 via the feed roller 108.

The driving mechanism 110 mainly includes a driving motor 113 and a plurality of pulleys 111, 112, 115, 11
6, 117 and 119 and belts 104 and 118, and the winding drum 106, the traverse guide 107, and the spindle 103 are driven by one drive motor 113. Note that the spindle 103 has an output shaft 114, a third pulley 115,
The power is transmitted to the traveling belt 104 via the belt 118, the fifth pulley 117, and the first pulley 111 to be driven. The output of the drive motor 113 is output shaft 114, fourth pulley 116, belt 12
0, the sixth pulley 119, the speed change belt device 150, the speed reduction box 123, and the belt 130. Further, the traverse guide 107
The rotation of the support shaft 126 is transmitted to the grooved drum 137 via the belt 134, and the cam shoe 139 moves along the groove 138 due to the rotation of the grooved drum 137, so that the cam shoe 139 reciprocates.

However, when the spindle device 101a and the winding device 101b are driven by one drive motor 113 as in a conventional multiple twisting machine, a plurality of pulleys are rotated by the belts 104 and 120, resulting in a large mechanical loss. Since power consumption becomes excessive, the spindle drive system and the take-up drum drive system are driven by separate motors,
A single spindle drive type multiple twisting machine has been developed in which a spindle drive motor is provided for each spindle device and driven independently.

[0005]

However, the conventional single-spindle drive type multiple twisting machine does not allow the rotation direction of each spindle drive motor to be arbitrarily set or changed, and is suitable for production of many kinds of small lots. There was a problem that there was no.

Accordingly, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a single-spindle drive type multi-twisting machine capable of coping with the production of many kinds and small lots.

[0007]

According to the first aspect of the present invention,
A spindle drive motor is provided for each spindle for imparting twist to the yarn, and in a single-spindle drive type multiple twisting machine in which each spindle drive motor is driven by a rotation speed control device, the rotation direction of each spindle drive motor can be arbitrarily set. A rotation direction setting unit that can be set and changed, and a switching unit that switches an output to the spindle drive motor according to the set rotation direction, wherein the switching unit is provided in each of the rotation speed control devices. Features. Thereby, since the rotation direction of each spindle drive motor can be set arbitrarily, it is possible to appropriately cope with multi-product small-lot production.

According to a second aspect of the invention, in addition to the configuration of the first aspect, the rotation direction setting means is connected to a plurality of rotation speed control devices via a common communication line. Is provided, via the common communication line from the central control device, the rotation direction setting data including data for specifying the rotation speed control device or data for specifying the spindle and data indicating the rotation direction. The transmission is transmitted to each rotation speed control device. This makes it possible to easily set the rotation direction for each rotation speed control device via a common communication line without complicating the wiring. That is, since the rotation direction setting data to be transmitted includes data for specifying the rotation speed control device or data for specifying the spindle and data indicating the rotation direction, for example, for each spindle, each rotation speed control device The rotation direction can be set / changed for each span, for each span including a plurality of spindles, or collectively for all spindles, so that multi-product small-lot production can be more appropriately handled.

According to a third aspect of the present invention, in addition to the configuration of the second aspect, the rotation direction setting means sets the rotation direction by inputting a start weight and a final weight for setting the rotation direction to the central control device. It is characterized by that. This is very effective especially when setting rotation directions by grouping in an arbitrary range, and it is possible to more appropriately cope with multi-kind small lot production.

According to a fourth aspect of the present invention, in addition to the configuration of the second or third aspect, the rotation direction setting means is provided for each rotation speed control device for each of the spindle drive motors. And a validity changeover switch for switching between valid / invalid of a rotation speed setting means provided for each rotation speed control device is provided for each rotation speed control device. Thus, even in the case of a trouble in the communication system, it is possible to change the setting of the rotation direction of each spindle drive motor, and it is possible to more appropriately cope with multi-product small-lot production.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the multiple twisting machine 1 is configured such that a yarn winding unit U having a weight of 80 to 308 is arranged in a line. The one-weight yarn winding unit U has a spindle device 2 and a winding device 3 provided on the spindle device 2 so as to wind the yarn of the single yarn supply package 8 onto the winding package P. I have.

The spindle device 2 includes a yarn supply package 8, a stationary platen 31, a tension device 32, a rotary disk 33, and a spindle drive motor 6, and the yarn Y is driven by the spindle drive motor 6. It is twisted. This spindle drive motor 6 has a DC
A brushless motor BLM is used, and a rotating disk 33 is provided on an output shaft thereof. The rotating disk 33 is provided with a stationary platen 31 so that one yarn supply package 8 can be placed on the stationary platen 31. Further, a tension device 32 is provided above the yarn supply package 8, and a tension device 3 is provided.
Numeral 2 applies a predetermined tension to the yarn Y unwound from the yarn supply package 8.

Accordingly, the spindle device 2 puts the yarn Y unwound from the yarn supply package 8 into the tension device 32 and applies tension thereto, while the spindle driving motor 6
Thus, the rotary disk 33 is rotated at a high speed, and the yarn Y is ballooned to the balloon guide 37. Further, the yarn Y is twisted once from the tension device 32 to the rotating disk 33, and again twisted from the rotating disk 33 to the balloon guide 37.

The winding device 3 has a winding drum 21, a winding package P, a traverse guide 29, a feed roller 26, and a cradle 40, as shown in FIG. The yarn Y twisted at 2 is wound around a winding package P. The winding package P is rotatably supported by the cradle 40, and the winding drum 21 is pressed against the winding package P. Thereby, the winding device 3 applies the yarn Y twisted twice in total as described above to the balloon guide 3.
From 7, the traverse guide 29 traverses through guide rollers 38 and 39 and the feed roller 26, and winds up the winding package P.

As shown in FIG. 1, in addition to the above-described yarn winding unit U, a drive system 5 for collectively driving the winding devices 3 and the spindle devices 2 and And a control system 7 for controlling each winding device 3. The drive system 5 includes a winding drum drive motor 4, a first pulley 10, a belt 11, a second pulley 12, a speed reducer 17, a third pulley 16, a fourth pulley 19, and a belt 20. , A fifth pulley 22, a sixth pulley 24, a seventh pulley 13, a belt 14, an eighth pulley 15, and a cam box 27. Winding drum 21 of yarn winding unit U
And the feed roller 26 is rotated, and the traverse guide 29 is reciprocated.

The take-up drum drive motor 4 is an induction motor IM. The output shaft of the take-up drum drive motor 4 is provided with a first pulley 10 and a second pulley 12 via a belt 11. The speed reducer 17 has a plurality of gears (not shown). When the driving force of the winding drum drive motor 4 is transmitted through the second pulley 12, the speed reducer 17 decelerates at a constant rate and simultaneously changes the rotation direction. It is designed to convert. Further, the speed reducer 17 has two output shafts, one shaft input and two shaft output, the third pulley 16 is fitted to one output shaft, and the other output shaft is The seventh pulley 13 is fitted.

The third pulley 16 is provided with a fourth pulley 19 fitted on a support shaft 18 via a belt 20, and a plurality of winding drums 21 are mounted on the support shaft 18 at predetermined intervals. Are provided at intervals. In addition, the above support shaft 1
8 is fitted with a fifth pulley 22 in parallel with the fourth pulley 19. The fifth pulley 22 is provided with a sixth pulley 24 fitted to a support shaft 23 via a belt 25, and a plurality of feed rollers 26 are provided on the support shaft 23 at predetermined intervals. Is provided. By this
The drive system 5 outputs the driving force decelerated by the speed reducer 11,
The power is transmitted to each winding drum 21 via the third pulley 16, the belt 20, and the fourth pulley 19, and the fifth pulley 22,
Feed roller 2 via belt 25 and sixth pulley 24
6.

Further, the above-described speed reducer 17 is provided with the seventh pulley 1.
3, the belt 14 and the eighth pulley 15 are connected to the cam box 27. A reciprocating rod 28 is connected to the cam box 27 so as to convert a rotational force into a reciprocating motion. A traverse guide 29 is fitted on the reciprocating rod 28 at a predetermined interval.
Accordingly, the drive system 5 reciprocates the traverse guide 29 to wind the yarn Y twisted by the spindle device 2 while traversing the yarn Y, and presses the yarn Y onto the winding drum 21 and rotates the winding package P. It is made to take.

As shown in FIG. 3, the control system 7
It has a main body control unit 42 and a plurality of unit control units 9 for controlling each spindle device 2, and constitutes a control system of the single weight drive type multiple twisting machine 1. The main body controller 42 includes a converter 35 for converting the voltage of the AC power supply 34 and a host CPU 36 constituting a central controller.
And a rotation speed control device 41 for the winding drum drive motor. Various control commands are simultaneously output to each unit control section 9 and the rotation speed control device 41 for the winding drum drive motor. It has become.

The host CPU 36 is connected to the communication line 4
Various control commands such as parameters are simultaneously transmitted directly to each unit control unit 9 and the rotation speed control device 41 for the winding drum drive motor via the control unit 6. The host CPU 36 simultaneously transmits start / stop commands to the unit control units 9 and the rotation speed control device 41 for the winding drum drive motor directly via the control signal line 54. The converter 35 has an AC / DC converter 35a and a DC / DC converter 35b. The AC / DC converter 35a has a DC bus 47 for rotating a winding drum drive motor. The number control device 41 is connected. The DC / DC converter 35b includes a host CP
U36 is connected, and the DC / DC converter 35b
The 290 V DC voltage is converted to a 24 V DC voltage for use as a control system voltage of the host CPU 36.

The rotation speed control device 41 for the winding drum drive motor receives the supply of a 290 V DC voltage via the DC bus 47 and uses the control commands such as parameters received via the communication line 46. , Pulse generator PG
The winding drum drive motor 4 is independently feedback-controlled by the number of rotations from 52.

Each unit control section 9 has 32 rotation speed control devices 44 for a spindle drive motor, one repeater 45, and one DC transformer 43 for a spindle device. It is connected in parallel to the main controller 42 via a communication line 46. To the repeater 45, 32 rotation speed control devices 44 are connected in parallel via a communication line 51. The repeater 45 relays a control command output from the host CPU 36 and Rotation speed control device 4
4 is transmitted to the control command.

The above-described DC transformer 43 for each spindle device.
Are connected in parallel to the DC bus 47, and the 290 V supplied through the DC bus 47 during normal operation.
Is converted into a DC voltage of 24 V used as a control system voltage for controlling the spindle drive motor 6 and supplied.

Thirty-two rotation speed control devices 44 for the respective spindle drive motors are connected in series to the DC transformer 43 for the spindle device via a control power supply line 49. A relay connector board 5 is provided between the 32 rotational speed control devices and the DC transformer 43 for the spindle device.
The control power supply line 49 is connected from the DC transformer 43 for the spindle device to the relay connector board 5.
3 is connected to the rotation speed control device group and the repeater 45. Also, two spindle drive motors 2 are connected to each rotation speed control device 44, and each rotation speed control device 44 receives a control command via the communication line 46, the repeater 45, and the communication line 51. Thus, each spindle drive motor 6 is independently feedback-controlled by the number of rotations from a built-in sensor. That is, two spindle drive motors 6 are driven by one rotation speed control device 44.
It is designed to stop. In addition, each rotation speed control device 4
Reference numerals 1 and 44 individually drive and stop the motors 4 and 6 respectively.

Next, the main part of the single-spindle-drive type multiple twisting machine 1 according to the present embodiment will be described. As shown in FIGS. 1 and 3, the main body control device 42 is provided with an operation unit 48 that constitutes a rotation direction setting unit so that the rotation direction of the spindle drive motor 6 can be arbitrarily set or changed. It has become. Further, the rotation speed control device 44 for each spindle drive motor has a switching unit 44a that constitutes a switching unit, and switches the output to the spindle drive motor 6 according to the rotation direction set by the operation unit 48. It has become.

The operation unit 48 is connected to the host CPU 36 (rotation direction setting means) constituting the central control unit, and can set and change the rotation direction of the spindle drive motor 6 by operating keys. . In addition, the range in which the rotation direction can be set is collectively set according to various modes such as each rotation speed control device 44 for each spindle drive motor, each span composed of a plurality of spindle drive motors, or all spindle drive motors 6, and the like. It can be easily set. For example, when twisting from the first weight to the 64th weight by S twisting, the rotation direction is set to S twisting by operating the keys of the operation unit 48, and then “1” and “64” are input. With this, the range can be set and changed.

The operation unit 48 sets and changes the number of rotations for each of the rotation speed control devices 44 for each spindle drive motor and for each span of the plurality of spindle drive motors 6 in the same manner as for the setting and change of the rotation direction. Alternatively, all the spindle drive motors 6 can be set and changed collectively. still,
During winding, no setting or change is accepted even if the rotation direction and the number of rotations are set or changed.

Next, the host CPU 36 transmits the rotation direction setting data set / changed by the operation section 36 to the communication line 46 (rotation direction setting means), the repeater 45 (rotation direction setting means), and the communication line 51 (rotation direction setting means). The setting is transmitted to the switching unit 44a via the setting unit. The rotation direction setting data includes data (rotation speed No.) for specifying the rotation speed control device 44, data (spindle No.) for specifying the spindle, and data indicating the rotation direction (S twist or Z twist). ).

A rotation direction changeover switch 50 constituting a rotation direction setting means is connected to the rotation speed control device 44 for each spindle drive motor one by one via a validity changeover switch 56. The rotation direction switch 50 has an S twist switch and a Z twist switch. When the operator presses either the S twist switch or the Z twist switch, the switching unit 4 is switched via the validity switch 56.
The rotation direction setting data is transmitted to 4a.

The validity changeover switch 56 is a switch for fixing the rotation direction in a hardware manner regardless of the setting by communication from the host CPU 36. Whether to switch or not. That is, when the validity changeover switch 56 is valid (in the ON state), the rotation direction setting data by the rotation direction changeover switch 50 is changed to the changeover unit 4.
4a, and is not transmitted to the switching unit 44a when the validity changeover switch is ineffective (in an OFF state).

The switching unit 44a is connected to the host CPU 36
Alternatively, the switching order of the power elements for driving the spindle drive motor 6 is changed according to the rotation direction setting data received from the rotation direction switch 50. When the rotation direction is set or changed by the rotation direction switch 50, the rotation direction is switched by giving priority to the rotation direction setting data by the rotation direction switch 50.

That is, when the validity changeover switch 56 is valid (in the ON state), the changeover section 44a receives the rotation direction setting data from the rotation direction changeover switch 50 and rotates the spindle drive motor 6 in the set direction. If the validity changeover switch is invalid (OF
F state), the host CPU 36 sends the communication line 51
The spindle drive motor 6 in the rotation direction set via
Is to be rotated. As described above, the rotation speed control device 44 for the spindle drive motor switches the rotation direction (output) of the spindle drive motor 6.

The operation of the single-spindle drive type multi-twisting machine 1 in the above configuration will be described with reference to the drawings. The operator operates the operation unit 4 of the host CPU 36 as shown in FIGS.
8 is set to a desired state by operating the keys.
Here, an example will be described in which the first to 64th weights are set to S-twist and the others to Z-twist. The operator sets the rotation direction to S twist by operating the keys of the operation unit 48,
Enter "1" and "64". When the operator completes the input, the host CPU 36 transmits the input rotation direction setting data to each repeater 45 via the communication line 46. Then, each repeater transmits the rotation direction setting data to each rotation speed control device 44. When the switching unit 44a of each rotation speed control device 44 receives the rotation direction setting data, the setting of the rotation direction is completed.

Next, when the operator starts the operation of the single-spindle drive type multi-twisting machine 1, the converter 35, the DC bus 47, the DC transformer 43 for the spindle device from the AC power source 34.
, A DC voltage of 24 V is supplied to each rotation speed control device 44. Further, a start command is transmitted from the host CPU 36 via the control signal line 54 to each of the relay connector boards 5.
3 and transmitted simultaneously from each relay connector board 53 to the rotation speed control device 44 for the spindle drive motor via the control signal line 55. Each spindle drive motor 6 is driven based on a start command from each rotation speed control device 44, and each rotating disk 33 rotates at the same rotation speed as each spindle drive motor 6. Each rotating disk 33
Is rotated, the yarn Y unwound from the yarn supply package 8 is rotated.
Enters the tensioning device 32, is twisted once while being tensioned, and is twisted once more, so that the balloon guide 3
Balloon up to 7.

On the other hand, from an AC power supply 34, a converter 35,
A DC voltage of 290 V is supplied to the rotation speed control device 41 for the winding drum drive motor via the DC bus 47, and a start command is sent from the host CPU 36 to the rotation speed control device 41 via the control signal line 54. Sent. The take-up drum drive motor 4 is driven based on a start command of the rotation speed control device 41, and its output is output to each of the pulleys 10, 12, 16
・ 19 ・ 22 ・ 24, Belt 11.14 ・ 20 ・ 25,
Each of the support shafts 18 via the speed reducer 17 and the cam box 27
The traverse guide 29 of each weight reciprocates while the winding drum 21 and the feed roller 26 of each weight rotate while being transmitted to the reciprocating rod 23 and the reciprocating rod 28.

When the winding drum 21 of each weight and the feed roller 26 rotate and the traverse guide 29 of each weight reciprocates, the yarn Y twisted twice by the spindle device 2 is moved to the traverse guide 29. Is wound around the winding package P while being traversed. In the traverse, the traverse angle is corrected by the speed reducer 17.

As a result, since the rotation direction of each spindle drive motor can be set arbitrarily and wound,
A wide variety of winding packages P can be produced. Further, when setting / changing the rotation direction, the rotation direction setting data is transmitted to the plurality of rotation speed control devices 44 via the repeater 45, so that the operation unit 48 connected to the host CPU 36 controls the rotation direction. Settings can be easily made collectively. Further, even when a number of winding units U are arranged in rows, each rotation speed control device 4
4 can surely receive the rotation direction setting data via the repeater 45, so that the omission of the rotation direction command can be prevented.

On the other hand, due to a trouble in the communication lines 46 and 51, for example, the rotation speed control device 4 of the first to sixteenth weights is used.
When the rotation direction setting data set by the key operation of the operation unit 48 cannot be received, the operator sets the validity changeover switch 56 of the first weight to the sixteenth weight to an effective state (ON state). The S direction is set by the rotation direction switch 50.

Thus, even when a trouble occurs in the communication system, the validity switch 56 is enabled (ON).
State), the setting / change can be performed by the rotation direction switch 50. Note that, in a normal case where the rotation direction is set by a key operation of the operation unit 48, the validity switch 56 is in a non-valid state (OFF state).

The control power supply line 49 of the multiple twisting machine 1 according to the present embodiment is connected to a control system voltage (24 V) for controlling the spindle drive motor 6 by each of the rotation speed control devices 44.
It is for supplying to. The control signal lines 54 and 55 are for transmitting a start command or a stop command to the total rotation speed control devices 41 and 44, and are for transmitting a simultaneous start or simultaneous stop signal of a normal machine. Things. Further, the communication lines 46 and 51 are used to monitor the number of revolutions of each motor 6 and command values for each motor 6 by the host CPU 36, and to control the control parameters from the host CPU 36 to the respective revolution number control devices 41 and 44. It is for setting.

In this embodiment, since two spindle drive motors 6 are connected to the spindle drive motor rotational speed control device 44, the minimum unit that can be set or changed in the rotation direction is each spindle drive motor. For each rotation speed control device 44. Therefore, although it can be set and changed in units of two spindles, it is needless to say that it can be set and changed in units of one spindle as needed. During operation, the communication line 46 is used for extracting the number of rotations of the spindle device 2 from each winding weight, monitoring for occurrence of an abnormality, and the like.

In this embodiment, the rotation speed control device 44 for the spindle drive motor is described as constituting each unit control section 9 for every 32 units.
Is not limited to 32. In addition, although it has been described that two spindle drive motors 6 are connected to the rotation speed control device 44 for the spindle drive motor, the number of spindle drive motors is not limited to two. Furthermore, a case has been described in which a single yarn supply package 8 is provided in each yarn winding unit U, but the present invention is not limited to this, and a plurality of yarn supply packages may be provided. The above D
The C brushless motor has a built-in sensor (not shown) for detecting its rotation speed.

In the multiple twisting machine 1 according to the present embodiment,
Although the double twisting machine in which the twisting is performed twice by one rotation of the spindle device 2 has been described, another triple or quadruple twisting machine may be used. In the present embodiment, the switching unit 44a
Although the switching direction has been described as the S-twist and the Z-twist, the switching unit 44a may be any unit that switches between the forward direction and the reverse direction.

[0044]

According to the first aspect of the present invention, there is provided a single-spindle drive type multiply twisted yarn in which a spindle drive motor is provided for each spindle for imparting twist to a yarn, and each of the spindle drive motors is driven by a rotation speed control device. In the machine, has a rotation direction setting means that can arbitrarily set and change the rotation direction of each spindle drive motor, and switching means for switching the output to the spindle drive motor according to the set rotation direction, the switching means, This is a configuration provided in each of the rotation speed control devices. Thereby, since the rotation direction of each spindle drive motor can be set arbitrarily, there is an effect that it is possible to appropriately cope with multi-product small-lot production.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the rotation direction setting means is connected to a central control device connected to a plurality of rotation speed control devices via a common communication line. Is provided, via the common communication line from the central control device, the rotation direction setting data including data for specifying the rotation speed control device or data for specifying the spindle and data indicating the rotation direction. The transmission is transmitted to each rotation speed control device. This makes it possible to easily set the rotation direction for each rotation speed control device via a common communication line without complicating the wiring. That is, since the rotation direction setting data to be transmitted includes data for specifying the rotation speed control device or data for specifying the spindle and data indicating the rotation direction, for example, for each spindle, each rotation speed control device The rotation direction can be set / changed for each span, for each span including a plurality of spindles, or collectively for all spindles, and the effect is achieved that multi-product small-lot production can be handled more appropriately.

According to a third aspect of the present invention, in addition to the configuration of the second aspect, the rotation direction setting means sets the rotation direction by inputting a starting weight and a final weight to the central control device. It is a configuration to do. This is very effective especially when setting the rotation direction by grouping in an arbitrary range, and it is possible to more appropriately cope with multi-kind small lot production.

According to a fourth aspect of the present invention, in addition to the configuration of the second or third aspect, the rotation direction setting means is provided for each rotation speed control device for each of the spindle drive motors. In this configuration, a validity changeover switch for switching between valid and invalid of the rotation speed setting means provided for each rotation speed control device is provided for each rotation speed control device. This makes it possible to change the setting of the rotation direction of each spindle drive motor even in the case of a trouble in the communication system, and has an effect that it is possible to more appropriately cope with multi-product small-lot production.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a single-spindle drive type multiple twisting machine according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a winding device and a spindle device.

FIG. 3 is a block diagram for explaining a rotation direction setting / change system of a single weight drive type multiple twisting machine.

FIG. 4 is a diagram illustrating a conventional multiple twisting machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Single spindle drive type multiple twisting machine 2 Spindle device 3 Winding device 4 Winding drum drive motor 5 Drive system 6 Spindle drive motor 7 Control system 8 Yarn supply package 9 Unit control unit 34 AC power supply 35 Converter 36 Host CPU 41 Winding Rotation speed control device for drum drive motor 42 Main body control device 43 DC transformer for spindle device 44 Rotation speed control device for spindle drive motor 45 Repeater 46 Communication line 47 DC bus 48 Operation unit 49 Power supply line for control 50 Rotation direction Changeover switch 51 Communication line 52 Pulse generator 53 Relay connector board 54 Control signal line 55 Control signal line 56 Validity changeover switch

Claims (4)

(57) [Claims] 1. A single-spindle drive type multiple twisting machine in which a spindle drive motor is provided for each spindle for imparting twist to a yarn, and each of the spindle drive motors is driven by a rotation speed control device. A rotation direction setting unit that can arbitrarily set and change the rotation direction; and a switching unit that switches an output to the spindle drive motor according to the set rotation direction. The switching unit is provided in each of the rotation speed control devices. A single-spindle-drive type multi-twisting machine characterized in that: 2. The rotation direction setting means is provided in a central control device connected to a plurality of rotation speed control devices via a common communication line, and is provided from the central control device via the common communication line. The rotation direction setting data including data for specifying the rotation speed control device or data for specifying the spindle and data indicating the rotation direction is transmitted to each rotation speed control device. 1
The single-spindle drive type multiple twisting machine described in the above. 3. The single weight drive type according to claim 2, wherein said rotation direction setting means sets the rotation direction by inputting a starting weight and a final weight for setting a rotation direction to a central control device. Multiple twisting machine. 4. The rotation direction setting means is provided for each rotation speed control device for each of the spindle drive motors, and enables / disables the rotation speed setting means provided for each rotation speed control device. The single weight drive type multiple twisting machine according to claim 2 or 3, wherein a switching switch for validity is provided for each rotation speed control device.