JPS6330414B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for controlling the drive of a sliver delivery roller in a Muille spinning machine.

(Prior art) In a conventional mill spinning machine, the sliver sending roller is rotatably driven via a chain or the like whose one end is connected to a drive shaft fixed to the headstock and the other end is connected to the sliver sending roller. The rotation of the drive shaft is transmitted to the draft setting mechanism by a circulating operation of a chain, and the rotation conditions of the sliver delivery roller are set by replacing the gears of the draft setting mechanism.

(Problems to be Solved by the Invention) Therefore, in the conventional Muille spinning machine, the mechanism for transmitting rotation to the sliver delivery roller is complicated, and the operation for changing the rotation conditions of the sliver delivery roller is complicated. A problem arose.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for controlling the drive of a sliver delivery roller in a Muille spinning machine, which solves the above-mentioned problems, simplifies the mechanism, and simplifies speed change operations.

(Means for Solving the Problems) The present invention starts a servo motor provided for rotationally driving a sliver feed roller in synchronization with the start of outward movement of a spindle carriage, and proportionally controlling the rotational speed of the servo motor based on a speed signal from a first detection device provided to detect the speed;
Furthermore, when the number of pulses transmitted from a second detection device provided to detect the cumulative rotation speed of the servo motor matches the cumulative rotation value of the sliver feed roller, which is preset based on the draft magnification. The gist of the present invention is to provide a drive control method for a sliver sending roller in a Muille spinning machine, in which the rotation of the servo motor is stopped and the rotation of the sliver sending roller is stopped during the outward movement of the spindle carriage.

(Function) The present invention includes a servo motor for driving a sliver feed roller, a first detection device for detecting the outward traveling speed of the spindle carriage, and a second detection device for detecting the cumulative rotation speed of the servo motor. A detection device is provided, and when drafting and twisting the sliver, the sliver delivery roller is started in synchronization with the start of outward movement of the spindle carriage, and then the servo motor is activated by the signal from the first detection device to activate the sliver delivery roller. The speed of the sliver delivery roller is controlled by controlling the rotation so that the rotation speed is proportional to the outward traveling speed of the spindle carriage, and the sliver delivery roller is preset based on the signal of the second detection device and the draft magnification. The rotation of the sliver feed roller is continued until the cumulative rotation value of .

(Example) Next, an example of an apparatus used to implement the present invention and a method of implementing the present invention using this apparatus will be described with reference to the drawings.

In a Muille spinning machine configured such that a spindle carriage and a sliver carriage move synchronously in opposite directions, a spindle carriage 1 with a plurality of spindles 2 rotatably supported at its upper end is connected to a rail 26 via a wheel 27. It is driven by the variable speed drive mechanism of the headstock 24 and travels outward from the headstock 24 side to the operation console 25 side (direction P1 in the figure), turns back at the outward movement end, and moves from the operation console 25 side to the headstock 24. side (illustrated P2
It repeats the reciprocating motion of traveling inward in the direction of 1), turning around at the inward end, and traveling outward again. However, the spindle carriage 1 is driven at a non-uniform speed so that the traveling speed reaches the maximum during the travel.

The backshaft 19 is reversibly suspended near the lower end of the stand 12 installed on the side of the head stock 24, and the timing belt 16 has one end fixed to the rear side of the spindle carriage 1 and the other end connected to the spindle carriage 1. It is tethered to the front side of garage 1,
In addition, the pulley 1 fitted to the back shaft 19
7 and a pulley 14 rotatably supported by a bracket 15 at the lower end of the operating table 25, and when the spindle carriage 1 moves outward or inwards, the running motion of the spindle carriage 1 is transmitted to the back shaft 19. As a result, the backshaft 19 is rotated in forward and reverse directions.

The first encoder 20 is the spindle carriage 1
It is attached to the shaft end of the backshaft 19 in order to detect the traveling speed of the motor vehicle and transmit a pulse signal.

The sliver carriage 7 mounted on the base 11 installed on the stand 12 so as to be movable in the front and back direction via the rail 10 and the wheels 8 is a chain that is rotationally driven by the forward and reverse rotation of the back shaft 19. A chain 22 hung on the wheels 21, 21 is connected via a traverse guide 9 attached to the rear end of the sliver carriage 7, and the running direction of the spindle carriage 1 is controlled by the circulation movement of the chain 22. It moves in the opposite direction to the direction shown in FIG.

The servo motor 28 is installed at the rear end of the sliver carriage 7 to drive and control a pair of front and rear sliver feed rollers 3, 3, which are rotatably mounted horizontally on the front end of the sliver carriage 7.
8 can roll onto both sliver feed-out rollers 3 and both sliver feed-out rollers 3 via a belt 32 hooked around a pulley 30 on the servo motor 28 side and a pulley 31 on the sliver feed-out roller 3 side. The signal is transmitted to the top roller 4 placed on the top roller 4.

The sliver 23, which is placed so as to be able to roll on the sliver roller 5 that is rotatably mounted near the center of the sliver carriage 7, is pulled out from above the sliver roller 5, and is pulled out from above the sliver roller 5, and the sliver 23 is pulled out from the sliver roller 5,
The sliver 23 passed between the top roller 4 and the sliver feed roller 3 is drafted and twisted when the spindle carriage 1 moves outward, and when the sliver feed roller 3 stops moving inward of the spindle carriage 1. Sometimes it is wound onto a bobbin.

Further, the servo motor 28 starts rotating in response to a start signal transmitted from a controller (not shown) in synchronization with the start of outward movement of the spindle carriage 1 and the sliver carriage 7, and after starting, the servo motor 28 starts rotating at a non-uniform speed of the spindle carriage 1. The rotational speed of the servo motor 28 is determined based on the number of pulses transmitted from the first encoder 20 corresponding to the traveling speed of the spindle carriage 1 in order to increase or decrease the rotational speed of the sliver delivery roller 3 in accordance with the traveling speed of the spindle carriage 1. is proportionally controlled and the carriage draft rate between the sliver feed roller 3 and the spindle 2 is set. A second encoder 29 is incorporated into the servo motor 28 to detect the cumulative number of revolutions of the servo motor 28 since the start of rotation and to transmit a pulse signal corresponding to the cumulative number of revolutions of the sliver feed roller 3. , when the number of pulses transmitted by the second encoder 29 matches the cumulative rotation value of the sliver feed roller 3, which is preset based on the draft magnification by a digital sliver draft setting device (not shown) provided on the operation console 25. The rotation of the servo motor 8 is stopped, and the rotation of the sliver feed-out roller 3 is stopped during the outward movement of the spindle carriage 1 and the sliver carriage 7, and the rotation stop position of the sliver feed-out roller 3 is determined by the second encoder 29. spindle 2
, the spindle draft rate between the stopped sliver feed-out rollers 3 is set. Further, the servo motor 28 is continuously stopped until both carriages 1 and 7 travel to the outer end, then turn around and travel inward, and return to the inner end, and is activated again by the activation signal.

The servo motor 28 is set to start rotating slightly earlier than the start of outward movement of both carriages 1 and 7 in order to prevent excessive tension on the spun yarn at the start of drafting.

Next, the operation and effects of the embodiment having the above configuration will be explained.

Now, in this example, the servo motor 28 provided for rotationally driving the sliver feed roller 3 is connected to the spindle carriage 1 and the sliver carriage 7.
The rotational speed of the servo motor 28 is started in synchronization with the start of outward movement of the spindle carriage 1, and the rotational speed of the servo motor 28 is controlled based on the speed signal of the first encoder 20 provided to detect the outward movement speed of the spindle carriage 1. Proportional control is performed in accordance with the advancing speed, and furthermore, it is preset based on the draft magnification and the number of pulses transmitted by the second encoder 29 incorporated in the servo motor 28 to detect the cumulative rotation speed of the servo motor 28. When the cumulative rotation value of the sliver feed roller 3 matches the rotation value of the sliver feed roller 3, the rotation of the servo motor 28 is stopped and the rotation of the sliver feed roller 3 is transferred to the spindle carriage 1 and the sliver carriage 7.
The structure is such that the vehicle is stopped while the vehicle is moving outward.

Therefore, a gear system for transmitting rotation to the sliver delivery roller 3, a mechanism for setting the draft magnification by changing the rotation speed of the sliver delivery roller 3, and a clutch mechanism accompanying these are all unnecessary. , the drive mechanism for the sliver feed roller 3 can be significantly simplified, and
By controlling the rotation of the servo motor 28, the rotation speed, draft magnification, and rotation stop position of the sliver delivery roller 3 can be easily and accurately set, and operations for setting the spinning conditions can be performed. This has the effect of significantly simplifying the process.

(Effects of the Invention) That is, the present invention starts the servo motor provided for rotationally driving the sliver delivery roller in synchronization with the start of outward movement of the spindle carriage, and detects the outward movement speed of the spindle carriage. The rotational speed of the servo motor is proportionally controlled based on the speed signal of a first detection device provided to detect the integrated rotation speed of the servo motor, and the signal is transmitted from a second detection device provided to detect the cumulative rotation speed of the servo motor. When the number of pulses matches the cumulative rotation value of the sliver delivery roller, which is preset based on the draft magnification, the rotation of the servo motor is stopped, and the rotation of the sliver delivery roller is stopped outside the spindle carriage. By configuring the sliver to be stopped during the progress, the sliver delivery roller drive mechanism can be significantly simplified, and the operation for setting the spinning conditions can be extremely simplified.

[Brief explanation of the drawing]

The drawings show one embodiment of the apparatus used in the present invention, and FIG. 1 is a side view of a Muille spinning machine, and FIG.
The figure is a plan view of the main parts, and FIG. 3 is a schematic plan view of the whole. 1...Spindle carriage, 3...Sliver sending roller, 20...First encoder, 28
... Servo motor, 29 ... Second encoder.

Claims (1)

[Claims] 1. A first detection device provided to start a servo motor provided to rotationally drive a sliver delivery roller in synchronization with the start of outward movement of the spindle carriage, and to detect the outward movement speed of the spindle carriage. proportionally controlling the rotational speed of the servo motor based on the speed signal of the servo motor, and
the number of pulses transmitted from a second detection device provided for detecting the cumulative rotation speed of the servo motor;
Stopping the rotation of the servo motor when the cumulative rotation value of the sliver feed roller that is preset based on a draft magnification matches, and stopping the rotation of the sliver feed roller while the spindle carriage is moving outward. 1. A method for controlling the drive of a sliver feed roller in a Muille spinning machine.