JPH0350129Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention relates to a winding machine for spinning, and is used where the fineness of the fiber is directly determined by the winding speed of the winding machine. .

(Problems to be solved by conventional technology and invention) Conventionally, this type of winding machine has a large diameter mandrel because the take-up speed of the winding machine is determined by the circumferential speed of the mandrel of the winding machine. Although it has been devised to avoid as much as possible the increase in yarn take-up circumferential speed due to the increase in the yarn layer due to winding, the increase in the yarn layer to be wound still affects the yarn fineness and the amount of yarn to be wound. There were significant restrictions, which hindered the rationalization of production.

The present invention aims to eliminate the drawbacks of conventional machines of this type, maintain yarn fineness, and increase the amount of winding. Focusing on the fact that the yarn increases in proportion to the number of traverses, the rotational speed of the winding mandrel is decelerated every certain number of traverses to keep the yarn take-up speed constant, thereby maintaining the desired yarn fineness and winding. This is intended to increase the amount taken.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a spinning winder that performs traversing according to the rotation of a mandrel driven by an electric motor and winds yarn on the mandrel. , a detector that generates a pulse signal according to the traverse, a frequency divider that divides the frequency of the pulse signal output from the detector, and a plurality of movable contacts each time the pulse signal output from the frequency divider is input. a stepping relay that is sequentially switched and connected to the fixed contacts of the
a plurality of speed setters respectively connected to the plurality of fixed contacts; and a motor speed control device connected to any one of the plurality of speed setters via a movable contact of the stepping relay. , the frequency divider can arbitrarily change the frequency division ratio, and the plurality of speed setters are configured to adjust the speed of the thread when the speed control device controls the motor to the rotational speed set by the speed setter. are each set at a value such that the take-up speed is maintained at a desired value during winding of the yarn.

(Example) An example of implementing the present invention will be described below in detail based on the drawings.

FIGS. 1A and 1B are diagrams showing an example of the implementation of the winding machine of the present invention.

A mandrel 3 supported by a spindle 2 from a machine frame 1 is driven by a variable speed electric motor 4.

On the other hand, a traverse cam 9 is connected to the spindle 2 via reduction gears 5, 6 and timing belt pulleys 7, 8 so as to rotate with the spindle 2 at a constant ratio.

A cam follower 11 attached to a traverse rod 12 is engaged with a cam groove 10 of the traverse cam 9.

A thread guide 13 is attached to the other end of the twill rod 12, and the twill rod 12 is attached to a guide groove 14 provided in the machine frame 1.
The winder is configured to traverse left and right along the winder, forming a spindle-driven precision winder.

At the other end of the shaft 15 of the traversing cam 9, the outer peripheral region is inserted into a detection slot 19 of a photosensor 18 to which a disc 16 having a notch 17 is fixed. The photo sensor 18 is configured to generate one pulse signal for each round trip.

FIG. 2 is a block diagram of a control device for the winding machine of FIG. 1. The pulses for each reciprocation of the yarn guide 13 emitted by a detection device 20 consisting of a disk 16 having a notch 17 and a photosensor 18 are reduced in number by an arbitrarily settable frequency divider 21.
A signal is sent to stepping relay 22.

Each contact (S ₁ , S _{2 .} . . S _o ) of a stepping relay (for example, Tateishi Electric, model G2F-24-B), which has Sn steps in one period, is a speed setting device consisting of Rn variable resistors. The speed setting device 23 is connected to a speed control device 24 by being sequentially switched for each output pulse from the frequency divider 21.

The speed control device 24 controls the rotational speed of the variable speed motor 4, such as an induction motor, by the output voltage corresponding to the resistance value of each speed setting device 23,
For example, it consists of a frequency converter. (For example, a transistor inverter made by Fuji Electric can be used as a frequency converter.
FRENIC5000G can be used. ) Next, the operation of the present invention will be explained.

Take-up yarn speed Vm/min, yarn fineness d denier, winding density ρg/cm ³ , number of winds (back and forth) W, empty mandrel diameter D ₁ cm, maximum winding diameter Dmcm, traverse width Tcm,
If the number of steps is Sn, the rotation speed N ₁ (rpm) of the mandrel at the beginning of winding is determined by N ₁ = v×10 ² /πD ₁ (assuming that W is relatively large and the effect of winding angle can be ignored). .

The number of steps Sn of the stepping relay determines the number of speed change steps until the mandrel yarn is _fully wound.
Sn is divided into equal parts, so the winding diameter D ₂ (cm) at the 2nd step shift point is D ₂ = D ₁ + (Dm - D ₁ )/Sn The winding diameter D ₃ (cm) at the 3rd step shift point is D ₃ = D ₁ + 2 (Dm-D ₁ )/Sn The winding diameter Dn (cm) at the n-th step shift point is expressed as Dn = D ₁ + (n-1) (Dm-D ₁ )/Sn. .

Accordingly, the speed setting device 23 can set the mandrel rotation speed N in order to keep the take-up yarn speed constant at each speed change point, and the mandrel rotation speed N ₂ ( rpm) is N ₂ = v x 10 ² / π {D ₁ + Dm - D ₁ /Sn} Mandrel rotation speed at the 3rd step shift point
N ₃ (rpm) is N ₃ = v x 10 ² / π {D ₁ + Dm - D ₁ /Sn} The number of rotations of the mandrel at the shift point of the nth step
Nn (rpm) should be set as Nn=v×10 ² /π {D ₁ + (n-1) (Dm-D ₁ )/Sn} with each speed setting device R ₁ , R ₂ ... R _o I can do it.

The frequency divider 21 is used to match the speed change point with the winding diameter at the speed change point depending on each condition, since the increase in the yarn layer size differs for each traverse depending on the yarn fineness and the number of winds. Number of setting values M of frequency generator 21
can be obtained as follows.

The total number of rotations n of the mandrel when the mandrel is fully wound is expressed as n=9×10 ⁵ ×π/4(Dm ² −D ₁ ² )Tρ/d /π{D ₁ +Dm−D ₁ /2} Therefore, the frequency divider setting number M can be set to the number M=n/W·Sn.

In addition, in the spinning process, the fineness of the yarn changes depending on the speed at which the yarn is taken up, so for example, if you want to reduce the fineness of the yarn, change the resistance value of the speed setting device (R ₁ and R _o ). Set the mandrel rotation speed at the beginning of winding and the mandrel rotation speed at the maximum winding diameter, respectively, and then set the resistance value of the speed setting device (R ₂ to _{R o-1} ) between these according to the mandrel rotation speed. Each is set to be inversely proportional to the increase in diameter, and the frequency division ratio of the frequency divider 21 is determined from the above equation. As a result, the yarn take-up speed, that is, the fineness of the spun yarn, is changed to a constant value, and the speed setting device (R ₁ ,
Since each winding amount (winding length) between the switching points of _R3 ... _Ro ) is changed, the thread of the desired fineness can be
This allows spinning while maintaining a constant fineness.

(Effects of the invention) As described above, according to the invention, a detector is provided that emits a pulse signal according to traversing, and the pulse signal of the detector is frequency-divided via an arbitrarily settable frequency divider. The stepping relay, which is activated by the output, switches the adjustable speed setting device of the electric motor that drives the mandrel to maintain the yarn take-up speed at a desired constant value, thereby reducing variations in yarn fineness. At the same time, it is possible to increase the amount of yarn to be wound, which has extremely effective effects in streamlining production and improving quality.

Furthermore, by simply changing the dividing ratio of the frequency divider and the setting values of each speed setting device, it is possible to easily match the take-up speed to the desired yarn fineness. This has the effect that yarns of different fineness can be spun.

[Brief explanation of the drawing]

1A and 1B show a front view and a side view of an embodiment of the present invention, and FIG. 2 shows a block diagram of a control device for a winding machine of the present invention. 3...Mandrel, 4...Variable speed electric motor, 9...
...Trailing cam, 12...Twilling rod, 13...Thread guide, 16...Disk, 17...Notch, 18...Photo sensor, 20...Detector, 21...Frequency divider, 2
2...Stepping relay, 23...Speed setter, 24...Speed control device.

Claims (1)

[Scope of utility model registration request] A spinning winder that performs traversing in response to the rotation of a mandrel driven by an electric motor and winds yarn on the mandrel includes a detector that generates a pulse signal in response to the traverse, and an output from the detector. A frequency divider that divides the frequency of a pulse signal; a stepping relay in which a movable contact is sequentially connected to a plurality of fixed contacts each time the pulse signal output from the frequency divider is input; comprising a plurality of connected speed setters and a motor speed control device connected to any one of the plurality of speed setters via a movable contact of the stepping relay,
The frequency divider can arbitrarily change the frequency division ratio, and the plurality of speed setters are configured to adjust the speed of the yarn when the speed control device controls the motor to the rotational speed set by the speed setter. 1. A winding machine for spinning yarn, characterized in that the take-up speed is set at a value such that a desired value is maintained during yarn winding.