JP3139147B2 - Bobbin rail lift control method for roving 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 method for controlling the elevation of a bobbin rail in a roving machine, and more particularly, to the elevation control of a bobbin rail in a roving machine for winding a roving yarn so as to have a proper roving angle. It is about the method.

[0002]

2. Description of the Related Art In general, in a roving machine, a roving yarn fed at a constant speed from a front roller is twisted into a roving yarn by a rotation speed difference between a flyer rotating at a predetermined speed and a bobbin rotating at a higher speed. Wrap on a bobbin while hanging. The bobbin is supported by the bobbin rail and is moved up and down together with the bobbin rail. Is wound up.

In order to increase the roving amount per roving winding, it is necessary to increase the shoulder angle θ of the roving winding F shown in FIG. However, there is an upper limit value for the shoulder angle θ of the roving winding F that can be formed without causing shoulder collapse depending on the spinning conditions such as the weight of the spun roving yarn and the fiber type. And, with carded cotton and combed cotton, combed cotton is more likely to cause shoulder collapse,
In addition, the thinner the yarn, the more easily the shoulder collapse occurs. Therefore, conventionally, when spinning conditions are determined during operation of a roving machine, an operator estimates an appropriate shoulder angle θ according to the spun roving weight and fiber type in the spinning conditions, and realizes the shoulder angle θ. Work had to be done. That is, the lifting of the bobbin rail drive system,
In the roving machine in which the switching timing of the downward drive can be arbitrarily switched by a command from the control device and the switching timing is calculated by setting the shoulder angle, the shoulder angle is set and input. Further, in the case of a roving machine of a type in which the shoulder angle is changed by exchanging a change gear, an exchange operation with a change gear having the shoulder angle is performed.

[0004]

Conventionally, every time the weight or fiber type of the spun roving is changed by changing the spinning conditions,
The operator must find an appropriate shoulder angle corresponding to the angle, and perform work to realize the angle, which is troublesome.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to adjust a shoulder angle corresponding to a change in spun roving weight or fiber type due to a change in spinning conditions. An object of the present invention is to provide a bobbin rail lifting / lowering control method in a roving machine in which a roving yarn is automatically wound at an appropriate shoulder angle corresponding to a change in spinning conditions without the need for an operator.

[0006]

According to the present invention, in order to achieve the above object, at least a roving machine capable of arbitrarily switching a switching timing of a lifting and lowering drive of a bobbin rail raising / lowering drive system by a command from a control device is provided. Spun roving weight and
Controls a database that calculates the shoulder angle of the roving from the fiber type
Devices is stored, selects a shoulder angle proper coarse winding corresponding to spun roving weight and fiber type entered by the input device from the de <br/> database, the upper and lower bobbin rail during spinning operation The lifting and lowering of the bobbin rail is performed so that the shoulder angle becomes the selected shoulder angle based on a signal from the detecting means for detecting the position in the direction.

[0007]

When the spinning conditions are input, the control device determines the appropriate roving angle of the roving winding corresponding to the roving weight and fiber type.
Is selected from the database is determined. During the spinning operation, the vertical position of the bobbin rail is determined based on a signal from the detecting means, and the moving direction of the bobbin rail is changed at the vertical switching position for realizing the determined roving winding shoulder angle. The switching of the ascending and descending directions is performed as described above.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The drive system of the roving machine is basically the same as that previously proposed by the applicant of the present invention (JP-A-63-264923), but the mechanism for switching the bobbin rail up and down is different. The drive system includes a spinning drive system, a winding drive system, and a lifting drive system, and each drive system has a different variable speed motor. As shown in FIG. 2, the front roller 1 is rotated via a gear train (both not shown) disposed between one end of the rotating shaft 1a and a driving shaft which is driven to rotate by the main motor M. It is designed to be driven. The driven gear 3 is located above the flyer 2.
Are rotatably fitted together so as to be integrally rotatable, and are rotationally driven via a drive gear 5 fitted to the rotating shaft 4 by the rotation of the rotating shaft 4 to which the rotation of the driving shaft is transmitted via a belt transmission mechanism. . On the other hand, a driven gear 7a is fixed to a spindle 7 mounted on the bobbin rail 6.
A rotating shaft 9 to which a driving gear 8 meshed with the driven gear 7a is fitted and fixed is connected to a rotating force of a driving shaft and a winding motor 11 which is driven at a variable speed via an inverter 10b.
And the torque generated by the differential gear mechanism 12 are transmitted. A take-up speed transmission device configured to reduce the bobbin rotation speed in response to the increase in the roving winding layer by the take-up motor 11, the differential gear mechanism 12, and the like.

A lifter rack 13 is fixed to the bobbin rail 6. Gear 1 meshing with lifter rack 13
The rotation of a drive shaft 17 driven by a lifting / lowering motor 16 driven by a speed change via an inverter 10c is transmitted to the rotation shaft 15 on which the 4 is fitted via a switching mechanism 18 and a gear train. The switching mechanism 18 includes an intermediate shaft 19 and the intermediate shaft 19.
And a pair of gear trains 2 provided between
0 and 21 and electromagnetic clutches 22 and 23 for transmitting the rotation of the gear trains 20 and 21 to the intermediate shaft 19.
The direction of rotation of the rotating shaft 15, that is, the direction of the vertical movement of the bobbin rail 6, is changed by the excitation and demagnetization of the electromagnetic clutches 22 and 23. One end of the rotating shaft 15 is connected to a rotary encoder 24 as a sensor for detecting the position of the bobbin rail 6 in the up-down direction and the elevating speed.

Next, a control circuit for controlling the driving of the driving system will be described with reference to FIG. The microcomputer 26 constituting the control device 25 is inputted by a central processing unit (hereinafter referred to as a CPU) 27 as a control means, a program memory 28 composed of a read only memory (ROM) storing a control program, and an input device 29. And a work memory 30 comprising a readable and rewritable memory (RAM) for temporarily storing the input data and the result of the arithmetic processing in the CPU 27. The CPU 27 operates based on the program data stored in the program memory 28. . Roving weight, fiber type, flyer rotation speed, twist number,
An input device 29 for inputting spinning conditions such as a bobbin diameter into the working memory 30 is incorporated in the control device 25 as a keyboard.

The CPU 27 includes an output interface 33, motor drive circuits 34a, 34b, 34c and an inverter 1
The main motor M, the winding motor 11 and the lifting / lowering motor 16 are driven and controlled via 0a, 10b and 10c. An output signal from the rotary encoder 24 is input to the CPU 27 via the input interface 31. The CPU 27 is a rotary encoder 24
The vertical speed and the position of the bobbin rail 6 are calculated on the basis of the output signal from the controller. The rotary encoder 24 outputs different pulse signals corresponding to the forward rotation and the reverse rotation of the rotating shaft 15, respectively, so that the discrimination between the rising and the falling of the bobbin rail 6 can be confirmed from the pulse signal. Has become. Also, the electromagnetic clutches 22 and 23
The excitation and demagnetization of the bobbin rail 6 are controlled based on a signal from the CPU 27 via an electromagnetic clutch excitation and demagnetization circuit 32, and the bobbin rail 6 is switched. The bobbin rail 6 moves up when one electromagnetic clutch 22 is excited, and moves down when the other electromagnetic clutch 23 is excited. Further, the two electromagnetic clutches 22 and 23 are not excited at the same time.

The program memory 28 has a database 3 as shown in FIG. 4 for obtaining the optimum roving winding shoulder angle θ from the spun roving weight [Geren / 30 yards] and the fiber type.
5 is stored. The fiber type means a difference between carded cotton, combed cotton, synthetic fiber and the like. This database is created based on the operating condition data accumulated as data and the data obtained experimentally.

Next, the operation of the device configured as described above will be described. Prior to the operation of the machine stand, first, the spinning conditions such as the weight of the spun roving yarn, the fiber type, the number of rotations of the flyer, and the number of twists are set in the input device 2.
9 is input. When the spinning conditions are input, the CPU 2
7 is a database 3 stored in the program memory 28
5, the optimum roving winding shoulder angle θ corresponding to the spun roving weight and fiber type is selected, and the roving winding shoulder angle θ during operation is set. For example, if the spun roving weight is 200 (Geren / 30 yards) and the fiber type is cotton combed yarn,
The shoulder angle θ of the roving is set to 34 °.

Thereafter, the operation of the machine frame is started, and the front roller 1 and the flyer 2 are driven to rotate by the main motor M, respectively. In addition, the winding motor 1
1 and the elevating motor 16 are also driven, and the differential gear mechanism 12
The rotational force of the main motor M input to the
Are combined by the differential gear mechanism 12, and the combined rotating force drives the rotating shaft 9 to rotate the spindle 7. As a result, the roving R drawn by the draft device is twisted by the flyer 2 and wound up in a layer on a bobbin B rotating at a higher speed than the flyer 2. In addition, the bobbin rail 6 is moved up and down together with the lifter rack 13 via the switching mechanism 18, the rotating shaft 15, and the like by the driving of the elevating motor 16. The winding speed and the elevating speed of the bobbin rail 6 are changed by changing the rotation speeds of the winding motor 11 and the elevating motor 16.

Next, the operation of the control device 25 for realizing the set shoulder angle θ will be described with reference to FIG. The shoulder angle θ of the roving winding is expressed by the following equation, as shown in FIG. 5, where Δx represents the amount of increase in the radius of the roving per layer and Δy represents the amount of decrease in the lift per layer.

Θ = tan ^-1 (Δx / Δy) The amount of increase in roving radius per layer Δx is uniquely determined from spinning conditions. The CPU 27 sets the optimum shoulder angle θ of the roving winding based on the spinning conditions and the database 35 (step S1).
After that, the amount of decrease Δy of the lift per layer is calculated so that the shoulder angle θ is obtained, and the vertical reversal position of the bobbin rail 6 is calculated (step S2). When a reversal command is output when the bobbin rail 6 reaches the vertical reversal position, that is, a switching command is output to the switching mechanism 18, the bobbin rail 6 reverses at a position beyond the predetermined reversal position because there is a response delay on the driven side. Therefore, the CPU 27 calculates the bobbin rail reversal instruction position, that is, the excitation / demagnetization switching instruction output position, in consideration of the response delay on the driven side (step S3).

Next, the CPU 27 controls the rotary encoder 24.
The position of the bobbin rail 6 is calculated based on the output signal from the controller (step S4), and it is determined whether the bobbin rail 6 has reached the bobbin rail reversal instruction position (step S4).
5). When the bobbin rail 6 reaches the bobbin rail reversal instruction position, the CPU 27 causes the electromagnetic clutches 22 and 2 to operate.
Then, an excitation / demagnetization switching command is output to the control unit 3 (step S6). The bobbin rail 6 is reversed at a predetermined reversal position in accordance with the switching between the excitation and demagnetization of the electromagnetic clutches 22 and 23. Then, the CPU 27 determines whether or not the bobbin rail 6 is inverted based on the output signal from the rotary encoder 24 (step S7). When the bobbin rail 6 is inverted, the process returns to step S2 again, and the above operation is repeated. Then, the roving is wound so as to have the shoulder angle θ of the roving set in accordance with the spinning conditions.

The present invention is not limited to the above-described embodiment. For example, as a method of setting the shoulder angle θ of the roving, the spinning speed is considered in addition to the weight and fiber type of the spun roving. A database may be employed. If the spinning speed is the same and the spinning roving weight and fiber type are determined, the maximum shoulder angle θ at which the shoulder collapse of the roving winding does not occur is determined. But,
If the spinning speed is significantly different, the optimum shoulder angle θ is different even if the spun roving weight and fiber type are the same. Therefore, when the spinning speed is largely changed, a database indicating the relationship between the weight of the spun yarn and the fiber type and the shoulder angle θ as shown in FIG. 4 is stored in the program memory 28 for each spinning speed. Is preferred. Also, instead of storing the database in the program memory 28, an equation using the shoulder angle θ as a variable of the spun roving weight and the fiber type is derived, and the equation is stored in the program memory 28.
And the shoulder angle θ may be calculated from the equation. Also, as a take-up speed transmission, Japanese Patent Laid-Open No. 62-1
As in the apparatus disclosed in Japanese Patent No. 17829, a configuration in which a cone drum is used and a gear system that drives a long rack that is linked to a belt shifter may be driven by a motor. Instead of detecting the position of the bobbin rail 6 on the basis of the output signal of the rotary encoder 24, that is, the amount of rotation of the rotary shaft 15, a number of permanent magnets are provided near the vertical range of the bobbin rail 6 with their N pole and S pole. Are arranged alternately, and the detection unit is fixed to the bobbin rail 6 so as to be integrally movable, and the detection signal of the detection unit is input to the control device 25 to detect the position of the bobbin rail 6. You may make it.

[0019]

As described above in detail, according to the present invention, when the operator inputs the spinning conditions, the optimum roving weight corresponding to the spinning roving weight and fiber type corresponding to the spinning conditions is obtained. The roving yarn is automatically wound so that the shoulder angle of the roving winding is adjusted. There is no need for an operator, and frequent changes in spinning conditions can be easily handled.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a procedure for instructing a vertical reversal of a bobbin rail.

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

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

FIG. 4 is a diagram showing a database stored in a program memory.

FIG. 5 is a partially broken schematic view showing a shoulder angle of a roving winding.

[Explanation of symbols]

6: bobbin rail, 16: elevating motor, 25: control device, 27: CPU, 28: program memory, 29: input device, 30: working memory, θ: shoulder angle.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-2-242925 (JP, A) JP-A-3-40820 (JP, A) JP-A-48-48734 (JP, A) JP-A-63-1988 264923 (JP, A) JP-A-1-229823 (JP, A) Japanese Patent Publication No. Sho 50-31210 (JP, B1) Japanese Utility Model Application No. 1-77819 (Japanese Utility Model Application Laid-Open No. 3-18174) Microfilm (JP, U) photographing the contents of documents and drawings (58) Fields surveyed (Int. Cl. ⁷ , DB name) D01H 1/36

Claims (1)

(57) [Claims] 1. A lifting and lowering drive of a bobbin rail lifting drive system.
The timing of switching the motion can be arbitrarily switched by a command from the control unit.
Possible roving machines,The shoulder angle of the roving winding from at least the spun roving weight and fiber type
Is stored in the control device, Entering Roving weight entered by the force deviceas well asFor fiber type
The appropriate roving winding shoulder angleSaidSelect from database
Select  Detects the vertical position of the bobbin rail during spinning operation
The selected shoulder angle based on the signal from the detection means;
Switch the bobbin rail up and downRoughSpinning machine
Bobbin rail lift control method.