JPH05321045A - Roving machine - Google Patents

Abstract

PURPOSE:To properly vary the rotational speed of a bobbin corresponding to the spinning condition for each increase of the number of wound roving layers by automatically calculating the decrease of the rotational speed of the bobbin by the increase in the roving layers corresponding to the spinning condition. CONSTITUTION:A program memory 28 stores a data base to calculate the decrease in the rotational speed of a bobbin for the increase in the number of wound roving layers as a function of variables such as the weight of roving, the kind of fiber, the rotational speed of a flyer and the wound number of a presser. The decrease in the rotational speed corresponding to the increase in the number of the wound roving layers is calculated by a CPU 27 based on the spinning conditions inputted by an inputting apparatus 29 and the data base stored in the program memory 28. The winding motor 11 is decelerated by a control signal transmitted from the CPU 27 corresponding to the increase in the number of roving layers and the rotational speed of the bobbin is decreased by a prescribed decrement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roving machine equipped with a winding speed transmission which reduces the bobbin rotation speed in response to an increase in the roving winding layer on the bobbin.

[0002]

2. Description of the Related Art In a bobbin reed type roving machine, a roving yarn fed from a front roller at a constant speed is produced by a difference in rotational speed between a flyer rotating at a predetermined speed and a bobbin rotating at a higher speed. Wind it on a bobbin while twisting it. The bobbin is supported by the bobbin rail and is moved up and down together with the bobbin rail, and the travel distance of the bobbin rail is shortened each time the direction of the bobbin rail lifting movement changes.
The roving is wound so that both ends of the roving are wound into a conical shape.

[0003] If winding is not performed so that the amount of roving yarn delivered and the amount of roving yarn are approximately the same during winding, normal winding will not be performed, and yarn unevenness and roving breakage due to fluctuations in tension of the roving yarn will occur. Occurs. Therefore, conventionally, a transmission using a pair of cone drums and a belt shifter controls the rotation speed of the bobbin so that it gradually decreases as the roving layer wound around the bobbin increases. However, since the ratio of the increase in the roving winding diameter to the number of roving layers wound on the bobbin changes depending on the spinning conditions, the shape of the cone drum should be changed (the cone drum should be replaced) according to the spinning conditions. It is necessary to change the moving amount of the belt shifter in accordance with the spinning condition by using an auxiliary cam (Japanese Patent Publication No. 52-48652), and the above-mentioned troublesome replacement or adjustment is required every time the spinning condition is changed. Work was needed. Further, a gear system for driving a long rack that is interlocked with the belt shifter is driven by a motor, and the motor is driven and controlled so that the belt shifter has a movement amount corresponding to the number of winding layers input to the microcomputer. Has also been proposed (Japanese Patent Laid-Open No. 62-117829).

In recent years, there is a strong demand for high-mix low-volume production, and in order to cope with frequent changes in spinning conditions, the spinning drive system and the winding drive system are driven by different variable speed motors, respectively. There has been proposed a roving machine in which each variable speed motor is drive-controlled based on data inputted in advance into a storage device in accordance with spinning conditions (for example, Japanese Patent Laid-Open No. 6-58242).
3-264923).

[0005]

In the apparatus constructed so that the movement amount of the belt shifter can be adjusted, it is not necessary to replace the cone drum with a change in the spinning conditions, but the bobbin corresponding to the increase in the roving winding layer is required. In order to make the amount of decrease in the rotation speed an appropriate value, it is necessary to set an appropriate amount of movement of the belt shifter along with a change in spinning conditions. Further, even in a device in which the spinning drive system and the winding drive system are driven by different variable speed motors, respectively, the bobbin rotation speed can be appropriately adjusted to cope with an increase in the roving winding layer as the spinning conditions are changed. It is necessary to set a large reduction amount. In order to set an appropriate amount of movement of the belt shifter or an appropriate amount of decrease of the bobbin rotation speed, it is possible to use it if there is data from past spinning under the same spinning conditions, but in other cases. It can only be estimated based on the past experience and intuition of the worker. However, this estimated value is not always an appropriate value, so trial spinning is necessary.
Then, depending on the spinning conditions, it is often the case that a plurality of trial spinnings are required until the estimated value approaches the appropriate value. as a result,
There are problems that the raw materials and labor are wasted by the trial spinning and the operating efficiency of the roving frame is reduced. Then, the spinning condition is frequently changed in response to the production of a wide variety of products in a small lot, so that the above problem becomes more remarkable.

The present invention has been made in view of the above problems, and an object thereof is to allow a worker to input a spinning condition so that a bobbin rotation speed corresponding to an increase in the roving winding layer corresponding to the spinning condition. The purpose of the present invention is to provide a roving machine in which the amount of decrease of the bobbin is automatically calculated and the bobbin rotation speed is appropriately changed according to the spinning conditions.

[0007]

In order to achieve the above object, the present invention provides a coarse spinning machine equipped with a winding speed transmission which reduces the bobbin rotation speed in response to an increase in the roving winding layer with respect to the bobbin. A storage unit that stores a database for determining the decrease amount of the bobbin rotation speed with respect to the increase of the bobbin layer as at least variables such as roving weight, fiber type, flyer rotation number, presser winding number, and roving weight, fiber type, flyer Based on the input means for inputting the spinning conditions such as the number of rotations and the number of presser windings, and the spinning condition under the spinning conditions based on the spinning conditions input by the input means and the database stored in the storage device. And a control means for calculating a decrease amount of the bobbin rotation speed with respect to an increase in the number of layers and outputting a control signal for realizing the bobbin rotation speed to the winding speed transmission.

In addition to the above configuration, in the invention according to claim 2, after the spinning operation in an appropriate winding state, the spinning condition in the spinning operation and the bobbin rotation with respect to the increase of the roving winding layer are increased. A renormalization means for reconciling the relationship with the speed decrease amount as the derivation data of the database is provided.

[0009]

According to the present invention, the bobbin rotation speed is changed based on the bobbin rotation speed shift pattern set in advance every time the winding roving layer is increased, and the bobbin rotation speed is controlled so that the roving tension is in an appropriate state. To be done. When the spinning conditions such as the roving weight, the fiber type, the number of flyer revolutions, and the number of presser wraps are input by the input device, the spinning conditions are input based on the input spinning conditions and the database stored in the storage device. The control means calculates the amount of decrease in the bobbin rotation speed with respect to the increase in the roving winding layer under the conditions. A control signal is output from the control means to the winding speed transmission so as to rotate the bobbin at the bobbin rotation speed. Then, the winding speed transmission is operated according to the control signal, and the rotation speed of the bobbin is appropriately changed each time the winding roving layer increases.

Further, in the invention described in claim 2, after the spinning operation in a proper winding state, the relationship between the spinning condition in the spinning operation and the decrease amount of the bobbin rotation speed with respect to the increase of the roving wound layer. , Are brought into the database as data for deriving by the feeding means.

[0011]

【Example】

(Embodiment 1) An 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 proposed by the applicant of the present application (Japanese Patent Laid-Open No. 63-264923), but the bobbin rail up / down switching mechanism is different. The front roller 1 is rotatably driven via a gear train arranged between one end of the rotary shaft 1a and a driving shaft rotatably driven by the main motor M. A driven gear 3 is integrally rotatably fitted and fixed to an upper portion of the flyer 2, and the rotation of the rotary shaft 4 is transmitted through a belt transmission mechanism to the rotation of the driving shaft. It is rotationally driven via the gear 5. On the other hand, a driven gear 7a is fixed to a spindle 7 mounted on the bobbin rail 6. A rotary shaft 9 to which a drive gear 8 meshing with the driven gear 7a is fitted and fixed, and a rotary force of a driving shaft,
The rotational force of the winding motor 11 that is speed-changed via the inverter 10b is combined and transmitted by the differential gear mechanism 12. The winding motor 11, the differential gear mechanism 12, and the like constitute a winding speed transmission that reduces the bobbin rotation speed in response to an increase in the roving winding layer.

A lifter rack 13 is fixed to the bobbin rail 6. Gear 1 meshing with lifter rack 13
The rotation of the drive shaft 17, which is driven by the lifting motor 16 that is variable-speed driven via the inverter 10c, is transmitted to the rotary shaft 15 to which 4 is fitted via the switching mechanism 18 and the 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 the drive shaft 17 and
0, 21 and electromagnetic clutches 22, 23 for transmitting the rotation of the gear train 20, 21 to the intermediate shaft 19.
The rotation direction of the rotary shaft 15, that is, the direction in which the bobbin rail 6 moves up and down is changed by the demagnetization of the electromagnetic clutches 22 and 23. A rotary encoder 24 is connected to the end of the rotary shaft 15 as a sensor for detecting the vertical movement direction of the bobbin rail 6.

Next, a control circuit for driving and controlling the drive system will be described with reference to FIG. A microcomputer 26 constituting the control device 25 is inputted by a central processing unit (hereinafter referred to as CPU) 27 as control means, a program memory 28 including a read-only memory (ROM) storing a control program, and an input device 29. The input memory and the working memory 30 as a storage means composed of a readable and rewritable memory (RAM) for temporarily storing the arithmetic processing result in the CPU 27 and the like.
7 operates based on the program data stored in the program memory 28.

An input device 29 as an input means for inputting spinning conditions such as roving weight, fiber type, flyer rotation number, presser winding number, etc. is integrally incorporated in the control device 25 as a keyboard. The output signal from the rotary encoder 24 is input to the CPU 27 via the input interface 31. In addition, the electromagnetic clutch 22,
23, the excitation / demagnetization of the bobbin rail 14 is controlled based on a signal from the CPU 27 via the electromagnetic clutch excitation / demagnetization circuit 32 to switch the bobbin rail 14 up and down. or,
The CPU 27 includes an output interface 33, motor drive circuits 34a, 34b, 34c and inverters 10a, 10
The main motor M, the winding motor 11 and the lifting motor 16 are drive-controlled via b and 10c.

In the program memory 28, the decrease amount of the bobbin rotation speed with respect to the increase of the roving winding layer, the roving weight (gel) g, the fiber type m, the flyer rotation speed NF, the presser winding number n, and the flyer type t are variables. The database required as is stored. The fiber type means the difference between card-treated cotton, combed cotton, synthetic fiber, etc., and the difference in flyer type also includes the difference in presser pressure. This database is created by classifying and organizing the operating condition data that has been accumulated as data, and using a statistical processing method etc. for each classified sample group, the decrease amount Δ of the bobbin rotation speed with respect to the increase of the roving wound layer Δ And a relational expression between the weight g of roving used and g. The equation Δ = F (g) is stored in the program memory 28 as a database.

For example, as shown in FIG. 3, fiber type m, flyer rotation speed NF, presser winding number n, flyer type t
With respect to the data under the same condition as above, the decrease amount Δ of the bobbin rotation speed with respect to the increase of the roving winding layer and the used roving weight g are plotted on the coordinates as variables, and the relational expression is obtained. While the fiber type m, the flyer rotation speed NF, the presser winding number n, and the flyer type t are present as discrete data, the roving weight g used is variously changed depending on the spinning conditions. Therefore, in the case of spinning using a roving of a used roving weight g that does not correspond to the mark, only the data indicated by circles, crosses, etc. in FIG. It is necessary to set Δ. However, the database stores the relationship between the decrease amount Δ of the bobbin rotation speed with respect to the increase of the roving winding layer and the roving weight weight g used for each sample group as a continuous function obtained from those data. In the figure, m: cotton (carded), n: 3 times, t: A type, NF: 1000 to 1200 rpm, m: cotton (combed), n: 4 times, t: B type, NF: 800 to 100
0 rpm, m: synthetic fiber, n: 4 times, t: B type, NF: 1
Illustrated for three sample populations at 000-1200 rpm.

Next, the operation of the apparatus configured as described above will be described. Prior to the operation of the machine stand, spinning conditions such as a roving weight (gel) g, a fiber type m, a flyer rotation speed NF, a presser winding number n, and a flyer type t are inputted by an input device 29. When the spinning condition is input, the CPU 27 sets the decrease amount Δ of the bobbin rotation speed with respect to the increase of the roving winding layer under the spinning condition, based on the database stored in the program memory 28.

Thereafter, the operation of the machine base is started, and the front roller 1 and the flyer 2 are rotationally driven by the main motor M, respectively. Also, at the same time when the machine base is started up, the winding motor 1
1 and the lifting motor 16 are also driven to drive the differential gear mechanism 12
Of the main motor M input to the winding motor 11 and the winding motor 11
Is combined with the rotating force of the differential gear mechanism 12, and the combined rotating force drives the rotating shaft 9 to rotate the spindle 7. Thus, the roving R drawn by the draft device is twisted by the flyer 2 and wound in layers on the bobbin B rotating at a higher speed than the flyer 2. Further, 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 driving the lifting motor 16. The winding speed and the lifting speed of the bobbin rail 6 are changed by changing the rotation speeds of the winding motor 11 and the lifting motor 16.

The CPU 27 inputs the output signal from the rotary encoder 24 and calculates the position of the bobbin rail 6,
An excitation / demagnetization switching signal is output to the electromagnetic clutches 22 and 23 so that the roving winding shape (coarse winding shoulder angle) corresponds to the spinning conditions. The bobbin rail 6 moves up and down within a predetermined range as the electromagnetic clutches 22 and 23 are demagnetized.

Further, the CPU 27 is a rotary encoder 24.
An up / down switching of the bobbin rail 6 is detected by an output signal from the bobbin rail 6, and every time the winding roving layer increases by one layer, the bobbin rotation speed is reduced by the decrease amount Δ by the inverter 10b. 11 is driven and controlled. Then, the rotation speed of the bobbin B is decelerated by an appropriate decrease amount Δ each time the winding roving layer increases by one layer. Further, the speed of the lifting motor 16 is also controlled to be decelerated corresponding to the speed of the winding motor 11, and the moving speed of the bobbin rail 6 is reduced in synchronization with the winding speed.

(Embodiment 2) Next, another embodiment will be described.
In the above embodiment, the database for setting the decrease amount of the bobbin rotation speed with respect to the increase of the roving wound layer is limited to the one stored in advance in the program memory 28, but the database can be revised in this embodiment. This point is different from the above embodiment.

That is, in this embodiment, in addition to the program for deriving the relationship between the reduction amount Δ serving as a database and the roving weight (gel) g in the program memory 28, the roving weight (gel) g, Data indicating the relationship among the fiber type m, the flyer rotation speed NF, the presser winding number n, the flyer type t, and the decrease amount of the bobbin rotation speed with respect to the increase in the roving winding layer is stored. Further, the work memory 30 can store data indicating the relationship between the new spinning condition and the reduction amount Δ. In this embodiment, the working memory 30
, Which constitutes the renormalization means for reconciling the relationship between the new spinning condition and the decrease amount Δ as the data for deriving the database. The CPU 27 derives a database from the program and data stored in the program memory 28 and, if the derivation data is stored in the work memory 30, the database and complies with the spinning conditions based on the database. The decrease amount Δ of the bobbin rotation speed with respect to the increase of the roving winding layer is calculated.

If the spinning is temporarily performed with the reduction amount Δ calculated from the database and the reduction amount is insufficient during the actual spinning operation and the operator adjusts the tension, the tension adjustment is performed. The reduction amount Δ in the actual proper spinning operation after the spinning and the spinning conditions at that time are stored in the work memory 30 as the data for deriving a new database. And CPU2
7 is a bobbin for deriving a database again based on the data stored in the program memory 28 and the new data stored in the work memory 30, and for increasing the number of roving wound layers corresponding to the spinning conditions based on the database. The decrease amount Δ of the rotation speed is calculated.

That is, in this embodiment, as data for determining a curve serving as a database, new data is sequentially added in addition to the data previously stored in the program memory 28. Therefore, as shown in FIG. 4, when the curve representing the relational expression serving as the database is determined, new data represented by the chain line is added in addition to the base data represented by the solid line, so that the reliability of the curve serving as the database is improved.

The present invention is not limited to the above-mentioned embodiment. For example, as a database for calculating the decrease amount Δ of the bobbin rotation speed with respect to the increase of the roving winding layer, the decrease amount Δ is represented by the roving weight ( It may be a function represented by variables of both the gelen) g and the flyer rotation speed NF. or,
As in the device disclosed in Japanese Unexamined Patent Publication (Kokai) No. 62-117829, a winding speed transmission is configured such that a cone drum is used and a gear system for driving a long rack interlocking with a belt shifter is driven by a motor. The long rack feed amount may be used as the reduction amount Δ of the bobbin rotation speed with respect to the increase of layers. Also, as the drive system of the roving frame,
All the drive systems may be independently driven by motors without providing the differential gear mechanism 12.

[0026]

As described above in detail, according to the present invention, when the operator inputs the spinning conditions, the decrease amount of the bobbin rotation speed corresponding to the increase of the roving winding layer corresponding to the spinning conditions is automatically determined. Therefore, the experience and intuition required by the worker in the past are unnecessary. Further, it is possible to reduce the labor, time, waste of raw materials and the like required for the trial spinning for setting the appropriate amount of decrease in the bobbin rotation speed with respect to the increase in the roving wound layer corresponding to the spinning conditions.

According to the second aspect of the invention, in addition to the above effects, the bobbin rotation speed data in the proper tension state obtained at the previous winding operation is utilized at the next winding operation, and the database is obtained. Improves reliability.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a drive system of a roving frame.

FIG. 2 is a block diagram showing an electrical configuration of a control device.

FIG. 3 is a diagram showing a relationship between a reduction amount of a bobbin rotation speed with respect to an increase in a roving winding layer, a roving weight, a fiber type, a flyer rotation speed, a presser winding number, and the like.

FIG. 4 is a diagram showing a relationship between a decrease amount of a bobbin rotation speed with respect to an increase in a roving winding layer and a roving weight, a fiber type, a flyer rotation speed, a presser winding speed, and the like in a second embodiment.

[Explanation of symbols]

27 ... CPU as control means, 28 ... Program memory as storage means, 29 ... Input device as input means, 30 ... Working memory constituting retraction means.

Claims (2)

[Claims] 1. A roving machine equipped with a winding speed transmission that reduces the bobbin rotation speed in response to an increase in the roving winding layer relative to the bobbin, wherein the reduction amount of the bobbin rotation speed relative to the increase in the roving winding layer is at least Storage means that stores a database for variables such as yarn weight, fiber type, flyer rotation speed, presser winding number, and spinning conditions such as roving weight, fiber type, flyer rotation speed, presser winding number, etc. Input means, based on the spinning conditions input by the input means and the database stored in the storage device, calculate the decrease amount of the bobbin rotation speed with respect to the increase of the roving winding layer under the spinning conditions, And a control means for outputting a control signal for realizing the bobbin rotation speed to the winding speed transmission. 2. A roving machine equipped with a winding speed transmission that reduces the bobbin rotation speed in response to an increase in the roving winding layer relative to the bobbin, wherein the amount of decrease in the bobbin rotation speed with respect to the increase in the roving winding layer is at least Storage means that stores a database for variables such as yarn weight, fiber type, flyer rotation speed, presser winding number, and spinning conditions such as roving weight, fiber type, flyer rotation speed, presser winding number, etc. Input means, based on the spinning conditions input by the input means and the database stored in the storage device, calculate the decrease amount of the bobbin rotation speed with respect to the increase of the roving winding layer under the spinning conditions, Control means for outputting a control signal for realizing the bobbin rotation speed to the winding speed transmission, and spinning conditions in the appropriate spinning state after spinning operation in an appropriate winding state. Rover with a renormalization means the relationship between the decrease amount of the bobbin rotational speed, convolving the derived data of the database with respect to the increase in the coarse wound layer.