JPH06294027A - Apparatus for displaying remaining spinning time of roving frame and method for displaying the time - Google Patents

Abstract

PURPOSE:To calculate and display the remaining spinning time to attain the full bobbin of a roving frame having successively varying flyer rotation speed. CONSTITUTION:A microcomputer 28 constituting a controller 27 is composed of a CPU 29, a program memory 30 and a working memory 32. The controller 27 is provided with an inputting apparatus 31, a counter 33 and a display 34. The counter 33 receives the output signal from a rotational number detection device 26 and counts the length of roving delivered from a front roller, i.e. the spun length of the roving. The CPU 29 calculates the remaining spinning time necessary to get a full bobbin from the count value of the counter 33 and the operation condition including the varying pattern of the rotational speed of a flyer inputted from the inputting apparatus 31, a full bobbin spun length and the twist number. The calculation result is displayed on the display 34.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a residual spinning time display device and a residual spinning time in a roving machine for forming a roving winding while changing the rotational speed of a flyer according to the length of the roving wound on a bobbin. It relates to a display method.

[0002]

2. Description of the Related Art In recent years, in order to improve the productivity of a roving spinning machine, there is a tendency for speeding up and large packaging. The centrifugal force that acts on the roving during winding increases with the diameter of the roving, that is, with the increase in the winding amount and the rotation speed of the flyer. It is necessary to suppress it so that it is below a certain value within the range that does not cause illegal drafts. Conventionally, as a method for operating a roving frame which satisfies this requirement, Japanese Patent Laid-Open No. 62-850
According to Japanese Patent No. 37, 37, a plurality of spun roving lengths l ₀ , l _1, l _2, ... L _n are selected from the start of winding to full filling as shown in FIG. 6, and flyers corresponding thereto are selected. Rotational speed N ₀ , N _1, N _2, ... N
By setting _n in advance and storing these values in the computer, while detecting the spun roving length, the flyer rotation speed between each set value is calculated by the interpolation method, and the corresponding signals are sequentially output. A method of controlling the rotation speed of a motor for driving a flyer is disclosed. When this method is carried out, generally 10 or more sets of the spun roving length l _i and the flyer rotation speed N _i are set.

Further, the applicant of the present application sets a desired average flyer rotation speed to automatically rotate the flyer from the start of winding to a full tube at a speed in which prevention of roving breakage due to centrifugal force is taken into consideration. A method of operating a roving frame capable of drive control has been proposed (Japanese Patent Laid-Open No. 4-352821).

[0004]

In the roving machine, the sliver supplied from the sliver can is spun as roving yarn. When the sliver can approaches the sky, the can is replaced with a full sliver can containing the sliver to be newly supplied. At this time, a sliver splicing work is performed to join the sliver being spun and the sliver to be newly supplied. The sliver splicing work must be performed with the roving machine stopped. And in order to increase the operating efficiency of the roving frame,
Sliver splicing work is often performed when the machine stand for doffing is stopped. Therefore, it is necessary to perform preparatory work such as disposing a full sliver can at a position corresponding to each can being spun by the time of doffing. Further, it is necessary to dispose a dolly for transporting the full bobbin that has been fried to the next step at a predetermined position before the start of fried. One of the workers who carries out these operations is in charge of a plurality of rovings, and it is necessary to complete the necessary preparatory work before stopping the doffing of each roving.

When the flyer rotation speed is constant during operation,
By knowing the spinning length or the diameter of the bobbin from the start of winding, the remaining spinning time until full filling can be easily known, and the preparatory work for doffing or sliver can replacement can be efficiently performed. However, it is difficult to grasp the remaining spinning time to full pipe with the operating method that changes the flyer rotation speed from winding start to full pipe one after another, even if the spinning length or bobbin diameter from the start of winding is known. . Since the conventional device does not have a function of displaying the remaining spinning time until the pipe is full, it is difficult to efficiently perform the preparatory work.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is, even when the flyer rotation speed is sequentially changed during operation, the residual spinning up to full pipe when necessary. It is an object of the present invention to provide a residual spinning time display device and a residual spinning time display method in a roving machine, which can know the spinning time.

[0007]

In order to achieve the above object, in the invention according to claim 1, the flyer rotation speed is changed in accordance with the length of the roving wound on the bobbin to form the roving. In the roving machine, the input device for inputting the operating conditions such as the flyer rotation speed shift pattern, the full tube spinning length, and the number of twists, the storage device for storing the operating conditions input by the input device, and the spinning length A counter for counting, a calculating means for calculating the remaining spinning time required to fill the pipe from the operating condition and the count value of the counter, and a display device for displaying the remaining spinning time calculated by the calculating means. Prepared

According to the second aspect of the invention, in the roving machine for forming the roving while rotating the flyer rotation speed according to the length of the roving wound on the bobbin, the flyer rotation speed shift pattern, The remaining spinning time required to fill the tube is sequentially calculated from the operating conditions including the full tube spinning length and the number of twists, and the count value of the counter that counts the spinning length, and the results are sequentially displayed on the display device. I did it.

[0009]

In the roving machine of the present invention, the roving spool is formed while the flyer rotation speed is changed according to the length of the roving wound on the bobbin. Prior to the operation, operating conditions such as a flyer rotational speed shift pattern, a full tube spinning length, and a twist number are input by an input device and stored in a storage device. The length of the roving sent out from the front roller, that is, the spinning length, is counted by the counter. From the operating conditions including the flyer rotation speed shift pattern, the full tube spinning length, the number of twists, and the count value of the counter, the remaining spinning time required for the full tube is calculated by the calculating means. The calculation result is displayed on the display device as the remaining spinning time. The calculation of the remaining spinning time is performed sequentially or when necessary.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment embodying the present invention will now be described with reference to FIGS.
It will be described with reference to FIG. The drive system of the roving machine is basically the same as that previously 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. As shown in FIG. 2, the front roller 1 is rotated via a gear train (none of which is shown) arranged between one end of the rotary shaft 1a and a driving shaft which is rotationally driven by the main motor M. It is designed to be driven. A driven gear 3 is fitted and fixed on the upper portion of the flyer 2 so as to be integrally rotatable. The rotary shaft 5 on which the drive gear 4 meshing with the driven gear 3 is fitted is connected to the driving shaft via a belt transmission mechanism (not shown), and the flyer 2 is rotated by the driving shaft.
It is rotationally driven via the drive gear 4 and the driven gear 3.

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.
The driving force of the driving shaft and the inverter 1
The rotational force generated by the winding motor 11 that is variable-speed driven via 0b is combined by the differential gear mechanism 12 and transmitted.

A lifter rack 13 is fixed to the bobbin rail 6. Gear 1 meshing with lifter rack 13
The rotation of the drive shaft 16 is transmitted to the rotary shaft 15 to which 4 is fitted via the switching mechanism 17 and the gear train. Drive shaft 16
Is driven by a lifting motor 18 that is variable-speed driven via an inverter 10c. The switching mechanism 17 is an intermediate shaft 19.
And a pair of gear trains 20 and 21 provided between the intermediate shaft 19 and the drive shaft 16, and electromagnetic clutches 22 and 23 that transmit the rotation of the gear trains 20 and 21 to the intermediate shaft 19. . Then, 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 exciting and demagnetizing the electromagnetic clutches 22 and 23. A rotary encoder 24 that detects the moving direction of the bobbin rail 6 is connected to the end of the rotary shaft 15. Further, a rotation speed detector 26 is arranged in the vicinity of the gear 25 that is fitted integrally with the rotating shaft 1a so as to be rotatable. The rotation speed detector 26 is a gear 25
A pulse signal is output with the rotation of.

Each of the motors M, 11 and 18 is a controller 2
The driving is controlled by 7. The microcomputer 28 constituting the control device 27 includes a central processing unit (hereinafter referred to as CPU) 29 as a calculation means for calculating the remaining spinning time,
Read-only memory (ROM) that stores the control program
And a rewritable and rewritable memory (R) for temporarily storing the input data input by the input device 31, the arithmetic processing result in the CPU 29, and the like.
AM) and a working memory 32 as a storage device. The CPU 97 operates based on the program data stored in the program memory 30.

An input device 31 for inputting operating conditions such as a flyer rotation speed shift pattern, a full tube spinning length, and a twisting number is integrally incorporated in the control device 27 as a keyboard.
The control device 27 is provided with a counter 33 which receives the output signal of the rotation speed detector 26 and counts the length of the roving yarn fed from the front roller, that is, the spinning length. Further, the control device 27 is integrally incorporated with a display device 34 for displaying the remaining spinning time required by the CPU 29 to fill the pipe. The CPU 29, the input device 31, the work memory 32, the counter 33, and the display device 34 constitute a remaining spinning time display device.

The output signal from the rotary encoder 24 is input to the CPU 29 via the input interface 35. The electromagnetic clutches 22 and 23 are C
Based on a signal from the PU 29, the excitation / demagnetization is controlled via the electromagnetic clutch excitation / demagnetization circuit 36, and the bobbin rail 6 is switched up and down. Also, the CPU 29
Is an output interface 37, motor drive circuits 38a, 3
The main motor M, the winding motor 11, and the lifting motor 18 are drive-controlled via 8b, 38c and the inverters 10a, 10b, 10c.

Next, the operation of the device configured as described above will be described. Prior to the operation of the machine base, operating conditions such as a flyer rotation speed shift pattern, a full-fiber spinning length, and the number of twists are input by the input device 31. As shown in FIG. 3, the input of the flyer rotation speed shift pattern divides the spinning length from the start of winding to the full pipe, that is, the full pipe spinning length R _0, into 10 equal parts, and each spinning length 0, R ₀ / 10,2R _0/10, ... 9R ₀
Flyer speed N at the time corresponding to / 10, R _0
0 , N _1, N _2, ... N ₁₀ are preset, and those values are input. These values are appropriately changed depending on the spinning count, fiber type, and the like.

After that, the operation of the roving frame is started, and the front roller 1 and the flyer 2 are rotationally driven by the main motor M, respectively. At the same time, the winding motor 11 and the lifting motor 18 are also driven, and the rotational force of the main motor M and the rotational force of the winding motor 11 input to the differential gear mechanism 12 are transferred by the differential gear mechanism 12. The rotating shaft 9 is driven by the combined rotating force and the spindle 7 is rotationally driven. Then, the roving R drawn by the draft device is twisted by the flyer 2 and wound on the bobbin B rotating at a higher speed than the flyer 2 in layers. Further, the bobbin rail 6 is moved up and down together with the lifter rack 13 via the switching mechanism 17, the rotary shaft 15 and the like by driving the lifting motor 18.

The output signal from the rotation speed detector 26 is input to the counter 33 as the machine base is driven. CPU 29
Calculates the spinning length based on the count value of the counter 33, and calculates the flyer rotational speed corresponding to the value from the input flyer rotational speed shift pattern. Then, the CPU 29 outputs the output interface 35 and the motor drive circuit 3 so that the rotation speed of the flyer corresponds to the spinning length.
The main motor M is drive-controlled via 8a and the inverter 10a. Further, the winding speed and the elevation speed of the bobbin rail 6 are changed by changing the rotation speeds of the winding motor 11 and the elevation motor 18.

The CPU 29 also indicates the remaining spinning time required for the full pipe from the flyer rotation speed shift pattern, the values of the full pipe spinning length and the twist number, and the count value of the counter 33, which are stored in the working memory 32. Calculate sequentially. Then, the calculation result is sequentially displayed on the display device 34 as the remaining spinning time. Therefore, the worker looks at the display of the display device 34,
The remaining spinning time of the roving machine can be easily confirmed, and the preparatory work for doffing can be efficiently performed.

Next, a method of calculating the remaining spinning time will be described. The spinning length R in the i-th section is expressed by the following equation. _{iR 0/10 ≦ R <(} i + 1) R 0/10 Also, during this period of flyer rotation speed N (R) is expressed by the following equation.

[0021] _{N (R) = N i +} {(N i + 1 -N i) / (R 0/10)} (R-iR 0/10) Then, the formula and the N (R) = ai R + bi Represented, ai
And bi are constants uniquely determined from the set values. or,
The spinning speed V (R) at this time is represented by the following equation, as is well known.

V (R) = (N (R) / T) × 25.4 [mm / min] where T is the number of twists per inch, and N (R) is the number of revolutions of the flyer [rpm]. Therefore, from the spinning length R to (i +
1) time tau ₁ required for spinning up R _0/10 is expressed by the following equation. However, in this case, the unit of the spinning length R is metric.

[0023]

[Equation 1]

The integrated value differs depending on whether or not ai is 0, that is, whether or not the flyer rotation speed N (R) in the section is constant. When the flyer rotation speed N (R) is constant, that is, ai = 0, τ ₁ is expressed by the following equation.

[0025] _{τ 1 = (T / 25.4)} (1 / bi) {(i + 1) (R 0/10) -R} × 10 3 ... Also, when the ai ≠ 0, τ ₁ is represented by the following formula .

[0026]

[Equation 2]

The time τk required for spinning the k-th section is expressed by the following equation.

[0028]

[Equation 3]

Therefore, the remaining spinning time τr when the spinning length R exists in the i-th section is expressed by the following equation.

[0030]

[Equation 4]

Next, the display procedure of the remaining spinning time is shown in FIG.
An explanation will be given according to the flowchart of (b). Input device 3
When each operating condition is input by 1, the CPU 29 causes the CPU 29 of FIG.
The time τk required for spinning is calculated for each section of the flyer rotation speed shift pattern according to the flowchart of FIG. 7A, and the result is stored in the working memory 32. CPU
First, 29 determines whether or not the slope ak of the flyer rotation speed shift pattern in the 0th section is 0. If ak is 0, the equation is used. If ak is not 0, the time τk is obtained using the equation.
Is calculated. Then, the result is stored in the work memory 32. Hereinafter, similarly, the time τk required for spinning in each section from the first section to the ninth section is sequentially calculated by the formula or the formula. This work is performed before the operation of the roving frame is started.

Simultaneously with the start of the operation of the roving frame, the CPU 29 calculates the spinning length R from the count value of the counter 33, and in which section of the flyer rotational speed shift pattern shown in FIG. 3 the present spinning length R exists. Judgment, that is, current spinning length R
Confirm the existing section of. Next, it is determined whether or not the slope ak of the flyer rotational speed shift pattern in the section in which the current spinning length R exists (in this embodiment, the jth section) is zero. If ak is not 0, the time τ ₁ required to pass through the section is calculated by an equation. Then the time tau _1, obtains the remaining spinning time τr by the sum of the time tau ₂ required from the rest of the (j + 1) th section to the spinning end of the ninth segment (= full bobbin), displays the time τr It is displayed on the device 34. The time τ ₂ is obtained by the sum of the time τ k required for spinning in each section, which is calculated before the start of operation.

In the remaining spinning time calculation method of this embodiment, the time τk required for spinning in each section is calculated in advance before the start of the operation of the roving machine and stored in the working memory 32.
After the start of operation, it is not necessary to calculate the time τk one by one when the remaining spinning time τr is sequentially calculated, and the calculation time is shortened.

The present invention is not limited to the above-described embodiment. For example, when a flyer rotational speed shift pattern is input, the period from the start of winding to the full tube spinning length is divided into sections other than 10 equal parts. Then, the values of the spinning length and the flyer rotation speed at the end points of each section may be input. Each section does not necessarily have to be at equal intervals.

Further, instead of obtaining the time τk required for spinning in each section in advance before operation and storing it in the working memory 32, the time required for spinning in the section required when the remaining spinning time τr is calculated. τ k may be calculated each time.

Further, when setting the flyer rotation speed shift pattern, instead of inputting the flyer rotation speed and the spinning length at the end points of each section, the average flyer rotation as in the method previously proposed by the applicant of the present application. The CPU 29 may determine the flyer rotation speed shift curve when the number Nav is input. In this case, in the case of a configuration in which a large number of flyer rotation speed shift curves are stored in advance in the work memory 32, the spinning length and the spin length corresponding to each flyer rotation speed shift curve are selected. A curve or a database showing the relationship with the remaining spinning time is stored in the work memory 32.
Alternatively, the remaining spinning time may be obtained from the curve or database. Further, as a method of calculating the remaining spinning time, another approximation method may be adopted.

Further, instead of the structure in which the remaining spinning time is sequentially calculated and displayed on the display device 34, when the operator operates a predetermined key of the input device 31 when he / she wants to know the remaining spinning time, The CPU 29 may calculate the remaining spinning time and display it on the display device 34.

Further, the method of displaying the remaining spinning time is not limited to the screen display, and a method of sounding an alarm and notifying the operator when the remaining spinning time reaches a predetermined value, for example, 5 minutes before full filling. Alternatively, a method of notifying the preparation step of the next work by communication or the like may be used.

Further, a drive system using a cone drum is adopted as a speed changing drive means of the spindle 7, or the flyer drive system, the spindle drive system and the bobbin rail drive system are all independently provided without providing the differential gear mechanism 12. It may be configured to be driven by a motor.

[0040]

As described above in detail, according to the present invention, even when the flyer rotation speed is sequentially changed during operation, the remaining spinning time to full can be easily known when necessary. Therefore, the worker can efficiently perform the preparation work for the doffing or the sliver can exchange.

Further, in the invention described in claim 2, since the remaining spinning time is sequentially displayed on the display device, the operator can immediately grasp the remaining spinning time only by looking at the display device.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a control device.

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

FIG. 3 is a graph showing a flyer rotation speed shift pattern.

FIG. 4 is a partially enlarged view of the flyer rotation speed shift pattern of FIG.

FIG. 5 is a flowchart showing a procedure for determining a remaining spinning time.

FIG. 6 is a graph showing a conventional flyer rotation speed shift curve.

[Explanation of symbols]

2 ... Flyer, 6 ... Bobbin rail, 26 ... Rotation speed detector, 29 ... CPU as arithmetic means, 31 ... Input device,
32 ... Working memory as storage device, 33 ... Counter, 34 ... Display device, B ... Bobbin, R ... Rough yarn.

Claims (2)

[Claims] 1. A roving machine for forming a roving winding while changing the flyer rotation speed in accordance with the length of the roving wound on a bobbin, wherein a flyer rotation speed shift pattern, full tube spinning length, twist number, etc. An input device for inputting the operating conditions of the storage device, a storage device for storing the operating conditions input by the input device, a counter for counting the spinning length, the operating conditions and the count value of the counter until a full pipe. A remaining spinning time display device for a roving machine, comprising: a computing means for computing the required remaining spinning time; and a display device for displaying the remaining spinning time computed by the computing means. 2. A roving machine for forming a roving winding while changing the flyer rotation speed according to the length of the roving wound on a bobbin, wherein a flyer rotation speed shift pattern, a full tube spinning length, and a twist number are set. A method for displaying the remaining spinning time of a roving machine, which sequentially calculates the remaining spinning time required to fill a pipe from the operating conditions including the count value of a counter that counts the spinning length, and sequentially displays the result on a display device. .