JPS62117829A - Tension control device for roving of roving frame - Google Patents

Abstract

PURPOSE:To make it possible to wind roving always at fixed tension without requiring troublesome regulation even if kind and spinning condition of the roving are changed, by carrying out belt travel of cone drum by an exclusive motor controlled by a microcomputer. CONSTITUTION:In a roving frame wherein a belt 6 wound and hung between a pair of code drums 3 and 7 is traveled by belt shifters 9-22 and roving is wound around a bobbins always at fixed tension, a motor to drive gears 20 and 21, a means 26 to detect winding length of the roving around the bobbin 5 and the control device 30 consisting of a microcomputer are set and the con trol device 30 outputs a fittest travel distance of belt shifters corresponding to a signal received from the detection means 26. Consequently, the motor 20 is rotated to revolve the cone drums 3 and 7 under optimum condition.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to the control of the roving winding tension of a roving machine, and more specifically, the present invention relates to the control of the roving winding tension of a roving machine, and more specifically, the invention relates to the control of the roving winding tension of a roving machine, and more specifically, the roving that is being spun is always wound with a constant tension regardless of the bobbin diameter. Relating to a tension control device for taking.

[Conventional technology]

In a bobbin lead type roving frame, the roving fed out from the front roller at a constant speed is wound onto the bobbin by the difference in rotation speed between the flyer, which rotates at a constant speed, and the bobbin, which rotates at a higher speed. The winding condition of the roving is influenced by the tension state of the roving, which is being twisted and traveling between the front roller and the flyer top.

In other words, when the roving is moderately loose, winding of the roving on the bobbin is performed well, but when the tension of the 4I yarn varies, the per unit length of the wound roving This causes fluctuations in the weight of the yarn, causing unevenness in the roving. On the other hand, using a pair of cone drums, the belt is moved in the axial direction of the ram to adjust the rotational speed of the driven tram to 3J3+ and reduce the rotational speed of the bobbin as the amount of roving wound on the bobbin increases. Mechanisms for adjusting the tension of the roving are commonly used in roving machines. However,
The number of layers of roving wound around the bobbin and the rate of increase in the bobbin diameter vary depending on the spinning conditions such as the type of spun fiber, heavy V, rotational speed of the flyer, and number of twists of the braided yarn. In the method using a corn tram, it is difficult to control the roving frame so that the winding tension is constant from the start of winding to the full tube under all spinning conditions.

[Problem that the invention seeks to solve]

For this reason, many proposals have been made to keep the roving tension constant during spinning. For example, Tokuko Sho 52-48652
No. 2, proposes a roving tension correction device that uses a cam to appropriately change the feed foot of a belt shifter and that can change the shape of the cam in response to changes in spinning conditions. However, these methods require setting the correction device while observing the tension of the roving between the front roller and the flyer top at several points from the start of bobbin winding to the full bobbin while spinning once under the given spinning conditions. However, it was time-consuming and had only a few checkpoints, so it was not perfect. Moreover, since the correction device employs a cam-link mechanism, there is a drawback that the mechanism becomes complicated. Furthermore, as shown in Utility Model Publication No. 52-13376, the shape of the cone drum is formed into a hyperbolic shape, and the desired tension control can be obtained by moving the belt shifter by a certain amount in response to an increase in the number of wound layers of silk yarn. Some are configured like this. However, in such an apparatus, it takes time and effort to manufacture the cone drum, and furthermore, when the weight or type of fiber of the spun roving changes, some kind of correction means is still required.

Therefore, in reality, workers at production sites monitor the roving tension and adjust the operating conditions so as to maintain a normal tension at all times.

c. Means for Solving the Problem] In order to achieve the above object, in the present invention, the belt wound between the pair of cone drums is rotated by a gear system each time the number of roving layers wound around the bobbin increases. In a roving machine equipped with a speed change mechanism that changes the rotational speed of the bottom cone drum by sliding a belt shifter that is linked to a long rank that is moved via a A control device comprising a means for detecting the winding length or the number of winding layers and a microcomputer is provided, and the control device is configured to respond to a signal regarding the winding length or layer failure of the roving that is manually input from the detection means to the microcomputer. and controlling the rotation angle of the motor so as to realize a belt shifter movement corresponding to a roving winding length or a winding layer number preset in the microcomputer. A roving tension control device is provided.

(Function) In the present invention, while continuously measuring the spinning length of the roving or the number of winding layers, the long rack is moved according to the set value of the belt movement amount which is stored in advance in the microcomputer. A control signal is sent to the motor to cause the spinning to occur, thereby decreasing the rotational speed of the bobbin to obtain a braiding tension suitable for spinning. It is preferable to set the value by selecting multiple locations until the bobbin is full, but between each set value, the known interpolation method should be used depending on the measured roving layer or number of layers. Based on this, the microcomputer automatically calculates the results and outputs the results as motor control signals.

In another example, the set value is determined for each number of wound layers to perform more precise control.

〔Example〕

The present invention will be explained in more detail with reference to preferred embodiments shown in the drawings.

As shown in FIG. 1, in the roving frame, the front roller 1, flyer 2, and top cone drum 3 are driven by a common main motor 4 through rotation transmission means (shown by thick solid lines) such as a gear train and a timing belt. The rotation from the main motor 4 and the rotation from the bottom cone drum 7 which is rotated at variable speeds from the top cone drum 3 via the belt 6 are combined and transmitted to the bobbin 5 by an operating mechanism 8. ing.

A long rack 10 to which a belt shifter 9 for moving the belt 6 is fixed is attached to an upright shaft 12.
It is disposed so as to be able to reciprocate in the lateral direction at a position where it meshes with a pinion 13 fitted to the pinion. The amplifier light shaft 12 is configured to be moved left and right by a rack feed motor 22 via a worm 20 and a worm wheel 21.

On the other hand, in order to detect the spinning length of the roving, a sensor 26 is provided to detect the rotation speed of the front roller l. A signal regarding the roving spinning length from this sensor 26 is sent to a control system, which will be described later, to determine a desired belt feed amount. Also, a sensor 2 for detecting the vertical movement direction of the bobbin rail.
7 is attached, and when the moving direction of the bobbin rail changes, the belt is moved by driving the motor 22 by the heald feed amount determined from the roving spinning length.

FIG. 2 shows a block diagram of a control circuit for motor 22 of the present invention. The control circuit includes a microcomputer 30, a memory 31, an input interface 32, and an output interface 33. The input interface 32 includes a setting device 34 for presetting a set value of the belt feed amount corresponding to the roving spinning length, and the sensor 26.
．． 27 are connected. These human input signals are processed by the microcomputer 30 and output from the output interface 33 to the motor 22 as a control signal such as the number of pulses according to a set value, and the motor 22 is rotated by a predetermined number of rotations or rotation angle.

As shown in FIG. 3, the set value of the belt feed amount stored in the microcomputer 30 is set for each roving length at several appropriate points until the bobbin is full, for example, for each constant loss yarn length. In the figure, 1. .

11. −, I n is the spun roving length, D − + D +
+ '-' D n is the setting value corresponding to this,
These are stored in advance in the memory 31 from the setting device 34.

On the other hand, the actual spun length of the roving is also continuously stored in the memory 31 through the interface 32. Inside the microcomputer 30, the set value and the measured roving length l are
Based on this, in order to more finely control the settings between the set values, the set values are proportionally modified to increase the number of control points in the computer 30, for example, by a known interpolation method as shown in the following equation. Work is done.

A signal corresponding to the corrected setting value obtained by this operation is sent from the output interface 33 to the motor 22, and the desired heald movement is performed.

Moreover, instead of setting the set value with respect to the spun roving length, it can also be set according to the layer of the TRT yarn wound on the bobbin (FIG. 4). In this case, the sensor 27 detects the number of layers. Setting values can be determined for each layer, but
As in the case described above, it is advantageous to define setting values for each appropriate number of layers and compensate for them by interpolation, since the input work for setting can be simplified.

〔Effect of the invention〕

In the present invention, when moving a cone drum with a belt,
A dedicated motor is installed, and the rotation of the motor can be controlled according to the belt feed amount curve according to the spinning length of the roving or the number of winding layers, which is preset in the microcomputer. Even if conditions change, it is possible to immediately adapt to the change and always perform optimal roving winding without replacing mechanical parts or installing a complicated correction mechanism, reducing maintenance and operation effort. It becomes possible to significantly reduce the amount and improve the quality of the spun roving.

Furthermore, even if the cone drum is made into a simple straight conical shape, there will be no problem with the control results.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing the drive system of the bill spinning machine of the present invention. FIG. 2 is a graph showing an example of a heald feed type setting curve with respect to the spun roving length when using the apparatus of the present invention. FIG. 3 is a block diagram of the control circuit of the device of the present invention. FIG. 4 is a graph showing an example of a belt feed type setting curve with respect to the number of layers of roving wound on the bobbin. ■...Front roller 2...Flyer 3...Top cone drum 4...Main motor 5...Bobbin 6...Belt 7...Bottom cone drum 22...Rack feed motor

Claims (1)

[Claims] 1. A belt wound between a pair of cone drums is slid by a belt shifter that is linked to a long rack that is moved via a gear system each time the number of roving layers wound around the bobbin increases. In a roving machine equipped with a speed change mechanism that changes the rotational speed, a control device comprising a motor for driving the gear system, a means for detecting the winding length or the number of winding layers of the roving on the bobbin, and a microcomputer. is provided, and the roving winding length or the number of winding layers is set in advance in the microcomputer in accordance with a signal regarding the winding length or the number of winding layers of the roving that is input to the microcomputer from the detection means. A roving tension control device for a roving frame, characterized in that the rotation angle of the motor is controlled so as to realize a corresponding belt shifter movement amount.