JPS60146016A - Device for controlling winding tension of roving in roving machine - Google Patents

Abstract

PURPOSE:To control the winding tension of roving at a proper roving tension, by moving and adjusting a belt shifter according to the fluctuation in roving tension between front rollers and a flyer top in spinning. CONSTITUTION:The position of a roving (R) between front rollers 1 and a flyer top (2a) is continuously detected by a noncontact sensor 26, and the tension state of the roving (R) is calculated by a microcomputer (M). The resultant tension value is compared with a standard value to judge whether the tension state of the roving (R) is proper or not, and a reversible motor 23 of a bent shifter moving mechanism capable of moving a belt shifter 9 regardless of the increase in the roving layer is revolved in forward or reverse direction for a given time.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a yarn winding tension control device for a roving frame.

In the conventional bobbin reed type roving frame J3, the silk thread is sent out at a constant speed from the roller to the flon 1, depending on the rotation difference between the flyer, which rotates at a constant speed, and the bobbin, which rotates at a higher speed. The silk thread is twisted and wound onto a bobbin,
The winding condition of the roving is influenced by the tension state of the roving that is being twisted and traveling between the flon 1 to rollers and the top of fly A7. In other words, when the silk thread is moderately loose, the winding of the roving on the bobbin is performed well, but if there is a fluctuation in the tension of the braided thread, the weight of the wound thread will fluctuate. It causes thread μm. 8. As is well known, there is a system in which a pair of rollers are used to adjust the rotational speed of the drum and the tension of the braided yarn. However, the type and weight of the spun fibers The number of layers of roving wound on the bobbin and the rate of increase in the bobbin diameter vary depending on spinning conditions such as flyer rotation speed and number of twists. It is difficult to adjust the machine so that the winding tension is constant from the start of winding to the full tube depending on the spinning conditions.

For this reason, many proposals have been made to keep the tension of silk thread constant. For example, Publication No. 52-13376 published on March 25, 1972 or December 1, 1972.
Bell l-
A roving tension correction system has been proposed in which the amount of movement of the shifter can be appropriately changed using a cam, and the shape of the cam curve can be changed in response to changes in the spinning strip A'1. Ru. However, while spinning once under the given spinning conditions, the correction device is used to adjust the tension of yarn 11 between Freon 1 and roller 79417171 at several points from the beginning of winding the bobbin until the bobbin is full. It is difficult, time-consuming, and has several checkpoints, so it is not perfect. Also, JP-A-50-4338, published on January 17, 1975, and JP-A-56-22964, published on May 28, 1981.
Japanese Patent Publication No. C proposes a device that is controlled and driven by a program control device and instantly adjusts the amount of movement of a belt shifter. These devices are easier to set up and have more checkpoints than the devices that use the cams mentioned above, but each spinning line is different from the other. It is necessary to actually measure the change in the winding tension at each step and calculate the curve of the moving part to maintain a constant tension. Furthermore, there is a disadvantage that the condition of the braided yarn during the spinning test is not necessarily the same as the condition during operation.

On the other hand, the special public notice of ``July 10, 1975]''
Publication No. 532 discloses that when the roving between the front wire and the flyer top is loosened by more than a certain meter, it is detected by a phototube, and the loosening is corrected.
~A method has been proposed for controlling the bobbin rotation speed by moving a shifter. In this method, it is not necessary to perform a spinning test in advance for each spinning condition, but there is a disadvantage that if the tension of the roving increases, it cannot be detected and corrected.

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

Purpose This invention was made in order to solve the above-mentioned conventional problems, and its purpose is to monitor the tension state of the braided yarn between the controller and the flyer top during spinning on behalf of the operator. An object of the present invention is to provide a roving winding tension control device for roving #/j ti that can adjust the movement of a belt shifter in response to tension fluctuations and automatically control the roving to maintain an appropriate roving tension at all times.

414th Form of the Invention In order to achieve the above-mentioned object, the present invention provides a belt shifter that is moved by a predetermined amount via a gear system each time the number of braided yarn layers wound around the bobbin increases, regardless of the increase in the number of roving layers. A belt shifter moving mechanism that can move the belt shifter is provided, and a non-contact sensor that can continuously detect the position of the roving between the flier 1 to the roller and the flyer top is provided. The tension state of the braided threads is estimated by using the method, and this value is compared with a preset reference value to determine whether the tension state of the braided threads is appropriate. If the tension is not appropriate, the belt shifter is moved. A micro combicoater was installed that emitted a signal to activate the 1 mechanism.

EXAMPLE An example embodying the present invention will be described below with reference to the drawings. As shown in Fig. 1, the front roller 1, the fly 172, and the bottom drum 3 are driven by a common main motor 4 via a rotation transmission means (indicated by a thick solid line) such as a gear train A] timing belt. The bobbin 5 is provided with a combination of rotation from the main motor 4 and rotation from the bottom cone drum 7 which is rotated at a C speed from the top cone drum 3 to the bell 1 via the gear 6 by a differential gear mechanism 8. It is meant to be transmitted.

Bell 1-shifter 9 for moving the bells 1 to 6
The long rack 10 to which is fixed is arranged so as to be movable in the lateral direction at a position where it meshes with a pinion 13 fitted to the upright shirt 1-12, which rotates η as the ways 1 to 11 descend. . The upright shaft 12 has a rotating shaft fixed to the gear 17 that meshes with the gear 16 fixed to the shafts of the ratchets 1 to 15, which are regularly rotated by a predetermined m when the bobbin rail 14 is switched down and down. 18 is transmitted via the differential gear machine IM19, and the rotation of the bobbin 5 is transmitted through the differential gear machine IM19.
Each time the number of roving layers wound on increases, the pinion 13 is rotated for a certain period of time by the winding switch 115 of the bobbin rail 14, and the long rack 10 is moved to the left in FIG. It has become.

The differential tooth width mechanism 19 includes a bevel gear 20 fixed to the lower end of the upright 1 to the shaft 12, a bevel gear 21 fixed to the upper end of the rotating shaft 18, and a bevel gear 22 meshing with the bevel gear 20.21. It consists of /) + + et al. Bevel gear 22
is a rotating body including a bell 1 to shifter moving mechanism, which has teeth 25a that mesh with a worm 24 driven by a reversible motor 23, and rotates about the upright shaft 12 and the rotating shaft 18. It is supported by 25. Therefore,
The J3 is in the fixed state of the radiator wheel 15 and is reversible.
When the gear 23 is driven, the bevel gear 2 is driven through the worm 24.
2 is an uprighton 1 funo 1 to 12 with a rotating body 25
revolves around the axis of - (rotates the bevel gear 2o,
The movement of the belt shifter 9 is adjusted via the pinion 13 and the long rack 1o. In the device of this embodiment, when the reversible motor 23 rotates in the normal direction, the belt thick 9 moves in the right direction in FIG. The rotation of the bottom cone drum 7 is moved in a direction that slows down the rotation of the bottom cone drum 7.

The non-contact sensor 26 for continuously detecting the position of the roving R between the front roller 1 and the fly λ7 totsu 72a is 1.
As shown in FIG. 72, it is provided with a light emitting part 27 and a light receiving part 28, which are arranged opposite to each other, and the roving R is arranged between them. The light emitting section 27 is composed of an infrared light emitting diode array, and the light receiving section 28 has a light receiving element array consisting of a large number of light receiving elements 28a arranged in parallel in the vertical direction at a pitch of about half the diameter of the roving R (about 1 mm). have. Each light-receiving element 28a emits an electric signal corresponding to the intensity of the light it receives and inputs it into a microcomputer (hereinafter abbreviated as microcomputer) M. The roving R is the light emitting part 27
By blocking part of the light from the roving, the light-receiving element 28a corresponding to the position of the roving R no longer receives light, so the position of the roving R can be changed by detecting the light-receiving element 28a.

In the device of this embodiment, the bit of the light-receiving element 28a is approximately 1rIl111, and the infrared light from each light emitting diode 27a has a diffusing property.
) to (C') tJ: One to three light-receiving elements sense the shielding of infrared light by the sea urchin roving R at a time.

The light receiving element 28a that sensed this shielding is read and converted into a position value. When three light receiving elements 28a simultaneously sense the shielding as shown in Fig. 3(a), the center position of the central light receiving element 28a is determined to be the position of the roving R, and as shown in Fig. 3(b). two light receiving elements 28 in
If a senses occlusion at the same time, the intermediate position between them is
Further, when only one light receiving element senses the shielding as shown in FIG. 3(C), the center position of the light receiving element 28a is determined to be the position of the roving R. The bits of data at this position are half the pitch of the light receiving elements 28a, and in the apparatus of this embodiment, position data at a pitch of 0.5 mm can be obtained.

Winding under proper tension, 7J<I)
The movement of the roving R is shown in FIG. 4(a), and the vibration has a substantially constant amplitude due to factors such as vibration of the machine base or rotation of the flyer top 2a. As the roving tension increases, the overall position becomes higher M, compared to the proper state as shown in FIG. 4(b), and the amplitude becomes smaller. Furthermore, when the roving tension decreases, the overall position is lower than in the proper state as shown in FIG. 4(C), and irregular vibrations occur. Therefore, by detecting the position and vibration of the roving R with the sensor 1 no. 26, the state of the roving tension can be continuously detected.

Next, a method for determining braiding thread tension using a human input signal from the sensor 126 sent to the microcomputer M will be explained. First, as shown in FIG. 5, position data is collected for a predetermined time T1, and the maximum value MAX and minimum value MI during that time are
Find N, repeat this 0 times, and get the 11 maximum values (MAX1
~n) and the minimum value (M I N 1-11). Then, based on the values, amplitude data 8, level data L, and amplitude data A defined by the following formula are set as the reference level value LS and reference amplitude value As in the appropriate tension state, respectively.
, the value of level data L is the reference level value LSJ,
If the tension is small, count it with a low tension saw counter as a low tension state, and the value of the level data becomes the reference level value 13.
With the above, the value of amplitude data A is J3 [1! , amplitude 1 white ΔS
If it is smaller, it is counted as a high tension state and overturned by the grudge counter. After repeating this judgment α times,
When the count number of the low tension counter is above the predetermined set value and the count number of the high tension counter is below the predetermined set value,
It is determined that the roving [() is in a low tension state.Also, when the count number of the high tension counter is more than a predetermined setting value and the count number of other length counters is less than a predetermined setting value, it is determined that the roving is in a high tension state. If it is determined that there is a low tension state, a signal is sent to drive the reversible motor 23 in the forward direction, and if a high tension state is determined (or the reversible motor 23
A signal is issued for a predetermined period of time to drive the motor in the reverse direction. This signal current is amplified by an amplifier 29 and passed through an output relay 30 to prevent the reversible motor 23 from rotating forward or reverse for a predetermined period of time.

Determining the tension state of the roving thread R using the microcomputer M! Data sampling is performed according to a preset data limbing program from the time when the rotation of the bottom cone tram 7 has stabilized after the bobbin rail 14 has turned, and after the tension state has been determined, the belt shifter position correction period and a predetermined After the controller 1~roll pause period has passed, data collection, judgment, and correction are performed sequentially again. Data sampling by the microcomputer M is performed not every time the bobbin rail 14 is raised or lowered, but also during the raising or lowering of the bobbin rail 14. The movement is adjusted.

Note that the present invention is not limited to the above embodiment, and the light emitting section 27 may be replaced with an infrared light emitting diode 278.
It is possible to deviate from the spirit of the invention, such as by configuring it with a light emitting diode or a projector, changing the mounting pitch of the light receiving element 28a, or replacing it with another configuration that does not use the differential gear mechanism 19 as the belt jitter movement 1aid. ,
It is also possible to arbitrarily change the shape, configuration, etc. of each part within the range specified above.

Effect As explained above, according to this defense, when spinning
The system detects the tension state of the braided yarn between the controller roller and the flyer top, adjusts the movement of the belt shifter according to changes in tension, and automatically controls the roving to maintain an appropriate roving tension angle at all times, making it easier to use than conventional fixed rovings. Compared to spinning under Iζ conditions, braided yarn of more stable quality can be obtained, and unlike conventional equipment, there is no need for extensive preparation work to obtain the roving tension that matches the spinning conditions. Qin excellent effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view of an embodiment embodying this invention;
Figure 2 is a side view showing the relationship between the braided yarn and the sensor'; Figures 3 (a) to (0) are schematic diagrams showing how the braided yarn blocks light from the light emitting section; Figure 4 <a> ~(0) is a diagram showing the change in the position of the roving, FIG. 5 is a diagram showing the change in the position of the roving, and FIG. be. Front roller 1, fly 17 top 281 top cone drum 3, bobbin 5, belt 6, bottom cone drum 7, belt shifter 9, long rack 10, differential gear mechanism 19, reversible motor 23, sensor 26, light emitting section 27,
Light receiving section 28, light receiving cable 28a, roving R, microcomputer M0 Special 1 Applicant Toyota Industries Corporation Agent Patent attorney On 1) 1 Sensho Figure 2 (a) (b) (C)

Claims (1)

[Claims] 1. A belt wound between a pair of cone drums is moved in conjunction with a long rack that is moved by a constant pitch via a gear system each time the number of braided yarn layers wound around a bobbin increases. The bell 1 that can be moved to the bottom by sliding it with the shifter]
- The shifter is moved to Bell 1 regardless of the increase in the number of braided yarn layers on a J5 roving frame equipped with a speed change mechanism that changes the rotational speed of the braided drum. 1! ? In addition to installing a belt shifter moving mechanism, the Freon 1 roller and flyer 1
~ A non-contact sensor capable of continuously detecting (11/same) of the braided thread between the knobs is provided, and the tension state of the braided thread is calculated based on the output signal from the sensor 1), and its value is calculated. and a preset reference value to determine whether or not the tension state of the braided yarn is appropriate, and if the tension is not appropriate, a microcomputer generates a signal to operate the belt shifter moving mechanism.
A braiding yarn winding tension control device for a roving frame, characterized in that it is provided with. 2゜The sensor has a light-emitting part and a light-receiving part, and the light-receiving part is arranged in parallel in the vertical direction and is constituted by a large number of light-receiving elements that emit electrical signals corresponding to the intensity of the light received. A roving winding tension horn control device for a roving frame according to claim 1.