JPS5950765B2 - Winding control method and device for spinning lap machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wrapping machine for spinning, and more particularly, to a winding machine capable of keeping the gel to be wrapped substantially constant over the entire length from the beginning of the winding to the end of the winding. The present invention relates to a control method and a control device having an optimal structure for implementing the method.

When we weigh the gelen (fabric weight per unit area) of a wrap that is wound at a constant speed and draw using a wrap machine that performs surface winding under pressure, we find that it is always light at the beginning of the winding, and as the winding diameter increases, it decreases to a specified value. It is clear from various actual measurements that it recovers to its original state.

Here, draw refers to the winding tension based on the difference between the winding speed and the feeding speed, and in principle, if winding is performed under a constant draw, a wrap with a constant gel can be obtained. However, it is unavoidable that the gelation transition as described below occurs and the gelation tends to decrease, especially at the beginning of winding.

By the way, in a lap with such variation in slope,
There is a problem of not being able to obtain uniform quality in the combing process of post-processing, but in the past, it was common to accept the drop in quality and continue winding as usual without taking any solutions. Met.

Apart from this, some attempts have been made to correct gellen fluctuations, but in this case, most methods involve increasing the number of doublings, resulting in a reduction in production efficiency due to duplication of processes, and This was not a good idea as it would increase costs.

In view of the current situation where no fundamental solution has been achieved, the present invention provides a simple and reliable means (
Therefore, it is possible to correct the above-mentioned gel grain fluctuation, and in particular, the draw between the winding roller and the feed roller in a pressurized surface winding type lapping machine is gradually changed at the beginning of winding. , the take-up roller is started with its circumferential speed reduced, and then gradually increased in speed to reach a speed at which an appropriate draw is formed between it and the delivery roller in a predetermined time, while the delivery roller is kept at a constant speed. By operating at a circumferential speed, the wrap when winding at a constant speed and constant draw becomes a fluctuating state in which the gelatin gradually decreases and then gradually increases at the beginning of winding, and the gelatin is kept constant during subsequent winding. The present invention is characterized by a control method capable of correcting the transition state of the gel, which becomes a stable state, and keeping the gel at a constant value from the start of winding to the end of winding.

Furthermore, an important feature of the present invention is to provide a practical device suitable for implementing such a control method.
In particular, it has two driving shafts and one driven shaft, and the first and second
A differential gear device formed so that the gear ratio between the first driving shaft and the driven shaft can be changed by causing planetary gears to actively revolve around a second driving shaft which is rotated by a motor among the driving shafts; The differential gear device is interposed as a power transmission mechanism between the shaft of the feed roller and the shaft of the take-up roller, and includes a control means for controlling the rotation of the motor, and the control means controls the rotation of the motor. It is characterized by a control device that controls speed, including starting and stopping, as well as acceleration and deceleration in between, based on a specific driving mode.

Hereinafter, the content of the present invention will be explained in detail with reference to the accompanying drawings.

Figure 1 shows a spinning wrapping machine that performs surface winding under pressure P, and includes a pair of rollers R, , , which are arranged in parallel with a valley.
A take-up roller 1 consisting of R2 and a pair of nip rollers R
3, and a feed-out roller 2 consisting of R4, the peripheral speed of the feed-out roller 2 and the circumferential speed of the take-up roller 1 are made equal, or the take-up roller 1 is made slightly faster at a fixed ratio. The rollers R□ and R2 of the winding roller 1 are generally used to perform a winding operation, and each of the rollers R□ and R2 of the winding roller 1 is a striped roller having grooves cut in its periphery that extend parallel to the axis.

However, in the above-mentioned winding operation, the fixed length of the lap L to be wound, for example, the weight per yard (gelen) should be constant in principle, but after repeated actual measurements, it was found that the As shown in the figure, there is a large variation in the grain at the beginning of winding, and the one with a given grain gradually becomes lighter.
It was found that after changing direction around 5 Yd, gelane gradually recovered, and became disaturated and stable around 80 to 90 Yd.

This decrease in grain at the beginning of winding is thought to be due to irregular drafting during winding after entering the streak rollers R, , R2, and the reasons for this are (I). ) The shape and contact pressure state of the streak roller, (b) the repeated effects of compression and expansion during winding, and the effect of the centrifugal force of the e-wrump.

Among the factors listed in (a) to (-c) above, in (a), it is possible to reduce the degree of gelation reduction at the initial stage of winding by weakening the contact pressure, but it may lead to unstable winding. This is undesirable as other problems arise.

Next, regarding the (middle) term, for example, if we assume that swelling (meaning that the contact with the take-up roller 1 separates and swells from a pressed state to a free state and swells) has an effect on irregular draft. Although the gelatin should decrease as the diameter increases, there is no change above a certain winding diameter, so this is not considered to be a direct cause.

Finally, looking at the e term, in the wrap L having the shape shown in Figure 3, the winding speed is 60 m/@g = 10
0 cm/sec %Rubgelen 50 f/'m,
=0,5? /cwt, and assuming that the winding radius is R, the centrifugal force Fc applied to a wrap element with a length of lCm and a predetermined width in the winding direction is expressed as a hyperbolic graph proportional to the reciprocal of the winding diameter. The result is as shown in Fig. 4.

Comparing this Fig. 4 with Fig. 1 above, we can see that the irregular fluctuation state in the initial stage of winding shown in Fig. 1 is thought to be due to the disturbance during restart after automatic dotting due to stoppage. It is thought that the trends in the graphs are very similar.

Therefore, based on the above comparison results, there is no problem in thinking that the cause of irregular draft is mainly due to centrifugal force, and when a small ball with a small radius is produced during winding, it is necessary to The phenomenon in which the film bulges out in the tangential direction due to centrifugal force at the point where it is about to come into contact with the take-up roller 1, creating a sagging state backward, can be fully explained by considering the centrifugal force.

From the above, in order to correct the grain transition state as shown in Figure 2 and perform winding that can maintain a constant grain from the beginning of winding to the end of winding, the winding speed at the beginning of winding must be slowed down. Then, the speed can be gradually increased until a stable speed is reached after an appropriate period of time.

For example, the speed at the beginning of winding may be set to 30-7 Z/m, and the acceleration time may be set to 1i to reach 60 m/wm, but the control methods exemplified above can be summarized as follows.

That is, at the beginning of winding, the winding roller is started with its circumferential speed reduced, and then the speed is gradually increased to reach a circumferential speed at which an appropriate draw is formed between it and the feed roller 2 in a predetermined period of time. while holding the feed roller 2 at a constant value.
is operated at a constant speed.

To implement this method, the existing drive motor must be left as is.
Naturally, one example of using this method is to provide an inverter on the power supply circuit side so that the initial speed and acceleration time can be set.

Of course, various other practical devices are possible, but among the various devices, the control device according to the second invention will be described below as having the excellent advantages of simple structure and easy control.

This device consists of the structure shown in FIG. 5 and related control means. A differential gear device 3 is provided between the shafts of the feed roller 2 and the take-up roller 1 for power transmission. is used as a mechanical element, and the device 3 is controlled by the control means.

The differential gear device 3 includes a first driving shaft 5 and a driven shaft 7 coaxially arranged and rotatably supported by a casing 8, and the casing 8 rotates around the first driving shaft 5 and the driven shaft 7. The casing 8 includes a sun gear 9.10 and a planetary gear 11.12.
13 and 14 are housed therein.

The sun gear 9 is fitted onto the first driving shaft 5, and the sun gear 10 is fitted onto the driven shaft 7, and is coaxially coupled with the planetary gear 11 to be rotatably supported on the casing 8. 9 and 10, respectively, and planetary gears 13 and 14.
are coaxially connected and rotatably supported by the casing 8, and are meshed with sun gears 9 and 10, respectively.

The first driving shaft 5 is connected to the drive shaft S2 of the delivery roller 2 via sprocket G2, chain 7, and sprocket G0, while the driven shaft 7 is connected to the drive shaft of the take-up roller via sprocket G1 chain and sprocket G4. S1
Connect to.

Further, the second driving shaft 6 has a sprocket G5. G6 is connected to the output shaft of the motor 4 via the speed reducer 15, and thus the differential gear device 3 is connected to both shafts of the feed roller 2 and the take-up roller S2. A power transmission mechanism is interposed between the S and S.

Naturally, the following relational expression holds true for the differential gear device 3.

As is clear from the above equation, if the second driving shaft 6, that is, the casing 8 is fixed and stops rotating (w3=0), on the other hand,
Naturally, when the second driving shaft 6 is rotated in the same direction, the driven shaft 7 speeds up, and when the second driving shaft 6 is rotated in the opposite direction, it is decelerated.

Therefore, if the control means starts, stops, and controls the speed of the motor 4, the circumferential speed of the feed roller 2 can be kept constant and the circumferential speed of the take-up roller 1 can be variably adjusted based on the force.

In this case, the control means performs specific control so that a constant gel is maintained over the entire area from the beginning of winding to the end of winding of the wrap L, and the winding roller 1 and the winding roller 1 are arranged on the vertical axis. A diagram showing the draw value (circumferential speed ratio) between the feed rollers 2 and the winding length (time) on the horizontal axis: Downward right a1 Horizontal b1 Upward right c,! , - and horizontal lines d (see Figure 6),
A control command is issued based on an operation mode formed by a diagram that approximates the gellen transition state that the wrap L has when winding is performed at a constant speed and a constant draw value.

The manner in which the winding operation is performed using a control device having an inclined configuration will be explained next. When the rotation of the motor 4 is stopped and the casing 8 of the differential gear device 3 is fixed, the device 3 performs a simple deceleration. It functions as a gear mechanism,
The number of teeth of the sprockets 01 to G4 is adjusted so that the draw value between the rollers 1 and 2 becomes a predetermined α in the above usage mode.

In this state, winding is performed at a constant speed, and the transition per unit length of the wrap L obtained is first measured, and an approximate operating mode diagram (water line diagram in Figure 6) is drawn from this. At the same time, check the maximum change α′ in the draw value and find α=α′
Adjust the number of teeth on sprocket) G□~G4 so that

Then, the rotation speed of the motor 4 is controlled according to the operation mode diagram.

0 Zone of the right downward straight line a During this predetermined time (11 seconds), the gel of the lap L is normally light, so the casing 8 of the differential gear device 3 is moved to the first driving shaft 5 by that amount. The driven shaft 7 is rotated in the opposite direction to slow down the rotation of the driven shaft 7.

Since the slope change in this case is regarded as a linear change, the startup time of the motor 4 is set to 11 seconds so that the correction of the draw fluctuation value (α'%) is completed during this time.

0 horizontal straight line zone for a predetermined time (12 seconds) (casing 8
It is only necessary to maintain the rotation of

○Zone of the right-up straight line C The motor 4 is decelerated so that it is decelerated and stopped during a predetermined time (13 seconds), and thereafter the motor 4 is stopped and the differential gear device 3 functions as a reduction gear train. let

By performing the above control, it is possible to obtain a lap with a constant gel.

In this case, the motor 4 can be controlled by only performing acceleration/deceleration control, and the acceleration/deceleration can be performed without any problem during the winding operation, and the motor control for changing the reduction ratio can be similarly performed without any problem even when the winding is stopped. .

Among them, when rewinding the next winding after a predetermined length of winding is completed, draft cutting of the wrap is performed by rotating the second driving shaft 6 of the differential gear device 3, that is, the cage jig 8, in the normal direction. You can also do it.

As described above, in order to correct the gelation change in the wrap at the initial stage of winding, the present invention reduces the circumferential speed of the winding roller 1 at the beginning of operation to prevent the centrifugal force from exerting a large effect. The rotation of the winding roller 21 is controlled so that the speed is gradually increased and the required draw is maintained in a predetermined time, and the rotation of the winding roller 21 is kept constant over the entire area from the beginning of winding to the end of winding. Because it can be retained in the gel, a product with uniform and stable quality can be obtained in post-processing processes such as the combing process, and production efficiency can be improved by eliminating unnecessary measures such as doubling to ensure quality stability. This has the effect of contributing to reducing product costs.

Furthermore, since the present invention enables the speed of the take-up roll 1 to be controlled to maintain a constant gel, the present invention can be easily controlled and is versatile enough to be easily applied to existing lapping machines. I'm here.

Furthermore, in the device according to the second aspect of the present invention, a mechanism subject to acceleration/deceleration control is formed in a differential gear device 3 provided as a power transmission mechanism between the feeding roller 2 and the winding roller 1. Therefore, it is possible to change the reduction ratio by controlling the rotation of the second driving shaft 6 not only during rotation, but also even when stopped and not transmitting power, and by performing this rotation control, there is no problem with the mechanism. Coupled with the ease of handling and the fact that it does not give any damage, it has great practical value.

Incidentally, the mechanical continuously variable transmissions that are commonly used cannot change gears unless they are rotating, and each time the wrap is changed, the control must be returned to the initial state via an operating part such as a steering wheel. There is a problem that the mechanism is complicated, and it is not at all comparable to the device of the present invention.

As described above, the present invention is capable of fully exhibiting various functions and effects, and is a significant invention that contributes to this field.

[Brief explanation of the drawing]

Fig. 1 is a schematic structural diagram of a wrap machine according to the method of the present invention, Fig. 2 is a diagram showing the gelation transition of the wrap after winding at constant speed and constant draw, and Fig. 3 is FIG. 4 is a diagram showing the relationship between the winding diameter of the wrap and centrifugal force; FIG. 5 is a diagram of the main drive system of the wrap machine according to an embodiment of the present invention; FIG. 6 is a perspective view of the wrapped wrap; The figure is an operation mode diagram according to the present invention. 1... Winding roller, 2... Delivery roller, 3... Differential gear device, 4...
Motor, 5...first driving shaft, 6...second driving shaft, T...driven shaft, L...lap.

Claims (1)

[Claims] 1. In a spinning wrap machine that provides a draw between the take-up roller 1 and the delivery roller 2 and performs surface winding by applying pressure, the delivery roller 2 operates at a constant circumferential speed from the time of startup. During operation, the winding roller 1 is started with its circumferential speed reduced, and then gradually increased in speed to reach a circumferential speed at which a suitable draw is formed between it and the feed roller 2, and The elapsed time during this time is the lap L when winding is performed at a constant speed and constant draw at the beginning of winding.
A winding control method for a spinning wrap machine, characterized in that the circumferential speed is maintained at the circumferential speed at which an appropriate draw is formed. 2. In a spinning wrap machine that provides a draw between the take-up roller 1 and the delivery roller 2 and performs surface winding by applying pressure, the spinning wrap machine is arranged coaxially and transmits rotation by a sun gear and a planetary gear. The first driving shaft 5 and the driven shaft 7 are provided with a second driving shaft 6 for causing the planetary gear to actively revolve around the sun gear. a differential gear device 3 in which a driven shaft 7 is connected to the shaft of the winding roller 1, respectively;
A start command is issued to the motor 4° connected to the second driving shaft 6 and the motor 4 at the same time as the start of winding, and after reaching a constant speed within a fixed time (to), this constant speed is After being held for a time (t2) and gradually decelerating during a fixed time (t3), a stop command is issued, and the elapsed time (1, +12+13) is set at a constant speed at the beginning of winding.
A winding control device comprising a control means for performing operational control to match the time when the wrap L exhibits a fluctuating state in which the gel gradually increases after the gel is gradually decreased when winding is performed while maintaining a constant draw.