JPS59137518A - Apparatus for controlling ratio of rotation speeds of draft rollers, etc. in spinning machinery - Google Patents

Abstract

PURPOSE:To provide the titled apparatus capable of easily changing the preset level of the rotation speed ratio of a spindle and plural draft rollers, etc., and constantly keeping the preset rotation speed ratio, by carrying out the control of the ratio with an stepless transmission gear. CONSTITUTION:The transmission ratio of each stepless transmission gear 17, 18, 19 is controlled by each servo motor 22, 25, 28. When a presetting signal is inputted to the control circuit 21 externally by the operation of a button, etc., the transmission ratio of the stepless transmission gear 17 is increased or reduced according to the presetting signal, and the rotation speed ratio of the front roller 5 to the driving shaft 7 is changed. In the same manner, the stepless transmission gear 18 changes the rotation speed ratio of the back roller 1 to the front roller 5, and the gear 19 changes the ratio of the back roller 1 to the middle roller 3.

Description

Detailed Description of the Invention Technical Field The present invention 1 is a spinning machine such as a roving frame or a spinning frame in which a sliver is drawn by a plurality of draft rollers having different rotation speeds and wound onto a bobbin attached to a spindle while being twisted. , relates to a machine for controlling the rotational speed ratio of the spindle, a plurality of draft rollers, etc.

Prior Art Generally, in spinning machines, slivers and rovings are the first
As shown in the figure, between the back bottom roller 1 and the back top roller 1- which is in pressure contact with the same roller 1, and between the middle bottom roller 3 which is rotated faster than the back roller 1 and the back top roller 1- which is in pressure contact with the same mouth roller 3. It is passed between the front bottom roller 5, which rotates faster than the middle roller 3, and the front top roller 5', which is pressed against the middle roller 5. In the draft roller mechanism consisting of these rollers, the sliver is drawn by the difference in the rotational speed of the rollers 1, 3, and 5, and the sliver drawn through the front roller 5 is twisted while being twisted by a drive motor connected to a drive motor (not shown). It is wound onto a bobbin (path shown) mounted on a spindle 10 that is rotated via a shaft 7, a pulley 8 fixed to the coaxial shaft 7, and a drive tape 9.

Now, the spinning conditions according to the desired yarn count or fiber type, etc. are the rotation speed ratio between each draft roller 1, 3.5, which determines the drawing state of the sliver, and the front roller 5, which determines the number of twists. It is determined by the rotation speed ratio with the drive shaft 7. Conventionally, each draft roller 1', 3.5 has obtained its driving force from a drive shaft 7 via a gear mechanism, as shown in FIG. Therefore, when changing the spinning conditions, the first
In the example shown in the figure, a change gear 11 for changing the rotation ratio between the front row 55 and the drive shaft 7, a change gear 12 for changing the rotation speed ratio between the back roller 1 and the front roller 5, or the back row 51 and the middle roller It is necessary to replace the change gear 13, which changes the rotation speed ratio with 3, as appropriate. However, this work is extremely troublesome, and there is also the drawback that many types of change gears must be prepared for this purpose.

Purpose The present invention has been made in consideration of the above facts,
The purpose is to be able to easily change the rotation speed ratio of the spindle and multiple draft rollers in the spinning machine.
A further object of the present invention is to provide a control device that can maintain this set rotational speed ratio at all times.

Embodiment Hereinafter, an embodiment embodying the first invention will be described with reference to FIG. 2. The same parts as those in the conventional structure are designated by the same reference numerals, and detailed explanation thereof will be omitted.

Now, the rotational force of the drive shaft 7 is transmitted to the front roller 5 via a power transmission mechanism including a timing pulley 14, a timing belt 15, and a speed reduction mechanism 16, and a continuously variable transmission 117. Similarly, the rotational force transmitted to the front roller 5 is transmitted through a power transmission mechanism consisting of a timing pulley 14, a timing belt 15, and a speed reduction mechanism 16, and a continuously variable speed II.
8 to the back roller 1, and further transmitted to the middle roller 3 via a power transmission mechanism consisting of a timing pulley 14 and a timing belt 15 and a continuously variable transmission 119.

The gear ratio of each continuously variable transmission 17, 18.19 is controlled by a servo motor 22.25.2 provided corresponding to each transmission.
The operation is changed by 8. And each servo motor 22
．． J5.28 are operated based on operating commands from control circuits 21.24.27 provided corresponding to the respective servo motors. Each control circuit 21, 2
4.27 both send a forward rotation or reverse rotation operation command to the servo motor when a setting signal is input from the outside through a button device or the like, and increase or decrease the gear ratio of the continuously variable transmission 11117.18.19. It has become.

Now, when a setting signal is input to the control circuit 21 from the outside by button operation or the like, the gear ratio of the continuously variable transmission 17 is changed to increase or decrease in accordance with the setting signal, and the front row 55 and drive shaft The rotation speed ratio with 7 is changed. Similarly, the continuously variable transmission 18 changes the rotational speed ratio between the back roller 1 and the front roller 5, and the continuously variable transmission 19 changes the rotational speed ratio between the back roller 1 and the middle roller 3.

In this way, in this embodiment, the control circuits 21 and 24 are controlled from outside.
Alternatively, the rotational speed ratio between each draft roller 1, 3.5 and the drive shaft 7 can be easily changed by simply inputting a setting signal to 27 according to desired spinning conditions.

In this embodiment, the gear ratio adjustment of the continuously variable transmission is performed by a control device consisting of a control circuit and a servo motor, but the control device is omitted and the gear ratio adjustment lever of the continuously variable transmission is used instead. It is also possible to adjust the gear ratio of the transmission by manually installing the same. Also, the drive shaft 7
The rotational force is transmitted to the front roller 5. Back roller 1.
The order is not limited to middle row 53, back roller 1, front roller 5. middle roller 3, or front roller 5. Middle roller 3. Back roller 1
It is also possible to take the order of Further, the power transmission mechanism is not limited to using the timing belt 15, and instead of the belt 15, a gear mechanism, a chain wheel, etc. may be used.

Incidentally, the stretching state of the sliver is determined by the rotational speed ratio of the back roller 1 and the front roller 5. Therefore,
Generally, the rotational speed ratio between the back row 51 and the front roller 5 is changed frequently, but the rotational speed ratio between the back roller 1 and the middle roller 3 is changed less often. Therefore, instead of using the continuously variable transmission 19, the setting of the rotation speed ratio between the back roller 1 and the middle roller 3 may be changed by replacing the change gear of the gear mechanism as in the conventional case. Alternatively, it is also possible to change only the rotational speed ratio between the back roller 1 and the front row 55 using a continuously variable transmission.

In addition, in ring spinning machines etc., the ring plate obtains its driving force from the drive shaft 7 without passing through the draft roller 1.3.5, but the ring plate determines the pitch of the yarn wound on the bobbin. The elevation speed can also be changed in the same way using a continuously variable transmission.

Next, an embodiment embodying the second invention will be described based on FIG. 3. This embodiment detects the rotation speeds of the input shaft side and output shaft side of a continuously variable transmission, and calculates the ratio of both rotation speeds and a preset rotation speed ratio between the input shaft side and output shaft side. In comparison, this embodiment differs from the embodiment of the first invention in that a feedback device is provided to control the gear ratio of the continuously variable transmission.

Therefore, the gear ratio control of the continuously variable transmission 17 will be explained.

A magnetic or optical rotation speed detection device 29 that detects the rotation speed of the drive shaft 7 has a pulse count of 81 per rotation of the drive shaft 7.
The rotational speed detection device 30 that detects the rotational speed of the front roller 5 generates 82 pulses per rotation of the front roller 5. Therefore, the number of rotations per unit time of the drive shaft 7 is N1
, if the number of rotations per unit time of the front roller 5 is N2, then the detection device 29 detects al·Nl (=P
1), the detection device 30 detects a2·N2 (=P2
) emits a number of pulses. Assuming that a setting signal indicating the set ratio K of the rotation speed of the drive shaft 7 to one rotation speed of the front roller 5 (that is, the rotation speed ratio of the drive shaft 7 and the 70 controller 5) is input to the control circuit 20. Same circuit 20
is the number of pulses P2=82-N2 and (1/K)-a 2
/a 1-Pl-<1/K)-a 2-N1 (=P1
-), P1=>P2 or N1/N2>K
Then, in order to decrease the gear ratio of the continuously variable transmission 17, an operation command is sent to the servo motor 22, and P1=<:P2, that is, N
- If 1/N2<K, send an operation command to the servo motor 22 to increase the gear ratio of continuously variable transmission +1117.

Similar filters are applied to continuously variable transmissions 18 and 19.
- Dopuck control is performed. Feedback control in the continuously variable transmission 18 is performed based on a signal from the rotation speed control device 31, and feedback control in the continuously variable transmission 19 is performed by detecting the rotation speed of the rotation speed control device 31 and the middle roller 3. This is done based on a signal from the device 32.

In this way, by performing feedback control in this embodiment, the rotation speed ratio between the draft roller 1.3.5 and the drive shaft 7 is always maintained at the set rotation speed ratio, and stable spinning conditions are obtained. It will be done.

In addition, in this embodiment, as in the embodiment of the first invention, only the rotational speed ratio of the back roller 1 and the front roller 5 is controlled by the continuously variable transmission 18, or the ascending and descending speed of the ring rail is controlled. The present invention may be implemented when controlling.

Effects As detailed above, in the first invention, the rotation speed ratio of the spindle, the plurality of draft rollers, etc. is controlled by a continuously variable transmission, so that the setting of the same rotation speed ratio can be easily changed. Moreover, in the second aspect of the invention, the rotation speed ratio can be always maintained at a predetermined value by controlling the rotation speed ratio by the continuously variable transmission. Recently, spinning mills have been required to produce a wide variety of products in small quantities, and the rotation speed ratio of draft rollers, etc. has to be changed frequently, but the present invention allows such changes to be made immediately, contributing to the rationalization of spinning mills. It's something you get.

[Brief explanation of drawings]

Figure 1 is a road diagram showing a conventional drive system such as a spindle and draft roller, Figure 2 is a road diagram showing an embodiment embodying the first invention, and Figure 3 is an embodiment of the second invention. It is a road body diagram showing one example. Back roller 1, middle roller 3, front roller 5,
Drive shaft 7, spindle 10, continuously variable transmission 17, 18, 1
9. Control circuit as control means 20.21.23.24
．． 26, 27, servo motor as control means 22.2
5.28, Rotation speed detection device 29.30, 31, 32° Patent applicant Toyota Industries Corporation Type Attorney Patent attorney On 1) Bosensha 1 diagram

Claims (1)

[Claims] 1. A spindle, a plurality of draft rollers, etc. are operatively connected to each other, and the rotation speed ratio between the input side and the output side of the connection is set for at least one of the operative connection parts. A rotation speed ratio control device for a draft roller or the like in a spinning machine, characterized in that it is provided with a continuously variable transmission for changing the rotation speed ratio. 2. A stepless mechanism for operatively connecting a spindle, a plurality of draft rollers, etc. to each other, and changing the setting of the rotation speed ratio between the input side and the output side of the connection at at least one point of the operative connection. A transmission is provided, a rotation speed detection device is provided on the input shaft side and the output shaft side of the transmission, and the ratio of the rotation speed detected by the rain detection device and the preset ratio between the input shaft side and the output shaft side are determined. A rotation speed ratio control device for a draft roller or the like in a spinning machine, characterized in that a control means is provided for changing the gear ratio of the continuously variable transmission by comparing the rotation speed ratio with a set rotation speed ratio.