JPS6127978Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a false-twisting unit in a belt-type false-twisting device having a vibration prevention device.

As shown in Fig. 1, two adjacent endless belts 1 and 2 intersect with each other and run in opposite directions.
It is a belt-type false twisting device that nip yarn to give a false twist between the yarns, and the endless belts 1 and 2 transmit driving force from separately provided drive endless belts 3 and 4 via touch rollers 7. Belt-type false-twisting devices are known which operate in a controlled manner.

In such a belt-type false twisting device, in order to nip the yarn at the belt intersection, the swing arm of the false twist unit that supports one belt is biased by a spring, and the thread is freely moved around the boss of the swing arm. It is configured to rotate. As a result, as the belt runs, natural vibrations occur in the swing arm, and the nip pressure of the belt changes. Experiments have shown that as the yarn speed increases, the amplitude of vibration increases, and when the yarn speed exceeds 800 m/min, the amplitude reaches 0.5 mm, and the belt nip pressure fluctuates greatly, causing fluctuations in yarn tension and number of twists. had an extremely large influence.

Furthermore, since the nip pressure is set by individually adjusting the biasing force of a spring provided in each false twisting unit, this also causes slight differences in the quality of the processed yarn produced.

This idea was made in order to eliminate the drawbacks seen in conventional devices.The nip pressure of the false twisting unit is applied by a fluid cylinder, and the damper effect of the fluid cylinder is used to dampen the vibration of the swing arm. This is to suppress the nip pressure and adjust the nip pressure.

The false twisting unit equipped with the vibration prevention device of the present invention will be described below. Referring to FIGS. shaped bearing sleeve 1
This swing arm 10 is made up of an arm part 10a and a boss part 10b, and the drive shaft 14 of the drive pulley 13 is rotatably inserted into the boss part 10b. has been done. 1
5 and 16 are bearings located in the upper and lower parts of the bearing sleeve, and the upper bearing 1
5 and the lower bearing 16, there is a flange 1
7 and 18 are spaced apart from each other and the boss portion 10 of the rotating arm 10
extending from b and between the flanges 17 and 18,
On a vertical cross section of the swing arm 10 including the axis of the arm part 10a, and on the opposite side to the extension side of the arm part 10a, an upper end and a lower end are located at intermediate positions between the outer line of the flange and the boss part 10b of the swing arm. A pin 19 is fixed to the flange, and the upper and lower ends are fixed to the flange at a position concentric with the pin 19 and 90 degrees counterclockwise in FIG. A pin 20 is provided respectively.

Further, the arm portion 10a of the swing arm 10 includes an arm portion 1.
A driven shaft 23 of a driven pulley 22 is supported via a slider 21 that moves in the longitudinal direction within 0a,
An endless belt 24 is stretched between the drive pulley 13 and the drive pulley 13. 25 is an adjustment knob of the slider 21, and 26 is formed at the end of the slider 21.
This is a slider guide that guides the slider 21 by engaging with the fork-shaped portion 27.

The vibration prevention device of the present invention is constructed to be built into the mounting board 11 of the false twisting unit, and the connecting member 28 is connected to the fluid cylinder 29, and the piston rod 30 of the fluid cylinder 29 is inserted between the flanges 17 and 18. The pin 19 extends and its concave tip tangentially engages the pin 20 on the flange, while the pin 19 is loosely fitted into a notch provided in the side surface of the tip of the rod 32 extending in the tangential direction. The base of the rod 31 has a spring 33 which is fixed at one end to the mounting board 11 and at the other end to the protrusion 32 of the rod 31.
The rod 35 extends perpendicularly to the rod 31 and is pressed against the eccentric rod portion at the tip of the rod 35 which is rotated by the knob 34.

Note that, on the lower side of the bearing sleeve 12, there is a rotating shaft support arm of the touch roller, a transmission mechanism that transmits the rotation of the touch roller to the drive shaft of the drive pulley,
A control device for controlling contact and separation between the touch roller and the drive belt is provided, but its detailed configuration is not directly related to the present invention, and therefore illustration and description thereof will be omitted.

Since the false twisting unit of this invention is constructed as described above, the fluid cylinder 29 is energized by fluid pressure such as oil or water, and the piston rod 3
0 extends and presses the pin 20, so the rotating arm 1
0 rotates clockwise (in the direction of arrow A), and the pressing force between the endless belt 24 stretched between the driving pulley 13 and the driven pulley 22 and the endless belt of the other false twisting unit, that is, the nip of the yarn. Also, if it is necessary to stop a specific false twisting unit due to yarn breakage during operation, a yarn breakage detection device (not shown) detects the breakage of the yarn, and a signal is sent to the electromagnetic valve (not shown). ) to stop the fluid supply, notify the employee using an indicator light, etc., and the worker turns the knob 34 to stop the fluid supply.
When the eccentric rod portion 36 at the tip is rotated, the biasing force of the spring 33 acts on the rod 31 to engage the pin 19 loosely fitted into the notch of the rod.
Since the rotating arm 10 is rotated counterclockwise (in the direction opposite to the direction of arrow A), the nip pressure is released and the endless belts of the false twisting unit are separated from each other.

Therefore, the belt-type false twisting device having the vibration prevention device of the present invention utilizes the damper effect produced by the operation of the fluid cylinder 29 to prevent changes in nip pressure caused by the vibration of the false twisting unit, and always twists the yarn at a constant pressure. You can nip.

Furthermore, the pack pressure of the fluid supplied to the fluid cylinder of each false-twisting unit can be kept constant by connecting the main pipe (not shown) to the connecting pipe 28 of each false-twisting unit. The nip pressure of all false twisting units can be adjusted and maintained at a constant level, which has many effects on improving and homogenizing the quality of processed yarn.

In the above explanation, when the thread breaks during operation, the worker who recognizes the notification applies the biasing force of the spring by turning the knob 34,
As described above, the endless belts of the pair of false twisting units are separated from each other, but the signal emitted from the yarn breakage detection device is transmitted to the electromagnetic valve to stop the fluid supply, and the signal is also used to automatically stop the fluid supply. It goes without saying that the endless belts may be separated instantly by applying the biasing force of the spring to the rod.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the structure of a belt-type false twisting device, and FIG. 2 is a plan view of the false twisting unit of the present invention.
3 is a view taken along the line in FIG. 2, FIG. 4 is a cross-sectional view taken in FIG. 3, and FIG.
It is a sectional view taken along the line - in the figure. 17, 18... flange, 19, 20... pin, 28... connecting pipe, 29... fluid cylinder,
30... Piston rod, 31... Rod, 33
...Spring, 36...Eccentric rod part.

Claims (1)

[Scope of utility model registration request] A temporary rotating arm is provided on the mounting board so as to be able to freely rotate about the axis of the driving pulley, and an endless belt is stretched between the driving pulley on the axis and the driven pulley supported by the slider on the rotating arm. A pair of twisting units are arranged close to each other so that the endless belts are in cross contact with each other and move in opposite directions, and the yarn is nipped between the endless belts to give a false twist. The twisting device includes a vibration prevention device that engages the tip of the piston rod of the fluid cylinder with a pin provided at the lower end of the pivot arm boss, and presses the pin with the pressure of the fluid cylinder to rotate the pivot arm. A false twisting unit in a belt type false twisting device having a vibration prevention device.