JPS61138729A - Yarn connector in spinning frames - Google Patents

Abstract

PURPOSE:A detection roller which is supported with a movable block is pressed to the back roller and the sensor is operated by the lever set to the detection roller to reduce the flucuation of the length of the yarn connection part. CONSTITUTION:A detection roller 32 which is rotably supported with a movable block 36 on its top end is pressed to the back rollers 1, 1' on their peripheral surface and allowed to rotate in accordance with the back rollers. The sensor 12 for rotation detection 12 is operated by the lever 39 set to the detection roller 32 to measure the time from the signal start and to allow a seed yarn to overlap on the yarn after a cetrain time and The connected yarn is fed to the twister.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a splicing g1 position in a spinning device.

More specifically, the present invention relates to a splicing device in a spinning device such as a bundled spinning device or an open-end 1FJIJI device that heats a fiber bundle using an air flow.

Hereinafter, the present invention will be explained in detail regarding the binding spinning device.

Prior Art As a yarn splicing method in a binding spinning device that heats a tltM bundle using an air heating nozzle, the applicant of the present application reversely feeds the yarn end on the package side through the air heating nozzle, and connects the top and bottom aprons of the draft device. First, let's talk about how to separate the darkness, overlap it with the tip of the fiber bundle between them, and send it to the heating device! ! ! (Japanese Unexamined Patent Publication No. 59-59925J)
! Public bulletin).

In such a binding spinning device, the back roller is connected to a drive shaft via an electromagnetic clutch. When splicing yarn, the timing of each part's operation is important. For this purpose, the inventor considered starting a timer using a rotation start signal of the back roller to determine the timing of yarn splicing.

811 Points to be Solved by the Invention However, from the time when the back roller rotation start signal is turned on until the back roller actually rotates and sends out the fiber bundle,
Time fluctuations occurred due to reasons such as variations in the rotation start signal, variations until the clutch is activated by the rotation start signal, variations due to backlash of the drive gear, and variations due to the meshing position of the hinge latch.

Therefore, when carrying out the yarn splicing method using the previously proposed method in such a binding and spinning device, the time from when the back roller rotation start signal is turned on until the back roller actually rotates and sends out the II bundle is There is a time fluctuation, and this time fluctuation is about 75 m5ec in actual measurement. 4! A draft is applied between the back roller and the front roller, and the 16
It has been stretched 0 to 180 times, and as a result, 150
At a spinning speed of m/min, the yarn seam length varies by about 200+ne.

As a result of this variation in the length of the yarn splice, if the length of the yarn splice is too short, the seed yarn and fiber bundle cannot overlap and the yarn splice fails, and if the length of the yarn splice is too short, the yarn splice will fail. If too much is used, the obtained spun yarn will have uneven thickness, etc., resulting in a problem that the quality of the package will deteriorate.

The present invention can actually detect the rotation of the back roller without being affected by the vibration of the machine in which the spinning II1 is installed, reduce fluctuations in the rotation system seam length, ensure yarn splicing, and create high-quality packages. It is an object of the present invention to provide a yarn splicing device for a spinning device that can manufacture yarns.

Means for Solving the Problems In the present invention, a rotating roller that is attached with a detection roller that is pressed against a back roller of a spinning device and detects the rotation of the back roller and a lever that operates a rotation detection sensor is coaxially rotated. A one-way biasing elastic body is engaged with the detection roller, a reverse biasing elastic body is engaged with the rotating roller, and a pin protruding from the side surface of the detection roller is engaged with the rotating roller. The above-mentioned problems are solved by the splicing device in the spinning machine.

Function: Instead of conventionally starting the feeding of m fibers after a predetermined time has elapsed from the back roller rotation start signal, in the present invention, the feeding of the m fibers is started after a predetermined period of time has elapsed from the back roller rotation start signal. The detection roller supported by the roller is pressed against the circumferential surface of the back bottom roller or back top roller to rotate the detection roller, and the sensor is actuated by a lever attached to the detection roller, so the rotation of the back roller is actually controlled. It is possible to detect the start of the process, and after a predetermined period of time has elapsed since the transmission of the detection signal, the seed yarn can be polymerized into 11 bundles and fed to the heating device.

Therefore, conventionally, there are variations in the rotation start signal that existed from the rotation start signal of the back roller until the back roller actually starts rotating, variations in the time until the clutch is activated by the rotation start signal, and backlash of the drive gear. It is possible to significantly reduce time fluctuations due to variations, variations due to clutch engagement position, and the like.

Furthermore, in the present invention, the detection roller is engaged with the elastic body for biasing in one direction, the rotation roller is engaged with the elastic body for biasing in the reverse direction, and the pin protruding from the side surface of the detection roller is engaged with the rotation roller. By appropriately selecting the spring coefficients of both elastic bodies, it is possible to reliably detect the rotation of the back roller without being affected by the vibration of the machine base. The effects of reversal can also be removed.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the drawings, which illustrate preferred embodiments of the invention.

FIG. 1 is a side view showing a binding spinning device using a yarn splicing device according to the present invention. In FIG. 1, the draft device includes a pair of back rollers 1.1' and a middle apron 2.2. ', and a front roller 3.3'. An air heating nozzle 4 is provided downstream of the front roller 3.3' and in the vicinity of the front roller 3.3'.

The front top roller 3' of the draft device is configured to be able to press and separate the front bottom roller 3 by a known pressure means (not shown).

As shown in FIG. 2, the back roller is composed of a set of two spindles, and can be driven one spindle at a time. back bottom roller 1
A driven gear 18 is integrally attached to a back bottom roller shaft 15 provided with.

All the spindles have a back bottom roller drive shaft 191Q in common, and a drive gear 21 rotatably supported on a shaft 22 is meshed with the back bottom roller drive shaft 19. Drive gear 2
A large number of pawls 23 constituting a dog clutch are provided protrudingly on both sides of the driven gear 1, and furthermore, on both outer sides of the drive gear 21, the driven gear 1
A transmission gear 24 that transmits rotation to the shaft 8 is supported rotatably and movably in the axial direction. On one side of the transmission gear 24,
A pawl 25 that engages with a pawl 23 provided on the drive wheel 21 is provided protrudingly, and a pawl 27 that engages with a pawl flange 26 of a brake member fixed to the frame is provided on the other side.

A coil spring 30 biases the transmission wheel 24 to engage the pawls 23, 25 of the dog clutch with each other.

An electromagnetic solenoid 31 is built inside the claw flange 26, and when the electromagnetic solenoid 31 is energized, the clutch is disconnected and the transmission gear 24 is attracted and held on the claw flange 26 side. Note that the electromagnetic solenoid 31 is energized based on a signal from a thread breakage detector or an abnormality detector.

The air heating nozzle 4 can assume the normal operating position shown in FIG. 1 and a splicing position deviated from this position.

The yarn splicing device according to the present invention will be explained with reference to FIGS. 4 to 7. An air cylinder 46 is provided at the yarn splice R4B via a bracket 45, and a block 36 is attached to the tip of the piston rod 37 of the air cylinder 46.

As shown in FIG. 5, a pair of side plates 4 are provided on both sides of the block 36.
3a and 43b are attached, and the shaft 33 is hung around the tips of the side plates 43a and 43t). A large-diameter detection roller 32 and a rotating roller 538 smaller in diameter than the detection roller 32 are rotatably supported on the shaft 33 via bearings.

As shown in FIG. 6, a dogleg-shaped notch 32a is formed on the circumferential surface of the detection roller 32, and an L-shaped leaf spring 35 attached to a block 36 is engaged with the notch 32a. Let me,
The detection roller 32 is biased clockwise.

Similarly, a dogleg-shaped notch 38a is formed on the circumferential surface of the rotating roller 38, as shown in FIG.
An L-shaped leaf spring 41 attached to the notch 38a is engaged with the notch 38a to urge the rotary roller 38 in the opposite direction to the detection roller 32.

The above-mentioned L-shaped leaf springs 35 and 41 are the unidirectional biasing elastic bodies of the present invention.

A pin 34 protruding from the side surface of the detection roller 32 can be engaged with a notch 38b of the rotation roller 38, so that the rotation of the detection roller 32 is transmitted to the rotation roller 38 via the pin 34. Furthermore, the spring coefficient of the leaf spring 35 that biases the detection row 532 is selected to be smaller than the spring coefficient of the leaf spring 41 that biases the rotary roller 38.
And the rotating roller 38 is biased in the biasing direction of the leaf spring 41.

A lever 39 is attached to the side surface of the rotating roller 38, and when the lever 39 rotates, light l! A rotation detection sensor 12 composed of a device, a proximity switch, etc. is activated. In FIG. 7, the sensor 12 is a photoelectric device, and the optical axis position of the photoelectric device 12 is indicated by reference numeral 12a.

A stopper 40 is attached to the side plate 43t) to regulate the position of the rotation end of the lever 39.

During steady operation, the ll111 bundle (fleece) F is drafted to a predetermined magnification by a draft device consisting of a back roller 1.1', a middle apron 2.2', and a front roller 3.3' to form a ribbon-like fiber bundle. , the fiber bundle F is heated and untwisted by the air heating nozzle 4 to produce a bundled spun yarn Y, and as shown in FIG.
It passes through a winding drum 8 and is wound up as a package P onto a boppin B supported on a cradle arm 9.

When the spun yarn Y breaks during spinning, a mechanism (not shown) that pushes up the cradle arm 9 supporting the package P is used.
to separate the package P from the winding drum 8. On the other hand, in the draft mechanism, the electromagnetic solenoid 31 (Fig. 2) is energized to attract the transmission gear 24 toward the pawl flange 26 side and brake the back roller 1.1 of the draft mechanism.
′ is immediately stopped, the other rollers continue to rotate,
amm bundle back row 51.1' and middle roller 2
．． Cut between 2'.

Next, the yarn splicing machine is stopped in front of the yarn cutting weight, and the package P is attached to the package P by operating the yarn end pickup mechanism (not shown) while reversing the package drive roller (not shown) mounted on the yarn splicing machine. Pull out the wound end of the thread,
It is gripped by a piecing roller (not shown), and the piecing roller is positioned immediately downstream (directly above) the final outlet of the air heating nozzle 4.

Next, the air heating nozzle 4 is moved together with the beesing roller in the axial direction of the roller 3.3' to remove it from the yarn path during steady operation. Therefore, below the air heating nozzle 4,
In other words, a space is created on the entrance side. Through this space, a yarn end suction means (not shown) having a known structure is positioned close to the inlet side of the air heating nozzle 4 to perform suction operation. Then, the end of the yarn formed on the package P can be smoothly led out from the final outlet of the air heating nozzle 4 toward the inlet of the air heating nozzle 4.

After the yarn end is led out to the inlet of the air heating nozzle 4, the yarn end suction means is retreated from the air heating nozzle 4.

Next, the air heating nozzle 4 is returned to the normal operating position, and the yarn end suction means is positioned below the front top roller 3'.

In this state, a back roller rotation start signal is sent, and first the clutch of the back roller 1.1' is engaged to start rotation, and the fiber bundle F is advanced to the action area of the middle apron 2.2', and further to the front row 53. .3'.

Before the fiber bundle F reaches the front roller 3.3', the package P placed above the air heating nozzle 4 is first rotated in the forward direction to advance the yarn end in the yarn end suction tube through the air heating nozzle 4.

At the same time or a little later, the front top roller 3
’ lever to lower the front top row 5
3' is pressed by the front bottom roller 3, the yarn end is gripped by the front row, and is actively sent to the air heating nozzle 4, and the yarn end passing through the air heating nozzle 4 is adjusted to a predetermined tension. .

Furthermore, at the same time or with a slight delay, air is injected into the air heating nozzle 4 to generate a swirling flow, and the front roller 3.3
A seam is formed between the yarn ends of the overlapping seed yarns and the fiber bundle F at the ' section, and the ribs are made. Therefore, when splicing yarn, the timing of operation of each part is important, especially the timing of feeding the *m bundle by the back roller and the timing of superposition of the fiber bundle and seed yarn in the front roller part.

Conventionally, in order to achieve this activation timing, a timer starts counting with a rotation start signal of the back roller, and after a predetermined time, the lever of the front top roller 3' is operated to lower the front top roller 3' and the front bottom roller 3.・The fiber bundle that was polymerized with the seed yarn was fed by pressing the fiber bundle.

However, Fig. 3 (
As shown in ii), from when the back roller rotation start signal is turned on until the back roller actually rotates and sends out the fiber bundle, t, ,t,',1+",tI"" There is a time variation.

As a result of analyzing the causes of the above-mentioned temporal fluctuations, we found that various temporal fluctuations occur due to various factors as described below.

■ Electrical variations in the transmission timing of the rotation start signal, variations in the timing from when the rotation start signal is transmitted until the electromagnetic solenoid 30 (Fig. 2) is energized and the clutch is mechanically activated, and the drive gear 24.18 m! Time fluctuations (i+~t1',
That is, t2' to t2), ■For the same reason as described in ■ above, when the back roller is normal, lI! Time fluctuation due to starting rotation later than t +, ■ When the clutch is disengaged, as shown in Figure 8 (a),
When the engaging pawl 25 on the driven shaft side is positioned slightly on the advancing side (upper in the figure) with respect to the pawl 23 on the driving shaft side and stops,
When the pawl 25 moves to the right and hits the pawl 23 during the next engagement, the pawl 25 moves to the right and hits the pawl 23.
5 is pushed upwards. Therefore, the driven wheel begins to rotate in the forward direction (in the direction of the arrow) before the pawls 23,25 are fully engaged. As a result, the time fluctuation (1+ ~
t1''', that is, t2~tz''), ■ When the clutch is disengaged, as shown in Fig. 8 (0),
When the engagement pawl 25 on the driven shaft side is positioned slightly behind the pawl 23 on the drive shaft side (lower in the figure) and stops,
At the time of the next atonement, when the claw 25 moves to the right and hits the claw 23, the claw 25 moves to the right and hits the claw 23.
5 is pushed downward. Therefore, before the pawls 23, 25 are fully engaged, the driven wheel side temporarily rotates in the opposite direction and then begins to rotate in the forward direction (in the direction of the arrow). As a result, when the start of forward rotation of the back roller is the stop layer, M t +
(j+~t
1'', that is, t2 to t2'').Furthermore, the above-mentioned time fluctuations from (1) to (2) overlap, resulting in even larger time fluctuations.

The time fluctuation from when the back roller rotation start signal is turned on until the back roller actually rotates and sends out the 8M bundle is an actual measured value of about 75 m 5130.

The Il fibers are connected to the back roller 1.1' and the front roller 3.
A draft occurs between 3I and the yarn is stretched 160 to 180 times.As a result, the yarn splice length fluctuates by approximately 20,011 mm at a spinning speed of 150 m/min, causing yarn splicing errors and package failure. There is a problem that quality deteriorates.

Conventionally, the feeding of the fiber bundle polymerized with the seed yarn was started after a predetermined period of time had elapsed from the rotation start signal of the back roller, so the rotation of the back roller itself coincided with the rotation start signal. In view of the fact that the above-mentioned problem occurs due to the lack of rotation, in this embodiment, instead of the conventional back roller rotation start signal, the rotation angle of the back roller is measured and the i! It directly detects that the back roller has actually started rotating by the I start signal, and after rotating by a predetermined angle (
After passing through flit Il for a predetermined time from the start of the rotation, the seed yarn and fiber bundle are polymerized, and feeding of the polymerized seed yarn and 18H bundle to the heating device is started.

That is, before the back roller 1.1' rotates, the leaf spring 4
1, the lever 39 is pressed against the stopper 40,
The sensor 12 detects the lever 41 (solid line position in FIG. 7). When the back roller 1.1' rotates, the detection row 532 pressed against the circumferential surface of the back top roller 1'
Rotates in the direction of the arrow in the figure. The rotation of the detection 0-532 is transmitted from the pin 34 to the rotary roller 38 through the end of the notch 38b of the rotary roller 38, and the rotary roller 38 is transmitted to the rotary roller 38 by the leaf spring 4.
The lever 39 rotates in the direction of the arrow in FIG. 7 against the biasing force of the back roller 1.1, and the lever 39 moves out of the detection area of the sensor 12, thereby making it possible to detect that the back roller 1.1' has rotated.

After detecting that the back roller 3.3' has actually started rotating as described above, the timer starts measuring time as shown in Figure 3 (b), and when a predetermined set time T has elapsed. , operate the lever of the front top row 53' to lower it, press the front top roller 3' against the front bottom roller 3, and move the yarn end to the front roller 3.3.
', the seed yarn and the fiber bundle are polymerized and actively sent to the air heating nozzle 4 into the air heating nozzle 4.

Air is injected to generate a swirling flow to form a seam between the yarn end of the seed yarn and the fiber bundle F, and the fiber bundle F is spliced.

In the present invention, the detection roller 32 and the rotating roller 38 are each urged in opposite directions by elastic bodies (plate springs 35, 41), and both rollers 32, 38 are elastically connected by a pin, so that the Vibration and drive of the stand - car 24.181
It is possible to detect minute rotation (rotation less than a predetermined angle) of the detection row 532 due to backlash of 1I and prevent malfunction.

Furthermore, in the present invention, the detection roller 32 and the rotation roller 38 are each biased in opposite directions by elastic bodies (plate springs 35, 41), so that the detection roller 32 is allowed to rotate in opposite directions to some extent. Therefore, even when the pawl 25 of the driven wheel is pushed back in the reverse direction by the pawl 23 on the driving side when the clutch is engaged and then rotates forward, the back roller 3.
Detection can only be made after 3' rotates reliably.

Effects of the Invention According to the present invention, variations in the rotation start signal from the rotation start signal of the back roller until the rotation of the back roller actually starts, variations in the time until the clutch is activated by the rotation start signal, and variations in the drive gear. As an example, it is possible to significantly reduce time fluctuations due to backlash, fluctuations due to clutch engagement position, etc.
(The conventional 75m5ec can be reduced to 10m5ec), the length of the yarn splicing section can be made uniform, and the yarn splicing failure that occurs when the seed yarn and fiber bundle cannot overlap due to the length of the yarn splicing section can be made uniform. Since unevenness in thickness, etc., which occurs when the length of the yarn splicing part is too long, does not occur, the success rate of yarn splicing is extremely high, and spun yarn packages of good quality can be manufactured.

Furthermore, according to the present invention, since it is detected that the back roller has rotated by a certain angle, there is no possibility of malfunction due to abnormal rotation of the back roller being detected when the clutch is engaged.

Furthermore, by selecting a predetermined rotation angle of the back roller detected by the device of the present invention to be large to some extent, it is possible to prevent malfunctions due to vibrations of the machine base.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a binding spinning device using the device of the present invention, FIG. 2 is a front view of the back roller drive section of FIG. 1, and FIG.
Figure (a) is a diagram showing the yarn splicing timing according to the conventional method, Figure 3 (b) is a diagram showing the yarn splicing timing according to the method using the device of the present invention, and Figures 4 to 7 are diagrams showing the yarn splicing timing according to the method using the present invention device. 4 is a side view, FIG. 5 is a plan view, FIG. 6 is a sectional view taken along line AA in FIG. 5, FIG. 7 is a sectional view taken along line 8-8 in FIG. 5, and FIG. (A) and (B) are partial front views illustrating the state in which the clutch shown in FIG. 2 is disengaged. 1.1'...back roller', 2.2'...middle apron, 3.3'...front roller, 4...air heating nozzle 12...rotation detection sensor, 32... Detection roller, 32a...notch, 34...
・Pin, 35.41... Leaf spring, 38...
Rotating roller, 38a138b...notch, 39...
lever,

Claims (1)

[Claims] 1. A detection roller that is pressed by a back roller of a spinning device and detects the rotation of the back roller, and a rotating roller equipped with a lever that operates a rotation detection sensor are coaxially rotatably supported, and attached to the detection roller in one direction. A yarn in a spinning device characterized in that a biasing elastic body is engaged with a rotating roller, a reverse biasing elastic body is engaged with a rotating roller, and a pin protruding from a side surface of a detection roller is engaged with a rotating roller. splicing device.