JPH0627383B2 - Yarn supply device for spun yarn manufacturing equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a yarn supplying device in a spun yarn manufacturing device or the like.

[Conventional technology]

For example, in a core yarn manufacturing apparatus in which a draft device and an air jet nozzle are arranged in order, a processed yarn such as a polyester filament is supplied in the middle of a fiber bundle passing through the draft device and the air jet nozzle.

Therefore, the supply, stop, and cutting of the above-mentioned processed yarn must be performed in synchronization with the supply, stop, and cutting of the fiber bundle, but the fiber bundle such as the sliver and the filament processed yarn are supplied by the same supply device. Since it cannot be stopped, the manufacturing device is provided with a supply device for the processed yarn.

This supply device needs the functions of supplying, stopping and cutting the thread, and for cutting the thread, for example, a cutter is prepared, and for supplying the thread, for example, a guide tube for guiding the thread by an air flow is used. To be

By the way, the yarn introduction and supply operation by the guide tube and the yarn cutting operation by the cutter are good when the yarn is cut while the airflow is flowing in the guide tube, that is, while the yarn is running. Therefore, it is desirable that the operation timings of the both are synchronized so that the two operations do not overlap, because there is a risk that the cut yarn ends may jump out in an unexpected direction due to the air flow.

[Problems to be solved by the invention]

However, in the past, the timing was not controlled, and the arrangement and shape of the yarn guide tube and the cutter were devised to prevent the above-mentioned trouble, but between the yarn guide tube and the cutter. If the gap is provided, another problem occurs that the thread cannot be properly introduced into the cutter.

In addition, if an attempt is made to electrically control the timing, an appropriate electric circuit is naturally required, and an actuator for opening and closing the cutter and turning air on and off to the yarn guide tube is also included in the timing control circuit. You need a special fit.

An object of the present invention is to provide a yarn supplying device which can surely synchronize the above operation timing and smoothly stop the supply of the yarn without causing the above problems.

[Means for solving problems]

A yarn supply device according to the present invention includes a yarn cutting device, a yarn guide tube for sucking and introducing the yarn into the yarn cutting device, and an air cylinder for opening / closing operation of the yarn cutting device. The compressed air passage connected to the guide tube is connected to the compressed air chamber of the air cylinder on the side where the yarn cutting device is opened, and suction air is drawn into the yarn guide pipe by the compressed air flow after the yarn cutting device is opened. When the flow is generated and the yarn cutting device is switched to the closing operation, the supply path of the compressed air into the yarn guide tube is immediately cut off.

〔Example〕

An embodiment in which the yarn supplying device of the present invention is provided in a core yarn manufacturing device will be described below based on the rolling direction.

FIG. 5 is a perspective view of the core yarn manufacturing apparatus of this example. The pair of back rollers (1) and (2) and the apron belt (3) are arranged along the passage of the fiber bundle (S) such as a sliver.
A draft device unit (9) including a pair of middle rollers (5) and (6) having (4) and a pair of front rollers (7) and (8), and a fiber bundle drafted by the draft device unit (9) It is mainly composed of an air injection nozzle (10) for twisting the yarn and a winding section (11) for winding the spun yarn on a package (P).

Two nozzles having mutually opposite jetting directions are provided in the air jetting nozzle (10), and one nozzle imparts false twist to the drafted fiber bundle, and the other nozzle imparts false twisting. (7) A balloon is formed on the (8) side to generate unconstrained fibers on the twisted side of the false twist, and the unconstrained fibers are substantially parallel to the untwisted side of the false twist on the outer periphery of the core fiber. It is designed to produce wrapped, so called spun yarn.

Further, the draft device unit (9) includes a back roller (1).
The peripheral speed is increased in the order of (2), the middle rollers (5) and (6), and the front rollers (7) and (8), and the fiber bundle (S) is drafted by this peripheral speed difference.

The top side (1) (5) (7) of each draft roller is supported by the cradle (12), while the bottom side middle roller (6) and front roller (8) are line shafts, and The driving of the back roller (2) is stopped independently for each weight, and by the yarn defect signal or full winding signal from the yarn clearer (13) that detects defects such as yarn thickness, The driving of the bottom back roller (2) is stopped. The back roller (1)
Due to the stop of (2), the feeding of the fiber bundle (S) is stopped, and the spinning is stopped. (14) is a fiber bundle guide provided between the back rollers (1) and (2) and the middle rollers (5) and (6), and (1)
5) is a trumpet that guides the fiber bundle (S) to the back rollers (1) and (2), and (16) is an air injection nozzle (1)
It is a delivery roller that pulls out the yarn from 0).

In the core yarn manufacturing apparatus of this example, a fiber bundle such as a sliver is drafted, twisted and wound up as a spun yarn as described above, and when the production is stopped, the rotation of the back rollers (1) and (2) is stopped. The feeding of fiber bundles has stopped,
When the production is restarted, the rotation of the back rollers (1) and (2) is restarted. However, on the side of the draft device unit (9), there is a device (17) for supplying a processed yarn such as polyester filament according to the present invention. This supply device (1
7) The processed yarn (F) is pulled out from the yarn supplying package (18), and the processed yarn (F) is guided between the apron belts (3) (4) and the front rollers (7) (8) through the guide pipe (19). ) Is to be supplied.

The supplied processed yarn (F) is a drafted fiber bundle (S)
It is introduced together with the air jet nozzle (10), and the processed yarn (F) is spun as a so-called core yarn (Y) that constitutes the core fiber at the substantially center and the fiber bundle (S) constitutes the fiber surrounding the outer periphery thereof. .

Next, the processing yarn supplying device (17) will be described.

As shown in FIGS. 1 and 2, the feeding device (17) of this example
Into the housing (20) due to the air flow
A yarn sending portion (21) for positively feeding the yarn in the direction of the arrow, and a yarn cutting gripping portion (22) for stopping the feeding of the processed yarn when the yarn is broken or fully wound in the spinning unit. An air cylinder (23) as an actuator of the thread cutting and gripping part (22), and two solenoid valves (24) (25) for controlling the on / off of compressed air to the air cylinder (23).
A tenser device (26) is provided outside the housing (20) to provide proper tension when the processed yarn (F) is fed.

That is, the yarn delivery section (21) has a slender guide tube (28) whose rear portion is formed by the mounting block (27) of the solenoid valve (24) (25) and a through hole (29) of the guide tube (28). ), A compressed air injection nozzle (30) for ejecting compressed air in the yarn traveling direction, and the nozzle (3
0) and a compressed air supply pipe (31) for supplying compressed air, and the yarn drawn from the package (18) is guided by the air flow ejected from the nozzle (30).
It is positively sent to the draft device section (9) through 9).

Then, a yarn cutting gripping portion (22) is provided continuously to the yarn sending portion (21).

That is, the thread cutting and gripping part (22) is a movable disc (32) which is vertically driven by an air cylinder (23) which will be described later in detail, and a fixed circle which is in close contact with the movable disc (32). From the plate (33) and the pressing member (34) that presses the two discs (32) (33) against the side surface of the valve mounting block (27) that is the rear end of the yarn delivery section (21). And the hole (3) formed in the center of the discs (32) (33)
5) (36) and the hole (37) penetrating the center of the pressing member (34), the movable disc (32) of the guide tube (28) when the movable disc (32) is in the raised position (the position shown in the first illustration). Through hole (2
9) is formed with a series of guide holes for a series of yarns. The movable disc (32) is an air cylinder (2
It is fixed to the plate member (39) connected to the rod (38) of 3) and moves up and down while being clamped between the mounting block (27) and the fixed disc (33) due to expansion and contraction of the cylinder (23). However, the hole (35) of the movable disk (32) and the hole (36) of the fixed disk (33) move downward in FIG. 1 by the stroke of the cylinder (23). In this case, the diameters of the holes (35) and (36) do not overlap with each other, and the inner surfaces of the holes (35) and (36) are tapered so that their sliding contact surfaces have a small diameter, and the movable disk (32) is at the stroke end. As it descends, the tapered hole (35)
The thread (F) is sandwiched and cut by the sliding contact surface side opening edges (35a) and (36a) of (36). (Fig. 3).

Further, the thread ends cut and cut are, as shown in the third illustration, the side surface of the mounting block (27) and the hole (35) of the movable disk (32).
Is sandwiched between the other opening edges (35b) of the
Since the hole (35) is tapered, between the other opening edge (35b) and the side surface of the mounting block (27),
The yarn end (Fa) is not cut and is reliably gripped by the pressing force of the pressing member (34).

The pressing member (34) includes a cap member (40) fixed to the housing (20), a tubular member (42) slidably fitted in a tubular portion (41) of the cap member (40),
The cap member (40), a compression spring (43) interposed between the tubular member (42), and the fixed disc (33) at the flange portion (42a) at the end of the tubular member (42). It forms a rising wall that fits in.

Next, the air cylinder (23) will be described. Solenoid valves (24) (25) for supplying compressed air to the compressed air chambers (45) (46) at both ends of the piston (44) of the air cylinder (23) as usual. ) (2 position switching valve) from which the compressed air pipes (47) and (48) are connected and opened, and when the solenoid valve (24) is opened, the piston (44) rises as shown in FIG. When the solenoid valve (25) is opened, the piston (44) moves downward in FIG. 1, but in the present invention, the compressed air supply pipe (31) of the yarn delivery section (21) is provided at the upper end of the compressed air chamber (46). Connecting opening (49)
I am doing it.

Reference numeral (50) is a compressed air supply pipe from a compressed air source connected to the solenoid valves (24) and (25).

Next, the tensor device (26) will be described. The tenser device (26) of this example has a cylinder body (52) fixed to the projecting plate portion (20a) of the housing (20) with screws (51) as shown in FIG. , A piston rod (53) that advances and retracts in the cylinder body (52), and a tensor pressure adjusting member (55) screwed into a tip screw portion (54) of the piston rod (53) via a compression spring (56). It is composed of a thread sandwiching disk (57) which is pressed and biased by the disk.

That is, (58) is a disk which is fixed to the cylinder body (52) side and which forms a pair with the disk (57) to sandwich the thread (F), and (59) is a boss at the center of the disk (57). The boss portion (59) is slidable with respect to the rod (53), and at the position shown in FIG. The intermediate step portion (53a) is separated from the boss portion (59), but when the piston rod (53) projects, the step portion (53a) engages with the boss portion (59). 4 is pushed to the left to make a gap between the disk (57) and the disk (58) so that the tension applied to the yarn is zero.

(60) is the piston portion of the piston rod (53), (6
1) is a spring for constantly urging the piston (60) in the retracting direction, and the cylinder (62) extends the rod (53) by supplying compressed air to the compressed air chamber (62) to interrupt the supply of compressed air. If the lever is pulled back by the force of the spring (61),
A compressed air supply pipe (63) to the compressed air chamber (62) is connected to the solenoid valve (24).

Since the supply device (17) of this example has the structure as described above, at the same time as inputting a drive start signal to the bottom back roller (2) at the start of spinning, the solenoid valve (24) is slightly delayed. ) Input an open signal (in this case, the other solenoid valve (25)
Of course, the compressed air flows into the compressed air chamber (46), the piston rod (38) of the air cylinder (23) rises in FIG. 1, and the holes of the movable disk (32) and the fixed disk (33). (3
5) A series of yarn guide holes are formed by aligning (36) with each other, and the piston rod (53) of the tensor device (26) is projected through another compressed air supply pipe (63) to zero tension applied to the yarn. To

After the above conditions are met, the piston rod (38) of the air cylinder (23) reaches the most retracted position (Fig. 1) for the first time, so that the compressed air in the compressed air chamber (46) is further compressed. The yarn (F) in the guide tube (28) is positively guided to the draft device section (9) by the air flow introduced into the compressed air jet nozzle (30) through the (31) and jetted from the nozzle (30). Send it out.

At this time, since the holes (36) and (35) of the fixed disk (33) and the movable disk (32) are completely aligned with each other, the air flow smoothly flows in the guide tube (28) and flows backward. Without
Moreover, since the applied tension of the tenser device (26) is zero, the yarn (F) is sent extremely smoothly through the guide pipe (28) and the guide pipe (19) to the draft device portion (9).

The end of the yarn (F) sent to the draft device unit (9) is immediately nipped by the front rollers (7) and (8) and sent toward the air injection nozzle (10) by the rollers (7) and (8). However, at this point, the solenoid valve (2
4) is closed (the timer (not shown) automatically switches the solenoid valve (24) a few seconds after opening), the pneumatic supply to the compressed air chamber (46) of the air cylinder (23) is cut off, and the nozzle is closed. The jet of air from (30) stops and the positive feeding of the yarn by the air flow stops, and the piston rod (53) of the tensor device (26) returns to the fourth illustrated position by the spring (61) and is compressed. The original tension provided by the spring (56) is applied to the thread (F).

Even if the pressure in the compressed air chamber (46) of the air cylinder (23) disappears, the movable disk (32) remains in the pressing member (34).
Since it is pressed against the mounting block (27) by the holes (35) (3) of the discs (32) (33) shown in FIG.
The state in which 6) coincides is maintained, and the passage of the thread (F) is not pinched.

Further, when the supply of the fiber bundle (S) and the pressure yarn (F) is stopped at the time of yarn breakage or full winding, the rotation of the bottom back roller (2) is stopped at the same time by the stop signal. The solenoid valve (25) is switched to open by a signal, and the piston rod (3) of the air cylinder (23) is switched.
8) projects downward in FIG. 1 and the movable disc (32) is at the third position.
Since it slides and moves to the position shown in FIG. 1 and the chain line in FIG. 1, the thread (F) is cut as described above, and the cut thread end (Fa) is attached to the movable disk (32) and the mounting block (Fa). Two
7) It is sandwiched between and held.

As described above, since the yarn end is grasped at the position of the cutting and grasping device (22) which is considerably inside the guide tube (28), the draft device portion of the yarn (F) at the next spinning start. (9)
The positive feeding action in the direction is favorably performed.

〔The invention's effect〕

As is clear from the above description, in the supply device according to the present invention, the yarn supply is smoothly stopped, and the yarn introducing operation and the cutting operation for the smooth supply stop are performed at appropriate timings. No special actuator or control circuit is required.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a yarn feeder according to the present invention, FIG. 2 is a front view of a movable disc and an air cylinder, and FIG. 3 is a vertical sectional side view showing a state in which the yarn is cut by the movement of the movable disc. FIG. 4 is a vertical cross-sectional view of the tensor device, and FIG. 5 is a perspective view showing the entire core yarn manufacturing apparatus with the yarn feeding device visible. (17) ...... Thread supply device (21) ...... Thread delivery section (22) ...... Thread cutting grip section (23) ...... Air cylinder (28) ...... Thread guide tube (30) ...... Compressed air jet nozzle ( 31) ... compressed air supply pipe (32) ... movable disk (33) ... fixed disk (38) ... piston rod (46) ... compressed air chamber (F) ... processed thread

Claims (1)

[Claims] 1. A compressed air having a yarn cutting device, a yarn guide tube for sucking and introducing a yarn into the yarn cutting device, and an air cylinder for opening / closing operation of the yarn cutting device, the compressed air being connected to the yarn guide pipe. The yarn supply device in a spun yarn manufacturing device or the like, wherein the passage is connected and opened to a compressed air chamber on a side where the yarn cutting device of the air cylinder is opened.