JPH06166470A - Apparatus for removing wound end of cup - Google Patents

Abstract

PURPOSE: To provide a device capable of surely, smoothly and completely removing an end member winding. CONSTITUTION: A roller provided with the surface of a high grip property is arranged inside the suction port 17 of a suction housing 14. A peripheral velocity for loosening a sucked thread is supplied to the roller 15. The roller 15 is provided with a saw-toothed facing for which the flank of the teeth is positioned in front in a roller rotating direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device according to the preamble of claim 1 for removing winding ends, in particular winding and / or yarn ends of the tube base region of a cup. .

[0002]

2. Description of the Related Art In a ring spinning machine, at the end of cup production,
Whether the winding end is applied to the tip of the cup or the yarn end forms a reverse winding extending from the tip of the cup to the base. For this purpose, the ring rail is moved relatively quickly from top to bottom, for example when the spindle is full. Normally, in that case, the reverse winding will end with the winding of the tube base. Depending on the ring spinning machine and its adjustment, the base winding is relatively high, for example 12-20. In that case, the splicing yarn at the tube base and the reverse winding yarn may be entangled. Even if such a cup is sent to the usual cup preparation device, which looks for the yarn end via the suction slit at the winding surface of the cup, the yarn end cannot be released.

For this reason, separate cup preparation assemblies have already been proposed. This assembly is specifically for dissociating the thread ends that are wrapped around the tube base.

CH-PS 442 101 and DE-OS
In the device according to 33 08 172, the cup is arranged with its base directly above the suction tube. Therefore, the yarn end is gripped by the suction flow and pulled out from the base portion. In order to prevent the yarn end that is too long from hanging down from the cup during continuous conveyance to the next preparation station, measures are taken to cut the yarn end just before the conveyance. This device, however, is only suitable for unwinding easy-to-remove yarn ends, especially yarn ends that do not consist of splicing yarns.

In the cup preparation device described in DE-AS 15 60571, the base winding is first unwound through a blow nozzle and then gripped and pulled out by a roller pair located below. With these rollers, a significantly higher pull-out force is achieved, as compared to the paper-pneumatic gripping and pulling-out of the base winding. of course,
This type of device has drawbacks. That is, the yarn is clamped by the two rollers, so that the suction air port behind the roller gap is covered. Therefore, measures must be taken to keep the roller gap open in order to grab the beginning of the yarn. By this measure, the roller is provided with a conical extension, as described in the above-mentioned specification, so that the cup moves in the direction of the roller gap during preparation. Similarly, the roller gap can be opened by moving at least one of the rollers in a direction perpendicular to its longitudinal axis. In either case, the roller gap must be closed again at a certain point in order to clamp the thread. The base winding can no longer be unwound if the leading end of the thread has not yet been caught in the roller gap at that time. In addition, the yarn may break after the beginning of the yarn is held in the roller gap, and the base winding may remain in the cup as it is.

[0006] For example, in the case of a so-called suction cutting drum type defibrating device known from DE-OS 35 12 403, suction ports are provided at circumferentially spaced intervals outside the suction cutting drum, and these suction ports are provided. , The suction housing arranged near the yarn end to be drawn out, and the yarn end suction port are sequentially stacked. Therefore, a sufficient suction force can be obtained only at the moment when both openings overlap. However, in order to bring the gripped yarn end to the fixed cutting edge fast enough, the suction cutting drum must be rotated at a corresponding rotational speed. By doing so, each suction port of the suction cutting drum at least largely overlaps with the yarn end suction port of the suction housing, and the time for effectively sucking the yarn end becomes extremely short. When the cups in the yarn feeding device are simultaneously rotated, the yarn end may pass through the suction port many times and may not be sucked.
Even if the yarn end is grasped and subsequently cut, if the feeding speed and the withdrawal speed of the yarn clamped between the suction cutting drum and the suction housing are different, the work of grasping the yarn end again will be delayed accordingly. Therefore, in the case of this known device,
In particular, when the number of windings at the tube base is large, the time of staying in the cup preparation device becomes extremely long. For this reason,
It usually cannot cooperate with current automatic tube winders with short cycle times.

[0007]

SUMMARY OF THE INVENTION It is therefore an object of the invention to improve the winding and / or yarn end unwinding device for winding ends, in particular the tube base area of a cup, so that these winding ends can be grasped quickly and smoothly. It is to be able to completely dissociate.

[0008]

According to the invention, this problem has been solved by means having the features of claim 1.

According to the idea of the present invention, the winding ends that are tightly overlapped and entangled with the other yarn portion cannot be disengaged only by the pneumatic method. In the known device, the effectiveness of the pneumatic means is clearly reduced by the mechanical auxiliary means, whereas in the case of the present invention, these two types of means are fully effective during all preparation steps. . In addition, according to the invention, the high rotational speed of the rollers causes a strong additional suction flow. The unraveling of the thread exerts a uniform high pulling force on the gripped thread end and does not give the thread a predetermined withdrawal speed, as is the case with known clamps. For this reason, the drawing speed of the yarn is only defined by the degree of dissociation of the yarn from the cup. The continuous action of the concentrated suction flow allows the yarn end to be quickly and reliably gripped the first time it passes through the inlet. If the yarn breaks outside the suction opening, the yarn is re-grasped very rapidly by the continuous suction air flow and is further withdrawn.

In order to generate a sufficient negative pressure at the suction port, a small amount of negative pressure is required from the outside, since a tangential flow is obtained by the rollers, which negative pressure may in some cases be separated. It suffices as long as it can convey the broken yarn.

Especially when a large number of base windings, for example 12 or more, have to be disengaged, the device according to the invention makes it possible to increase the cup rotation speed. This is because the uniform pulling force exerted on the yarn is strong enough to pull it out much faster than known devices.

By unraveling the yarn, the device according to the invention also makes it possible to entangle the yarn particularly easily and effectively.

Compared to the device for separating the yarn ends with a cutting tool, the device according to the invention breaks as the yarn, which is held under uniform tension, goes into a steep reverse winding. Has the additional advantage of The yarn end remaining in the cup is repelled by the tension acting during the breakage and the steep upward winding direction, and is caught very rapidly and easily in the suction slit arranged at the next station.

The invention is also advantageously improved by means having the features of claims 2-7.

As already mentioned, the device according to the invention can also be used without a negative pressure source. This is because the roller surface has a high gripping property and the peripheral speed is also high, so that a sufficient suction flow can be obtained. However, in addition,
In particular, it is advantageous to use a negative pressure source for sucking off the loosened yarn.

The surface having a particularly gripping property is formed by a serrated roller lining. In that case, the tooth flanks are located forward in the direction of roller rotation. For this roller, for example, an opening roller commonly used for sliver opening of a rotary spinning machine can be used.

While the cup remains on the skewer while searching and drawing the yarn end, a rotating device is required to rotate the cup in the yarn payout direction.

The suction port is constructed so that the vertical center plane of the suction port also includes the longitudinal axis of the prepared cup, in order to make it independent of the yarn feeding direction.

In particular, when it is necessary to unwind the base winding of 15 or more turns, it is preferable to draw the winding in the longitudinal direction of the cup in order to avoid feeding the winding to each individual piece. For this purpose, it must be pulled out of the cup and skewer and positioned above the suction opening. The skewer can be configured, for example, as part of a caddy for transporting cups.

In either case, it is preferable to place an air shut-off device between the negative pressure source and the suction housing, thereby limiting the required air output.

[0021]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The cup 1 of FIGS. 1 and 2 is fitted into the skewer 7 of the caddy 5 via a tube 2 or a tube base 2 '. The caddy 5 is placed on the conveyor belt 8 and is conveyed along the belt 8 by frictional contact of the caddy 5.

C-shaped guide rails 9 and 10 are provided for guiding the caddy 5. The lower horizontal members of the guide rails 9 and 10 also serve as a support for the conveyor belt 8.

At the position shown, at the bottom plate 6 of the caddy 5, a drive roller 11 and two rollers 13 facing each other are arranged. The caddy is fixed in place by these three rollers.

The drive roller 11 is rotated by a motor 12. The drive roller 11 configured as a flanged roller drives the caddy 5 by frictional contact with the periphery of the bottom plate 6 of the caddy 5. The cup inserted on the skewer 7 is thus rotated.

A base 6'is further arranged between the bottom plate 6 and the skewer 7, and this base 6'is used as a support for the pipe base or against a stopper optionally provided in the transport system. It serves as a contact and can also serve for guidance purposes.

As can be seen in particular from FIG. 2, the guide rails 9, 10 are provided with recesses 9 ', 10' into which the drive roller 11 and the opposite roller 13 project. In addition, it is conceivable to additionally provide a stopper, which holds the caddy 5 that arrives at a position where it can be rotationally driven between the three rollers 11, 13. For that purpose, for example, although not described in detail here, the drive roller 11 or 13 can be displaceable in a direction perpendicular to the conveying direction of the conveyor belt 8.

The suction housing 14 is arranged immovably in the position shown. The holding part is omitted. The suction port 17 is arranged as close to the cup surface as possible.

In FIGS. 1 and 2, arrows show how the air flow around the cup 1 passes through the suction port 17, the side of the roller 15, and the passage 18. By setting the roller rotation speed to a relatively high value, for example, 5,000 rpm, it is possible to generate an air flow only on the roller surface having a high grip property. This air flow is strong enough to grip and pull the yarn. The overlay of the roller 15 is preferably the overlay shown in FIG. This overlay consists essentially of a toothed wire 32 mounted helically around the rollers 15-24. The toothed wire 32 is partially shown in FIG. 4B and will be described in detail later.

As described above, by generating the air flow, the yarn end, which may be entangled with a so-called splicing yarn, is sucked from the suction port 17 and the roller 15
Reach the top of the. Due to the high gripping surface and the high peripheral speed, the sucked yarn ends are unraveled into individual fibers, but in that case also high tension still acts on the yarn. Unlike the prior art, it is not necessary to pinch the thread, for example in the roller gap, to obtain this tension. Further, even after the yarn end is mechanically gripped, a uniform strong tension is exerted and at the same time, a sufficient suction flow is maintained. by this,
If the yarn breaks, a new yarn end is recaptured very quickly.

The tension on the yarn end is almost independent of the yarn feeding speed. This is because the peripheral speed of the roller 15 is much higher than the drawing speed of the yarn. For this reason,
It is not necessary to match the drawing speed with the drawing speed. The pay-out speed depends on the diameter of the winding body at each time when the yarn is drawn, and can vary significantly even in the same cup. As a result of the above measures, the yarn is prevented from undergoing an extremely abrupt change in strength, so that as long as the yarn is in the area of the suction port 17, breakage is rare. Thus, a smooth and perfect feeding of the edge winding is guaranteed.

This device can be used regardless of the winding direction of the yarn on the cup 1. In that case, the only necessary precaution is that the motor 12 drives the drive roller 11 in the direction in which the yarn is delivered and in the direction in which the cup can be rotated. Due to the configuration and arrangement of the suction port 17, the same function is exhibited regardless of the rotation direction of the cup 1 or the winding direction of the yarn. Guide plates 20 arranged on both sides of the suction port 17,
21 surely introduces the yarn pulled out from the cup into the suction port 17 and guides it onto the roller 15.

A suction pipe 19 is connected to the suction housing 14. This suction pipe 19 is connected to a negative pressure source via a filter which is interposed. An air blocking member (not shown) is arranged between the negative pressure source and the suction housing 14. This makes it possible to limit the connection between the suction housing 14 and the negative pressure source to the time range in which the cup is processed.

The air guiding edge 22 further directs the air in the passage 18 flowing tangentially from the roller 15 into the suction tube 19 so that as little air as possible containing the fibers loosened by the upholstery of the roller 15 is present. , Further roller 1
Taken by 5.

The roller 15 is in this case directly connected to the motor 1
Combined with 6. The motor 16 rotates at a rotation speed of 5000 rpm. The peripheral speed that can be reached is about 1,
000 m / min. The roller diameter is 60 mm. As this roller, as shown in FIG. 4 (a), an opening roller used for opening the sliver in the rotary spinning machine can be used.

In the variant of the invention shown in FIG. 3, the roller 24 is arranged with its axis of rotation horizontal. The point clarified by this figure is that the device of the present invention is
It is not limited to a specific position of this roller.

The suction housing 23 has a suction port 25 having a structure similar to that of the suction port 17. The passage 27 is the roller 2
4 is directly connected to the movement direction of the overlay. This allows relatively convenient air guidance. In this case as well, the passage 27 continues into the suction pipe 28. Suction pipe 2
8 is preferably connected to a negative pressure source and can be kept shut off by means of a slide valve.

In addition, a reverse winding disengagement member 29 is additionally shown in FIG. This dissociation member is
This preparation station can additionally be equipped. When the air flow direction is determined by the specific position of the roller 24, the disengaging member 29 first divides the reverse winding yarn 3 and then, together with its yarn end, the lower part of the reverse winding yarn 3 including the base winding 4. Begins to be sucked. For this purpose, the cup 1 must be rotated in the opposite direction. The air guiding edge 26 is
Also in the case of this example, it is useful for introducing the tangential air flow generated around the roller 24 into the suction pipe 23.

As shown in FIG. 4A, the roller 2
4 has a shaft 30 on which the armature of the motor 34 is arranged. Needless to say, lower rotation speed motors can be used and the drive force can be correspondingly transmitted to the shaft 30 via the V-belt.

From the portion of the toothed wire 32 shown enlarged in FIG. 4B, the tooth flank 33a and the tooth back 33b can be seen. The flank 33a is arranged forward in the rotation direction of the roller 24 in order to increase the pulling force of the yarn or the fiber. In addition, in this way a larger amount of air can be entrained, which reinforces the suction flow obtained only by the rollers. Since the toothed wire 32 is helically fitted in the bed on the roller 30,
It will be caught very quickly by the flanks 33a without getting into the groove between the toothed wires 32.

Instead of using a serrated closing,
Within the framework of the invention it is also conceivable to use the clothing used for the card cylinder. In each case, the important point is that the upper layer has sufficient grip, can loosen the yarn, and also generates air flow as much as possible to give sufficient suction force to the yarn to be released from the cup. To be able to influence.

In the case of another embodiment of the invention shown in FIG.
There is no need to first rotate the cup 1 in order to accelerate the withdrawal of the relatively large number of base windings 4. For this purpose, a cup operating device, which is described in detail below, is provided.

In this case, the cup is fitted on the skewer 7 of the caddy 5. The bottom plate 6 of the caddy 5 is placed on the conveyor belt 37. The conveyor belt bearings are not shown. In this example, cup 1
Since there is no need to rotate, the preparatory position is also not equipped with a rotary drive. Rather, guide profiles 36, 38 are only provided for guidance along the transport path. The covers 35 and 39 are for pressing the caddy 5 when the cup is pulled out. In addition, a stopper 40 is provided in this case. This stopper serves to hold the base 6'of the caddy 5 until the cup 1 is again inserted into the skewer 7 and further conveyed.

The lift mechanism 41 has two holders 49 arranged in front and rear in FIG. The holder in front is not visible in the figure. Both holders are connected to each other via a bridge 49a, shown in section.

Guides 45, 46 are arranged on the holding body 49, along which guide bolts 43, 44 can slide.
A rope 48 is connected to the gripper 42 at a mounting member 58 for performing a lifting movement. This rope 4
8 is wound around the rope pulley 47. The rope pulley 47 is driven by the motor 50.

By rotating the rope pulley 47 counterclockwise, the rope 48 is wound around the pulley 47,
The gripper 42 rises. In that case, in the first stage, the gripper 42 exclusively performs the upward movement. This upward movement is forced by the vertical extension of the guides 45,46. When the guide bolt 43 reaches the upper end of the guide 46,
In the following movement stage, it also becomes the turning point of the gripper 42. The guide bolt 44 then passes through the partial circle of the guide 45 and reaches the upper end. In this end position cup 1 occupies position 1 '. In this position, the cup 1 is arranged in the suction port 52 of the suction housing 57. Since the cup 1 swivels into the suction port 52, the suction port 52 is additionally provided with a side port 52 '.

Further details of the gripper 52 are not shown in the figure. This is because any known gripper having an arbitrarily selectable clamp mechanism can be used.

The roller 53 is constructed according to the rollers 15 to 24. Similarly, the structure of the suction housing 57 having the passage 55 and the suction pipe 56 is based on the structure of FIGS. 1 and 2. The roller 53 is also directly driven by the motor 54 in this case.

A control unit 51 is provided for associating the stopping of the caddy 5, the withdrawal of the cup 1, the positioning above the inlet 52 and, optionally, the operation of the air flap closing the inlet tube. .

The apparatus shown in FIG. 5 allows multiple base windings to be unwound from the cup at one time. A suitable use for this device is when the time to unwind the base winder is longer than the total time required to draw, position, and refit the cup, including suctioning the base winding as a bundle.

In the above, the respective embodiments have been described only for unwinding the base winding of the cup, but it is also conceivable to use the device according to the present invention for unwinding the so-called tip winding or upper winding.

[Brief description of drawings]

1 is a cutaway side view of a device according to the present invention.

2 is a plan view of the device of FIG. 1. FIG.

FIG. 3 is a side view showing a modification of the device of the present invention.

FIG. 4 is a perspective view of a roller for loosening a sucked yarn and an enlarged view of a closing forming a lining of the roller.

FIG. 5 is a side view of another variation of the invention in which the cup is withdrawn from the skewer to unwind the base winding.

[Explanation of symbols]

 1 cup 2 cup tube 2'tube base 3 reverse winding 4 base winding 5 caddy 6 substrate 7 skewer 8 conveyor belt 9,10 guide rail 11 drive roller 13 roller 14,23,57 suction housing 15 roller 17,25,52 suction Mouth 18,27 Passage 19,28 Suction pipe 20,21 Guide plate 29 Reverse winding dissociation member 30 Shaft 32 Toothed wire 33a Tooth flank 37 Conveyor belt 40 Stopper 41 Lifting mechanism 42 Gripper 43 Guide bolt 49 Holder 45, 46 Guide 50 motor

Claims (8)

[Claims] 1. To prepare a payout process of a tube winding machine,
A device for removing winding ends, in particular base winding and / or yarn ends in the area of the tube base (2 ') of the cup (1),
In the type in which the suction port (17; 25; 52) of this device and the cup having the tube base are movable and can be positioned in close contact with each other, in the suction housing (14; 23; 57). , Inlet (17; 25; 5
2) is followed by a roller (15; 25: 53) having a highly grippable surface (31), which roller is connected to a drive (16; 34; 54), which drive is An apparatus for removing a winding end of a cup, which gives a roller a circumferential speed for loosening sucked yarn. 2. The peripheral speed is at least 500 m / mm
The device according to claim 1, characterized in that 3. Device according to claim 1 or 2, characterized in that the suction housing (14; 23; 57) is connectable to a negative pressure source. 4. The roller (15; 24; 53) has a serrated top (31), the flanks (3) of the teeth of this top.
Device according to any one of claims 1 to 3, characterized in that 3a) is located forward in the direction of rotation of the rollers. 5. Device according to claim 4, characterized in that the rollers (15; 24; 53) are conventional opening rollers used for opening the sliver of a rotary spinning machine. 6. Device according to claim 1, characterized in that it has a rotating device (11, 12, 13) for the cup (1) which has to be prepared. 7. The construction and arrangement of the suction openings (17; 25) is characterized in that the suction opening center plane includes the longitudinal axis of the cup which must be prepared. apparatus. 8. The glass (1) is grasped and the skewer (1
Device (4) for withdrawing from 7) as it passes and also for positioning the tube base (2 ') of the cup above the suction port (52).
Device according to any one of claims 1 to 5, characterized in that it comprises 1).