WO2012138245A1

WO2012138245A1 - Device for fixing a thread on a spindle before doffing

Info

Publication number: WO2012138245A1
Application number: PCT/RU2011/000230
Authority: WO
Inventors: Владимир Васильевич КУРКОВ
Original assignee: Kurkov Vladimir Vasilievich
Priority date: 2011-04-07
Filing date: 2011-04-07
Publication date: 2012-10-11
Also published as: CN103547717B; CN103547717A

Abstract

The invention relates to the textile industry and concerns a spindle of an annular spinning and twisting frame. The device (figure 1) comprises a toothed wheel (1) having teeth (2) for grasping a thread (6), a clamping crown (4) having teeth (5) arranged between the teeth (2) of the toothed wheel (1), in the same plane therewith, and knives (7, or 14, or 17), wherein the clamping crown (4) is fixed on the spindle so as to be able to rotate and fix the thread (6) in a vertical gap between a pair of opposite lateral working surfaces of the teeth (2 and 5) of the toothed wheel (1) and clamping crown (4).

Description

The device for fixing the thread on the spindle before removing

Technical field

The invention relates to the textile industry and relates to a spindle of a ring spinning and twisting machine.

The prior art.

A device for fixing the thread on the spindle before removal (analogue) containing a gear wheel, a stationary passive knife for the thread, and a clamping crown fixed under the gear wheel with the ability to move up and down and fixing the thread in the horizontal gap between the lower end of the gear and the upper end pressure crown using the ring strip of the machine (application DE N ° 19755972, A 1, Int. CI. D 01 H 9/16, Fig. 1, 5, 7).

The disadvantages of the analogue is the lack of reliability of the device due to winding on a spindle of thread 40-90 mm long and the possibility of its accumulation in the horizontal gap between the lower end of the gear and the crown, and because of the passive knife, as well as energy costs and wear of the device due to friction between the crown and the ring bar.

A device is known for fixing the thread on the spindle before removal (prototype) comprising a gear wheel, a fixed knife for the thread, a clamping crown fixed with the possibility of moving down and up and fixing the thread in the horizontal gap between the lower ends of the gear teeth and the upper end of the crown, and a drive connected to the crown with the possibility of opening and closing the device by centrifugal force. (United States Patent 4,941,314. Odaware Industry Co., Ltd. 10/10/1989. Fig. 1-8. In Cl ⁵ D01H 1/38, US.C1. 57/299.).

The disadvantages of the prototype is the low reliability due to the winding of a spindle of a thread with a length of at least 40-90 mm and the possibility of its accumulation in a narrow horizontal gap and overlapping adjacent threads, as well as due to the passive operation of the knife for cutting the thread.

Disclosure of inventions.

The objective of the invention is to increase the reliability of the device, which is solved by the fact that the device containing a gear wheel with teeth mounted on a spindle, a crown mounted on a spindle with the ability to move and fix the thread in the gap between a pair of opposing surfaces of the gear wheel and crown, knife for cutting the thread, and the corresponding drive, according to the invention, the teeth of the crown are located in the same plane with them with the possibility of rotation and fixation of the thread in a vertical gap between a pair of lateral opposite surfaces of the teeth of the gear wheel and the crown.

Due to the new arrangement of the teeth of the crown, their new location and the new interaction with the gear, knife and thread, the thread is fixed on the spindle immediately after it enters the vertical gap between the teeth of the gear and the crown. Thus, in the new device, winding the thread on a spindle is not required, which eliminates the accumulation of waste thread and, accordingly, increases the reliability of the device.

Brief Description of the Drawings

The invention is illustrated by figures in which:

FIG. 1 - the first version of the device;

FIG. 2a-2b is a plan view of the device of FIG. one ;

FIG. 3a, 3b — sequence of operation of the device of FIG. one; FIG. 4 - thread cutting process on the device of FIG. one ;

FIG. 5 - the second version of the device with cutters on the teeth 2; FIG. 6 - the third version of the device;

FIG. 7 - the fourth version of the device;

FIG. 8a-8b is a plan view of the devices of FIG. 7;

FIG. 9a-9c show the operational sequence of the device of FIG. 6; FIG. 10 is a fifth embodiment of a device with a drive sleeve. Examples of the best variants of the invention

The first embodiment of the device (Fig. 1) contains a gear wheel 1 with teeth 2, rigidly mounted on the spindle 3, a crown 4 with teeth 5 on the upper end mounted on the spindle 3 under the gear 1 with the possibility of rotation together with teeth 5 and fixing thread 6 between the lateral surfaces of the teeth 2 and 5, the circular knife 7 and the self-adjusting drive in the form of a pair (or more) of L-shaped flat springs 8, rigidly fixed by the lower end to the spindle 3 symmetrically to the axis of the spindle.

A pin 9 is rigidly fixed at the upper end of each spring 8. The crown has a pair (or more) of spline grooves 10 in which the pins 9 are located. The pin 9 is firmly connected to the spring 8 by means of a plate (shown in Fig. 1, but not indicated). The dimensions and weight of this plate allow you to increase or decrease the centrifugal force acting on the spring 8.

The ring strip 11 of the machine with the ring and the slider moves up and down and winds the thread 6 on the package 12.

In the operating mode, the device is open (Fig. 2a, 3a), and in the static position it is closed (Fig. 2b, 3b).

Slot grooves 10 (Fig. 2A, 2b) are located at an angle of 30-60 degrees to the radial line, which provides rotation of the clamping crown 5.

The teeth 2 and 5 (FIG. 3a, 3b) have a cross section in the form of a right triangle.

In the static position of the device, two opposite the lateral working surfaces of the teeth 5 and 2 are pressed against each other (Fig. 3b, 3c) and the thread 6 is fixed using the springs 8 (Fig. 1). The working side surfaces of the teeth 2 and 5 have several horizontal grooves (not marked) to increase the reliability of fixation of the thread 6.

In the open position of the device (Fig. B), the teeth 5 of the clamping crown are located under the teeth 2 of the gear wheel and form single teeth (not indicated) having a rectangular cross section.

The blade of the disk knife 7 (Fig. 4) is located so that when removing the package 12, the thread goes around the knife 7.

In the closed position of the device, the outer (Fig. 2b) and lower (Fig. 3b) surfaces of the teeth 2 and 5 form a ratchet wheel (not indicated). This shape and arrangement of teeth 2 and 5 provide for the smooth sliding of thread 6 along teeth 2 and 5 (shown in Fig. 2b by an arrow) in the direction of rotation of the spindle (to the place of its fixation) and winding of thread 6 onto package 12 without residue.

The width and height of the teeth 2 and 5 (Fig. For), as well as the width of the vertically located working gap 13 are equal to each other, and the lower end of the teeth 5 (Fig. 1) of the crown 4 is located at an angle of 5-45 degrees to the horizontal, which ensures firstly, the equal rigidity of teeth 2 and 5, secondly, creates favorable conditions for the filament to enter the gap 13, and thirdly, allows the sliding of the thread 6 along the teeth 2 and 5. Thin pads made of elastic material can be fixed on the lateral surface of the teeth 2 and / or 5. Such gaskets, firstly, increase the reliability of fixation of the thread and, secondly, compensate for possible backlash between different pairs of teeth 2 and 5.

The pin 9 and the groove 10 can be located 10-15 mm away from the axis of movement of the spring 8 (not shown in Fig.).

Thus, thanks to the new arrangement and the new interaction of the teeth 5 of the clamping crown 4 with the teeth 2 of the gear 1 and the thread 6, as well as the new arrangement of the actuator 8 and its new interaction with the clamping crown 4, the goal of the invention is achieved (improving the reliability of operation). Firstly, the winding of the thread on the spindle and the accumulation of residual filament in the device are excluded, and, secondly, cleaning of the spindle is not required.

The second variant of the device (Figs. 5a - 5b) differs from the first variant in that at the upper end of the teeth 2 of the gear wheel 1 there is a radial knife 14 for cutting the thread 6. The teeth 2 have a section in the form of a rectangular trapezoid, which increases the rigidity of the knife 14. B in this case, the width of the gap 13 is reduced.

On the teeth 5 of the crown 4 there are corresponding niches 15 for placing the knife 14 in them.

The third version of the device (Fig. 6) is characterized in that the distance between adjacent teeth 2 of the gear 1 is 2-5 mm greater than the width of the teeth 5 of the crown. Therefore, in the open (Fig. 6a) and in the closed (Fig. 6b) position of the device between teeth 2 and 5 there is a gap 13. This option is used if the spindle stops quickly (in 1-2 seconds). The fourth embodiment of the device (Fig. 7) is characterized in that, firstly, it has a gear sleeve 16 with teeth-knives 17 fixedly mounted on the spindle 3, and, secondly, the gear 1 is fixed inside with the possibility of rotation (Fig. 8a -8b, 9a - 9c) relative to the sleeve 16 using a pair of springs 18.

The teeth 5 of the crown 4 have an L-shaped cross-sectional profile (Figs. 9a - 9c).

In the closed position of the device (Fig. 8b), teeth 2 and 5 form a closed rim in the form of a ratchet (not indicated), along which the thread 6 can slide to the place of fixation.

The upper ends of the steel teeth 5 are made in the form of teeth-knives 5.

In the open position of the device (Fig. 9a), the working surface of the teeth 2 is located 0.5-1.5 mm in front of the blade of the corresponding tooth-knife 17 using springs 18.

The elastic force of the springs 21 (Fig. 7) should be 1.5 to 3 times greater than the force of the springs 18 (Figs. 9a - 9c).

The main difference of the fourth variant is that the fixed teeth-knives 17 and the upper surfaces of the teeth 5 form scissors and are able to cut the most durable thread 6. The thread 6 (Fig. 8b) is fixed by teeth 2 and 5 perpendicular to the tooth-knife 17, which increases reliability scissors work. The fourth version of the device is designed to work with high-strength threads.

The crown 4 can be spring-loaded from below (not shown), which will eliminate the formation of play between the teeth-knives 5 and 17 and increase the reliability of the device.

The drive of the fourth embodiment of the device (Fig. 7) is made in the form of a pair (or more) of sliders 19 mounted on racks 20 mounted on a spindle 3 at an angle of 5-20 degrees to the axis of the spindle 3. On the racks 20, under the sliders 19, springs 21 are installed The pins 22 are fixed on the sliders 19, and on the side inner surface of the crown 4 there are screw grooves 23. The pins 22 are located in the screw grooves 23 with the possibility of turning the clamping crown in one or the other side and opening or closing the device, respectively. If necessary, the device may have a mechanical latch 24 (Fig. 7), which holds the slider 19 (or pin 9, shown in Fig. 1) at the time of starting the spindle for several seconds and eliminates the premature opening of the device.

One of the modifications of the fourth variant of the device (not shown) may have a fixed gear wheel 1 and a gear sleeve 16 with teeth-knives 17, mounted on a spindle 3 with the possibility of rotation together with the crown 4 and independently.

The working side surfaces of the teeth 2 and 5 can be located vertically (as shown in Fig. 9a - 9c) or under angle of 3-10 degrees to the vertical, depending on operating conditions and thread thickness 6.

Another modification of the fourth embodiment of the device may have fixed teeth 2 with gaskets made of elastic material (at least 2 mm thick) fixed on the side surface of teeth 2. In this case, the teeth of knives 5 are moved under the teeth of knives 17 and cut the thread 6 due to compression elastic gaskets (springs 18 are not needed).

The fifth embodiment of the device (Fig. 10) is characterized in that it has a drive in the form of a drive sleeve 25 with an annular protrusion 26 and a spline pin 27 mounted coaxially to the crown 4. A screw groove 28 is made on the lateral surface of the pressure crown 4 to rotate the crown 4. Drive sleeve 25 is spring-loaded from below using a spring 29. On the spindle 3 there is a vertical groove 30, while the pin 27 is located simultaneously in the screw groove 27 of the crown and the vertical groove 23 of the spindle 3.

The fifth variant of the device is opened and closed using the ring strip 11 of the machine.

Examples of the invention.

In the operating mode, the pins 9 (Fig. 2a) under the action of centrifugal force of the spring 8 are moved away from the axis of the spindle 3 and open the device. In this case, between the teeth 5 and 2 (Fig. 2a, 3a), a vertical working gap 13 is formed. Before removing the package 12, the annular strip 11 (Fig. 1) moves down and the thread 6 automatically enters the vertical gap 13 (Fig. 2a, 3a) between teeth 2 and 5.

Immediately after the thread enters the gap 13, the spindle 3 stops, while the centrifugal force decreases, the springs 8 (Fig. 1) and the pins 9 (Fig. 2b) close the device and fix the thread 6 (Fig. 2b, 3b) between teeth 2 and 5 In the event that the machine has an inertial spindle drive, the spindle stops after 1 - 1.5 seconds. after fixing the thread and winding the thread 6 on the spindle is automatically excluded. In the event that the spindle stops slowly (3 - 7 sec.), Thread 6 is wound on the spindle 0.5 turns (40 - 90 mm).

When you remove the package 12 from spindle 3 (Fig. 4), the thread 6 is pulled, goes around the blade of the fixed disk knife 7 and breaks off at the point of contact with the knife. The removal is complete.

At the subsequent start of the spindle 3, the thread 6 is tensioned and wound on the spindle without a remainder. If the thread 6 is wound on a spindle, then after starting the spindle, it slides along teeth 2 and 5 as if on a ratchet to the place of its fixation (shown in Fig. 2b by an arrow) and is wound on package 12 without residue.

It is important that within 3 - 10 seconds. after starting the spindle 3, its speed should be less than critical to prevent premature opening of the device and release of thread 6. After the spindle speed and centrifugal force exceed the critical value, the device automatically opens. In the event that the device has a latch 24 (as shown in Fig. 7), the spindle 3 starts in normal mode. 5-30 seconds after the start of the spindle 3, the centrifugal force reaches a critical value and the spring 8 automatically opens the latch 24 and the device.

The second variant of the device (Fig. 5a, 5b) works similarly to the first variant. The difference lies in the fact that the cutting of the thread 6 is carried out by a radial knife 14 (Fig. 5b).

The operation of the third embodiment of the device (Fig. 6a, 6b) is different in that the spindle 3 should stop 1-2 seconds after the thread enters the working gap 13 (Fig. 6a). In this case, the thread does not have time to wind up on the spindle 3. After removing the package 12 and starting the spindle 3, the thread 6 enters the gap 13 closest to the location of fixation of the thread (Fig. 6b). Therefore, the thread 6 is wound on the package without residue.

The work of the fourth embodiment of the device (Fig. 7) is characterized in that when the device is closed and the crown 4 is rotated, first the teeth 5 are pressed against the teeth 2 of the gear wheel and the thread 6 is fixed (Figs. 9a - 9b). It is important that the blade of the tooth-knife 17 at this moment is located 0.5 - 1.5 mm behind the thread 6 (Fig. 9b), and the spring 18 presses the tooth 2 to the tooth 5, which ensures the fixation of the thread 6.

Then the crown 4 (Fig. 9b - 9c) continues to rotate to the extreme position, while the teeth 5 and 2 along with the thread 6 are moved 0.5 - 1.5 mm under the tooth-knife 17 (Fig. 9c) and cut the thread 6. Prongs-knives 17 and prongs 5 of the crown 4 work like scissors.

In the operating mode, the sliders 19 under the action of centrifugal force move along the inclined racks 20 to the lowest position (in Fig. 7 is shown by an arrow) and open the device (Figs. 8a, 9a). When the spindle 3 stops, the sliders 19 rise to their highest position (Fig. 7) by means of springs 21 and close the device (Fig. 8b, 9b, 9c).

The work of the fifth embodiment of the device (Fig. 10) is characterized in that before removal the annular strip 11 is lowered, abuts against the protrusion 26 and moves the sleeve 25 15-25 mm down. At this moment, pin 27 rotates crown 4 and opens the device. The thread 6 is included in the gap 13 (as shown in Fig. 2A, Over, or 8a, 9a). The vertical groove 30 provides vertical movement of the sleeve 24, and the screw groove 28, the rotation of the clamping crown 4.

After that, the ring bar 11 rises to the starting position (10-15 mm above the gear ring 1) and the spring 29 moves the sleeve 25 up and closes the device (and fixes the thread 6 as shown in Fig. 2b, 3b or 8b, 9b) . Then the tooth-knife 17 and the tooth 5 of the crown cut the thread 6 (as shown in Fig. 9c). Thread 6 is wound onto the package without residue.

In the analogue and in the prototype, the thread after entering the vertical gap between the teeth of the gear must necessarily change direction and wound on spindle 3 in the horizontal gap between the gear and the crown for fixing. In the new The device does not need to wind the thread on the spindle, since the thread 6 is fixed immediately after entering the vertical gap 13 between the teeth 2 and 5 of the gear 1 and the clamping crown 4, respectively. In the event that the thread is wound on a spindle, after removing and starting the spindle, it is automatically wound on the package 12 without residue. This eliminates the accumulation of residual thread on the spindle.

In addition, the rotation of the clamping crown 4 (instead of its vertical movement in the analogue and in the prototype) allows you to trim the most durable threads.

Thus, thanks to the new shape, the new location and the new interaction of the teeth 5 of the crown 4 with the teeth 2 of the gear 1, knives 10, 14, 17 and thread 6, and also thanks to the new interaction of the known drive 8 or 19 or 24 with the clamping crown 4 is provided increase the reliability of the device.

Industrial applicability

The invention can be used, first of all, on ring spinning machines with an automatic forging stripper, and allows to increase the reliability of the machine and reduce the cost of cleaning the spindles.

Claims

1. The claims

1. The device for fixing the thread on the spindle before removal containing a gear wheel (1) with teeth (2), mounted on the spindle (3) coaxially, the clamping crown (4)

5. with teeth (5), mounted on a spindle under the gear wheel (1) with the possibility of corresponding movement and fixation of the thread (6) in the gap (13) between a pair of opposing surfaces of the teeth (2) and (5) of the gear wheel and crown, disk (7) or a radial (17) thread cutting knife (6), and

10. the corresponding drive connected to the crown (4) with the possibility of its movement, characterized in that the teeth (5) of the clamping crown (4) are located between the corresponding teeth 2 of the gear wheel (1) and in the same plane with them, and the clamping crown (4 ) mounted on the spindle (3) with

15. the possibility of rotation relative to the gear wheel (1) and fixing the thread (6) in the vertical gap (13) between the corresponding pair of lateral opposing surfaces of the teeth (2) and (5).

2. The device according to claim 1, characterized in that the teeth (2) 20. of the gear wheel (1) and the teeth (5) of the clamping crown (4)

form a closed rim in the form of a ratchet with the possibility of sliding along it the threads (6) in the direction of rotation of the spindle (3).

3. The device according to claim 1, characterized in that the toothed ring (1) is fixed under the fixed teeth-knives (17), with

25. the ability to rotate together with the teeth 5 of the clamping crown 1. (4) relative to the knives (17), while the teeth-knives (17) and the teeth (5) of the crown (4) form scissors for cutting the thread (6).

4. The device according to claim 1, characterized in that the drive is made in the form of at least a pair of flat springs (8),

5. rigidly fixed with the lower end on the spindle (3) with the possibility of moving the upper end (8) away from the axis of the spindle (3) by centrifugal force and connected to the crown (4) with the possibility of rotation.

5. The device according to claim 1, characterized in that the drive 10. is made in the form of at least a pair of sliders (19) mounted on the spindle (3) with the possibility of simultaneous movement down and to the side from the axis of the spindle (3) by centrifugal forces and is connected with the crown (4) with the possibility of its rotation.

15. 6. The device according to claim 1, characterized in that the drive is made in the form of a drive sleeve (24) and is connected to the crown (4) with the possibility of its corresponding rotation by means of an annular strip (11) of the machine.

7. The device according to paragraph 1, characterized in that it has a latch 20. (24), fixed with the possibility of fixing the pin (9) or (22) of the drive device for 3-7 seconds after starting the spindle.

25.