JP2980961B2 - Spinning apparatus and method for restarting spinning operation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A spinning machine usually has a number of spinning units (spinning stations) arranged one after another. EP-A-O 1895
No. 16 discloses a rotor spinning machine having an automatic repairer (tender) that patrols along the machine and stops at any spinning unit where a yarn break has been detected or spinning has to be restarted. I have. For this purpose, the automatic repair device is provided with a manipulator that tracks the yarn end on the yarn package after the yarn is cut and either performs the threading to the rotor or separately winds the yarn to a new tube. What is important for satisfactory piecing is that a series of various operations after the start of piecing is performed at an accurate timing. For this purpose,
EP-A-0 189 516 proposes to use a control device for the repair device in order to control the entire sequence of operations after the start of piecing. This process can achieve satisfactory results. However, due to manufacturing tolerances between the individual spinning units, the response time between parts of the machine covered by the repair device yarns is variable and the overlap length between the new repair forming yarns to be spliced. Changes greatly. If it is assumed that the repair device has passed through the spinning unit immediately before the yarn breakage by the time that the patrol device of the repair device detects a yarn breakage, a reasonable time elapses.

For example, as described in German Patent (DF-PS) No. 3413894 or European Patent Publication (EP-A) No. 0107339, piecing with an air jet spinning machine requires a spinning speed of an air jet spinning machine. It is quite difficult because it is much higher than that of the spinning machine. For optimal splicing between the yarn to be spliced and the new yarn, the overlap length is approximately 2-3 times the average fiber length, for example about 25-75 mm. Assuming a spinning speed of 240 m / min, the time required to pass this overlap length is about 6 to 17 ms. Thus, the sequence of movements after the start signal is issued needs to be accurate to the millisecond (ms) in order to splice satisfactorily between two yarn ends.

According to EP-A-0107339, some components to be driven in the series of operations after the start of piecing are located on the spinning unit and others on the repair equipment. Is done. Due to tolerances, the operating delay varies between spinning units, and in the case of conventional switching valves, it can be as long as a few milliseconds, so the control of the repair equipment causes incorrect movement of the moving parts of the machine and overlaps. The length cannot be reproduced with sufficient accuracy.

In U.S. Pat. No. 4,821,504, a mobile automatic repair device for doffing with spinning machines arranged in parallel with one another is known. Each spinning machine is connected to a common control unit, which is connected by a signal line to a control unit for moving the automatic repair equipment. This common control unit indicates the direction of movement of the repair device to a second control unit on the repair device. A ramp on the selected spinning machine releases the braking action and mechanical connection with the automatic repair device.

This device, however, is a special improvement for the doffing of spinning machines and is suitable for controlling service operations at one station of the spinning machine, as required for splicing after a yarn break. Not something.

In view of the above, an object of the present invention is to consider the fact that when performing a series of service operations such as splicing in a spinning device including an automatic repair device and spinning, there is a variation in operation among a number of spinning stations of the spinning machine. Another object of the present invention is to provide a spinning apparatus capable of performing a series of operations without being affected by such variations and a method for restarting the spinning operation.

In the principle features of the present invention, a series of service operations are arranged to be shared between the textile machine side and the automatic repair device side, and when the service operation of the sliver supply mechanism on the machine side is performed, Movement of the sliver feed mechanism is detected by the detection means of the repair device and generates a signal that triggers the start of the repair device's operating cycle. Therefore, the operation cycle of the repair device is executed in synchronization with the service operation of the sliver supply mechanism of the spinning station where the repair device is located, and even if there is a variation among a plurality of spinning stations, the operation cycle of the repair device is such a cycle. It is executed accurately without being affected by variations.

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

〔Example〕

FIG. 1 is a diagram of a cross section through an air jet spinning machine 1 having an automatic repair device 2. The machine 1 includes a number of identical spinning units (spinning stations) 3 arranged in parallel. Each of the units (stations) 3 includes a winding bobbin 15 supported and operated on a sliver can 10, a draft unit 11, an air jet nozzle 12, a yarn monitor 13, a drawing roller 14, and a driving roller 16 when viewed in the yarn moving direction. And Draft unit 11 is back rollers 20, 21
And two aprons 22, 23 and front rollers 24, 25. The roller 26 drives the apron 22. roller
The apron 23 and the apron 23 are elastically pressed by the rollers 20 and 24 and the apron 22, respectively. The roller 21 can be released from the roller 20 by a sliver clamp lever 27. The lever 27 is a bearing fixed to the casing.
Mounted pivotally on 28, and by means of a solenoid 29 or a pneumatic cylinder, the fingers 30 of the lever 27 can be pivoted from a normal position spaced from the two rollers 21 and 22 to an operating position shown in FIG. In this operating position, finger 30 releases roller 21 from roller 20
At the same time that control is applied to 21, sliver 32 guided in passage 31 in finger 30 is clamped between finger 30 and the surface of roller 21.

The pull-out roller 14 includes a pull-out roller 35 and a pressure roller 36 that is elastically pressed toward the pull-out roller 35 and is rotatably mounted on a swing lever 37. The bobbin 15 is rotatably mounted on another swiveling lever 37. roller
20, 24, 26, 35, and 16 are parts of the drive shaft extending over the entire length of the spinning machine, and are common throughout the unit 3. The rollers 21, 23 and 25 are arranged in pairs on a pressing lever (not shown). The pulse transmitter 40 is connected to each of the shafts of the rollers 20, 24, 26, 35. The output of the transmitter 40 is connected to a switch circuit 41 of a control device 42 on the machine. The monitors 13 and the solenoids 29 of all the units 3 are connected to a controller 42.

The repair device is moved along the machine 1 by rollers 46 and is positioned in front of the spinning unit in need of service, for example by a light barrier 47 which scans a mark 48 on the mechanism 1. The repair device 2 includes a first actuator 49 that moves the lever 38 up and down by an arm 50, a second actuator 51 that moves the lever 37 up and down by an arm 52, and a manipulator 53 that moves a drawing tube 55 by an arm 54. . Tube 55 is connected by a hose 56 to a vacuum source. The automatic control device 57 is an actuator 49,5
1, and control the movement of the manipulator 53. The device 57 is connected to the control device 42 by a signal line 58. The reflected light barrier 59 is also arranged in the repair device 2 and is aligned with the mirror 60 fixed to the lever 27. Barrier 59
Is connected to the control device 57.

The described spinning machine operates as follows: When the yarn monitor 13 detects a yarn break in the unit 3, the yarn monitor signal excites the corresponding solenoid 29 via the control unit 42 and a European patent not shown. No. 012841
The bobbin 15 is removed from the roller 16 by means of the spinning machine such as the means of No. 7, and the bobbin 15 is braked. The clamping action between finger 30 and roller 21 stops sliver 32. The remainder of the sliver, which is still between the aprons 22, 23 and the rollers 24, 25, is removed by the still rotating apron and the rollers towards the extraction device: near the clamp lever 27 and between the aprons 22, 23 The sliver tip portion up to the inlet gap is combed out, and its cross section is reduced over a length corresponding to approximately two to three times the average fiber length, thereby improving the yarn quality of the joint.

The control device 42 of the relevant spinning unit instructs the repair device 2 to move from its actual position, for example at one end or in the middle of the machine 1, to the unit requiring service. Therefore, unlike the conventional apparatus, the repair apparatus of the present invention does not perform patrol but is put into use by the control device 42 of the spinning machine.
This helps a more rational use of the repair equipment.

When the repair device 2 comes to a position in front of the unit 3 requiring service, the actuator 49 is moved via the arm 50 to the lever 38.
And the actuator 51 raises the lever 37 via the arm 52. The yarn end of the bobbin 15 is detected by a manipulator 53 and other equipment (not shown), and is passed through the monitor 13 and the nozzle 12 to the German Patent 3413.
The roller 35, 36 is pulled back in the manner described in No. 894 or the like.
After the threading, the inlet portion of the suction tube 55 is located close to and below the roller 25. For this reason, the end of the suction tube is conically narrowed toward the roller. This working position is shown in FIG. 1 in which the thread 64 is passed through a suction tube 55 and a predetermined length of thread end 65 is stored in the tube 55.
The repair device 2 is thus ready to start piecing. This ready state is reported to controller 42 via line 58, and this report is stored in storage 66 (FIG. 2).
When the spinning machine 1 is ready to start piecing, the controller 42 starts the piecing by lowering the solenoid 29 of the unit 3 requiring service through the switch circuit 67 connected to the storage device 66. The clockwise rotation of the lever 27 releases the clamping action preventing the movement of the sliver, and the sliver tip is engaged and carried between the rollers 20,21.

The start signal of the series of operations of the repair device 2 is transmitted without delay by the barrier 59 which detects the movement of the lever 27. The start signal of the repair device is independent of any delays in the operation of the solenoids 29 which are different from one another due to tolerances between the individual units 3. Therefore, the lever
The required delay between the movement of 27 and the movement of the tube 55 and the arms 50, 52 can be designed very precisely.

After the programmed first delay period, the lever 37 is lowered by the actuator 51, and the yarn 14 is pulled out by the roller 14. Almost simultaneously, the lever 38 is lowered by the actuator 49, and the bobbin is driven by the roller 16. After a programmed second delay period,
The manipulator 53 causes the tube 55 to pivot laterally, and the tube 55 places the thread at the entry gripping point between the rollers 24 and 25. The first and second delay periods are calculated such that the yarn end 65 overlaps the sliver tip about 25-75 mm.

Both delay periods are calculated from the speed of the shaft driving the rollers 20,24,26,35. This calculation is based on the transmitter
This is performed by 44 and the circuit 41. The circuit is guaranteed that the overlap length is independent of the setting of the machine 1.

The automatic repair apparatus 2 described above can be advantageously used not only for an air jet spinning machine but also for a draw frame for a ring spinning machine.

[Brief description of the drawings]

1 is a diagram of a section through a spinning machine with an automatic repairing device: FIG. 2 is a block circuit diagram. 1 ... spinning machine, 2 ... automatic repair device, 3 ... spinning unit, 10 ... sliver cans, 11 ... draft unit, 12 ... air jet nozzle, 13 ... thread monitor, 14 ... draw-out roller, 15 …… Winding bobbin, 16… Drive roller, 20,21 …… Back roller, 22,23 …… Apron, 24,25 …… Front roller, 27 …… Sliver clamp lever, 29 …… Solenoid, 32 …… Sliver , 36 ... Pressurizing roller, 37,38 ... Swivel lever, 40 ... Pulse transmitter, 41 ... Switch circuit, 42 ... Control device, 47 ... Light barrier, 49 ... First actuator, 51 ... 2nd actuator, 50, 52, 54 ... arm, 53 ... manipulator, 55 ... drawing tube, 57 ... automatic control device, 58 ... signal line, 59 ... reflected light barrier, 64 ... thread.

Continuation of the front page (56) References JP-A-62-276035 (JP, A) JP-B-58-3054 (JP, B2) JP-T-63-503395 (JP, A) (58) Fields investigated (Int .Cl. ⁶ , DB name) D01H 9/04 D01H 4/48 D01H 15/00

Claims (11)

(57) [Claims] 1. A spinning apparatus comprising an automatic repairing apparatus and a spinning machine having a number of spinning stations, wherein each of the spinning stations has a sliver supply mechanism movable between a sliver supply position and a sliver stop position. Have
The repair device can be controlled and moved to operatively align with the selected spinning station, and the repair device can be operated in a series of times after or after the repair device is operatively aligned with the selected spinning station. The spinning machine includes a repair device control means for controlling service operation, wherein the spinning machine receives the operative alignment signal from the repair device and stops the sliver after receiving the operative alignment signal at a selected spinning station. Machine control means having means for sending a signal to the sliver feed mechanism to move from the position to the sliver feed position, wherein movement of the sliver feed mechanism triggers the start of a series of piecing operations of the repair apparatus, and the repair apparatus comprises Including detecting means for detecting the movement of the supply mechanism,
The detection means is connected to the repair device control means for sending a start signal to the repair device control means in response to the movement of the sliver supply mechanism, and the repair device control means receives a start signal from the detection means and performs a series of piecing operations. A spinning device, characterized in that the start of the spinning is triggered. 2. A spinning apparatus according to claim 1, wherein said detecting means comprises a light sensing mechanism. 3. The spinning station includes means for detecting a yarn break, wherein the means for detecting a yarn break is transmitted to a machine control means for supplying a signal to the machine control means when a yarn break is detected at a certain spinning station. 2. The spinning apparatus according to claim 1, wherein the machine control means includes means for supplying a signal to the repair device in response to receiving a yarn break signal from the detecting means corresponding to the spinning station where the yarn break has been detected. . 4. The spinning station includes a draft unit having a pair of sliver delivery rollers elastically pressed together, and the sliver supply mechanism includes sliver delivery means for sending sliver between the pair of sliver delivery rollers. The delivery means may be movable to resiliently disconnect one sliver delivery roller from the other sliver delivery roller and engage at least one sliver delivery roller to clamp sliver feed by the sliver delivery means. Item 2. A spinning device according to Item 1. 5. The sliver delivery means is operable to release the one sliver delivery roller from engagement such that the sliver delivery means is operative, and the detecting means detects such movement. And sending a start signal to the repair device control means accordingly.
The spinning device according to 1. 6. A spinning apparatus comprising an automatic repairing apparatus and a spinning machine having a number of spinning stations, wherein each spinning station has a sliver supply mechanism movable between a sliver supply position and a sliver stop position. Have
The repair device can be controlled and moved to operatively align with the selected spinning station, and the repair device can be operated in a series of times after or after the repair device is operatively aligned with the selected spinning station. The spinning machine includes means for receiving an operative alignment signal from the repair equipment and a sliver supply after receiving the operative alignment signal at a selected spinning station. Mechanical control means having means for sending a signal to the sliver feed mechanism to move from the position to the sliver stop position, wherein movement of the sliver feed mechanism triggers the start of a series of piecing operations of the repair apparatus, the repair apparatus comprising Detecting means for detecting the movement of the feeding mechanism and detecting the sliver feeding mechanism from the sliver stop position to the sliver feeding position. Spinning device being characterized in that to include a means to trigger the start of a series of yarn splicing operations Te. 7. The apparatus according to claim 6, wherein the means for receiving the alignment signal comprises a memory connected to the triggering means, and the triggering means comprises a switch circuit connected to the repair device control means. Spinning equipment. 8. The spinning station includes means for detecting a yarn break, wherein the means for detecting a yarn break is provided to the machine control means for supplying a signal to the machine control means when a yarn break is detected at a certain spinning station. 7. The spinning apparatus according to claim 6, wherein the mechanical control means includes means for supplying a signal to the repair device in response to receiving a yarn break signal from the detecting means corresponding to the spinning station where the yarn break has been detected. . 9. The spinning station includes a draft unit having a pair of sliver delivery rollers elastically pressed together, and the sliver supply mechanism includes sliver delivery means for sending sliver between the pair of sliver delivery rollers. The delivery means may be movable to resiliently disconnect one sliver delivery roller from the other sliver delivery roller and engage at least one sliver delivery roller to clamp sliver feed by the sliver delivery means. Item 7. A spinning device according to Item 6. 10. The sliver delivery means is operable to release the one sliver delivery roller from engagement such that the sliver delivery means is operative, and the detecting means detects such movement. 10. The spinning apparatus according to claim 9, wherein the start signal is sent to the repair apparatus control means accordingly. 11. A method for restarting a spinning operation by a series of piecing operations performed by an automatic repairing device attached to a spinning machine having a number of spinning stations, wherein each spinning station has a sliver supply position and a sliver supply position. A sliver feed mechanism movable between the sliver stop position and the repair device being controllably aligned with a selected spinning station, the repair device detecting means for detecting movement of the sliver feed mechanism; A signal for instructing the repair device to align with the selected spinning station is sent from the spinning machine to the repair device, and the sliver is selected at the selected spinning station after the repair device is aligned with the selected spinning station. Move the supply mechanism from the sliver supply position to the sliver stop position to supply the sliver. The movement from the sliver stop position to the sliver supply position of the structure is detected, and when the movement of the sliver supply mechanism is detected by the detection means, a start of a series of splicing operations by the repair device at the selected spinning station is triggered. A method characterized by being drawn.