JP2006225092A - Automatic doffing operation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the need of removing a bobbin by a worker, by supplying an empty bobbin to a winding device although pick-up of a yarn is failed. <P>SOLUTION: An automatic doffing operation method comprises: a doffing operation step 1000 for taking a bobbin with package out of a cradle; a yarn pick-up operation step 2000 for starting the pick-up of the yarn from a yarn pick-up device and trapping the yarn; and a threading operation step 3000 for supplying the empty bobbin to the cradle, and threading the bobbin to return to an initial state. When the trap of type yarn is failed in the yarn pick-up operation step, instead of the threading operation step 3000, a reverse rotation returning step 4000 is executed to return to the initial state by reversely rotating a motor not through the threading operation step 3000. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bobbin transfer device that is driven in conjunction with a single motor with respect to a counterpart device that includes a yarn take-out device and a winding device that includes a cradle, and an air suction type yarn trapping device. The present invention relates to a technique of an automatic doffing operation method performed by a doffing device including a cradle operating device.

  2. Description of the Related Art Conventionally, in a textile machine equipped with a yarn take-out device and a winding device, a device that automatically takes out a full-wound yarn package, supplies an empty bobbin for replacement, and hooks the yarn into the empty bobbin (automatic ball What is provided with the frying device is known. For example, the technique disclosed in Patent Document 1.

The textile machine disclosed in Patent Document 1 is a spinning machine, and is provided with a yarn discharging device including a draft device and an air injection nozzle (pneumatic spinning means), and a winding device including a cradle.
The spinning machine is provided with a number of spinning units arranged side by side and is provided with a doffing carriage that moves along the direction in which the spinning units are arranged. A doffing operation is performed by the doffing carriage.
JP 2001-254235 A

In the conventional automatic doffing operation method, since this doffing operation method is configured in a circulation process (cycle), the cycle is always executed regardless of success or failure.
Here, the doffing operation method executes a series of operations including a full-package dash operation, a new yarn discharge operation, and a yarn hooking operation for threading the thread that has been threaded out to the empty bobbin after replacement. It has become a thing.
For this reason, even if the yarn take-out operation fails, the doffing operation is not interrupted and the yarn hooking operation is executed, and an empty bobbin is supplied to the winding device. If this empty bobbin is left, if the doffing operation is succeeded later, it will be transferred in the same route as the full package, so the operator has to manually remove it beforehand. It was.

In addition, the threading operation requires a certain amount of time. If the yarn hooking operation is performed in spite of the failure of the yarn picking operation, the time is wasted.
In particular, in the case of a textile machine configured to service a plurality of counterpart devices (for example, a spinning device for one spindle) with a single doffing device, the doffing device is restrained by a specific counterpart device. As the time increases, the production efficiency of the entire textile machine is reduced.

  In other words, the problem to be solved is that, if the yarn threading operation is continued in the execution of the automatic doffing operation, the empty bobbin is unnecessarily supplied and removed. The point is to force the worker.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

That is, in claim 1,
An automatic doffing operation method performed by a doffing device with respect to a counterpart device including a yarn discharging device and a winding device including a cradle,
A balling operation step of taking out a bobbin with a package from the cradle;
A yarn discharging operation step of starting yarn discharging from the yarn discharging device and capturing the yarn;
A threading operation step of supplying an empty bobbin to the cradle, performing threading of the thread on the bobbin, and returning to an initial state;
With
When the yarn catching operation fails in the yarn picking operation step,
Instead of the yarn hooking operation step, a return step for returning to the initial state without passing through the yarn hooking operation step is executed.

In claim 2,
In the doffing device,
An air suction type yarn catching device, a bobbin transfer device, and a cradle operating device, which are driven in conjunction with a single motor,
In the balling operation step, the bobbin with a package is taken out from the cradle by the cradle operating device by rotating the motor forward.
In the yarn discharging operation step, the yarn discharging device starts yarn discharging with the motor stopped, and the yarn is captured by the air suction type yarn capturing device.
In the yarn hooking operation step, the motor is further rotated forward, an empty bobbin is supplied to the cradle by the bobbin transfer device, and the yarn hooking that the air suction type yarn trapping device catches on the bobbin is threaded. To return to the initial state,
In the return step, the motor is reversely rotated to return to the initial state without passing through the yarn hooking operation step.

In claim 3,
The yarn picking operation step is executed a predetermined number of times until the yarn is successfully caught by the air suction type yarn catching device.

In claim 4,
The doffing device is configured to be able to travel between a plurality of the counterpart devices, and one doffing device executes a doffing operation in response to a doffing operation request from the counterpart device. Is.

  As effects of the present invention, the following effects can be obtained.

In claim 1,
Despite the failure of the yarn picking operation, an empty bobbin is supplied to the winding device, and the operator is not forced to remove the bobbin.

In claim 2, in addition to the effect of claim 1,
Simplification of the device configuration is realized as a configuration in which each device provided on the doffing device side related to the dashing operation, the yarn discharging operation, and the yarn hooking operation is driven by the same drive source.

In claim 3, in addition to the effect of claim 1 or claim 2,
The success rate of the automatic doffing operation by the doffing device is improved, and the operator is not bothered when succeeding without the maintenance of the operator.

In claim 4, in addition to the effect of any one of claims 1 to 3,
In the process of configuring the doffing operation, it is not necessary to execute the yarn picking operation process that requires a certain amount of work time when the doffing operation fails, and the time for which the doffing apparatus is restrained by a specific partner apparatus is shortened. It leads to improvement of the whole work efficiency.

An embodiment of an automatic doffing operation method of the present invention will be described with reference to the drawings.
The present embodiment is an automatic doffing operation method applied to the spinning machine 1. The spinning machine 1 is a device including a yarn discharging device including a draft device 7 and a pneumatic spinning device 8, and a winding device 10.

A spinning machine 1 according to the present embodiment will be described with reference to FIG.
The spinning machine 1 includes a large number of spinning units 2 that are involved in the production of a single spun yarn, and a dive device 3 that shares a plurality of spindles that performs a doffing operation on each spinning unit 2.
Here, FIG. 1 is a view as seen from the direction in which the spinning units 2 are arranged side by side. A large number of spinning units 2 are arranged in a direction perpendicular to the paper surface, and the doffing apparatus is arranged along this direction of arrangement. 3 is movably provided.

  The spinning unit 2 is an apparatus that manufactures a spun yarn 5 from a sliver 4 supplied from a can (not shown) and manufactures a wound package 6 of the spun yarn 5. The spinning unit 2 includes a draft device 7, a pneumatic spinning device 8, a yarn feeding device 9, and a winding device 10.

The draft device 7 is a four-wire draft device, and includes four pairs of draft rollers that nip the sliver 4 and draft (extend) it.
The four pairs of draft rollers are the next draft roller pair, front roller pair 11 (one line), second roller pair 12 (two lines), and third roller pair arranged from the pneumatic spinning device 8 toward Kens. 13 (3 lines) and a back roller pair 14 (4 lines).

  The pneumatic spinning device 8 is a device that generates a spun yarn 5 from fibers constituting the sliver 4 using a swirling air flow.

  The yarn feeding device 9 is a device that feeds the spun yarn 5 manufactured by the pneumatic spinning device 8 to the winding device 10, and includes a delivery roller 15 and a nip roller 16 that nip and feed the spun yarn 5.

The yarn winding device 10 is a device that forms the wound package 6 by traversing and winding the spun yarn 5 manufactured by the pneumatic spinning device 8 in the axial direction of the bobbin 17.
The yarn winding device 10 includes a cradle arm 18 that holds the bobbin 17, a friction roller 19 that rotates the package on the bobbin 17, and a traverse device (not shown).

  As shown in FIG. 2, the cradle arm 18 is supported by the spinning unit 2 so as to be swingable about the fulcrum shaft 61. Positions at which the cradle arm 18 can tilt include a start position C1, a full winding position C2, a balling position C3, and a receiving position C4. The cradle arm 18 is movable (can be tilted) around the fulcrum shaft 61 in a range from the start position C1 through the receiving position C4 and the full winding position C2 to the balling position C3.

The start position C <b> 1 is a tilt position of the cradle arm 18 when the bobbin 17 is in contact with the friction roller 19 with the empty bobbin 17 being held on the cradle arm 18.
The full winding position C <b> 2 is a tilting position of the cradle arm 18 when the full winding package 6 is held on the cradle arm 18 and the winding package 6 contacts the friction roller 19.
That is, according to the growth (diameter change) of the yarn package 6 on the bobbin 17, the cradle arm 18 moves between the tilt ranges CR from the start position C1 to the full winding position C2.
Further, the ball throwing position C3 is a tilting position of the cradle arm 18 when the fully wound yarn package 6 held by the cradle arm 18 is taken out.
The receiving position C4 is a position just before returning from the balling position C3 to the start position C1, and is a tilting position of the cradle arm 18 when a new empty bobbin 17 is supplied. At the start position, the empty bobbin 17 held by the cradle arm 18 contacts the friction roller 19, but at the receiving position C 4, the empty bobbin 17 held by the cradle arm 18 does not contact the friction roller 19.

The cradle arm 18 is provided with a pair of bobbin holders 62 for sandwiching and holding both axial ends of the bobbin 17, and the cradle arm 18 is arranged in the axial direction of the fulcrum shaft 61 so that the space between the bobbin holders 62 and 62 can be opened. It can be opened and closed. When the cradle arm 18 is in the closed state, the bobbin package 6 (bobbin 17) is held by sandwiching the bobbin 17 by the pair of bobbin holders 62 and 62. On the other hand, when the cradle arm 18 is in the open state, the pinching of the bobbin 17 by the pair of bobbin holders 62 and 62 is released, and the wound package 6 (bobbin 17) is taken out from the cradle arm 18.
The cradle arm 18 is configured to be openable and closable in the axial direction of the fulcrum shaft at an arbitrary tilt position in the circumferential direction of the fulcrum shaft 61. The cradle arm 18 is opened and closed when operated by a cradle operating arm 40 described later. Further, the cradle arm 18 can be opened and closed at an arbitrary tilted position by an operation by the operator.

The doffing device 3 will be described with reference to FIGS. 1 and 2.
The doffing device 3 is a device that performs the doffing operation of the fully wound yarn package 6. This doffing operation refers to a series of operations including a doffing operation, a yarn out operation, and a yarn hooking operation.
The beading operation refers to an operation of taking out the fully wound yarn package 6 from the winding device 10 of the spinning unit 2.
With the yarn discharging operation, the spun yarn 5 for threading onto a new empty bobbin 17 is newly spun from the pneumatic spinning device 8, and the newly spun yarn 5 is spun off. It means the work until it is captured by the frying device 3 (suction pipe 21).
The yarn threading operation refers to an operation of supplying a new empty bobbin 17 to the winding device 10 and threading the spun yarn 5 captured in the yarn winding operation onto the bobbin 17.
The basic time required for the doffing operation is about 13 sec (seconds) in the present embodiment.

The doffing device 3 includes a suction arm 20, a bobbin chucker 30, and a cradle operation arm 40 as devices that can move forward and backward with respect to the spinning unit 2 side.
The suction arm 20 is related to yarn catching in the yarn discharging operation and yarn hooking in the yarn hooking operation. The suction arm 20 sucks the yarn end of the spun yarn 5 and catches it on the bobbin 17. A bunch winding device 22 is provided.
The bobbin chucker 30 relates to the supply of the bobbin 17 in the yarn hooking operation, and is configured as a device that can grip and transfer the bobbin 17.
The cradle operating arm 40 is related to taking out the full-wound yarn package 6 in the balling operation and supplying the empty bobbin 17 in the yarn hooking operation, and tilts the cradle arm 18 provided in the winding device 10. The device is configured to open and close.

  The doffing device 3 is also provided with a bobbin storage 50 in which a large number of empty bobbins 17 to be transferred by the bobbin chucker 30 are stored.

There are the following three positions in which the suction arm 20 moves.
A standby position S1 which is a position accommodated in the doffing device 3, a yarn catching position S2 which is a position approaching the yarn feeding device 9, and a yarn hooking position S3 which is a position approaching the winding device 10 side. is there.
The operation of the suction arm 20 is controlled so as to simply move between these three positions S1, S2, and S3.

  The standby position S1 is a position where the suction arm 20 is kept stationary in a standby state of the doffing operation (a state where the doffing operation is not executed). When the suction arm 20 is in the standby position S1, since the suction arm 20 is accommodated in the doffing device 3, there is no risk of interference with the spinning unit 2, and the doffing device 3 along the direction in which the spinning units 2 are arranged side by side. There is no problem in moving.

  The yarn catching position S2 is a yarn feeding device 9 for catching the yarn end of the spun yarn 5 to be threaded onto the empty bobbin 17 newly supplied to the winding device 10 during the doffing operation. This is the position when the suction arm 20 is approached downstream (in the yarn delivery direction). At the yarn catching position S2, the suction port of the suction pipe 21 provided in the suction arm 20 opens the spinning port of the pneumatic spinning device 8. When the suction by the suction pipe 21 is started at the yarn catching position S2, the spun yarn 5 spun from the pneumatic spinning device 8 is sucked by the suction pipe 21 via the delivery roller 15 and the nip roller 16. Captured.

  The yarn hooking position S3 is a suction arm for hooking the spun yarn 5 captured by the suction pipe 21 onto the empty bobbin 17 newly supplied to the winding device 10 during the doffing operation. This is the position when 20 is brought close to the winding device 10. At the yarn hooking position S3, the bobbin 17 held by the cradle arm 18 of the winding device 10 is hooked with the spun yarn 5 captured by the suction pipe 21. When the suction arm 20 is at the yarn hooking position S3, the cradle arm 18 is at the receiving position C4.

There are the following three positions in which the bobbin chucker 30 moves.
At a standby position B1 that is a position accommodated in the doffing device 3, a bobbin take-out position B2 that is a position that enters the bobbin storage 50, and a bobbin supply position B3 that is a position close to the winding device 10 side. is there.
The operation of the bobbin chucker 30 is controlled so as to move between these three positions B1, B2, and B3.

  The standby position B1 is a position where the bobbin chucker 30 is kept stationary in the standby state of the doffing operation (a state where the doffing operation is not executed).

  The bobbin take-out position B2 is inserted into the bobbin storage 50 to supply a new empty bobbin 17 to the winding device 10 when the doffing operation is executed, and the bobbin 17 in the bobbin storage 50 is moved. This is the position of the bobbin chucker 30 when gripping. At the bobbin take-out position B2, the hand 31 for gripping the bobbin 17 provided in the bobbin chucker 30 is driven, and the bobbin 17 is gripped by the bobbin chucker 30.

  The bobbin supply position B3 is the position of the bobbin chucker 30 when the bobbin chucker 30 approaches the cradle arm 18 in order to deliver the empty bobbin 17 to the cradle arm 18 in the winding device 10 during the doffing operation. Position. At the bobbin supply position B3, the bobbin 17 is released from being held by the bobbin chucker 30, and the bobbin 17 is delivered to the cradle arm 18. When the bobbin chucker 30 is in the bobbin supply position B3, the cradle arm 18 is in the receiving position C4.

There are three positions for the cradle operation arm 40 to move.
A standby position M1 which is a position accommodated in the doffing device 3, a supply position M2 when supplying the empty bobbin 17 to the cradle arm 18, and an extraction position when taking out the fully wound yarn package 6 from the cradle arm 18. M3.
The cradle operating arm 40 is a means for first contacting the cradle arm 18 in the circumferential direction of the fulcrum shaft 61 and tilting the cradle arm 18. It is also means for opening and closing the cradle arm 18 by pressing in the direction.
The cradle operating arm 40 is controlled to move between the three positions M1, M2, and M3, and tilts and opens / closes the cradle arm 18.

  The standby position M1 is a position where the cradle operation arm 40 is kept stationary in a standby state of the doffing operation (a state where the doffing operation is not executed).

The supply position M2 is a position when the empty bobbin 17 is supplied to the cradle arm 18. At this time, the cradle arm 18 is in the receiving position C4. Further, when the cradle arm 18 pushed by the cradle operating arm 40 tilts the cradle arm 18 at the start position C1 or the full winding position C2 toward the balling position C3, the cradle arm 18 moves toward the take-out position M3 via the supply position M2. The cradle operating arm 40 is moved.
Here, when the empty bobbin 17 is supplied to the cradle arm 18, the cradle operating arm 40 also moves in the axial direction of the fulcrum shaft 61 at the supply position M 2 to open the cradle arm 18, and the bobbin chuck 30 The empty bobbin 17 can be supplied to the cradle arm 18. When the cradle arm 18 is tilted toward the doffing position C3 during the doffing operation, when the cradle operation arm 40 passes the supply position M2, the cradle arm 18 is opened by the cradle operation arm 40. Is not done.

The take-out position M3 is the position of the cradle operation arm 40 when the cradle operation arm 40 presses the cradle arm 18 and swings it to the doffing position C3 during the doffing operation.
At the take-out position M3, the cradle operating arm 40 also moves in the axial direction of the fulcrum shaft 61, opens the cradle arm 18, and takes out the fully wound yarn package 6 held by the cradle arm 18.
The cradle operating arm 40 opens the cradle arm 18 only when the cradle operating arm 40 is in the supply position M2 and the take-out position M3. In other positions, the cradle arm 18 is kept closed.

As shown in FIG. 3, the three drive members provided in the doffing device 3, the suction arm 20, the bobbin chucker 30, and the cradle operation arm 40 receive power transmission from a single motor 70 provided in the doffing device 3. It is configured to drive in conjunction with each other.
The output shaft of the motor 70 is connected to the main drive shaft 71, and power is branched from the main drive shaft, so that each of the suction arm 20, the bobbin chuck 30 and the cradle operation arm 40 is driven.
The motor 70 is configured to be capable of forward and reverse rotation, and the main drive shaft 71 is rotated forward and backward as necessary to change the drive direction of the suction arm 20, bobbin chucker 30 and cradle operation arm 40 forward and backward. Reverse.

A cam and a follower of the cam are provided in contact with each other on a power transmission path from the motor 70 as a drive source to each drive member, and the cam is connected to the motor 70 via a link. The follower is connected to each drive member so as to be able to transmit power.
A suction cam 72 and a suction follower 29 are provided on a power transmission path from the motor 70 to the suction arm 20. Specifically, the suction follower 29 is a member such as an arm or the like disposed at the end or midway of the link that supports and drives the suction arm 20.
On the power transmission path from the motor 70 to the bobbin chucker 30, a chucker cam 73 and a chucker follower 39 are provided.
On the power transmission path from the motor 70 to the operation arm follower 40, an operation arm cam 74 and an operation arm follower 49 are provided.

  The suction arm 20, bobbin chucker 30, and cradle operation arm 40 are configured to be intermittently driven by using a cam and are driven in conjunction with each other, but the actual drive timing The driving time widths are different.

Here, the bobbin chucker 30 and the cradle operation arm 40 are configured to be driven using only the motor 70 as a drive source.
On the other hand, the suction arm 20 is provided with an air cylinder 75 as a drive source in addition to the motor 70. The air cylinder 75 is driven by the supply of air from an air compressor 76, which is an air supply source provided in the doffing device 3, so that the front end of the suction arm 20 advances and retreats with respect to the rear end (suction). Control so that the tip of the arm 20 can reach further).
The air compressor 76 is also a drive source for the suction pipe 21 provided in the suction arm 20.

The main drive shaft 71 is fixed to a suction cam 72, and one rotation of the main drive shaft 71 causes the suction cam 72 to make one rotation. Driving the suction arm 20 by one rotation of the suction cam 72 means driving of the suction arm 20 in one cycle in the doffing operation.
Similarly, the chuck cam 73 and the operation arm cam 74 are configured to rotate once by one rotation of the main drive shaft 71. The bobbin chucker 30 and the cradle operation arm 40 perform one cycle of driving in the doffing operation by one rotation of the main drive shaft 71.

As described above, the main drive shaft 71 rotates once for each doffing operation. However, in one doffing operation, the main drive shaft 71 may be temporarily stopped a plurality of times. The main drive shaft 71 itself is also intermittently driven. The cases where the operation is stopped are mainly when the ball-out cradle is opened and when the yarn is out.
Since the time-consuming operation is performed in the external device of the doffing device 3 when the doffing cradle is opened and during the yarn discharging operation, the main drive shaft 71 itself is stopped so that the working time can be obtained. Yes.
Further, at the rotational position of the main drive shaft 71, the position at the start of the doffing operation is the standby rotational position R1, the position when the doffing cradle is opened is the rotational position R2 during the doffing operation, and the rotational position during the yarn discharging operation is the yarn. The rotation position R3 is taken out.

When the cradling cradle is opened, it means the following case.
The cradle arm 18 is opened twice, when it is at the balling position C3 where the fully wound yarn package 6 is taken out and when it is at the receiving position C4 where the new empty bobbin 17 is supplied. Is done.
Specifically, the cradle arm 18 is initially in the full winding position C2 and is in a state of holding the full winding thread package 6, and then moved to the balling position C3 to be fully wound. The beading is performed. Thereafter, when returning to the start position C1, the empty bobbin 17 is supplied at the receiving position C4 in front of it.
In other words, when the balling cradle is opened, it means that the fully wound yarn package 6 is taken out (balling position C3) among the two times when the cradle arm 18 is opened. It is assumed that the empty bobbin 17 is received (receiving position C4) when the bobbin supply cradle is opened.

When the bobbin cradle is opened, the transfer operation of the fully wound yarn package 6 is performed by a transfer device (not shown), and therefore when the empty bobbin 17 is supplied by the bobbin chucker 30 (when the bobbin supply cradle is opened). It is time consuming compared to.
For this reason, when the balling cradle is opened, the main drive shaft 71 itself is stopped so that the cradle arm 18 is kept open for a longer time than when the bobbin supply cradle is opened, thereby securing the work time by the transfer device. I am going to do it.

  In the present embodiment, the time when the dashing cradle is opened is about 4.5 sec (seconds), whereas the time when the bobbin supply cradle is opened is about 3.5 seconds (second). That is, a time of about 1 sec (seconds), which is the difference, corresponds to the stop time of the main drive shaft 71.

The yarn discharging operation is when the suction arm 20 is at the yarn catching position S2 and the spun yarn 5 spun from the pneumatic spinning device 8 is picked up by the suction pipe 21. .
In the present embodiment, the stop time during the yarn take-out operation is about 1.5 to 3.0 seconds (seconds).

Next, the automatic doffing operation method in the present embodiment will be schematically described with reference to FIG.
This automatic doffing operation method is a circulation process in which the doffing operation process 1000, the yarn discharging operation process 2000, and the yarn hooking operation process 3000 are sequentially performed to return to the initial state again. That is, the state at the time when the yarn hooking operation process ends coincides with the state at the start of the balling operation process.
In this automatic doffing operation method, when there is a defect in the yarn picking operation process, the initial state (the start point of the doffing operation process) is returned without going through the yarn hooking operation process. The step of performing this return is referred to as a reverse rotation return step 4000. Here, the reverse rotation is because the rotation direction of the main drive shaft 71 (motor 70) that drives each drive member (suction arm 20 or the like) of the doffing device 3 is reversed in the reverse rotation return step 4000. It is.

The determination as to whether or not to stop the threading operation step 3000 and proceed to the reverse rotation return step 4000 is performed in two stages.
First, it is determined after the yarn picking operation step 2000 whether or not the yarn picking operation is successful. If the yarn take-out operation is successful, the process proceeds to the yarn hooking operation step 3000 as it is. When the yarn take-out operation has failed, it is determined whether or not the number of failures has reached a predetermined plural number of times (twice in the present embodiment). In the case of the first failure, the yarn take-out operation process 2000 is performed again. In the case of the second failure, the process proceeds to the reverse rotation return process 4000.

The procedure of the doffing operation will be described in detail with reference to FIGS. 5 and 6 to 8.
FIG. 5 shows the flow of the doffing operation, and FIGS. 6 to 7 show the state of the doffing device 3 at a specific time point in the progress of the doffing operation. Therefore, the doffing operation will be described with reference to FIG. 5 and FIGS. 6 to 8 showing the state corresponding to the progress of the flow.

The doffing device 3 is configured to be able to travel between a plurality of spinning units 2, stops in front of the spinning unit 2 that has transmitted a doffing operation request, and It is a fried food.
This doffing operation request is issued when the winding package 6 is full in a spinning unit 2.

FIG. 6 shows the state of the doffing device 3 at the start of the doffing operation.
At this time, the suction arm 20 is in the standby position S1, the bobbin chucker 30 is in the standby position B1, and the cradle operation arm 40 is in the standby position M1.
This doffing operation is started when a doffing operation start signal is transmitted from the control unit of the spinning machine 1 to the control unit of the doffing device 3 (step 101 in FIG. 5).

  Prior to the start of the doffing operation, the yarn discharging operation (spinning of the spun yarn 5 from the pneumatic spinning device 8) has already been completed, and the spinning unit 2 to be doffed is in operation. Is in a stopped state.

FIG. 7 shows a state of the doffing device 3 at the time of the yarn picking operation.
From the state shown in FIG. 6 to the state shown in FIG. 7, the operations from Step 102 to Step 110 (all the serial numbers of the steps in the meantime) are performed.

When the doffing operation start signal is received by the control unit (step 101), the main drive shaft 71 is rotationally driven (step 102).
During the balling operation, the main drive shaft 71 rotates from the standby rotation position R1 (step 101) to the yarn discharge rotation position R3 (step 106) via the ball discharge rotation position R2 (step 103). To do.
In response to this, driving of the suction arm 20, the bobbin chucker 30, and the cradle operation arm 40 is started.

  The suction arm 20 is driven toward the yarn catching position S2 by the start of rotation of the main drive shaft 71 (step 102). Until the yarn catching position S2 is reached, the main drive shaft 71 is temporarily stopped (step 103) when the cradling cradle is opened, and the suction arm is started by the air cylinder 75 being started (step 104). Operation 20 is extended. After passing through step 103 and step 104, the suction arm 20 reaches the yarn catching position S2 (step 105), and enters a standby state for the yarn take-out operation as it is (step 106). At this time (step 106), the main drive shaft 71 is at the thread take-out rotation position R3, and its rotation is temporarily stopped.

  The bobbin chuck 30 starts to rotate after the main drive shaft 71 starts rotating (step 102), and then temporarily stops (step 103). Then, the bobbin chucker 30 reaches the bobbin take-out position B2 (step 107). .

The cradle operation arm 40 is driven after the rotation of the main drive shaft 71 (step 102), and reaches the take-out position M3 from the standby position M1 through the supply position M2 (step 108). The cradle operation arm 40 continues to be stopped according to the temporary stop (step 103) of the main drive shaft 71 while remaining in the take-out position M3.
As described above, when the cradle operation arm 40 is in the take-out position M3, the cradle arm 18 is in an open state. Then, the main drive shaft 71 is temporarily stopped (step 103) so as to increase the duration of the open state so that the full package 6 can be taken out (when the ball-out cradle is opened). It has become.

  In the spinning unit 2, a yarn preparation operation is performed in response to the start of rotation of the main drive shaft 71 (step 110). Specifically, this yarn discharge preparation operation means that, in preparation for spinning of the spun yarn 5, the nozzle is cleaned by air injection in the pneumatic spinning device 8.

When the main drive shaft 71 reaches the yarn discharge rotation position R3 and its rotation is temporarily stopped (step 106), it becomes possible to shift to the yarn discharge operation.
In this state, the yarn discharging operation, that is, spinning of the spun yarn 5 from the pneumatic spinning device 8 and capture of the spun yarn 5 by the suction pipe 21 are performed.

  This yarn pick-up operation is performed twice at maximum in one doffing operation. If there is no problem in the first yarn take-out operation, that is, if the yarn is successfully captured by the suction pipe 21, the second yarn take-out operation is not performed. When the second yarn picking operation also fails, the doffing operation is interrupted, and the initial state (standby state) is restored.

First, the pneumatic spinning device 8 performs the first yarn discharging operation (spinning of the spun yarn 5) (step 111).
At this time, air suction is performed by the suction pipe 21 in order to catch the spun yarn 5 by the suction arm 20 at the yarn catching position S2.

  The suction pipe 21 is provided with a yarn detection sensor 23, and it is possible to detect whether or not the yarn is sucked into the suction pipe 21 by the yarn detection sensor 23 (FIG. 3).

  In response to the first yarn discharge operation, the yarn detection sensor 23 determines whether or not the yarn detection in the suction pipe 21 is successful (step 112). If it is determined that the thread extraction is successful, the process proceeds to step 113, and if it is determined that the thread extraction has failed, the process proceeds to step 114.

Here, “success in detecting the yarn in the suction pipe 21” means that the spinning operation of the spun yarn 5 by the pneumatic spinning device 8 and the yarn catching of the spun spun yarn 5 by the suction pipe 21 are both successful. Means that. That is, it means that the spun yarn 5 suitable for threading onto the bobbin 17 is sucked into the suction pipe 21 without any trouble such as being cut halfway.
On the other hand, the case where the yarn detection fails in the suction pipe 21 corresponds to the case where the spinning operation of the spun yarn 5 or the yarn catching fails.

  If the yarn detection is successful, the main drive shaft 71 at the yarn take-out rotation position R3 is rotationally driven (step 113), and returns to the standby rotation position R1 which is the initial position (step 115). The main drive shaft 71 that was in the standby rotation position R1 in step 101 has made one rotation at the time of step 115, and the doffing operation has been completed.

Here, the rotation direction of the main drive shaft 71 when the doffing operation is executed without any problem is defined as the normal rotation direction. The case where there is a problem means, for example, a case where the yarn detection finally fails (execution twice in the present embodiment) in the yarn taking-out operation and the yarn hooking operation is not executed.
Therefore, the rotation direction of the main drive shaft 71 when going from step 102 to step 106 and the rotation direction of the main drive shaft 71 when going from step 113 to step 115 are both normal rotation directions.

FIG. 8 shows the state of the doffing device 3 during the yarn hooking operation.
This threading operation is performed during the period from step 113 to step 115, that is, when the main drive shaft 71 returns from the yarn discharge rotation position R3 to the standby rotation position R1.

In this yarn hooking operation, the following work is performed.
First, the cradle operating arm 40 is returned from the take-out position M3 to the supply position M2, and the cradle arm 18 located at the receiving position C4 is opened. Along with this, the bobbin chucker 30 approaches the cradle arm 18 to supply the empty bobbin 17 and is held by the cradle arm 18.
Further, the suction arm 20 approaches the cradle arm 18 and performs a threading operation on the bobbin 17 held by the cradle arm 18 at the receiving position C4. This threading operation is performed by rotating the bobbin 17 held by the cradle arm 18 by a friction roller (not shown) provided in the doffing device 3 using the bunch winding device 22 provided in the suction arm 20. .

After the yarn hooking to the bobbin 17 newly held by the cradle arm 18 is completed, the suction arm 20, the bobbin chucker 30 and the cradle operation arm 40 are moved along with the return of the main drive shaft 71 to the standby rotation position R1. Return to the standby positions S1, B1, and M1, respectively. The suction arm 20 is returned to the standby position S1 in a state where the driving of the air cylinder 75 is stopped and the suction arm 20 is contracted after the yarn hooking is finished.
Further, as the cradle operation arm 40 returns to the standby position M1, the cradle arm 18 returns to the start position C1.
As described above, the doffing operation is completed.

Next, a description will be given of a case where the yarn detection fails in the first yarn ejection operation success / failure determination (step 112).
In this case, the second yarn take-out operation is executed, and during a time corresponding to this execution time, the main drive shaft 71 is kept stationary at the yarn take-out rotation position. Similarly, a yarn take-out preparation operation is performed (step 114).

  Next, a second yarn discharging operation (spinning of the spun yarn 5) is performed (step 116). This is the same work as the first yarn picking operation in step 111.

In accordance with the second yarn take-out operation, it is determined whether or not the yarn detection has succeeded in the suction pipe 21 as in the determination at step 112 (step 117). If it is determined that the thread extraction is successful, the process proceeds to step 113, and if it is determined that the thread extraction has failed, the process proceeds to step 118.
When the process proceeds to step 113, the yarn hooking operation is performed in the same procedure as described above, and the doffing operation is completed.

When the second yarn picking operation fails, in the current doffing operation, the threading operation is given up and the doffing device 3 is returned to the initial state. That is, the main drive shaft 71 at the yarn discharge rotational position R3 is reversely rotated (step 118) and returned to the standby rotational position R1 (step 115).
At this time, the rotation direction of the main drive shaft 71 is opposite to the rotation direction when the doffing operation is executed without any problem, that is, when the yarn hooking operation is performed.

  In the present embodiment, the rotation amount of the main drive shaft 71 from the standby rotation position R1 to the yarn discharge rotation position R3 during forward rotation is about 1/3 rotation.

  For this reason, when the doffing device 3 is returned to the standby state of the doffing operation without performing the yarn hooking operation due to the failure in the yarn picking operation, the main drive shaft 71 at the yarn discharge rotation position R3 is properly set. Rather than rotating and returning, it is more efficient to return and reverse the rotation amount. In the spinning machine 1 that performs high-speed spinning, a difference of several seconds required for return produces a large difference.

  Further, when the main drive shaft 71 is rotated forward and the doffing device 3 is returned to the standby state for the doffing operation, there is no need, and the procedure of the yarn taking out operation is executed. In this case, the bobbin chucker 30 supplies an empty bobbin to the winding device 10 despite the fact that the yarn take-out operation has failed, and when the doffing operation is performed again later, the winding device 10 An operation of removing the empty bobbin 17 is necessary. If this bobbin 17 is not removed, the empty bobbin 17 will be transported in the same manner as the transport of the normal full-winding yarn package 6 when the doffing operation is performed again later. It is.

Even when the main drive shaft 71 is rotated in the reverse direction, if the main drive shaft 71 reaches the standby rotation position R1 (step 115), the suction arm 20, the bobbin chucker 30, and the cradle operation arm 40 are in the standby positions S1 and B1, respectively.・ Return to M1. Further, the cradle arm 18 also returns to the start position C1.
Then, the doffing device 3 returns to the initial state.

Next, the difference in required time depending on the success / failure of the doffing operation will be described with reference to FIG.
FIG. 9A is a time chart when the first doffing operation is successful and the doffing operation is successful. In the present embodiment, the necessary time required for this doffing operation is temporarily If the time required for the yarn taking out operation is 2.0 sec (seconds), it is 13 sec (seconds).
As described above, the doffing operation is composed of a doffing operation, a yarn out operation, and a yarn hooking operation. Of these, the doffing operation takes 4.5 sec (seconds), and the yarn out operation takes 2.0 sec. (Seconds) is required, and the threading operation requires 6.5 seconds (seconds).

FIG. 9B is a time chart in a case where the second yarn picking operation is successful and the doffing operation is successful, that is, the first yarn picking operation is unsuccessful. In the case of the present embodiment, when the doffing operation is successful in the second yarn discharging operation, the necessary time required for this doffing operation is 15 sec (seconds).
Of these, 4.5 sec (seconds) is required for the ditching operation, 2.5 sec (seconds) is required for the first yarn discharging operation, and 2.0 sec (seconds) is required for the second yarn discharging operation. In other words, the threading operation requires 6.5 seconds (seconds).
In other words, the amount of time required for the doffing operation is equal to the time required for the yarn discharging operation, and the time required for the doffing operation is longer than the case where the doffing operation was successful in the first yarn discharging operation. Even longer.

FIG. 9C is a time chart when the doffing operation fails, that is, when both the first and second yarn ejection operations fail. In the case of the present embodiment, when the doffing operation fails, the necessary time required to return to the initial state (standby state) is 12 sec (seconds).
Of these, 4.5 sec (seconds) is required for the ditching operation, 2.0 sec (seconds) is required for the first yarn discharging operation, and 2.0 sec (seconds) is required for the second yarn discharging operation. In other words, it takes 3.5 seconds (seconds) to return to the initial state.
The time required for returning to the initial state is simply equal to the time required for the balling operation, but the ball driving operation of the present embodiment includes the time for stopping the main drive shaft 71. Therefore, the time required for the return is shorter. As described above, when the balling cradle is opened, a special time for stopping the main drive shaft 71 is provided in order to secure a working time for taking out the full-winding yarn package 6.

The following can be understood by comparing the above three time charts.
First, when the doffing operation has failed (FIG. 9C), the main driving shaft 71 is reversed and returned to the initial state in the doffing device 3 without performing the yarn hooking operation. Therefore, the required time is shorter than when the doffing operation is successful in the second yarn discharging operation (FIG. 9B). If the main drive shaft 71 is rotated forward and returned to the initial state as in the case of performing the yarn hooking operation without performing the reverse rotation of the main drive shaft 71, it is required when the doffing operation fails. The time is equal to the case where the doffing operation is successful in the second yarn picking operation. That is, the required time is shortened by the difference between the time required for the yarn hooking operation and the time required for returning to the initial state by the reverse rotation of the main drive shaft 71.

  Further, in the case of the present embodiment, when the doffing operation fails due to the length of each necessary time related to the doffing operation (the time required for the doffing operation, etc.) (FIG. 9 (c)). The time required (12 sec) is shorter than the time (13 sec) required when the doffing operation is successful in the first yarn discharging operation.

Next, processing when the doffing operation has failed will be described.
When the automatic doffing operation by the doffing device 3 for a spinning unit 2 fails, the spinning unit 2 is in a state that requires external maintenance by an operator or the like. Therefore, an alarm lamp 80 is attached to each spinning unit 2 on the front of the machine body as a means for warning the state when the spinning unit 2 is in an automatic doffing operation disabled state.
This warning lamp 80 is lit in red, for example, to give a warning to the operator when the spinning unit 2 to which it is attached is in a doffing operation disabled state.

The display means of the doffing inoperable state is not limited to the warning lamp 80, and the tiltable plate-like member attached to the spinning unit 2 body is usually kept at an angle along the body. Further, when the doffing operation is impossible, it may be tilted so as to be inclined with respect to the airframe.
Further, the position of the alarm lamp 80 in the spinning unit 2 may be the uppermost position of the spinning unit 2 and is not limited.
Further, the display color of the alarm lamp is not limited to red. In addition, during normal times, if the light is off, the display color such as green indicating the normal state may be turned on.

Here, the spinning machine 1 according to the present embodiment includes a large number of spinning units 2 and a doffing device 3 that travels between the spinning units 2 and performs a doffing operation.
For this reason, if the doffing operation may fail in a specific spinning unit 2, the doffing operation for that spinning unit 2 is interrupted, but the doffing operation for other spinning units 2 is suspended. It is possible to continue the operation.

The automatic doffing operation method of the present invention will be summarized.
An automatic doffing operation method according to a first aspect of the present invention is an automatic doffing operation method performed by a doffing device with respect to a counterpart device including a yarn take-out device and a winding device including a cradle.
The automatic doffing operation method includes a balling operation step of taking out a bobbin with a package from the cradle, a yarn output operation step of starting yarn extraction from the yarn output device and capturing the yarn, and an empty space in the cradle. A threading operation step of supplying a bobbin, threading the thread onto the bobbin, and returning to an initial state.
Then, when the yarn catching operation fails in the yarn picking operation step, a return step for returning to the initial state without executing the yarn hooking operation step is executed instead of the yarn hooking operation step.

The spinning machine 1 according to the present embodiment has the following configuration.
The spinning machine 1 includes a doffing device 3 and a number of spinning units 2 that are counterpart devices of the doffing device 3.
The spinning unit 2 includes a yarn discharging device including a draft device 7 and a pneumatic spinning device 8, and a winding device 10 including a cradle arm 18 (the cradle).
The configuration of the mating device of the doffing device 3 may be a device provided with a yarn take-out device and a winding device, and may be an automatic winder that rewinds the package. In this automatic winder, the yarn unwinding device corresponds to an unwinding device for the winding package.

The doffing device 3 includes a suction arm 20, a bobbin chucker 30 that is a bobbin transfer device, and a cradle operation arm 40 that is a cradle operation device. The suction arm 20 is provided with a suction pipe 21 which is an air suction type yarn catching device.
In the ball feeding operation process, the bobbin 17 with the winding package 6 is taken out from the cradle arm 18 by the cradle operating arm 40.
In the yarn discharging operation process, the spun yarn 5 is spun from the pneumatic spinning device 8 and the spun yarn 5 is captured by the suction pipe 21 provided in the suction arm 20.
In the yarn threading operation step, the empty bobbin 17 is supplied to the cradle arm 18 by the bobbin chucker 30, and the spun yarn 5 captured by the suction pipe 21 is threaded on the bobbin 17 to return to the initial state.

With the above configuration, when the yarn picking operation fails, the yarn picking operation step for supplying an empty bobbin for replacement is omitted.
For this reason, even though the yarn take-out operation has failed, an empty bobbin is supplied to the winding device, and the operator is not forced to remove the bobbin.

The automatic doffing operation method according to the second invention is the following configuration in the first invention.
In the doffing device,
An air suction type yarn catching device, a bobbin transfer device, and a cradle operating device, which are driven in conjunction with a single motor,
In the balling operation step, the bobbin with a package is taken out from the cradle by the cradle operating device by rotating the motor forward.
In the yarn discharging operation step, the yarn discharging device starts yarn discharging with the motor stopped, and the yarn is captured by the air suction type yarn capturing device.
In the yarn hooking operation step, the motor is further rotated forward, an empty bobbin is supplied to the cradle by the bobbin transfer device, and the yarn hooking that the air suction type yarn trapping device catches on the bobbin is threaded. To return to the initial state,
In the return step, the motor is reversely rotated to return to the initial state without passing through the yarn hooking operation step.

  In the spinning machine 1 according to the present embodiment, the following devices provided in the doffing device 3, a suction arm 20 provided with a suction pipe 21, a bobbin chucker 30 serving as a bobbin transfer device, and a cradle operating arm serving as a cradle operating device. Reference numeral 40 denotes a configuration that is driven in conjunction with a single motor 70.

With the above configuration, if the motor is rotated forward, each step constituting the automatic doffing operation method proceeds in order, and if the motor is reversed, all steps constituting the automatic doffing operation method are not performed. Even if it returns to the initial state.
For this reason, simplification of an apparatus structure is implement | achieved as a structure which drives each apparatus with which the doffing apparatus side which concerns on a dashing operation | movement, a thread | yarn taking-out operation | movement, and a yarn hooking operation | movement is driven by the same drive source.

The automatic doffing operation method according to a third aspect of the present invention is the following structure in the first or second aspect.
The yarn picking operation step is executed a predetermined number of times until the yarn is successfully caught by the air suction type yarn catching device.

  In the present embodiment, the spun yarn 5 is captured twice by the suction arm 20 including the suction pipe 21 in the yarn discharging operation step.

  For this reason, the success rate of the automatic doffing operation by the doffing device is improved, and the operator is not bothered when succeeding without the maintenance of the operator.

The automatic doffing operation method according to a fourth aspect of the present invention has the following configuration in any of the first to third aspects of the invention.
The doffing device is configured to be able to travel between a plurality of the counterpart devices, and one doffing device executes a doffing operation in response to a doffing operation request from the counterpart device. It is.

  For this reason, it is not necessary to execute the threading operation step that requires a certain amount of work time in the process of configuring the doffing operation when the doffing operation fails, and the time for the doffing device to be restrained by a specific counterpart device is shortened. As a result, the working efficiency of the entire apparatus is improved.

It is a side view of the spinning machine which concerns on this Embodiment. It is a side view of a doffing apparatus. It is the schematic which shows the drive mechanism of a suction arm, a bobbin chucker, and a cradle operation arm. It is a flowchart which shows the schematic procedure of the doffing operation method. It is a flowchart of the doffing operation. It is a side view which shows the mode of the doffing apparatus at the time of standby. It is a side view which shows the mode of the doffing apparatus at the time of thread | yarn taking-out operation | movement. It is a side view which shows the mode of the doffing apparatus at the time of thread | yarn hanging operation | movement. It is a time chart figure of a doffing operation | movement, (a) The figure is when the doffing operation is successful in the first yarn discharging operation, (b) is the doffing operation is successful in the second yarn discharging operation, (c The figure shows when the doffing operation has failed.

Explanation of symbols

1 Spinning machine 2 Spinning unit (partner device)
3 Doffing device 7 Draft device (yarn take-out device)
8 Pneumatic spinning device (yarn take-out device)
DESCRIPTION OF SYMBOLS 10 Winding device 18 Cradle arm 20 Suction arm 21 Suction pipe 30 Bobbin chucker 40 Cradle operation arm 70 Motor 1000 Doffing operation process 2000 Thread taking-out operation process 3000 Threading operation process 4000 Reverse rotation return process

Claims (4)

An automatic doffing operation method performed by a doffing device with respect to a counterpart device including a yarn discharging device and a winding device including a cradle,
A balling operation step of taking out a bobbin with a package from the cradle;
A yarn discharging operation step of starting yarn discharging from the yarn discharging device and capturing the yarn;
A threading operation step of supplying an empty bobbin to the cradle, performing threading of the thread on the bobbin, and returning to an initial state;
With
When the yarn catching operation fails in the yarn picking operation step,
In place of the yarn hooking operation step, a return step for returning to the initial state without passing through the yarn hooking operation step is executed.
An automatic doffing operation method characterized by that. In the doffing device,
An air suction type yarn catching device, a bobbin transfer device, and a cradle operating device, which are driven in conjunction with a single motor,
In the balling operation step, the bobbin with a package is taken out from the cradle by the cradle operating device by rotating the motor forward.
In the yarn discharging operation step, the yarn discharging device starts yarn discharging with the motor stopped, and the yarn is captured by the air suction type yarn capturing device.
In the yarn hooking operation step, the motor is further rotated forward, an empty bobbin is supplied to the cradle by the bobbin transfer device, and the yarn hooking that the air suction type yarn trapping device catches on the bobbin is threaded. To return to the initial state,
In the return step, the motor is reversed to return to the initial state without going through the yarn hooking operation step.
The automatic doffing operation method according to claim 1. The yarn picking operation step is executed a plurality of times until the yarn is successfully captured by the air suction type yarn capturing device.
The automatic doffing operation method according to claim 1 or 2, characterized in that: The doffing device is configured to be able to travel between a plurality of the counterpart devices, and one doffing device executes a doffing operation in response to a doffing operation request from the counterpart device.
The automatic doffing operation method according to any one of claims 1 to 3, wherein the doffing operation method is performed.

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