JPH0674535B2 - Weft automatic repairing method and device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a weft yarn storage device for a fluid jet loom, and in particular, when a weft yarn breaks between a yarn feeder and a main nozzle for weft insertion, a new weft yarn end is provided. Pull in from the yarn feeder,
The present invention relates to a method and an apparatus for automatically threading a main nozzle and automatically restoring a state in which it can be preliminarily wound on a storage drum.

Conventional technology Conventionally, when weft breakage occurs between the yarn feeder and the main nozzle, the weft insertion feeler detects the weft breakage condition,
Stop the loom automatically. After that, the locking pin is retracted by the manual button, the weft yarn on the storage drum is pulled out by an appropriate amount by hand, the preliminary winding button is pushed, the locking pin is advanced, and the rotation yarn guide is rotated on the outer peripheral surface of the storage drum. , Wrap the weft thread as many times as necessary,
Furthermore, it is necessary to manually thread the end of the weft thread through the main nozzle.

Due to such manual work, when the weft yarn is cut between the yarn feeder and the main nozzle, the repair required for the preliminary winding is complicated, and it takes time to prepare the yarn. A preliminary winding preparation process is desired.

Therefore, an object of the present invention is to pre-wind the weft yarn by automatically guiding the weft yarn in the rotary yarn guide to the inlet side of the main nozzle when the weft yarn between the yarn feeder and the main nozzle is broken. It is to reduce the burden of preparatory work, shorten the processing time, and increase the operating rate of the loom.

Therefore, in the present invention, when the weft yarn is broken from the yarn feeder to the main weft insertion nozzle, first, the rotary yarn guide is rotated at a predetermined rotation angle corresponding to the yarn holding member, that is, the first stop position. Then, the weft yarn end portion in the rotating yarn guide is sucked and held by the yarn holding member, and then the rotating yarn guide is rotated by a predetermined angle, that is, to the second stopping device, The weft thread is interposed in the moving path of the threading member, and then the weft threading member is moved to hold the weft thread at its tip and guide it to the inlet side of the main nozzle.

These series of operations can be realized by simple sequence control. By setting the two stop positions of the rotary yarn guide as described above, the weft thread is interposed in the moving path of the threading member, and the end of the weft thread is reliably guided from the storage drum to the inlet side of the main nozzle by the weft threading member. Therefore, the automation of the threading operation can be simplified and the processing time required for the operation can be shortened.

First Embodiment FIG. 1 shows a weft yarn storage device 1 which is a premise of the present invention.
Shows the configuration of. The weft yarn 2 is supplied by a yarn feeder 3, passes through a yarn guide 4, a yarn feeder 5, a guide pipe 6, and a rotary yarn guide 7.
Of the rotary yarn guide 7, which is guided to the inside of the
And a locking pin 9 on the outer peripheral surface of the storage drum 8 in a stationary state
It is measured and stored by the locking action of. The locking pin 9 is provided so as to be able to move forward and backward with respect to the outer peripheral surface of the storage drum 8, and is moved in the backward direction at the time of unwinding by an electromagnetic solenoid 10, for example.

The unwound weft yarn 2 is put into the opening 13 of the warp yarn 12 by the main nozzle 11 for weft insertion. Such a weft insertion state is detected by, for example, two photoelectric feelers 14 and 15 provided at the end of the weft yarn 2 on the arrival side. Then, the weft yarn 2 in the weft insertion state is driven into the weaving front by the hammering motion of the reed 16 and the woven cloth.
It will be 17.

The rotary yarn guide 7 is driven by a feeder motor 18 provided on the center line of the storage drum 8. Further, a main nozzle feeler 19 is provided on the inlet side of the main nozzle 11, by which a yarn breakage state of the weft yarn 2 from the storage drum 8 to the main nozzle 11 is detected.

Now, the automatic restoration device 20 of the present invention is provided with a yarn holding member 21, a yarn threading member 22, and a rotation controller 23 in relation to the configuration of the weft yarn storage device 1.

First, FIGS. 2 and 3 show the positional relationship between the thread holding member 21 and the threading member 22 in relation to the storage drum 8. The yarn holding member 21 is composed of, for example, a pipe connected to the suction air generation source 24, and is fixedly provided at a position outside the rotation locus of the rotating yarn guide 7 toward the center thereof. Also, the above threading member
22 is, for example, a piston rod 26 of an air cylinder 25 from the outer peripheral portion of the rotary yarn guide 7 toward the main nozzle 11.
It is attached to the tip of and is composed of a clip or the like that sandwiches the weft thread 2 frictionally. The air cylinder 25 is fixed to a frame or the like at an appropriate position. Further, a cutter 27 and its operating device 28 are provided near the thread holding member 21.

Next, FIG. 4 shows the rotation controller 23. The rotation controller 23 is provided for rotating the yarn guide 7 when the weft yarn 2 is broken.
To stop the rotary yarn guide 7 at the second stop position P ₂ , and then to rotate the rotary yarn guide 7 at the first stop position P ₁ , that is, at a position corresponding to the yarn holding member 21, and then rotate it by a necessary angle. As a position detecting means, for example, an encoder 29 connected to the feeder motor 18 is provided. The encoder 29 is connected to one input terminal of the comparison operation circuit 30 via the position detecting means 38.

Then, the comparison operation circuit 30 sets the rotation angles of the first stop position P ₁ and the second stop position P ₂ at the other input ends via the switches 33 and 34, respectively. , 32, respectively, and a changeover switch on the output side
It is connected to the motor driver 36 via 35. The motor driver 36 is for driving the feeder motor 18, and operates by receiving the winding amount control signal A by switching of the changeover switch 35 during a normal length measuring and storing operation. The selector switch 35 is switched by the drive unit 37 when the fixed position stop signal B is input.

Operation of the embodiment During normal weaving, the weft yarn 2 is pulled out from the yarn supplying body 3, and is retained on the outer circumference of the stationary storage drum 8 while being retained by the retaining pin 9 by the rotational movement of the rotary yarn guide 7. It will be wrapped around. When the locking pin 9 is projected on the outer peripheral surface of the storage drum 8, the weft yarn 2 is locked to it, so that the rotating yarn guide 7 is rotated so that the weft yarn 2 having the required number of turns remains stationary. The outer peripheral surface of the storage drum 8 in the state is sequentially wound. At this time, the weft thread 2 is locked by the locking pin 9 and reaches the weft-insertion main nozzle 11 at its extension.

When the locking pin 9 retracts at the weft insertion timing, the weft thread 2 in the stored state is unwound from the locking pin 9,
The weft insertion main nozzle 11 inserts the unwound weft thread 2 into the opening 13 of the warp thread 12 together with the weft insertion fluid. During this period, the motor driver 36 receives the winding amount control signal A and applies the rotation of the required rotation amount to the feeder motor 18, so that the winding amount of the weft yarn 2 is always a predetermined value on the outer peripheral surface of the storage drum 8. Keep on. Such a storing operation and a weft inserting operation are always performed in synchronization with the rotation of the loom.

By the way, during such length measuring and storing operation and weft insertion operation, if the weft yarn 2 is cut off from the yarn supplying body 3 to the main nozzle 11, for example, from the rotary yarn guide 7 to the main nozzle 11, the feeler 14 , 15 or the main nozzle feeler 19 detects the state, generates a fixed position stop signal B, and sends it to the drive unit 37 in addition to the loom control system.

When there is a yarn break between the storage drum 8 and the main nozzle 11, and the weft yarn 2 still remains wound on the storage drum 8, the remaining weft yarn 2
Is removed from the storage drum 8 manually or by an excluding device, and the rotary yarn guide 7 is removed.
After setting the tip of the weft thread 2 to an appropriate length inside the machine, the next operation described later is started.

When the weft yarn 2 is cut between the yarn feeder 3 and the rotary yarn guide 7, the yarn feeding feeler 5 detects the state and generates the fixed position stop signal B as in the above.
At this time, the weft yarn 2 wound around the storage drum 8
The remaining yarn of the yarn is automatically removed from the storage drum 8 by the above-mentioned removing device, and then the weft yarn 2 from the yarn feeder 3 is guided by an automatic threading means, for example, the invention of Japanese Patent Application No. 59-165338. Through the inside of the rotating yarn guide 7. After this, the following operations are started.

At that time, the drive unit 37 connects the comparison operation circuit 30 to the motor driver 36 by switching the changeover switch 35. The rotational position of the feeder motor 18 during this time is detected by the encoder 29, converted into a signal of a predetermined pulse train by the position detecting means 38, and then input to the comparison operation circuit 30. During this operation, since the switch 33 is first set to the ON state, the comparison calculation circuit 30 is
When it is confirmed from 38 that the number of pulses corresponding to the first stop position P ₁ of the setting device 31 is confirmed, the rotation of the feeder motor 18 is stopped by the motor driver 36.

At the time of this stop, the rotary yarn guide 7 is in the first stop position P ₁ and corresponds to the opening portion of the yarn holding member 21, as shown in FIGS. 2 and 3. In this state, the yarn holding member 21 sucks a piece of the weft yarn 2 into the inside together with the air flow by the suction air generation source 24, holds the end portion of the weft yarn 2, and temporarily fixes it.

After that, switch 33 turns off and switch 34
Is turned on, the motor driver 36 rotates the feeder motor 18 again. During this period, similarly to the above, the comparison calculation circuit 30 determines the second stop position P ₂ and stops the rotary yarn guide 7 at the rotation angle of the second stop position P ₂ . In this manner, the weft yarn 2 is stretched in a straight line between the rotary yarn guide 7 and the yarn holding member 21, and is in a state of intersecting with the movement path of the yarn threading member 22.

After that, the air cylinder 25 receives the driving fluid from the outside, moves the piston rod 26 from the retracted position to the advanced position, and the threading member 22 at the tip causes the air between the rotary yarn guide 7 and the thread holding member 21. While sandwiching the weft thread 2,
Guide to the inlet side of the main nozzle 11. In this process, the cutter 27 cuts the weft thread 2 between the thread holding member 21 and the threading member 22 to release the end portion of the weft thread 2 from the constraint of the thread holding member 21. The cutter 27 can be omitted if the thread holding member 21 does not firmly fix the end of the weft thread 2 and holds it in a disengaged state by a so-called loose clamp.

In this way, the weft thread 2 from the rotary yarn guide 7 is
Is guided to the inlet side of the main nozzle 11 by the threading member 22, and is drawn into the main nozzle 11 along with the airflow in the threading direction.

As described above, since the weft yarn 2 is drawn from the rotary yarn guide 7 into the inside of the main nozzle 11, the rotary yarn guide 7 makes a rotary motion at this time to store the new weft yarn 2 again. The drum 8 is ready to be wound around the outer peripheral surface of the drum 8.

At this point, the fixed position stop signal B disappears, and the changeover switch 35 enters a state in which the winding amount control signal A can be input to the motor driver 36. Therefore, the motor driver 36 receives the winding amount control signal A, and the feeder motor 18 Is driven to give a predetermined amount of rotary motion to the rotary yarn guide 7, so that the weft yarns 2 having the number of windings necessary for preliminary winding are stored in the storage drum 8.
Wrap around the outer peripheral surface of.

The thread holding operation of the thread holding member 21, the movement movement of the threading member 22, the cutting operation of the cutter 27, and the like are executed by sequence control while confirming the movement of each part. Further, on / off of the switches 33 and 34 are controlled by the function of the control device of the loom, but can also be executed under program control by a dedicated controller.

Modification of the Invention In the above embodiment, the thread holding member 21 is constructed as a pipe capable of sucking, but the thread holding member 21 may be a means for frictionally sandwiching the end portion of the weft thread 2. . Further, the threading member 22 is not limited to a frictional holding means, but may be constituted by, for example, an airflow holding means.

INDUSTRIAL APPLICABILITY The method and apparatus of the present invention are not limited to only when the weft yarn breaks between the weft yarn feeder and the main nozzle, but can also be used when the weft yarn for starting the loom is passed from the yarn feeder to the main nozzle. Is.

Effect of the Invention In the present invention, the end of the weft yarn on the side of the rotary yarn guide is held by the yarn holding member, and then the rotation of the rotary yarn guide causes the end of the weft yarn to cross the movement path of the threading member. The end of the weft thread is securely held by the threading member when the threading member is subsequently advanced, and the forward end of the weft thread is accurately guided to the inlet side of the main nozzle by the forward movement of the threading member. Therefore, threading is reliably performed from the weft thread storage device side to the main nozzle for weft insertion. Therefore, the subsequent preliminary winding operation in the weft yarn storage device can be automatically performed.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a weft yarn storage device, FIG. 2 is a front view of a main part of an automatic restoration device of the present invention, FIG. 3 is a plan view of the device, and FIG. 4 is a block of a rotation controller. It is a diagram. 1 ... weft storage device, 2 ... weft, 3 ... yarn feeder,
7 ... Rotating yarn guide, 8 ... Storage drum, 9 ... Locking pin, 11 ... Main nozzle, 18 ... Feeder motor,
20: Automatic restoration device, 21: Thread holding member, 22: Threading member, 23 ... Rotation controller, 29 ... Encoder, 30 ... Comparison arithmetic circuit, 31, 32 ... Setting device, 35 ... … Changeover switch, 36 …… Motor driver, 38 …… Position detection means.

Claims (2)

[Claims] 1. A weft yarn is wound around a storage drum in a stationary state by a rotating motion of a rotary yarn guide to store the weft yarn while measuring the length thereof, and locking and unwinding of the weft yarn on the storage drum is performed by the storage drum. In a weft yarn storage device of a type that uses a locking pin that can move back and forth with respect to the peripheral surface, when the weft yarn breaks between the weft yarn feeder and the main nozzle, the rotary yarn guide corresponds to the following yarn holding member. After stopping at the first stop position, the weft yarn end portion in the rotating yarn guide is held by the yarn holding member, and then the rotating yarn guide is rotated again to the second stop position, whereby the weft yarn is threaded. An automatic restoration of weft thread characterized by being interposed in the movement path of the threading member, and then holding the weft thread by the movement of the thread threading member and guiding it to the main nozzle for weft insertion. Method. 2. A weft yarn is wound around the outer peripheral surface of a stationary storage drum by a rotary motion of a rotary yarn guide to store the weft yarn while measuring the length thereof, and locking and unwinding of the weft yarn on the storage drum is performed by the storage drum. In a weft yarn accumulating device of a type that uses a locking pin that can advance and retreat with respect to the peripheral surface, when the weft yarn is broken, the rotary yarn guide is stopped at a first stop position corresponding to a yarn holding member described below.
Between the rotation controller for rotating to the second stop position, the yarn holding member for holding the weft yarn end portion in the rotating yarn guide at the first stop position, and between the yarn holding member and the rotating yarn guide at the second stop position. An automatic weft thread repairing device, comprising: a threading member that holds the weft thread stretched around the thread and guides it to a main nozzle for weft insertion.