JPH0259099B2 - - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a weft yarn storage device for a fluid jet loom, and particularly to a weft yarn storage device for a fluid jet loom, and particularly for supplying a new weft yarn end when the weft yarn breaks between a yarn feeder and a main nozzle during weaving. The present invention relates to a method and an apparatus for preliminarily winding a weft thread around the outer peripheral surface of a storage drum of a storage drum that draws the thread body.

Prior Art As prior art to the present invention, there are inventions of Japanese Patent Publication No. 45-26590 and Japanese Patent Publication No. 46-25543. In all of these inventions, the end of the weft thread is drawn in and guided to a predetermined position by means of an air flow. However, in these conventional technologies, the operation is not automated, and when the weft yarn breaks between the yarn feeder and the main nozzle during weaving, a rotating yarn guide or the like is placed on the outer circumferential surface of the storage drum of the storage device. Therefore, the required number of turns must be manually wound. Under these circumstances, automatic preliminary winding processing is desired when the weft yarn breaks between the yarn supplying body and the main nozzle.

OBJECTS OF THE INVENTION AND SOLUTIONS THEREOF Therefore, an object of the present invention is to automatically place the end of a new weft yarn on the outer peripheral surface of the storage drum when the weft yarn breaks between the yarn feeder and the main nozzle during weaving. The purpose is to make it possible to wind the weft yarn, thereby eliminating the burden of preliminary winding work of the weft yarn, and making it possible to perform the process in a short time.

Therefore, when the weft yarn breaks between the yarn supplying body and the main nozzle, the present invention pulls the new weft yarn from the yarn supplying body into the suction pipe through a rotating yarn guide stopped at a predetermined position, and maintains the drawn-in state. By rotating the rotating yarn guide while holding the weft yarn, it is possible to preliminarily store the required number of turns of the weft yarn on the outer peripheral surface of the storage drum. Since such a storage operation is automatically performed when the weft yarn breaks between the yarn supplying body and the main nozzle, the pre-winding operation of the weft yarn is automated and the processing time required for this operation is shortened.

Configuration of the Invention Hereinafter, the configuration of the present invention will be specifically described based on an embodiment shown in the drawings.

The present invention is based on the existence of a weft yarn storage device 1 as shown in FIG. This weft yarn storage device 1 pulls out the weft yarn 3 from, for example, two yarn supply bodies 2a and 2b. That is, the end of one yarn supplying body 2a on the side where the weft yarn 3 is drawn out reaches the rotating yarn guide 6 through the inside of the guide tubes 4 and 5. The weft thread 3 at the drawing end of the yarn supplying body 2a is connected to the drawing end of the other yarn supplying body 2b, and is held between them by two clampers 7a and 7b, and is held by two clampers 7a and 7b. , 8b, it is ready to be cut.

Further, the guide tube 4 is inserted into a fixed guide tube 5 and is slidably assembled, and its open end can be moved to an intermediate position between the clampers 7a and 7b by a driving cylinder 9. It's becoming like that. Note that a photoelectric thread breakage sensor 44, for example, is provided at the open end.

Further, a nozzle body 10 is provided in the middle of the guide tube 5. As shown in FIG. 2, this nozzle body 10 is provided with a plurality of nozzle holes 12 inclined in the weft insertion direction and a plurality of nozzle holes 13 inclined in the opposite direction at the center guide hole 11. .
These nozzle holes 12 and 13 are connected to the piping 1, respectively.
4, 15, on-off valves 16, 17, throttle valves 18, 19
It is connected to a pressurized air source 20 via.

The rotating yarn guide 6 then wraps the weft yarn 3 around the storage drum 41. This weft thread 3
The locking and unwinding of the storage drum 41 is performed by a locking pin 42 that is provided so as to be freely retractable from the inside or outside of the storage drum 41. The driving source for this locking pin 42 is
It is composed of a cam mechanism or an electromagnetic coil that takes in rotational force from the main shaft 26. Further, the weft yarn 3 is guided from the storage drum 41 to a main nozzle 43 for weft insertion. And storage drum 41
For example, a photoelectric yarn breakage sensor 45 is provided between the main nozzle 43 and the main nozzle 43 .

As shown in FIG. 3, the end of the guide tube 5 is
It is held by a support body 21, and a rotating shaft 22
It faces the thread guide hole 23. The rotating shaft 22 is rotatably supported by a bearing 25 on a fixed frame 24, etc., and is driven by the main shaft 26 of the loom via a clutch 39 at an appropriate rotation ratio. In addition, it can also be driven by the pre-winding motor 27 via the clutch 40. An encoder 28 is connected to the rotating shaft 22, so that the rotating yarn guide 6 can always stop at a predetermined rotation angle. Such control of the rotation and stop angle of the pre-winding motor 27 is performed by the control circuit 29.

In addition to the yarn breakage sensor 45, the automatic prewinding device 30 of the present invention includes a suction pipe 31 as a main part, as shown in FIG. This suction pipe 31 is connected to the rotating yarn guide 6
At the stop position, a flap-shaped suction port 32 is formed at a portion corresponding to the opening surface, and the rear end portion is connected to a suction source 33 such as a vacuum pump. The length L of this suction pipe 31 is set to be longer than the distance between the storage drum 41 of the weft storage device 1 and the main nozzle 43 for weft insertion. A pair of clampers 34 are provided at an intermediate position inside the suction pipe 31, and a photoelectric sensor 35, for example, is provided at the rear end. The clamper 34 is means for holding the weft thread 3, and can be driven by, for example, an electromagnetic solenoid 36. Further, the output of the sensor 35 is connected to a lighting control circuit 37 for lighting a display lamp 38.

Effect of the invention Next, along with the operation of the weft yarn storage device 1,
The operation of the automatic prewinding device 30 of the present invention will be explained.

The weft yarn 3 pulled out from the yarn supplying body 2a is
As shown in the figure, the guide tube 4, the guide tube 5, the guide hole 11 of the nozzle body 10, and the rotating shaft 22 in the retreated position.
The yarn reaches the rotating yarn guide 6 through the yarn guide hole 23, exits from there, and is wound around the outer peripheral surface of the storage drum 41. When the locking pin 42 protrudes from the outer circumferential surface of the storage drum 41, the weft yarn 3 is locked therein, so the rotating yarn guide 6 rotates to keep the required number of turns of the weft yarn 3 stationary. It is sequentially wrapped around the outer circumferential surface of the storage drum 41 in the state. At this time, the weft yarn 3 is locked by the locking pin 42 and has reached the main nozzle 43 for weft insertion. When the locking pin 42 retreats,
Since the stored weft yarn 3 is unwound, the weft insertion main nozzle 43 wefts the unwound weft yarn 3 together with the weft insertion fluid into the weft. Such storage operation and wefting operation are always performed in synchronization with the rotation of the main shaft 26 of the loom. During this weaving, the on-off valve 16 is opened and an air flow in the opposite direction to the weft insertion direction is introduced from the nozzle hole 13, so that an appropriate tension is applied to the weft thread 3 being drawn out. Of course, this tension can be set to an appropriate value by adjusting the throttle state of the throttle valve 18.

By the way, when the weft yarn 3 breaks between the yarn feeder 2a and the rotating yarn guide 6, the yarn breakage sensor 44
The thread breakage condition is detected by . after that,
Clutch 39 between the loom main shaft 26 and the rotating shaft 22
is disengaged, the clutch 40 is engaged, and the rotating shaft 22 is rotated by the pre-winding motor 27, the guide tubes 4, 5
The weft thread 3 connected to the main nozzle 43 inside and on the drum 41 is completely removed by the main nozzle 43 and a weft thread removing device (not shown), and the sensor 45 between the drum 41 and the main nozzle 43 outputs a signal. . Thereafter, when the rotating yarn guide 6 stops at a position facing the suction pipe 31, the cylinder 9 moves the guide tube 4 so that its open end is connected to the new yarn supply body 2b as shown in FIG.
Bring it close to the end of the weft thread 3. In this state, when the on-off valve 17 is turned on and pressurized air is injected from the nozzle hole 12, an air flow in the suction direction is generated inside the guide tube 4. When the weft thread 3 is cut between 7a and 7b and the clamper 7b releases the weft thread 3,
The end of the weft yarn 3 is drawn into the guide tube 4, passed through the guide tube 5, blown into the rotating yarn guide 6, and simultaneously blown into the suction pipe 31 facing the outside from its tip. , is sucked by the suction pipe 31. Suction pipe 31
When the liquid is inhaled for a certain length, the sensor 35 outputs a signal and closes the on-off valve 17. Thereafter, by rotating the rotary yarn guide 6 while holding the weft yarn 3 inside the suction pipe 31, the clamper 34 can preliminarily store the required number of turns of the weft yarn 3 on the outer peripheral surface of the storage drum 41. That's what I do. In this way, the threading operation is performed automatically.

On the other hand, when the weft yarn breaks between the storage drum 41 of the weft storage device 1 and the main nozzle 43 for weft insertion, the yarn breakage sensor 45 detects this and stops the loom. Thereafter, the rotating shaft 22 is first separated from the main shaft 26 by the clutch 39, and the pre-winding motor 27 is then moved to the clutch 40.
, the rotating yarn guide 6 is given reverse rotation, and the weft yarn 3 remaining on the storage drum 41 is moved from the on-off valve 16 flowing through the guide tubes 4 and 5 toward the yarn supplying bodies 2a and 2b. The yarn feeder 2 is placed on the airflow of
When discharged to the suction device (not shown) on the sides a and 2b,
A thread breakage sensor 44 issues a signal. Thereafter, based on this, the threading operation is automatically performed in the same procedure as the automatic weft threading when the weft thread breaks between the yarn supplying bodies 2a, 2b and the guide tubes 4, 5.

At this time, the weft yarn 3 at the tip of the rotating yarn guide 6 enters the inside of the suction pipe 31 from the suction port 32 due to the suction air flow, as shown in FIG. When the weft thread 3 is detected inside the suction pipe 31 by the sensor 35, the lighting control circuit 37 lights up the indicator lamp 38.
This allows the threading condition to be visually confirmed from the outside.

Thereafter, the electromagnetic solenoid 36 is turned on, and the pair of clampers 34 close, thereby gripping the internal weft thread 3. Thereafter, the pre-winding motor 27 rotates in the winding direction, giving rotational movement to the rotating yarn guide 6 for the required number of turns, and winding the weft yarn 3 around the outer peripheral surface of the storage drum 41. At this time, regardless of whether the locking pin 42 is advanced or retracted, the weft thread 3 is held at one end by the pair of clampers 34 and wound around the outer peripheral surface of the storage drum 41. When the pre-winding of the required number of turns is completed, the pre-winding motor 27 is controlled by the control circuit 29.
under control and automatically stops. This series of operations is performed depending on the weft thread breakage condition and the encoder 2
8. This can be done automatically by using a sequence circuit or the like using the output signal of the sensor 35 or the like as an input condition.

Other Embodiments of the Invention The suction pipe 31, which is the main part of the invention, may be fixed at a position corresponding to the rotating yarn guide 6, or may be provided so as to be movable forward and backward using a moving cylinder or the like. In the above embodiment, when the pre-winding motor 27 rotates, the weft thread 3 in the suction pipe 31 is held by the pair of clampers 34, but instead of the clampers 34, the weft thread 3 is held by the suction force of the suction source 33. It is also possible to hold the weft yarn 3.

Effects of the Invention In the present invention, when the weft thread breaks between the yarn feeder and the main nozzle, the end of the weft thread is drawn into the suction pipe and held there, regardless of the state of the locking pin. By rotating the rotating yarn guide a predetermined number of times, the required length of weft yarn can be preliminarily stored on the outer circumferential surface of the storage drum, eliminating the need for pre-winding work by workers, resulting in labor savings. Also, the period during which the loom is stopped can be shortened.

[Brief explanation of the drawing]

Figure 1 is a schematic plan view of the weft yarn storage device, Figure 2 is a schematic plan view of the weft yarn storage device;
3 is a sectional view of the main part of the weft yarn storage device, FIG. 4 is a sectional view of the automatic pre-winding device, and FIG. 5 is a plan view of the weft threading device. 1... Weft storage device, 3... Weft, 6...
Rotating yarn guide, 27...Preliminary winding motor, 2
8... Encoder, 30... Automatic preliminary winding device,
31... Suction pipe, 32... Suction port, 33...
Suction source, 34... clamper, 35... sensor.

Claims (1)

[Claims] 1. A weft yarn is wound around the outer peripheral surface of a stationary storage drum by the rotational movement of a rotating yarn guide, its length is measured, and stored, and the weft yarn is locked and unwound on the storage drum by the rotational movement of a rotating yarn guide. In a weft yarn storage device of the type using a locking pin that can freely move forward and backward, when the weft yarn breaks between the yarn supplying body and the main nozzle, the rotating yarn guide is stopped at a position corresponding to the suction pipe, and then this The weft yarn in the rotating yarn guide is drawn into the suction pipe by an air flow, the weft yarn in this drawn state is held, and then the rotating yarn guide is rotated a predetermined number of turns, and a predetermined number of turns is applied to the outer peripheral surface of the storage drum. An automatic pre-winding method for weft yarn, characterized by preliminarily storing a number of turns of weft yarn. 2 The weft yarn is wound around the outer peripheral surface of the storage drum in a stationary state by the rotational movement of the rotating yarn guide, the length is measured, and the yarn is stored. In a weft yarn storage device using a locking pin, there is a yarn breakage sensor that detects weft yarn breakage between the yarn supply body and the main nozzle for weft insertion, and a yarn breakage sensor that detects weft yarn breakage between the yarn supply body and the main nozzle for weft insertion. a stopping means for stopping the rotating yarn guide at a predetermined rotation angle when cutting; a suction pipe that corresponds to the rotating yarn guide at the stopping position and that draws the weft therein by a suction air flow; The present invention is characterized by comprising a sensor for detecting the presence or absence of a weft thread, a holding means for holding the weft thread drawn into the suction pipe, and a pre-winding motor for imparting rotational motion to the rotating yarn guide. Automatic weft pre-winding device.