JPH0577772B1 - - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to fluid jet looms, and more particularly to a method and apparatus for automatically passing the end of a weft yarn wound around a storage drum into a main nozzle.

Prior Art For example, Japanese Unexamined Patent Publication No. 53-38749 discloses a device for drawing a measured weft yarn through a weft insertion nozzle. The weft thread pulling device uses a drum-type weft thread storage device because the weft thread after length measurement is stored in a loop shape inside the storage tube by air flow and then guided to the weft insertion nozzle. Not applicable.

On the other hand, although drum-type weft storage devices are often used, there is no method or device for threading the weft in a drum-type weft storage device, and it is desired to complete such a method and device for automation.

Purpose of the Invention The object of the present invention is to provide a drum-type weft storage device that automatically passes the weft wound around the outer periphery of the storage drum to the main nozzle for weft insertion, and sets the loom in a state where it can be started. It is to be.

SUMMARY OF THE INVENTION Therefore, the present invention has been proposed by drawing the drawer side end of the weft wound around the outer periphery of the storage drum into a suction pipe, and by moving the suction pipe, the drawer side of the weft is connected to the entrance of the main nozzle. After moving the weft to the side, the end of the weft is brought closer to the inlet of the main nozzle by the first and second guide members, cut at an appropriate position, and then opened. The suction action of the material causes the material to be drawn into the interior of the material.
Since this operation of pulling the weft thread through the main nozzle is automatically performed between the storage drum and the main nozzle, the work of threading the weft thread through the main nozzle is labor-saving and the time required for the work can be 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 drum-type weft yarn storage device 1 as shown in FIG. This weft yarn storage device 1 includes, for example, two yarn supply bodies 2a and 2b.
Pull out the weft thread 3. That is, the end of one yarn feeder 2a on the drawer side of the weft yarn 3 is connected to the guide tube 4,
5 and reaches a rotating yarn guide 6. 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 winds the weft yarn 3 around the storage drum 41, as shown in FIG. 3 as well as in FIG. This locking and unwinding of the weft yarn 3 is performed by a locking pin 42 provided so as to be movable forward and backward from the inside or outside of the storage drum 41. The driving source of this locking pin 42 is the main shaft 26.
It consists of a cam mechanism or electromagnetic coil that takes in rotational force from the motor. Furthermore, the weft thread 3 is
Main nozzle 4 for horizontal filling from storage drum 41
Guided by 3. A photoelectric yarn breakage sensor 45, for example, is provided between the storage drum 41 and the main nozzle 43.

The end of the guide tube 5 is connected to a support 21 screwed to a fixed frame 24, as shown in FIG.
The thread guide hole 23 is held by the thread guide hole 23, and is loosely fitted concentrically and close to the end surface of the thread guide hole 23 of the rotating shaft 22. 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 a pre-winding motor 27 via the clutch 40. Note that an encoder 28 is attached to the rotating shaft 22.
is connected 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.

The weft threading device 30 of the present invention has a fourth
As shown in the figure, the main part is the suction pipe 3.
1. A first guide member 46 and a second guide member 47 are provided as guide members. This suction pipe 31 is located at the stop position of the rotating yarn guide 6, and has a flap-shaped suction port 32 at a portion corresponding to its opening surface.
It is rotatably supported by a support shaft 48 at its rear end portion, and 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 this suction pipe 31, and a photoelectric sensor 34, for example, is provided at the rear end.
5 is provided. The clamper 34 described above can be driven by, for example, an electromagnetic solenoid 36, and the output of the sensor 35 is connected to a lighting control circuit 37 for lighting an indicator lamp 38.

Further, the first guide member 46 is attached to the tip of the piston rod 50 of the air cylinder 49, for example. This air cylinder 49 is attached to the side surface of the suction pipe 31 in this embodiment. Further, the second guide member 47 includes a guide 51 parallel to the center line of the main nozzle 43, and a slider 52 that is slidable in the axial direction with respect to the guide 51.
The main nozzle 43 is held on the center line of the main nozzle 43. The second guide member 47 supports the cutter 56 on the side of the suction pipe 31, and forms a recess 53 that is open on the upper and lower surfaces at a portion corresponding to the inlet side of the main nozzle 43, and has a recess 53 at the center thereof. As seen in FIGS. 8 and 9, the pusher 54 is housed in the recess 53 in a protrusive manner. This pusher 54 is driven by, for example, an electromagnetic solenoid 55 attached to the back side of the second guide member 47. Note that, for example, a photoelectric sensor 57 and a cutter 58 are provided at the tip of the main nozzle 43.

Effect of the invention Next, along with the operation of the weft yarn storage device 1,
The operation of the weft threading 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 is broken between the yarn supplying body 2a and the rotating yarn guide 6, the yarn breakage state is detected by a pair of yarn breakage sensors 44.
Thereafter, the loom stops at an appropriate angle, the clutch 39 between the main shaft 26 of the loom 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 weft yarn 3 connected to the main nozzle 43 inside the storage drum 41 and on the storage drum 41 is completely removed by the main nozzle 43 and a weft removal device (not shown), and the sensor 45 between the storage drum 41 and the main nozzle 43 outputs an output. issue. After that, the rotating yarn guide 6
stops at a position facing the suction pipe 31,
The suction source 33 of the suction pipe 31 is activated, and the cylinder 9 moves the guide tube 4, bringing its open end closer to the end of the weft yarn 3 of the new yarn supplying body 2b, as shown in FIG. In this state, when the on-off valve 17 is turned on and pressurized air is injected from the nozzle hole 12,
Since an air flow in the suction direction is generated inside the guide tube 4, the weft yarn 3 of the yarn feeder 2b is cut by the cutter 8a between the clampers 7a and 7b, and when the clamper 7b releases the weft yarn 3, the weft yarn 3 is removed. 3 is drawn into the inside of the guide tube 4, through the guide tube 5, into the inside of the rotating yarn guide 6, and from its tip into the suction pipe 31 facing the outside. When a certain length is sucked into the suction pipe 31, a pair of sensors 35 output an output.
Close the on-off valve 17. Thereafter, the clamper 34 holds the weft thread 3 inside the suction pipe 31, and the on-off valve 16 is turned on.
By rotating the rotary yarn guide 6 while applying an appropriate tension to the weft yarn 3 between the weft yarn feeder 26 and the yarn supplying body 26, the encoder 28 detects the required number of turns of the weft yarn 3 on the outer circumferential surface of the storage drum 41. This allows for preliminary storage. In this way, the threading operation from the yarn supplying body 2b to the rotating yarn guide 6 is automatically performed.

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,
The yarn breakage sensor 44 outputs an output and the yarn feeder 2a,
The threading operation is automatically performed in the same procedure as the automatic weft threading when the weft thread breaks between the weft thread 2b and the guide tubes 4 and 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.

Next, the electromagnetic solenoid 36 is turned on, and the pair of clampers 34 close inside the suction pipe 31 to grip the weft thread 3 inside. Thereafter, the pre-winding motor 27 rotates again to give rotational movement to the rotating yarn guide 6 for the required number of turns, and the weft yarn 3 is wound 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 placed under the control of the control circuit 29 and automatically stops.
Such a series of operations can be performed automatically by using a sequence circuit or the like using the weft thread breakage state and output signals from the encoder 28, the sensor 35, etc. as input conditions.

Then, after the clamper 34 releases the weft thread,
The suction pipe 31 is attached to a support shaft 48 as shown in FIG.
The suction port 32 is rotated around the main nozzle 43 to bring the suction port 32 closer to the inlet side of the main nozzle 43. Although not shown, the suction pipe 31 is driven by a pulse motor, an air cylinder, or the like. In this state, the air cylinder 49 is connected to its piston rod 50.
In order to advance the weft thread 3 between the storage drum 41 and the suction pipe 31, the first guide member 46 moves the weft thread 3 between the storage drum 41 and the suction pipe 31 in the advancing direction of the piston rod 50, as shown in FIGS. 46
The weft thread 3 between the main nozzle 43 and the suction pipe 31 crosses the center line of the main nozzle 43 and is located between the main nozzle 43 and the second guide member 47.

After doing this, the second guide member 47
It is guided by the slider 52 and approaches the inlet side of the main nozzle 43. Although not shown, this slider 52 is provided by, for example, an air cylinder. This second guide member 47 is the main nozzle 43
In the process of approaching the main nozzle 43, the weft thread 3 enters the inside of the recess 53, as shown in FIG.
Move to the entrance side.

Subsequently, the electromagnetic solenoid 55 operates to press the pusher 54 against the inlet side of the main nozzle 43, thereby causing the weft thread 3 to face the inlet side of the main nozzle 43, as shown in FIG. In this state,
Since the cutter 56 cuts the weft thread 3 between the suction pipe 31 and the second guide member 47, the weft thread 3 is in a state where it can be drawn into the main nozzle 43. At this time, since the main nozzle 43 generates a suction air flow, the cut weft yarn 3 is released by the pusher 54, and then the first guide member 46 returns to its original position, so that the main nozzle 43 is drawn into the interior from the entrance side.

In this way, the weft thread 3 passes through the main nozzle 43
After being passed through, the suction pipe 31 and the second guide member 47 return to their original positions. The state of the weft thread 3 in this drawn state can be electrically detected by a pair of sensors 57 provided at the tip of the main nozzle 43. At the tip of this main nozzle 43, the weft thread 3 is cut into a cutter 58 to an appropriate length.
cut by. In this way, the loom is automatically set to a state where it can be started.

Other Embodiments of the Invention In the above embodiment, the pusher 54 only releases the weft thread 3, but in the embodiment shown in FIG. An example is shown in which the main nozzle 43 is actively pushed out. That is, a plurality of nozzle holes 59 are provided in the pusher 54, take in pressurized air from the pressurized air source 60, and generate an air flow toward the inlet side of the main nozzle 43 when the weft thread 3 is passed through.

In addition, the second guide member 47 in the embodiment only partially restrains the weft thread 3 and guides it near the main nozzle 43;
As shown in FIG. 11, it is composed of an air guide 64 having a nozzle function and a clamper 61, and the weft yarn 3 sucked by the air guide 64 is sandwiched between the clampers 61 and guided to the entrance side of the main nozzle 43. You may also do so.

Furthermore, the passing state of the main nozzle 43 is determined by rotating the main nozzle 43 by an appropriate angle with an air cylinder or the like, as shown in FIG.
The tip of the weft thread 3 may be drawn into the interior by an air flow therein, checked by a pair of sensors 63 located in the middle of the suction pipe, and then cut by the cutter 56.

Effects of the Invention In the present invention, the end of the weft yarn wound around the storage drum is guided in the direction of the main nozzle by the suction pipe, and the end of the weft yarn wound around the storage drum is guided in the direction of the main nozzle by the action of the first guide member and the second guide member. Since it is automatically guided to the entrance side, it is possible to automate and save labor in threading the weft thread through the main nozzle. Particularly, since the suction pipe can also be used for threading the weft yarn through the main nozzle in conjunction with the preliminary winding operation, the preliminary winding operation of the weft yarn and the operation of threading the weft yarn through the main nozzle can be performed continuously.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of a drum-type weft yarn storage device, FIG. 2 is a cross-sectional view of the nozzle body, FIG. 3 is a cross-sectional view of the main part of the weft yarn storage device, and FIG. 4 is a weft threading device of the present invention. 5 is a plan view when threading the guide tube, FIGS. 6 and 7 are side views when threading the guide tube, and FIGS. 8 to 10 are explanations of the operation. 11 and 12 are plan views of parts of other embodiments. 1... Drum type weft storage device, 3... Weft, 6... Rotating yarn guide, 30... Weft threading device, 31... Suction pipe, 33... Suction source,
41... Storage drum, 42... Locking pin, 43...
...Main nozzle, 46...First guide member, 47
... Second guide member, 54 ... Pusher, 56
...Katsuta.

Claims (1)

[Scope of Claims] 1. A process of drawing the draw-out side end of the weft wound around the storage drum into the suction pipe, and the movement of the suction pipe causes the draw-out side end of the weft to be brought to the entrance side of the main nozzle. In the moving process, the movement of the guide member causes the weft threads in the suction pipe to intersect on the center line of the main nozzle, and the movement of the guide member on the center line of the main nozzle causes the crossed weft threads to approach the entrance of the main nozzle. and a step of cutting the weft between the guide member and the suction pipe, and then drawing the end of the weft into the main nozzle by the suction action of the main nozzle. Threading method. 2. A suction pipe which is movably provided between the storage drum and the main nozzle and which draws the draw-out side end of the weft wound around the storage drum into the interior by an air flow in the drawing direction, and the weft inside this suction pipe. a first guide member that is moved in a direction that intersects the center line of the main nozzle; and a second guide that guides the weft between the suction pipe and the first guide member toward the inlet side of the main nozzle on the center line of the main nozzle. A device for threading a weft thread through a main nozzle, comprising: a member; and a cutter for cutting the weft thread between the second guide member and the suction pipe.