JP2561087B2 - Feeding system guide device for shuttleless loom - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a device for automatically guiding a weft yarn from a yarn feeder to a predetermined position in a shuttleless loom.

2. Description of the Related Art The patent applicant has proposed in the invention of Japanese Patent Laid-Open No. 61-47849 a method of supplying a weft yarn of a new yarn feeder to a length measuring and storing device in a threading state at the time of yarn breakage during weaving. In the threading method, the weft thread must be pre-positioned at the thread feeding position, which necessitates a plurality of clampers and the like, and this clamper generates frictional resistance against the thread during thread guiding. Therefore, the drawing operation of the yarn by the air flow is not reliably performed, which may cause a malfunction.

Therefore, an object of the present invention is to guide the yarn end of the yarn supplying body at the yarn supplying position by the air flow and guide it to the length measuring and storing means in a state where the weft yarn is not restrained by the clamper at the yarn supplying position. Is to

Means for Solving the Invention In the above-mentioned conventional example, since the weft yarn is positioned at a position separated from the yarn feeder, a clamper or the like is required for the positioning. However, if the weft yarn remains wound around the yarn feeder, the end portion of the weft yarn on the pull-out side is present at least at the outer peripheral position of the yarn feeder. Therefore, the withdrawal of the end portion of the weft thread may be performed at least at the outer peripheral position of the yarn feeder.

Focusing on the above points, the present invention provides a feeding means for guiding a plurality of weft yarn feeders one by one to a yarn feeding position, and cutting or feeding of a yarn feeder at a yarn feeding position in the middle of the weft yarn. A thread sensor for detecting a yarn empty state due to the sky, a guide body provided with an opening so as to be able to advance and retreat so that the opening approaches the outer peripheral surface of the yarn supply body at the yarn supply position, and the guide body Noise that generates an air flow in the direction from the opening to the inside, a yarn guide tube that guides the weft yarn drawn into the guide body to a predetermined position, and the feed means and the guide body based on the signal from the yarn sensor. A controller for controlling the operation of the nozzle and the yarn feeding guide device in the shuttleless loom.

Here, the guide body is of a type that completely surrounds the entire outer peripheral surface of the new yarn feeder, and is partially opened along the generatrix direction of the yarn feeder. It can be roughly classified into a type that performs a relative rotational movement with the body.
In any case, the guide body approaches the outer peripheral surface of the yarn feeder at one time or with the passage of time due to rotation,
The winding end of the weft thread is drawn in by the air flow in the drawing direction.

According to such a pull-in guide means, the yarn feeder may be positioned at the yarn feeding position, and therefore, the weft yarn of the yarn feeder does not need to be restrained by a clamper as in the conventional case. The weft threads of the plurality of yarn feeders may be independent from each other between the adjacent yarn feeders, or may be in a knotting state, that is, a transfer tail state.

Embodiment 1 (FIG. 1) The embodiment of FIG. 1 is a basic yarn feeding guide device 1 of the present invention.
Is shown.

The weft yarn 2 is pulled out from one of the plurality of yarn feeders 3 independent from each other at the yarn feeding position, enters the inside of the funnel-shaped suction guide body 4 as a guide body on the same axis, and the suction is performed. After passing through the inside of the yarn guiding tubes 5a and 5b connected to the neck portion of the guide body 4, a predetermined position, for example, a drum type length measuring and storing means 6 is provided.
After being wound around the outer periphery of the drum 62 by the rotating yarn guide 61 and unwound by the pin 63, it is wefted by a weft insertion means such as a nozzle (not shown).

The yarn supplying body 3 is detachably supported at a predetermined pitch with respect to the holder 8 of the winding body 7 as a feeding means. In this embodiment, the weft threads 2 are not knitted between the adjacent yarn feeders 3 and are in an independent state. The wrapping body 7 as the feeding means
Is wound between a pair of wheels 9, one of which is the driving side and is driven by the indexing and feeding means 10 by a predetermined rotation amount.

The neck portion of the guide body 4 is connected to the yarn guiding tubes 5a and 5b which are movable in the axial direction, and is fixed to the piston rod 13 of the cylinder 12 by the connecting plate 11. The cylinder 12 is attached to a frame or the like in a state of being parallel to the yarn guiding tubes 5a and 5b, and the forward and backward movement of the piston rod 13 causes the suction guide body 4 to reciprocate between the backward and forward positions. The suction guide body 4 is provided with, for example, a pair of photoelectric type thread sensors 14 in order to detect a state of the weft thread 2 being cut off at the neck portion or the thread-free body 3 being empty. The presence or absence of the weft yarn 2 in the yarn feeder 3 at the yarn feeding position is detected by the residual yarn sensor 15. The residual thread sensor 15 is a non-contact type and is attached to a frame or the like.

Further, the yarn guiding tube 5b is provided with a suction nozzle 16 in the middle of the yarn guiding tube 5b in order to generate an air flow in the yarn guiding direction inside the suction guiding body 4. The suction nozzle 16 is connected to a pressurized air source 18 via an on / off valve 17.

On the other hand, the yarn sensor 14 and the residual yarn sensor 15 are connected to the input side of the controller 19, respectively. This controller
Reference numeral 19 denotes a microcomputer or the like, which is bidirectionally connected to a control device 20 of the loom, and is connected on the output side to a switching operation device 21 of the cylinder 12 and a drive circuit 22 for the indexing and feeding means 10. ing.

The guide operation of the weft thread 2 is performed by executing a program stored in the controller 19 in advance.

After setting the yarn feeder 3, when guiding the weft yarn 2 in the initial stage,
Upon receiving a command from the controller 19, the switching operator 21 retracts the piston rod 13 of the cylinder 12 to retract the suction guide body 4 to the position indicated by the imaginary line.
After the time required for this backward movement has elapsed, the controller 19 gives a start command to the drive circuit 22 to cause one yarn feeder 3
Is moved to the yarn feeding position, that is, the yarn feeding body 3 is opposed to the suction guide body 4, and is stopped in the positioning state. After that, the switching operator 21 receives a command from the controller 19 and advances the piston rod 13 of the cylinder 12 to move the suction guide body 4 to a position surrounding the outer peripheral surface of the yarn feeder 3 at the yarn feeding position. Move and stop there. Next, the controller 19 opens the on / off valve 17 to cause the suction nozzle 16 to generate an air flow in the yarn guiding direction inside the yarn guiding tubes 5a and 5b, so that the inside of the suction guiding body 4 is controlled. Pull in the winding end of the weft yarn 2 from the outer periphery of the yarn feeder 3,
While unwinding from the yarn feeder 3, the yarn is passed through the inside of the yarn guide tubes 5a and 5b and moved from the inside of the rotary yarn guide 61 to the outer peripheral position of the drum 62. The pulling state of the weft thread 2 can be electrically confirmed by the change in the signal level from the thread sensor 14.

After that, the weft thread 2 is preliminarily wound on the side of the length measuring and storing means 6 for a length necessary for the next weft insertion, and subsequently pulled through a weft insertion means (not shown). Such pre-winding operation and pulling operation of the weft yarn 2 can be realized by the invention of the patent applicant such as Japanese Patent Application No. 60-199540 or Japanese Patent Application No. 60-196822. In this way, the loom is thereafter set in a state in which it can start a regular weaving operation.

During operation of the loom, the weft yarn 2 is unwound from the yarn feeding body 3 inside the suction guide body 4, measured by the length measuring and storing means 6, and stored, and then, at the weft insertion timing, into the warp yarn opening. It will be put in the horizontal direction. At this time, the suction guide body 4 plays a role of a balloon breaker with respect to the weft yarn 2 being unwound, and keeps the unwinding resistance (centrifugal force) low.

During such weaving, when the yarn feeder 3 becomes empty or the weft yarn 2 is cut off midway, the yarn sensor 14 detects the yarn absence state and outputs the signal. Send to controller 19. At this time, the controller 19 first sends a signal for stopping the loom to the control device 20 of the loom to stop the loom and, depending on the presence or absence of the signal from the residual yarn sensor 15, the yarn feeder 3 at the yarn feeding position. Is determined to be empty or the weft 2 is cut. When it is determined that the yarn feeder 3 at the yarn feeding position is empty, the controller 19 first retracts the suction guide body 4 and then operates the drive circuit 22 to cause the indexing and feeding means 10 to move to the next step. By moving the new yarn feeder 3 to the yarn feeding position and performing the same operation as described above, the weft yarn 2 of the new yarn feeder 3 is guided to the length measuring and storing means 6.

When it is determined that the weft thread 3 is still left in the yarn feeding body 3 at the yarn feeding position as a result of the breakage of the weft thread 2 in the middle, the controller 19 keeps the suction guide body 4 forward. Then, an air flow in the drawing direction is generated by the suction nozzle 16 therein, and the remaining weft yarns 2 are guided to the length measurement storage means 6 in the same manner as described above. Therefore, at this time, the drive circuit 22 does not operate.

Embodiment 2 (FIGS. 2 and 3) In this embodiment, the suction guide body 4 is set in a direction intersecting with the yarn guide tubes 5a, 5b, and when the end portion of the weft yarn 2 is sucked, This is an example in which the yarn feeder 3 is given a rotational movement.

That is, the suction guide body 4 includes the suction nozzle 16 at the neck.
A timing belt 25 wound around a pair of timing pulleys 24 by a bracket 23 near a and the yarn sensor 14a is moved vertically by a feed motor 26 capable of reverse rotation. A bifurcated yarn guide member 27 is rotatably supported in a predetermined angle range by a rotary solenoid 28 at a position corresponding to the opening of the yarn guide tube 5a, and a cutter 29 is supported thereby. And can be operated by the solenoid 30.

On the other hand, the holder 8 has a vertical rotation shaft 3 on the holder 8 side.
1, and a bearing 32 on the winding body 7 side, which is rotatably supported with respect to the winding body 7, and is driven by a driven roller 33 fixed to the lower end of the rotating shaft 31.
It is designed to receive rotation from. The driving roller 34 is directly attached to the rotary shaft of the motor 35. The motor 35 is rotatably supported on a frame or the like by a swing bracket 36 and a swing shaft 37, and is driven by a solenoid 38 and a connecting pin 39.

Of course, the feed motor 26, the rotary solenoid 2
8, the solenoid 30, the motor 35, and the solenoid 38 are controlled by the controller 19 as in the above-described embodiment.

When the yarn feeder 3 is moved, the yarn guide tube 5a is retracted by the cylinder 12, and the suction guide body 4 is moved by the feed motor 26.
Due to the rotation of, it is in the raised position shown by the solid line. In this state, the indexing and feeding means 10 moves the predetermined yarn feeder 3 to the yarn feeding position along the horizontal plane. After that, the suction guide body 4 descends due to the reverse rotation of the feed motor 26, completely surrounds the outer peripheral surface of the yarn feeding body 3 at the yarn feeding position as shown by the imaginary line, and after the positioning is completed, the suction nozzle 16a. By the suction action of, the weft yarn 2 of the yarn supplying body 3 is drawn into the inside of the suction guide body 4 together with the air flow. After this positioning, the solenoidoid 38 moves the swing bracket 36 from the position indicated by the imaginary line to the position indicated by the solid line in parallel with the start of suction by the suction nozzle 16a, and the driving roller 34 is driven by the driven roller 34.
It is in contact with 33. At this point, the motor 35 receives a start command from the controller 19 and rotates the driving roller 34 and the driven roller 33, so that the yarn feeder 3 at the yarn feeding position is rotated.
Give a rotational movement to. The direction of this rotational movement is set, for example, in the direction in which the weft yarn 2 is unwound. During this time, after the thread sensor 14a confirms that the weft thread 2 has been pulled in, the controller 1
9 is a piston rod of the cylinder 12 after rotating the feed motor 26 to return the suction guide body 4 to the original raised position.
By moving 13 forward, the yarn guiding tube 5a is moved to the position indicated by the solid line, and the opening portion thereof is brought close to the weft yarn 2. After that, the suction nozzle 16 generates an air flow in the suction direction inside the yarn guiding tube 5a, so that the weft yarn 2 near the opening is pulled into the inside. At this time, the thread guide member
The rotation of the rotary solenoid 28 causes the rotor 27 to approach the opening of the yarn guide tube 5a, restrict the weft yarn 2 near the opening of the yarn guide tube 5a, operate the solenoid 30, and operate the cutter.
Cut the weft thread 2 at 29. By this cutting, the yarn feeder 3
The side weft yarn 2 is drawn into the yarn guide tubes 5a and 5b from the end together with the air flow of the suction nozzle 16. Of course, this state is detected by the thread sensor 14 as described above.

When the weft yarn 2 is cut during weaving or when the weft yarn 2 is emptied for the yarn feeder 3 at the yarn feeding position, the controller 19 controls the yarn sensor 14 and the residual yarn sensor 15 as in the above-described embodiment. The yarn breakage or the empty state of the yarn supplying body 3 is discriminated by discriminating the signal level from, and the necessary yarn guiding operation is executed based on each state.

Embodiment 3 (FIGS. 4 and 5) In this embodiment, the suction guide body 4 is constituted by an elongated hollow body, and a suction slit 40 in the generatrix direction is formed on the surface facing the yarn feeder 3, Further, the positioning sensor 41 is provided near the suction slit 40, the bracket 42 of the timing belt 25 holds the air cylinder 43, and the piston rod 44 holds the suction guide body 4. The upper end portion of the suction guide body 4 is connected to the suction nozzle 16a, and the presence of the weft thread 2 at that position is determined by the thread sensor 14a.
detected by a.

At the time of guiding the weft thread 2, the suction guide body 4 moves to the feed motor 26.
Thus, it moves to a position facing the yarn feeder 3 at the yarn feeding position and stops, and then the air cylinder 43 approaches the outer peripheral surface of the yarn feeder 3. When the suction guide body 4 approaches the outer peripheral surface of the yarn feeder 3, the positioning sensor 41 generates a signal to the controller 19. Therefore, the suction guide body 4 approaches the outer peripheral position of the yarn feeder 3 as close as possible. Stop in the state. After this positioning, the yarn feeder 3 starts to rotate in a predetermined direction in response to the rotation from the motor 35, as in the above embodiment. At the same time, the suction guide body 4 generates an air flow in the suction direction in the suction slit 40 by the suction nozzle 16a, so that the weft thread 2
Of the suction slit 40 is separated from the outer peripheral surface of the yarn feeder 3.
Get inside the. This state is detected by the thread sensor 14a of the suction guide body 4. At this point, controller 19
Rotates the feed motor 26 to move the suction guide body 4 to a position indicated by an imaginary line. During this time, the yarn feeder 3 is set in a stopped state. After the suction guide body 4 is stopped at a position facing the opening surface of the yarn guide tube 5a, an air flow in the drawing direction is generated inside the yarn guide tube 5a by the suction nozzle 16, so that the end of the weft yarn 2 is sucked. When the airflow of the guide body 4 is lost, it rides on the airflow inside the yarn guide tube 5a and is drawn into it. The motor 35 may be in a stopped state while the suction guide body 4 moves from the lowered position to the upper position, and as the suction guide body 4 moves, in order to pull out the weft threads 2 sequentially, It may be rotated in the rewinding direction in synchronization with the moving speed of the suction guide body 4.

In this embodiment, the suction slit 40 restrains the end portion of the weft thread 2 in a limited narrow range and faces the opening surface of the yarn guide tube 5 in the limited portion, so that the suction guide body 4 moves to the yarn guide tube. 5a
Delivery of the weft thread 2 to and from the weft thread 2 can be reliably performed without using the thread guide member 27 as in the above-described embodiment. The guide tube described in JP-A-61-47849 may be used, and the tension of the weft thread 2 may be controlled by the resistance of the air flow.

Embodiment 4 (FIG. 6) This embodiment is an example in which the yarn feeding body 3 at the yarn feeding position is not rotated, but instead the suction guide body 4 is rotated. That is, the suction guide body 4 is rotatably supported by the rotary joint 46 with respect to the support frame 45, and is driven by the motor 47 and the two gears 48, 49 fixed to the support frame 45. There is. The support frame 45 is attached to the tip of the piston rod 51 of the air cylinder 50, and is supported so as to be vertically movable.

At the time of guiding the weft yarn 2, the suction guide body 4 is guided by the piston rod 51 of the air cylinder 50 from the raised position to the position shown by the imaginary line, and at the portion of the suction slit 40, the suction guide body 4 and the outer peripheral surface of the yarn supply body 3 at the yarn supply position. Correspond. After this, the motor 47
Rotates the suction guide body 4 by the gears 48 and 49 to rotate the conical surface of the yarn feeding body 3, and causes the suction air flow from the suction nozzle 16a to act on the conical surface. During this time, the end portion of the weft yarn 2 is drawn into the suction slit 40 and is pulled up to the upper position by the suction nozzle 16a together with the air flow. When this state is confirmed by the thread sensor 14a, the controller 19 stops the rotation of the motor 47 at a predetermined position, causes the suction slit 40 to face the opening surface of the thread guiding tube 5a, and causes the piston of the air cylinder 50 to move. rod
By pulling up 51, the weft yarn 2 is pulled out from the outer peripheral surface of the yarn feeder 3. After that, the air cylinder 12 advances the yarn guiding tube 5a, draws the weft yarn 2 into the inside by the air flow of the suction nozzle 16, and cuts it with the cutter 29 to measure the end portion of the weft yarn 2 from the yarn feeder 3. Lead to the long storage means 6.

Also in this embodiment, the empty state of the yarn feeder 3 and the yarn-free state of the weft yarn 2 are determined by the combination of the yarn sensor 14 and the residual yarn sensor 15. In the above embodiments, the feeding means constituting the yarn feeding guide device 1 is of a type in which a plurality of yarn feeding bodies 3 are installed independently of each other, so that no yarn knotting work is required and the yarn feeding body 3 is held. Attaching to 8 has the side effect that everything can be automated.

Modification of Invention In the above embodiment, the residual thread sensor 15 is provided,
It is determined whether the yarn supplying body 3 is empty or is in a broken state, but it is not always necessary to provide the remaining yarn sensor 15, and it is unconditional when the yarn sensors 14 and 14a detect the absence of yarn. Alternatively, the next yarn supplying body 3 may be sent to the yarn supplying position, and the weft yarn 2 may be supplied from the yarn supplying body 3. In each of the above embodiments, the weft yarns 2 of the plurality of yarn feeders 3 are in an independent state. However, these weft yarns 2 are adjacent to the first and fourth embodiments in which the yarn feeder 3 is not rotated. The matched yarn feeder 3 may be in a knotting state, that is, a transfer tail state. In this case, the thread breakage state can be detected only by the thread sensors 14 and 14a.

EFFECTS OF THE INVENTION In the present invention, the opening of the guide body is brought close to the outer peripheral surface of the yarn supply body at the yarn supplying position, and an air flow from the opening of the guide body to the inside is generated by the nozzle, whereby the yarn supply body Since the weft thread end is taken into the inside of the guide together with the air flow, positioning of the weft thread on the side of the yarn feeder is not required, and the end of the weft thread existing on the outer peripheral surface of the yarn feeder can be secured inside the guide body by the air flow. Is taken into. Therefore, even when the yarn supplying body is consumed or the yarn supplying body is cut halfway, the weft thread can be pulled from the yarn supplying body to the length measuring and storing means and the supplying operation of the yarn supplying body can be automatically performed. Further, even if a yarn breakage occurs, the weft yarn end is guided again for the yarn supplying body in use, and the weft yarn can be continuously supplied as it is.

In particular, even when the yarn feeder is empty, the yarn feeder is automatically switched based on the yarn signal from the yarn sensor. Therefore, it is possible to obtain a stable operation rate of the loom without adversely affecting the woven fabric as described above.

[Brief description of drawings]

FIG. 1 is a side view of the yarn feeding guide device according to the first embodiment, FIG. 2 is a plan view of the device according to the second embodiment, FIG. 3 is a side view of the second embodiment, and FIG. 3 is a plan view of the same device in FIG. 3, FIG. 5 is a side view of the third embodiment, and FIG. 6 is a side view of the same device in the fourth embodiment. 1 ... Thread feeding guide device, 2 ... Weft thread, 3 ... Thread feeder, 4
...... Suction guides, 5a, 5b ...... Yarn guide tubes, 6 ...... Length measuring storage means, 7 ...... Winding bodies, 10 ...... Indexing feed means, 14 ......
Thread sensor, 15 …… Remaining thread sensor, 16a, 16 …… Suction nozzle, 19 …… Controller, 20 …… Loom control device, 21 …… Switching operator, 26 …… Feed motor, 27 …… Thread guide Element,
35 …… Motor, 40 …… Suction slit, 41 …… Positioning sensor, 47 …… Motor, 50 …… Air cylinder.

Claims (1)

(57) [Claims] 1. A feed means for guiding a plurality of weft yarn feeders one by one to a yarn feeding position, and a yarn feeding state at a yarn feeding position for cutting a weft yarn in the middle of the weft yarn or for emptying the yarn feeder. A yarn sensor for detecting, a guide body provided with an opening so that the opening approaches the outer peripheral surface of the yarn supplying body at the yarn supplying position, and an inward direction from the opening of the guide body. Control the operation of the feeding means, the guide body and the nozzle based on the signal from the yarn sensor that guides the weft thread drawn into the guide body to a predetermined position, and the noise that generates the air flow in the direction A yarn feeding guide device in a shuttleless loom, comprising: