JPS63135546A - Inferior yarn removing device of shuttleless loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention provides a method for automatically starting a loom after removing the defective yarn from the weaving front when the weft insertion is defective. This invention relates to a removal device that can be removed from the end.

Prior Art For example, the invention of Japanese Patent Application Laid-Open No. 59-21757 discloses that when a weft thread is defective, after the weft thread is separated from the front of the woven fabric,
This shows that the defective yarn is pulled out from the shed by the suction action of the suction nozzle and the winding action of the waist roller. However, in that invention, a step of separating the defective yarn from the front of the woven fabric is essential before taking off the defective yarn, and for this purpose, a separating means of a special structure is required.

Therefore, the patent applicant proposed an "incomplete weft thread removal device" (patent application filed in 1983) for the purpose of easily pulling out the defective threads from the front of the weaving without using the special separating means as in the above-mentioned prior art. -089720) has already been proposed. The removal device uses a guide nozzle near the weft insertion nozzle to displace the weft yarn connected to the defective yarn to a position away from the flight path when a weft insertion failure occurs, that is, when a weft stop signal is issued. After avoiding the cutter on the yarn feeding side and guiding the weft yarn to the winding device, the weft yarn is cut at the tip side of the weft insertion nozzle, and then the defective yarn is wound up with the winding device. The thread is pulled out by hand from the front of the weave toward the opening.

By the way, when the weft yarn breaks midway during weft insertion and so-called blown-off or body breakage occurs, even if one defective yarn is pulled out from the weft insertion nozzle side, the other defective yarn that broke on the opposite yarn feeding side The defective yarns cannot be completely removed from the weave as they remain.

OBJECTS OF THE INVENTION Accordingly, an object of the present invention is to enable complete removal of defective yarns even when breakage or body breakage occurs.

SUMMARY OF THE INVENTION Therefore, the present invention provides a shuttleless loom that is equipped with a defective yarn removal device on the weft insertion side and a weft tensioning device on the non-weft insertion side, when a weft insertion defect occurs. The removing device removes defective yarns from the woven fabric, and the ends of the weft yarns due to body breakage and blow-outs are pulled out from the woven fabric by the fluid flow from the blowing nozzle of the tensioning device and discharged to a predetermined position. and,
The above-mentioned removing device and tensioning device are activated in response to a state of poor weft insertion, and each performs predetermined operations one after another under predetermined sequence control by a controller.

Structure of the Invention FIGS. 1 to 3 show the mechanical structure of a defective yarn removing device 1 for a loom according to the present invention. This defective yarn removing device 1
The main parts include a guide nozzle 2, a cutter 3, and a removing device 4 on the weft insertion side, and a tensioning device 60 on the opposite side.

The guide nozzle 2 is located between the weft insertion nozzle 5 and the weft insertion side end of the woven fabric 6 on the yarn feeding side, and is directed in a direction away from the flying path, for example, diagonally upward. Further, the cutter 3 is provided, for example, at the tip of the weft insertion nozzle 5, near the cylindrical yarn guide 7. Note that the cutter 3 and the yarn guide 7 are fixedly attached by suitable supporting means.

The removing device 4 rotatably supports a winding body 9 and a rotating body 10 as winding means inside a cylindrical housing 8. The winding body 9 is a rod 17,
It is rotatably and slidably supported in the axial direction by a stroke bearing 18 in the housing 8, and a blow nozzle 12 is integrally formed at the center position of its tip, and a conical winding is formed at its outer circumference. A chamfered surface 13 is formed. Note that the blow nozzle 12 has a communication hole 14.
A communication groove 15 on the outer periphery leads to a fluid intake fitting 16 attached to the housing 8 and the sliding bearing 11. Further, this winding body 9 has a rod 17 integrally formed at the center position of the rear end portion. This rod 17 is slidably supported in the axial direction by a stroke hair ring 18 in the housing 8, and its tip corresponds to a pressing body 22 fixed to a piston rod 21 of a pressing cylinder 20. ing. This rod 17 is always urged rightward by a coil spring 24 provided between a sleeve 19 which also serves as a spring receiver and a spring receiver 23 at the tip of the rod 17.

The amount of rightward movement of the roll 9 is regulated by the roll 9 and the corresponding cap 25. The amount of leftward movement is determined by the contact between the rotating body 10 and the winding body 9. The sleeve 19 is attached to the ball bearing 2 inside the cap 25 attached to the tip of the housing 8.
It is rotatably supported by 6.

In addition, a fitting portion 28 formed by a conical recess is integrally formed at a portion of the rotating body 10 that corresponds to the conical winding surface 13, and a hollow rotating shaft 29 in the extension portion of the fitting portion 28 connects the housing. 8 and is rotatably supported by a ball bearing 30. Note that this ball bearing 30 is prevented from being removed by a cover 31 attached to the opening surface of the housing 8. The inside of this rotary shaft 29 is a discharge path 32, and its tip portion faces the inside of the trash can 33. Further, this rotating body 10 is driven by a drive motor 3 by means of a gear 34a attached thereto.
It meshes with gear 34b of No. 5, receives rotational force from its drive motor 35, and is driven at a predetermined speed.

In this way, the above-mentioned winding body 9 and rotating body 10
are opposed to each other inside the housing 8 while forming an appropriate space. In this space, the housing 8 is combined with the guide tube 36 in a crossed manner. This guide tube 36 is open at the top and bottom, and communicates with the space where the winding body 9 and the rotating body 10 face each other through a guide hole 37 located substantially below the middle portion. Note that a baffle plate 38 is attached to the upper opening surface of the guide tube 36, if necessary. A sensor 40 is attached near the guide hole 37. This sensor 40 includes, for example, one light emitter and a light receiver.

Next, FIG. 4 shows the configuration of the tensioning device 60. This tensioning device 60 causes a fluid to flow at the tip of the weft yarn 56 on the non-weft insertion side during a normal weft insertion movement.
For example, the weft yarn 56 is restrained by an air flow and is used to tension the weft yarn 56 over the weaving width until just before the weaving,
On one side of the reed 61 it is provided with a blowing nozzle 62 and, facing this, on the other side with a capture vibro 3. The reed 61 is fixed along the reed frame 64, and the blowing nozzle 62 is attached to the reed frame 64 at an appropriate angle of inclination, and the reed 61 has an injection port at its tip. It faces the part of the thread guide 61a formed by the recess. On the other hand, the capture vibro 3 is mounted on the back side of the reed 6I by an L-shaped bracket 65 and a positioning body 66.
It is attached perpendicularly to the reed 61, with one opening facing the injection port of the nozzle 62 for blowing from the gap in the reed 61, and the other end bent downward, for example, to form a thread receiver. Facing the inside of 67. The bracket 65 is fixed to, for example, a reed holder 68 of the reed 61 with a metal fitting 69.

Next, FIG. 5 shows the piping system of the blow nozzle 62. The pressure fluid source 70 branches through a tank 71, and merges through a pressure regulating valve 72 and an on-off valve 73 for weft insertion, and an electric pressure regulating valve 74 and an electromagnetic on-off valve 75 for removing defective yarn. and the blowing nozzle 6
Connected to 2.

Furthermore, FIG. 6 shows a detection circuit 76 for detecting the horizontal insertion state. This detection circuit 76 is equipped with two feelers 7 and 78 for checking the horizontal insertion state and its defective state.

As shown in FIG. 1, one feel rough 7 is provided at the position where the weft yarn 56 reaches on the side opposite to the weft insertion side.
Further, as shown in FIG. 4, another feeler 8 is provided at an appropriate position of the capture vibro 3 so as to face inside thereof. These feeling roughs 7 and 78 are each connected to the input end of an AND gate 79, and the output end of the AND gate 79 and the output end of the feeling rough 8 are respectively connected to the input end of an OR gate 80. This OR gate 80 is connected to the set input end of one flip-flop 81, and the feeler 8 is directly connected to the 20 cent input end of the other flip-flop 81. These flip-flops 81 and 82 are both connected to a first controller 83 and a second controller 84 at their output ends, respectively, and are reset by a reset signal X. Note that this reset signal X is generated when both the sensor 40 and the feeler 8 detect a state in which there is no thread.

The first controller 83 controls the guide nozzle 2 and the canter 3.
, the blow nozzle 12, the pressure cylinder 20, and the drive motor 35, and sequentially operate them under predetermined sequence control.

Further, in order to control the pressure regulating valve 74 and the on-off valve 75, the second controller 84 performs necessary sequence control using the reversal signal Y from the loom control device as an input condition.

Next, FIG. 7 shows the horizontal insertion state in relation to the feel rough 7.78. ■ in the same figure indicates correct width insertion, and ■■■ in the same figure indicates poor width insertion, respectively.
It corresponds to short picks and pend picks.

In addition, the table below shows the output signal level of Feelaf 7.78 in relation to the horizontal loading state, and also shows the operation of the removing device 4 and the tensioning device 60 corresponding to each state. or indicates an inoperable condition.

Operation of the Invention During normal weft insertion, the weft insertion nozzle 5 pulls out the stored weft yarn 56 from a length measuring storage device (not shown) and sequentially inserts the weft yarn into the opening of the warp yarn 57 at the weft insertion timing. The tip of the flying weft yarn 56 passes through the opening of the entangled yarn 55 and reaches the tensioning device 60. At this time, the blowing nozzle 62 opens the weft insertion pressure regulating valve 72 and the opening/closing valve 73 between before the weft 56 arrives and during the opening timing, for example, between 200 degrees and 300 degrees of the crank angle of the loom.
This injects fluid at a predetermined pressure, such as air. As a result, the tip of the weft yarn 56 in the wefted state is bent by the flow of the fluid and guided into the trapping vibro 3 through the gap of the reed 61. In this way, the weft yarn 56 after weaving is tensioned with an appropriate tension across the width of the weave.

After this, the warp threads 57 and the entangled threads 55 are in a closed state, so the weft threads 56 intersect with the warp threads 57 while remaining in a tensioned state. Thereafter, the weft thread 56 is cut by a cutter 5 at both ends of the weave.
8.59.

Further, the entangled thread 55 entangles the cut end of the weft thread 56 and guides it to a predetermined position. In such normal horizontal insertion, as shown in normal horizontal insertion ■ in the table above, the feel rough 7 generates an "H" level output and the feel rough 8 generates an "L" level output, so the ζ flip-flop 81 .8
2 is not set.

However, when a horizontal insertion defect occurs, the detection circuit 76
Depending on the condition of the horizontal insertion failure, the flip-flop 8
1 is always set, and the flip-flop 82 is set as necessary.

That is, in the state of defective horizontal insertion, both the flip-flops 81 and 82 are set, so the detection circuit 76 generates a horizontal stop signal M of "H" level in one flip-flop 81, and A flip-flop 82 generates an "H" level command signal N and sends it to a first controller 83 and a second controller 84, respectively. At this time, the loom receives the weft stop signal M, applies the brake, and automatically stops in the next cycle following the cycle in which the weft insertion is defective. After that, the first controller 83
The removing device 4 and the like are activated in a predetermined sequence of operations, and the second controller 84 also activates the tensioning device 60 for removing defective yarns. On the other hand, in state (3) of poor horizontal insertion, the feeler 8 generates an output at the L" level, so the flip-flop 82 does not enter the set state, and therefore the second controller 84 does not operate. , FIG. 8 shows the sequence of operations of the removing device 4 and the tensioning device 60.

First, the operation of the removal device 4 will be explained. As already mentioned, the removal device 4 on the weft insertion side is always activated if the weft insertion is defective. At the stage when a weft insertion failure occurs, the weft thread length measuring and storage device (not shown) unwraps the weft thread 56 with a locking pin upon receiving the weft stop signal M, and weft thread 56 of an appropriate length. can be supplied to the horizontal nozzle 5. The length of this weft thread 56 is at least
From the horizontal insertion nozzle 5 to the guide hole 37 of the nozzle side removal device 4
In the case of a drum-type weft yarn measuring and storage device, this length is obtained by unwinding, for example, one turn of the weft yarn 56 on the drum using a locking bin, or by unwinding one turn of the weft yarn 56 on the drum using a length measuring roller. - If it is an air storage type weft yarn length measuring and storage device, regulation can be performed by operating the clamper in the opening direction for a predetermined period of time on the upstream side of the weft insertion nozzle 5 to temporarily release the holding of the weft yarn 56.

Now, when the weft stop signal M is given, the guide nozzle 2 is placed under the control of the first controller 83 and injects air from its tip to insert the weft yarn 56 into the weft nozzle 5 and the woven fabric. 6, and the weft 56 is moved toward the inside of the cylindrical yarn guide 7 of the removing device 4 in order to avoid cutting the end of the woven fabric 6 by the cutter 58.

At the same time, the winding body 10 takes in compressed air from the outside and injects the air from the blow nozzle 12 toward the exhaust path 32 of the rotary body 10 to generate negative pressure air near the exhaust path 32. As a result, the weft yarn 56 enters the inside of the guide tube 36 and then enters the inside of the discharge path 32 through the guide hole 37. During this time, the cutter 58 is performing a cutting operation, but the weft thread 56 is not cut because the weft thread 56 is displaced from the position of the cutter 58. As a result, weft 5
6 remains connected between the weft insertion nozzle 5 and the woven fabric 6.

During this time, the loom comes to a complete stop in the next cycle, and then automatically reverses to open the front 6a of the defective yarn 56a. At this point, the guide nozzle 2 stops jetting air, but the winding body 9 continues jetting compressed air from its blow nozzle 12 for a while.

While air is being injected from the blow nozzle 12, the pressure cylinder 20 operates next, and its piston rod 21
By moving forward, the rod 17 is moved to the left by the pressing body 22 against the coil spring 24 in FIGS. 1 and 2. Therefore, the conical winding surface 13 of the winding body 9 comes into pressure contact with the conical fitting portion 28 of the rotating body 10, and holds the weft thread 56 in a sandwiched state therebetween. At the same time, the cutter 3 operates to cut the weft yarn 56 between the weft insertion nozzle 5 and the yarn guide 7 near the weft insertion nozzle 5.

Thereafter, the drive motor 35 automatically starts upon receiving the start command, and gives rotational motion to the rotating body 10 .

At this time, the winding body 9 is rotated at the same speed as the rotating body 10 due to the frictional rotational force due to the engagement between the tip of the winding surface 13 and the fitting part 28, and the weft 56 is rotated at the same speed as the rotating body 10.
is sequentially wound around its outer circumference. By this winding,
The defective yarn 56a is pulled out from the front 6a of the woven fabric 6. In this pulling process, the pulling direction of the defective yarn 56a is closer to the opening of the warp yarn 57 than the extension line of the front 6a,
Moreover, since the direction is set so as not to rub against the warp yarns 57, the defective yarn 56a is pulled out with little resistance while being pulled away from the woven fabric 6a toward the opening side. The direction in which such defective yarn 56a is taken is determined by the yarn guide 7.
or, when this yarn guide 7 is not installed, by setting the installation position of the removal device 4, that is, the installation position of the guide tube 36 that regulates the pulling direction, closer to the opening than the extension line of the front 6a. It becomes possible.

In this way, the pair of winding bodies 9 and the rotating body 10 wind up the defective yarn 56a into a coil around the outer periphery of the winding surface 13. After a certain period of time has elapsed during this winding operation, the drive motor 35 automatically stops. Also, prior to this, the pressing cylinder 20 retreats its piston rod 21, so that the coiled body 9
, the conical winding surface 13 is moved away from the fitting portion 28 . At the same time, the blow nozzle 12 injects air again to blow away the defective yarn 56a wound around the winding surface 13 toward the fitting part 28, and the inside of the hollow rotating shaft 29, that is, the discharge path 32.
After that, it is discharged into the interior of the trassoche box 33. When the work of removing the defective yarn 56a is completed, the loom automatically reverses itself by a necessary angle, and then receives an automatic operation command and starts normal weaving operation.

Next, the operation of the tensioning device 60 in the case of poor horizontal insertion will be explained.

When the detection circuit 76 generates the command signal N, the second controller 84 opens the on-off valve 75 and also opens the pressure regulating valve 7.
4 is set to a pressure that can restrain the end of the weft thread 56 without breaking the thread.

For this reason, the blowing nozzle 62 injects the fluid at that pressure and restrains the weft thread 56 within the capture vibro 3. In this way, until the loom is stopped and the reversal is completed, the end of the weft thread 56 remains inside the catching vibro 3.
He will continue to be detained. In this way, even during reversal,
Since the blowing nozzle 62 continuously generates a jet stream, when the reed 61 retreats, the defective yarn 56b is forcibly separated from the front of the fabric by the air stream. After the reversal of the loom has been completed and the weaving of the weaving front with defective weft insertion has been completed, the second controller 84 confirms the stopped state using, for example, the reversal signal Y, and performs the following steps in order to remove the defective yarns 56a and 56b. The pressure of the pressure regulating valve 74 is reset to a higher level. For this reason, the blowing nozzle 62 continues to eject fluid with a stronger ejection force than the previous time, and the defective yarn 56b is carried on this fluid flow, separated from the fabric, and discharged into the trapping vibro 3. The set pressure of the pressure regulating valve 74 at this time is determined depending on the type of yarn. Also, at this time, the on-off valve 75
is in an open state continuously, but it may be made to repeat opening and closing intermittently at a predetermined period, as shown by the dotted line in FIG. In this case, since the jet stream is generated intermittently, the defective yarn 56b can be easily pulled out from the woven blank 6a. As a result, the Feel Ruff 8 detects the state where there is no thread and changes its output from the "H" level to the L" level, so the second controller 84 loses the "H" level command signal N and repeats a series of The operation ends. At this point, the on-off valve 75 is set to the closed state by the second controller 84. Then, when both the sensor 40 and the feel luff 8 detect a state where there is no thread, the loom is , is set to a restartable state.Instead of providing the pressure regulating valve 74 and the opening/closing valve 75 for removing the defective yarn 56b,
Defective thread 56 in pressure regulating valve 72 and opening/closing valve 73 for weft insertion
The removal function of b may also be used.

Modifications of the Invention In the above embodiment, in the case of long pick, the removing device 4 and the tensioning device 60 operate together, so that the defective yarn 56.
+ will receive a traction force from the weft insertion side and the non-weft insertion side, but since the traction force of the removal device 4 is stronger, the defective yarn 56a will be pulled in the direction of the weft insertion side despite the operation of the tensioning device 60. It is removed while being pulled by the removing device 4. Note that if an unwinding sensor is provided on the length measuring storage device side, the state of cut-off and long-big state can be determined from the number of unwindings, so the tensioning device 60 is not operated in the case of long pink. Good too. Further, the tensioning device 60 may be activated in all cases of poor horizontal insertion.

Effects of the Invention In the present invention, a defective yarn removal device is provided on the weft insertion side, and a weft yarn tensioning device is installed on the opposite weft insertion side. Even when the weft yarn is broken, by operating the blow nozzle of the tensioning device together with the weft yarn removal device, the defective yarn that has been separated from the weft yarn can be removed from the side opposite to the weft insertion side. Therefore, in the event of breakage or body breakage, there is no need to pull out the defective yarn from the opposite weft-feeding side, resulting in a malfunction in which the loom starts up while the defective yarn is still incompletely removed. can be definitely prevented. This makes it possible to remove defective yarns unmanned, and even in that case, a complete removal operation can be expected.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a defective yarn removing device for a shuttleless loom according to the present invention, Fig. 2 is a vertical sectional view of the same device, and Fig. 3 is a
4 is an enlarged sectional view of the weft tensioning device, 5 is a piping diagram of the jetting fluid, 6 is a block diagram of the detection circuit, and 7 is a weft insertion failure. FIG. 8 is a time chart of the operation order. ■... Defective thread removal device, 2... Guide nozzle, 3... Cutter, 4... Removal device, 5... Weft insertion nozzle, 6...
Woven fabric, 40...sensor, 56...weft, 56a, 5
6b: Defective thread, 57: Warp thread, 60: Tension device,
62... Blow nozzle, 63... Capture pipe, 64...
- Receptacle frame, 70... Pressure fluid source, 74... Pressure regulating valve,
75...Opening/closing valve, 76...Detection circuit, 77.78...Tweeter, 83...First controller, 84...Second controller.

Claims (1)

[Claims] In a shuttleless loom, the machine is equipped with a tensioning device that blows the weft yarn on the non-weft insertion side during weft insertion and tensions it by placing it on a fluid flow from a nozzle, and a removal device that pulls out the defective yarn from the weaving front on the weft insertion side when there is a defect in weft insertion, A pressure regulating valve and an on-off valve interposed between the pressure fluid source and the above-mentioned blowing nozzle, a detection circuit that detects the weft insertion state and issues a weft stop signal and a command signal when the weft insertion is defective, and an output signal from this detection circuit. a first controller that operates the removing device using a weft stop signal as an input condition; and a first controller that opens the opening/closing valve when receiving a command signal from the detection circuit and adjusts the pressure of the pressure regulating valve at each operation period. 1. A defective yarn removing device for a shuttleless loom, comprising: a second controller for adjustment.