JPH02251641A - Device for treating weft yarn of jet loom - Google Patents

Abstract

PURPOSE:To feed a fluid under the optimum pressure to a main nozzle in treating a mispick yarn by connecting a circuit for misblowing under a low pressure to the main nozzle separately from a circuit for a picking fluid and opening the circuit after making a mispick or stop signal. CONSTITUTION:A main nozzle 49 is connected through a connecting circuit 93 to a compressed air source 91 and a blowing nozzle 74 is connected through a blowing nozzle circuit 75 to the compressed air source 91. A changeover valve 76 and a pressure control valve 77 are provided in the blowing nozzle circuit 75. The mispick blowing circuit 96 is provided with a misblowing valve 97 and a pressure control valve 98 regulated to a low pressure. The misblowing valve 97 is opened after making a mispick or stop signal to jet a fluid from the main nozzle 49 and discharge a weft yarn 44 released from a length measuring device 45. Thereby, a mispick yarn is introduced into a suction nozzle 61 with the blowing nozzle 74.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a weft processing device for a shuttleless loom, more particularly for an air jet loom or a water jet loom.

[Conventional technology]

The weft insertion device of the jet loom is connected to a main nozzle that inserts the weft yarn into a shed formed between the upper and lower warp yarns of the jet loom using pressurized fluid, and a connection that is connected to the main nozzle and supplies pressurized fluid jetted from the main nozzle. It consists of a circuit and a suction nozzle installed so that its tip can be located near the weft path between the main nozzle and the main nozzle side selvage threads, and is used to prevent weft thread breaks, warp thread breaks, or selvage threads that occur during jet loom operation. When the jet loom is stopped due to an error signal such as breakage, an error signal, or a manual stop signal, there is a method in which the weft of the weft length measuring device is sucked into a suction nozzle.

In the second case, due to the shape and position of the yarn guide installed between the main nozzle and the weft length measuring device, the pull-out resistance of the weft increases, and the weft for one pick of the weft length measuring device is smoothly fed from the main nozzle. Since the threads are not removed, it may not be possible to reliably process the misplaced threads.

In addition, a breeze is sent from the main nozzle to regulate the weft yarns at the tip of the main nozzle, but mistakes can occur when the breeze pressure is kept low to deal with weak yarns, thin yarns, etc. The yarn may not be reliably fed out of the main nozzle.

JP-A No. 59-15541 discloses that a bypass circuit with a built-in throttle valve is connected to a connecting circuit, and when a loom stop signal such as a weft insertion failure occurs, the opening/closing valve of the connecting circuit opens (see Fig. 2). embodiment), or closed (embodiment shown in Figure 3), the bypass circuit reduces the fluid energy injected from the main nozzle when the suction nozzle is activated, supplies a small amount of compressed air, and supplies a small amount of compressed air to the weft yarn to the suction nozzle. A jet loom weft handling device is disclosed which ensures the introduction of a jet loom.

[Problem to be solved by the invention]

In the jet loom weft processing device disclosed in JP-A-59-15541, the source pressure supplied to the main nozzle is the same both when the bypass circuit is activated and when it is not activated. It is difficult to adjust the pressure to supply fluid at the optimum pressure depending on the yarn type, and fine or weak yarns are easily damaged. Furthermore, if the throttle valve is too narrowed in order to prevent damage to thin threads or weak threads, large-scale ejection cannot be performed smoothly.

Furthermore, in the embodiment disclosed in FIG. 2 of Japanese Patent Application Laid-Open No. 59-15541, surplus fluid is discharged through a bypass circuit incorporating a throttle valve, which causes a problem of large fluid loss. Further, depending on the throttle state of the throttle valve, the desired fluid discharge effect may not be achieved.

Furthermore, in the embodiment disclosed in FIG. 3 of JP-A-59-15541, another solenoid valve is provided in series with the connection circuit containing the solenoid valve, and the latter solenoid valve allows the fluid to flow through the built-in throttle valve. When the fluid is ejected from the main nozzle, it is necessary to operate both electromagnetic valves. For this reason, there is also the problem that the rise performance during injection of the weft inserting fluid is affected.

In view of the above-mentioned problems, the present invention is capable of supplying fluid at an optimal pressure to the main nozzle when processing misplaced weft yarns, with little fluid loss, and without impairing the rising performance when jetting the weft inserting fluid. To provide a jet loom weft processing device capable of surely processing misplaced weft threads regardless of the shape and position of the yarn guide and when controlling the breeze pressure to be low.

[Means to accomplish the task]

In the present invention, the above-mentioned objects include a weft length measuring device for measuring the length of the weft for weft insertion, a main nozzle for inserting the weft by pressure fluid into a shed formed between the upper and lower warps, and a weft length measuring device connected to the main nozzle. , a weft insertion fluid circuit for supplying pressure fluid injected from the main nozzle, a suction nozzle installed so that its tip can be located near the weft path between the main nozzle and the main nozzle side selvage yarn; In a jet loom weft processing device comprising a misblow nozzle that guides a misblow weft to a suction nozzle, a low-pressure misblow circuit is connected to the main nozzle in addition to the weft insertion fluid circuit, and the misblow circuit is connected to the jet loom. After a mistake signal or a stop signal is issued during operation of the room, the circuit is opened, fluid is injected from the main nozzle, the weft released from the length measuring device is discharged, and the weft mistake is sent to the suction nozzle by the mistake blow nozzle. This is achieved by a jet loom weft processing device characterized by introducing yarn.

[Function] In the present invention, a low-pressure misblow circuit is connected to the main nozzle separately from the weft insertion fluid circuit,
The mis-blow circuit opens after a mis-blow signal or a stop signal is issued during operation of the jet loom, injects fluid from the main nozzle, discharges the weft released from the length measuring device, and uses the mis-blow nozzle to Since the mis-weft yarn is introduced into the suction nozzle, fluid at an optimal pressure can be supplied to the main nozzle from the low-pressure mis-blow circuit when processing the mis-weft yarn. Moreover, since all the fluid that has passed through the mis-blow circuit is injected from the main nozzle, there is little fluid loss. Moreover, since the fluid only passes through one electromagnetic valve when it is ejected from the main nozzle, the rising performance when ejecting the weft inserting fluid is not impaired. Therefore, according to the present invention, it is possible to reliably process misplaced weft yarns.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 2 is a side view showing an outline of the drive system of the air jet room according to the present invention, in which power is transmitted from the drive motor 11 to the crankshaft 15 via a transmission member such as the V-belt 13, similar to the conventional device. communicated.

The crankshaft 15 drives the yarn beam 19 via the transmission 17 to unwind the warp yarns 21, and also frictionally drives the winding roller 32 with the surface roller 31 to unwind the woven fabric 3.
I am winding up 3. The gear ratio of the transmission 17 is adjusted according to the displacement of the tension roller 23, and the back roller 2
2, the tension of the warp yarns unreeled is set to a predetermined value.

The crankshaft 15 moves the heald frame 24 up and down, causing the warp threads 21 to perform a required shedding motion. Further, the locking shaft 29 supports a sled 27 via a sled sword 28, and a reed 25 and a weft insertion guide 26 are attached to the sled 27. The crankshaft 15 moves the reed 25 and the weft insertion guide 26 between the solid line position and the broken line position via the locking shaft 29. As a result, the reed 25 beats the inserted weft yarn. The above configuration is the same as a conventional air jet room.

Next, the weft insertion mechanism will be explained with reference to FIG.

The weft yarn 44 is unwound from the cheese 41 through the tensor 42 and stored in a drum-type weft length measurement storage device 45. In addition,
46 is a locking pin operated by an electromagnetic solenoid 47.

Note that instead of the drum-type weft length measuring and storing device described above, a length measuring and storing mechanism that combines a feed roller and a pool pipe may be used.

The drum-type weft length measuring and storage device measures the length of the weft 44 and supplies the weft 44 to the main nozzle 49 in synchronization with the rotation of the crankshaft 15 (FIG. 2).

Reference numeral 73 indicates a drum-type weft length measuring and storage device and the main nozzle 4.
This is a guide provided between 9 and 9.

The main nozzle 49 is connected to the crankshaft 15 (Fig. 2).
Compressed air is injected in synchronization with the rotation of the weft yarns 44 to insert the weft yarns 44 into the shed formed between the upper and lower warp yarns 21. Then, the reeded weft yarn 44 is beaten with a reed 25.

Furthermore, in the embodiment of the present invention, an appropriate type of detection such as a photoelectric type, mechanical type, or fluid type is used to detect whether or not the weft yarn 44 is reliably inserted near the selvage yarn on the opposite side of the main nozzle 49. 51 and 52 are provided to detect that the weft yarn 44 is reliably fed through the main nozzle 49.

A known ejector type suction nozzle 61 is provided between the main nozzle 49 and the selvage thread, which generates a suction force by the action of compressed air.

A blow nozzle 74 is provided opposite to the suction nozzle 61 for blowing the mis-weft yarn into the suction nozzle 61.

The blow nozzle 74 communicates with the air tank 91 via a blow nozzle circuit 75. Inside the blow nozzle circuit 75, there is a switching valve 76 that controls the injection of compressed air from the blow nozzle 74, and a pressure regulating valve 7 that adjusts the pressure of the injection fluid.
7 is provided.

The main nozzle 49 is connected to a compressed air source (air tank) 91 via a connection circuit 93.

The connecting circuit 93 is provided with a normally closed two-bottom, two-position switching valve as a main valve 92 for controlling the injection of compressed air for weft insertion from the main nozzle 49.

In order to prevent the tip of the weft yarn 44 from returning into the four main nozzles, a breeze regulator 94 for blowing a breeze from the main nozzle 49 is provided in parallel with the 2-port 2-position switching valve 92, and the pressure regulating valve 95 is The air tank 91 is connected to the air tank 91 through the air tank 91.

Furthermore, a breeze regulator 94.2-bottom 2-position switching valve 9
A mis-blow circuit 96 is connected in parallel with 2 and communicated with the air tank 91. The mis-blow circuit 96 is provided with a mis-blow valve 97 consisting of a normally closed two-bottom, two-position switching valve and a pressure regulating valve 98 adjusted to a low pressure.

Next, the operation of the embodiment of the present invention will be explained with reference to FIG. 1 and FIGS. 3(a) and 3(b).

The heald frame 24 is moved to open, and the weft yarn 44 is inserted into the shed formed between the upper and lower warp yarns 21. That is, cheese 4
The weft yarn 44 unwound from the weft yarn 1 through the tensor 42 is measured in length by a weft length measuring drum 45 and stored in accordance with the rotation of the crankshaft 15 (FIG. 2).

The electromagnetic bin 46 is operated in accordance with the timing of compressed air injection from the main nozzle 49, and the weft yarn 44 stored in the length measuring drum 45 is inserted into the shed formed between the upper and lower warp yarns 21.

Detectors 51 and 52 installed near the selvage threads on the opposite side of the main nozzle 49 check the weft insertion state when the warp threads 21 are almost closed (crank angle 250 to 300 degrees), and check if the weft is in the shed due to some reason. The inserted weft is the main nozzle 4
If a weft insertion error occurs in which the weft threads do not reach the selvage yarn on the opposite side of 9, the detectors 51 and 52 issue a weft insertion error signal. The motor 11 (second
(Fig.) is stopped and enters inertial operation.

When a mistake signal or a stop signal is sent, the operation of the main valve 92 is stopped, the compressed fluid for weft insertion sprayed from the four main nozzles is stopped, and the normal weft threads placed on the sides of the woven fabric are stopped. This prevents the cutting device (not shown) from cutting the weft yarn that has been inserted incorrectly. On the other hand, the weft locking electromagnetic pin 46 of the drum-type length measuring storage device 45 is released, and the mis-blow valve 97 of the mis-blow circuit 96 is activated (opened), and the pressure is adjusted to low pressure by the pressure regulating valve 98. A low pressure fluid for misblowing is injected from the main nozzle 49 to discharge the weft yarn 44 released from the length measuring device 45 during inertial operation of the loom.

As mentioned above, the blow nozzle 74 is connected to the blow nozzle circuit 7.
The blow nozzle circuit 75 is provided with a switching valve 76 for controlling the injection of compressed air from the blow nozzle 74 and a pressure regulating valve 77 for adjusting the pressure of the injection fluid. There is. The blow nozzle 7 is activated in time with the transmission of the miss signal or stop signal.
Compressed air is injected from 4 to deflect the weft discharged from the main nozzle toward the suction nozzle 61, and the weft is introduced into the suction nozzle 61 and sucked.

As shown in FIG. 3(a), the time during which the mis-blow valve 97 of the mis-blow circuit 96 is open is the 1-buck discharge time T (for the electromagnetic bin 46 of the measuring drum 45) for disposing of mis-threads. It may be approximately the time during which the compressed air is released, or it may be approximately the time during which the compressed air is ejected from the blow nozzle 74 as shown in FIG. 3(b).

After the machine, which was operating inertia, moved for about one cycle, the warp thread 2
1 stops when it is almost closed (crank angle approximately 300 degrees).

Next, the drive motor 11 (FIG. 1) is directly operated in reverse to reverse the machine frame by about 480 degrees, thereby bringing the warp threads 21 into an open state (crank angle of about 180 degrees).

In this open state, the mis-inserted weft yarn 44 is connected to the weft suctioned by the suction nozzle 61, so it is sequentially pulled out from within the warp opening by a take-up roller (not shown) provided in the suction nozzle 61.
It is automatically removed into the suction nozzle 61. At this time, the weft threads connected to the four main nozzle sides that are being sucked by the suction nozzle 61 are cut by a cutter (not shown) provided at the end of the suction nozzle 61 or between the suction nozzle 61 and the main nozzle 49. disconnected by. Next, the drive motor 11 is operated to reverse the machine to a state where the warp threads 21 are open (crank angle of about 270 degrees), which is suitable for starting the air jet loom.

In this state, preparations necessary for startup are automatically made, and operation of the air jet room is automatically restarted.

As described above, according to the present invention, after detecting a weft insertion error, the weft can be reliably sucked into the suction nozzle. Therefore, after that, the machine can be reversed to a state where it is possible to take out the weft thread that has been erroneously inserted, and the work to remove only the weft thread that has been erroneously inserted can be done easily and quickly, and the machine can be restarted after stopping for a very short time. The productivity of the air jet loom will hardly decrease due to weft insertion errors.

In the above explanation, an example of repairing a weft thread that has been inserted incorrectly has been explained, but the present invention can also repair weft threads stored in the weft length measuring device even when the air jet loom is stopped due to warp thread breakage, selvage thread breakage, or human operation. Applicable when it is necessary to discharge

In the above explanation, weft processing was performed at the same time as the miss signal or stop signal was issued, but it may also be carried out in accordance with the weft insertion timing after the miss signal or stop signal is generated, or it may be carried out after the loom has stopped. .

Further, the suction nozzle described in the above embodiment may be provided with a weft conduit facing the warp path.

〔Effect of the invention〕

In the present invention, a low-pressure misblow circuit is connected to the main nozzle separately from the weft insertion fluid circuit,
The mis-blow circuit opens after a mis-blow signal or a stop signal is issued during operation of the jet loom, injects fluid from the main nozzle, discharges the weft released from the length measuring device, and uses the mis-blow nozzle to Since the misplaced weft yarn is introduced into the suction nozzle, fluid at an optimal pressure can be supplied to the main nozzle from the low-pressure misblow circuit when processing the weft yarn that has been misplaced.

Moreover, since all the fluid that has passed through the mis-blow circuit is injected from the main nozzle, there is little fluid loss. Moreover, since the fluid only passes through one electromagnetic valve when it is ejected from the main nozzle, the rising performance when ejecting the weft inserting fluid is not impaired.

Therefore, according to the present invention, regardless of whether the breeze pressure of the main nozzle is controlled to be low or the shape and position of the nozzle guide,
Mistaken weft yarns can be processed reliably.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of an embodiment of the present invention, FIG. 2 is a side view schematically showing the drive system of an air jet room according to the present invention, and FIGS. 3(a) and (b) are It is a diagram showing operation. 44... Weft, 45... Length measuring drum, 49... Main nozzle, 51.52... Detector, 61... Suction nozzle, 92... Main valve, 93... Connection circuit , 94... Breeze regulator, 96... Mis-blow circuit, 97 Mis-blow valve. Figure 3 (Q) Figure 3 (b) Procedural amendment letter 5, drawing to be amended 6, content of the amendment Engraving of the drawing (no change in content) 1. Indication of the case 1999 Patent Application No. 070123 2. Name of the invention: Jet loom weft processing device 7. Attached document catalog drawings 3. Person making the amendment Address related to the case: 448

Claims (1)

[Claims] 1. A weft length measuring device that measures the length of the weft for weft insertion, a main nozzle that inserts the weft into a shed formed between the upper and lower warps using pressurized fluid, and a weft that is connected to the main nozzle and is injected from the main nozzle. a weft insertion fluid circuit for supplying pressurized fluid; a suction nozzle installed so that its tip can be located near the weft path between the main nozzle and the main nozzle side edge yarn; and a suction nozzle for guiding the missed weft to the suction nozzle. In a jet loom weft processing device comprising a mis-blow nozzle that handles errors occurring during operation of the jet loom, a low-pressure mis-blow circuit is connected to the main nozzle in addition to the weft insertion fluid circuit, and the mis-blow circuit is used to remove mistakes that occur during operation of the jet loom. After a signal or a stop signal is issued, the circuit is opened, fluid is injected from the main nozzle, the weft yarn released from the length measuring device is discharged, and the weft error yarn is introduced into the suction nozzle by the error blow nozzle. A jet loom weft processing device characterized by: