JPH07113183B2 - Weft processing device for shuttleless loom - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a weft processing device for a shuttleless loom such as an air jet loom, and more specifically, a weft insertion failure is automatically performed from a warp opening. The present invention relates to a weft processing device in which a weft is prevented from being cut by a cutter for easy removal.

(Prior Art) Since the shuttleless loom is faster than the shuttleless loom, and the productivity can be improved much higher, the adoption tendency thereof has been remarkable in recent years. However, since such a high-speed loom has a high weaving speed, when a weft insertion failure or the like occurs and the machine stand is stopped, there is a risk of damage due to excessive deceleration of each part.

Therefore, for weft processing, a method has been proposed in which the machine frame is completely stopped after about 1 cycle of inertial operation after detection of a weft insertion failure. This prevents the weft yarn from being cut by the cutter during the inertial operation, and stops it in a state where the weft yarn is connected between the main nozzle and the woven fabric. Is said to be easy to remove,
Next, after stopping the machine base, reverse the rotation to release the gripped state of the defective weft by the warp, cut the weft in the vicinity of the main nozzle, and pull the defective weft from one end of the cut weft to remove it. is there.

For example, as an apparatus for performing the weft processing, Japanese Patent Application Laid-Open No. 61-24
In Japanese Patent No. 5339, when a weft insertion failure occurs, as shown in FIGS. 6 (a) to 6 (c), the weft supply from the weft measuring device is stopped and the weft insertion main nozzle is stopped at the time of weft insertion before the machine stand is stopped.
Air injected from a guide nozzle 42 arranged near 41 displaces the weft Y to a position off the flight path to avoid cutting the defective weft Yb by the cutter 43. Furthermore, after guiding the weft yarn supplied from the weft length measuring device (not shown) to the winding device 44 at the normal operation timing, the weft yarn Y connected to the main nozzle 41 for weft insertion from the winding device 44 is fed to the main nozzle 41. An apparatus has been proposed in which the tip end of the weft is cut by another cutter 45, the weft is wound by a winding device 44, and the defective weft Yb is pulled out from the cloth fell.

(Problems to be solved by the invention) However, in the above-mentioned weft processing device, the guide nozzle 42 has a tension because the weft Y connected between the defective weft Yb and the main nozzle has a tension due to the fluid jet from the main nozzle. The weft Y does not come off the flight path sufficiently by the air injection by
There is a case in which it is impossible to avoid cutting the defective weft by the cutter 43, and there is a problem that the weft cannot be reliably processed.

So, instead of the weft processing device, a weft cutting cutter
An electromagnetic cutter is used as 43. When the weft insertion error occurs, the cutter operation is stopped and the next pick of weft is ejected without cutting the weft. After that, the electromagnetic cutter is activated to operate the main nozzle. It is also possible to cut the weft thread connected to 41. However, at the present time, a highly reliable electromagnetic cutter capable of operating at high speed for a long time has not been established, and when the electromagnetic cutter is used as the weft cutting cutter 43, a mistaken operation of the cutter occurs and the quality of the fabric is large. There may be defects.

In addition, in order to cut the weft Y connected to the main nozzle 41 from the winding device 44 at the tip of the main nozzle 41, a cutter 45 must be provided separately from the cutter 43 that cuts the weft that has been put in each time the weft is inserted. There is a problem that the structure must be complicated.

In view of the above-mentioned prior art, the present invention does not use an electromagnetic cutter as a weft cutting cutter, and reliably prevents the weft cutting by a simple mechanism and surely cuts the weft connected to the main nozzle by a cutter that operates every weft insertion. The purpose is to be able to.

(Means for Solving Problems) A weft measuring device equipped with a weft locking member that stores a predetermined amount of wefts and releases and locks the stored wefts during weft insertion, and a main nozzle for weft insertion. And a cutter disposed on the side of the woven fabric for cutting the weft yarn between the main nozzle and the woven fabric for each weft insertion, and a detection means for detecting a weft defect, and a weft is provided on the side of the cutter. When a defective insertion is detected, a blocking nozzle is arranged to prevent the weft from being cut by injecting a fluid to the opening side of the cutter, and the weft measuring device is installed based on the weft insertion detection signal before the cutter cuts the weft. The weft locking member is operated to release the stored weft, and a guide member extending from the cutter side to the reed side is arranged between the main nozzle and the warp row, and the guide member and the warp row are connected. The weft that is blown from the main nozzle between the upper side of the main nozzle A blowing nozzle that blows up to is disposed, and the weft yarn that is prevented from being cut by the blocking nozzle and blown above the main nozzle by the blowing nozzle is guided to the cutter side by the guide member when the sley is advanced, and the cutting is performed. It is what

(Operation) When the weft insertion failure is detected by the detection means, the weft locking member and the blocking nozzle are operated based on the detection signal. The weft locking member releases a certain amount of the weft stored in the weft length measuring device and then returns the weft to the locked state, and the released weft is pulled out in the weft inserting direction by fluid injection from the main nozzle or the blocking nozzle. On the other hand, the blocking nozzle blows air in a direction away from the cutting area of the cutter, that is, toward the opening side of the cutter, so that the weft is greatly curved by the length of the weft released by the weft locking member and is kept away from the cutter. Being
It is surely removed from the cutting area, and it is possible to prevent the weft cutting at the end of weft insertion. Wefts that have been blocked from cutting,
It is blown up above the main nozzle by the blow-up nozzle and is guided by the guide of the sley after that and is introduced into the opening of the cutter that is placed on the side of the woven fabric and operates for each weft insertion. It is surely cut by the action.

(Embodiment) An embodiment in which the present invention is embodied in an air jet loom is shown in FIGS. 1 to 5 and will be described based on this.

A main nozzle 2 for weft insertion is fixed to one end side of a sled 1 which is swingably arranged, and a reed 3 having a guide passage S for guiding the weft Y stands in front of the main nozzle 2. The weft Y, which is installed and jetted from the main nozzle 2, passes through the guide passage S and is weft-inserted.

A plurality of support blocks 12 are fixed to the front surface of the sley 1,
An auxiliary nozzle 12a is fixed to each support block in the vertical direction. The ejection port of the auxiliary nozzle 12a is directed toward the anti-main nozzle side into the weft guide passage S, and the weft Y inserted in the weft guide passage S is blown by the auxiliary ejection fluid from each auxiliary nozzle 12a. The run is supported.

On the front surface of the sley 1, a blow-up nozzle 11a is fixed by a support bracket 11 at a position between the warp row and the nozzle, and the jet nozzle at the tip of the blow-up nozzle 11a has an accelerating pipe 2a of the main nozzle 2.
In contrast, it is located in the lower front position.

Above the blow-up nozzle 11a, the inlet portion has the same blow-up nozzle 11a.
Pipe 6 having a weft guide port 6a facing the jet port of
Is fixed to the reed frame 3a, and a weft take-up device (not shown) having a take-up roller that holds the weft is provided downstream of the suction pipe 6.

A cutter 4 for cutting the weft thread inserted each time the weft is inserted is disposed on the side of the woven cloth W, and the cutter is pivotally rotatably attached to a fixed blade 4a fixed to a fixed shaft. It is composed of a movable blade 4b. The movable blade 4b is driven for each weft insertion through a cam and a link mechanism which are rotated in synchronization with the machine base, similarly to a known weft cutting cutter.

A guide member 9 is provided above the sley 1 and is an injection port of the main nozzle 2.
It is arranged above the main nozzle 2 along the entire swing trajectory of 2a. As shown in FIG. 2, the guide member 9 is slightly bent from the intermediate portion so that it is parallel to the swinging direction of the sley 1 behind the intermediate portion and is spaced apart from the main nozzle 2 ahead of the intermediate portion. Has been done. Further, the guide member 9 is arranged so as to pass between the main nozzle 2 and the blowing nozzle 11a when seen in a plane as shown in FIG.

In order to prevent the weft cutting, a blocking nozzle 5 for ejecting fluid toward the tip of the cutter 4, that is, the opening side, is provided to the side of the cutter 4 toward the weft track.

On the other hand, a length-measuring drum 7 as a weft length-measuring device is arranged on the side opposite to the jetting direction of the main nozzle 2, and a predetermined amount is provided on the outer periphery of the length-measuring drum by the rotational movement of the yarn guide 7a. The weft Y is wound. The wound weft is locked on the length measuring drum 7 by a weft locking member composed of a solenoid pin 8a driven by an electromagnetic solenoid 8.

The solenoid pin 8a can be moved back and forth with respect to the outer peripheral surface of the length measuring drum 7 by an electromagnetic solenoid 8 that operates in synchronization with the machine base during weft insertion. Is released, and conversely, the weft Y is locked by the forward movement. Then, the released weft yarn Y is pulled out in the weft inserting direction by the air jet from the main nozzle 2.

Next, as shown in FIG. 2, the main nozzle 2 is provided with an electromagnetic valve 21 for weft insertion that controls the air supply from the air tank 100 that stores compressed air, and also for holding the weft yarn at the time other than weft insertion. It is operated by the electromagnetic valve 22 for the breeze. or,
Similarly, for the blocking nozzle 5 and the blow-up nozzle 11a, electromagnetic valves 23, 24 that control the air supply from the air tank 100.
Respectively activated by.

The electromagnetic valves 21, 22, 23, 24, the electromagnetic solenoid 8, the other suction pipes 6, and the actuating device (not shown) for the auxiliary nozzle 12a are all control devices as control means.
Controlled by 101. Further, the control device 101 includes a signal from the feeler 10 as a detection means for detecting a weft insertion error, an encoder (not shown) for detecting the crank angle of the machine base, and other manual switches (not shown). ), Etc., based on signals from the machine to control the synchronization with the machine base and the operation timing of each operating part.

Then, normally, in synchronization with the rotation of the machine base, the control device 101 operates the electromagnetic solenoid 8 during weft insertion to release one pick of weft, and operates the weft insertion electromagnetic valve 21 to perform weft insertion. The electromagnetic valve 22 for the slight wind is operated except when weft insertion is performed, and the weft yarn from the length measuring drum 7 to the main nozzle 2 is tensioned and held.

Next, the operation of the weft processing by the device configured as described above will be described.

If weft insertion failure occurs during machine operation, feeler
When detected by 10, a weft insertion failure signal is issued, and based on this signal, the control device 101 issues a machine stop command. At the same time, the auxiliary nozzle 12 is stopped, the weft insertion electromagnetic valve 21 of the main nozzle 2 is closed, and the breeze electromagnetic valve 22 is opened.
Further, the electromagnetic valve 24 is opened to operate the blocking nozzle 5. Further, the control device 101 drives the electromagnetic solenoid 8 to retract the solenoid pin 8a from the length measuring drum 7, thereby releasing the weft yarn being stored. Then, when the weft is released by one winding to one pick as a fixed amount, the solenoid pin 8a again contacts the length measuring drum 7 and locks the weft. Such release of a certain amount of weft is set by counting the number of ballooning times of the weft drawn from the length-measuring drum 7 by a photoelectric switch or by operating for a certain time by a timer.

On the other hand, since the machine frame continues to operate inertially after stopping, the defective weft Yb is beaten after weft insertion, and at this time the sley 1 reaches the front, so that the weft is in the opening of the cutter 4 as in normal operation. Try to enter.

However, the weft yarn for one roll to one pick released from the length measuring drum 7 passes through the main nozzle 2 as shown in FIG. 3, and is sprayed by the blocking nozzle 5 near the tip of the acceleration tube 2a. Since the main nozzle 2 is largely curved in a direction away from the cutting region of the cutter 4, that is, toward the opening side of the cutter, in the opposite direction, and is blown away from the cutter 4,
Cutting is surely prevented.

In this state, the weft yarn Y remains connected between the main nozzle 2 and the defective weft yarn Yb held by the woven fabric W, and after beating, the main nozzle 2 moves rearward together with the sley 1, but Since the weft Y between the No. 2 and the defective weft Yb has a margin for the length of one roll to one pick, no unreasonable tension is applied, and therefore the weft is not cut. .

Further, the machine frame continues the inertial operation and reaches the weft insertion time again, but since the main nozzle 2 and the electromagnetic solenoid 8 do not perform the weft insertion operation by the control device 101, the weft insertion is not performed, and then the machine is stopped at a predetermined angle. To be done.

After the machine stand is stopped, the blocking nozzle 5 is stopped as shown in FIGS. 4 and 5, and instead the blowing nozzle 11a and the suction pipe 6 are activated. Due to these, an air flow is generated from the blow-up nozzle 11a toward the weft guide port 6a of the suction pipe 6 near the jet port of the main nozzle 2, so the weft Y is attracted by the negative pressure around the air flow, and the weft guide port is drawn. It is sucked into 6a.

After that, the machine base is reversed about one and a half rotations, but during this time, the warp is returned to the open state and the gripped state of the defective weft Yb is released. Further, the weft Y connected to the suction pipe 6 from the main nozzle 2 is guided along the lower end surface of the guide member 9 between the two blades 4a and 4b of the cutter 9 as the machine base is reversed. Since the blocking nozzle 5 is stopped at this point, the weft Y is reliably guided to the cutter 4 and cut at the tip of the main nozzle 2 at the normal cutting timing.

The cut defective weft yarn Yb is picked up at one end by a weft yarn take-up device located downstream of the suction pipe 6,
Removed from woven fabric W.

Then, the machine base is reversed to a position most suitable for restarting, is stopped, and is restarted.

The present invention is not limited to the above embodiment, but may be carried out as follows.

(1) In addition to the electromagnetic solenoid pin, for example, a weft locking member that operates by mechanical or fluid means during normal operation and that operates by an electromagnetic solenoid only during weft processing may be used as the weft locking member.

Further, in addition to using a length measuring drum and an electromagnetic solenoid pin for the weft length measuring device, the weft length measuring device is applied to a weft length measuring device including a combination of a storage device for temporarily storing the weft by a fluid and a gripper as a weft locking member. May be.

(2) The timing at which the weft locking device releases the weft and the timing at which the blocking nozzle operates may be any time from when the feeler's weft insertion failure signal is generated to when it reaches the front.

(3) The length of the weft released from the weft length measuring device is not particularly limited as long as the weft is reliably separated from the cutter.

(Effect of the Invention) As described in detail above, according to the present invention, it is possible to reliably prevent the cutting of a defective weft by releasing the weft from the weft measuring device and ejecting fluid to the cutter opening side when the cutter is operated. Furthermore, since a certain amount of weft is released, there is a margin in the weft length, and even if the main nozzle moves, the weft is not cut and defective wefts are not left in the woven fabric, so reliability and durability It has excellent effects such as improved properties.

Furthermore, after the cutting is blocked, the weft yarn blown up to the upper side of the main nozzle by the blowing nozzle is surely cut by a cutter that cuts the weft yarn inserted at every weft insertion during normal loom operation. It is not necessary to provide a cutter for exclusive use of the weft thread, and has a special effect that a reliable weft processing operation can be performed with a simple structure.

[Brief description of drawings]

1 to 5 show an embodiment in which the present invention is embodied. FIG. 1 is a perspective view of a weft processing device, FIG. 2 is a schematic plan view showing the structure, and FIGS. The figure is a schematic plan view showing the action, FIG. 5 is a partial perspective view showing the action, and FIG. 6 (a).
(C) is a schematic plan view showing a conventional device. 1 ... Sley, 2 ... Main nozzle, 4 ... Cutter, 5 ...
... Blocking nozzle, 7 ... Length measuring drum, 8 ... Electromagnetic solenoid, 10 ... Feeler, 13 ... Control device, Yb ... Bad weft, W ... Woven fabric.

Claims (1)

[Claims] 1. A weft length measuring device having a weft locking member that stores a predetermined amount of weft and releases and locks the stored weft during weft insertion, a main nozzle for inserting the weft, and a woven fabric. In a shuttleless loom equipped with a cutter that is disposed on the side of each of the wefts and that cuts the weft yarn between the main nozzle and the woven fabric for each weft insertion, and a detection unit that detects a weft insertion defect, When a weft insertion defect is detected, a blocking nozzle is provided to prevent the weft from being cut by injecting a fluid on the opening side of the cutter, and the weft measurement length is measured before the cutter cuts the weft based on the weft insertion defect detection signal. The weft locking member is operated to release the stored weft of the device, and a guide member extending from the cutter side to the reed side is disposed between the main nozzle and the warp row, and the guide member and the warp row are provided. Between the main nozzle and the weft blown from the main nozzle between A blowing nozzle for blowing up to the main nozzle is provided, and the weft yarn, which is prevented from being cut by the blocking nozzle and blown above the main nozzle by the blowing nozzle, is guided to the cutter side by the guide member when the sley is advanced, and is cut. Weft processing device for shuttleless loom.