JPH0512450B2 - - Google Patents

Description

Detailed Description of the Invention Technical Field The present invention winds a weft supplied from a weft supply section onto a winding surface of a weft length measuring device by a drive means separate from a machine drive source, and when inserting the weft, the same weft is The present invention relates to a threading method in a fluid jet loom that is pulled out.

Prior Art In general, weft supply errors in fluid injection type looms aiming at higher speeds occur, that is, weft yarns that should be injected from the main nozzle into the warp opening in synchronization with the weaving timing of the loom are injected from the same nozzle for some reason. When this happens, the loom must be stopped and this misfeed must be dealt with. The weft yarn supplied from the weft supply section passes through the yarn winding tube that continuously rotates around the drum, and is wound and stored on the yarn winding surface of the drum while being measured, and the weft yarn that has been wound and stored is In a loom where the weft is injected from the main nozzle into the warp opening, if a feeding error occurs in which the weft is cut between the main nozzle and the drum and the weft is not ejected from the main nozzle, the weft at the weft supply section It gets wrapped around the drum. Conventionally, this feeding error process of guiding the weft end on the weft supplying unit side into the main nozzle has been performed manually. Therefore, this supply error processing operation becomes very complicated, and the loom stops for a long time, which hinders the improvement in productivity which is the reason why the fluid jet loom is designed for high speeds.

Further, as long as the above-mentioned weft supply error processing (hereinafter referred to as "threading") is performed manually, it will not be possible to cope with the automation of the loom.

Purpose The present invention has been made in consideration of the above-mentioned facts, and its purpose is to create a fluid jet loom capable of threading without complicated manual work and capable of adapting to automation of the loom. The object of the present invention is to provide a threading method.

Configuration In order to achieve the above object, in the present invention, when a weft supply error occurs between the weft length measuring device and the main nozzle, the machine once stopped is reversed to a predetermined position and then stopped again, The fluid ejecting means disposed between the length measuring device and the main nozzle is activated, the weft is guided from the length measuring device into the main nozzle, and the weft ejected from the main nozzle is directed to the weft insertion path. Measures have been taken to guide the people to the outside of the area.

Embodiment Hereinafter, an embodiment embodying the present invention will be described based on the drawings.A support body 1 attached to a fixed part such as a side frame of a loom receives weft yarns supplied from a weft supply section 2. Weft guide hole 3 for guiding
A rotary support shaft 3 having a diameter a is rotatably installed through the machine, and is rotated by a motor 4 different from the machine drive source. A gear 5 is fixed to the front surface (weft insertion side) of the support body 1, and a support body 6 fixed to the rotating shaft 3 is provided on the front side thereof. The support body 6 has a yarn winding tube 7 obliquely intersecting with the rotating support shaft 3 and communicating with the weft guide hole 3a.
is mounted and supported, and its tip is disposed on a first tapered circumferential surface 9a of the drum 9, which will be described later.
A bracket 8 is provided on the front side of the support body 6 and is relatively rotatably attached to the rotary support shaft 3. A gear 8a is integrally formed on the circumferential surface of the bracket 8. A drum 9 having a thread winding surface consisting of a tapered peripheral surface 9a and a second tapered peripheral surface 9b.
is fixed to the rotation support shaft 3 so as to be relatively rotatable. Further, a planetary gear mechanism 10 is attached to the support body 6, the input planetary gear 10a is meshed with the gear 5, and the output planetary gear 10b is connected to the gear 8a.
are interlocked with. Gear 5 and input planetary gear 10
a and the gear ratio are set to be the same as the gear ratio of the gear 8a and the output planetary gear 10b. Therefore, when the motor 4 is driven and the rotation support shaft 3 is rotated, the thread-wound tube 7 rotates together with the support shaft 3, and the planetary gear mechanism 10 also rotates together, so that both planetary gears 10a, 10b revolves around the rotary support shaft 3 while meshing with the gears 5 and 8a, and the drum 9 is held stationary without rotating.

The first tapered peripheral surface 9a of the drum 9 has the same peripheral surface 9a.
A first weft locking pin 11 is provided that retracts from the
A second weft locking pin 12 that protrudes and retracts from the second tapered peripheral surface 9b is provided. Both weft locking pins 11 and 12 are alternately moved in and out by a cam mechanism and a crank mechanism (not shown) linked to the rotation support shaft 3.

Near the outer periphery of the drum 9, the weft locking pin 1
1 and 12, a U-shaped weft regulating member 13 is provided perpendicular to the weft insertion direction, and in front of the second locking pin 12 is a reflective weft detection device consisting of a light emitting/receiving element. 14 are provided. The detection device 14 is normally kept in an inactive state.

In front of the drum 9, a guide nozzle 15 is provided as a fluid ejecting means having a trumpet-shaped introduction part 15a, and a guide nozzle 15 is provided as a fluid ejecting means, and the guide nozzle 15 is provided as a fluid ejecting means, and has a ripple-shaped introduction part 15a.
The weft yarn Y, which is wound and stored on the yarn winding surface of the drum 9 through the yarn winding tube 7, is guided to the main nozzle 17 mounted on the slay 16. The nozzle 15 is normally kept inactive.

Note that a trumpet-shaped introduction pipe 18 is attached to the weft introduction side of the main nozzle 17.

A guide suction pipe 20 as a guide means having a slit 20a connected to the injection nozzle 19 is provided on the side of the second tapered peripheral surface 9b of the drum 9, and is moved in the radial direction of the drum 9 by an electromagnetic solenoid 21. It is possible. The injection nozzle 19 and the guide suction tube 20 are always placed in the retracted position shown in FIG.

On the side between the guide nozzle 15 and the main nozzle 17, there is a first suction pipe 22 connected to a suction device (not shown) and a shielding plate 2 attached to the first suction pipe 22.
3 is provided. Although the first suction pipe 22 and the shielding plate 23 are always placed in the retracted position shown in FIG. When a weft supply error occurs, it is activated based on a weft supply error detection signal from the detection device S1, and is advanced from the retracted position to the weft path by a drive device (not shown) such as an air cylinder or an electromagnetic solenoid. It's becoming like that.

A second suction pipe 25 having a shielding plate 24 is provided near the injection port side of the main nozzle 17 . The suction pipe 25 is operated based on the weft supply error detection signal or the weft insertion error detection signal described later, and is moved from the retracted position shown in FIG. progress has been made until now.

The weft yarn Y ejected from the main nozzle 17, which is operated in synchronization with the weft insertion timing, passes through the guide holes 2 of the weft yarn guide members 26 arranged in parallel on the slay 16.
The weft is inserted into 6a. When the weft yarn Y is inserted normally and reaches the end of the woven fabric W on the side opposite to the weft insertion side, the weft yarn Y is inserted through the guide hole 26a of the weft guide member 26 while the slay 16 moves forward in the direction of the arrow in FIG. The weft thread escapes through the slit 26b, is driven into the front of the woven fabric W by the reed 27 on the slay 16, is woven into the woven fabric W, and is placed near the weft insertion side fabric edge of the woven fabric W. It is cut by a cutter 28 provided. Then, the subsequent weaving operation is continued. If a weft insertion error occurs in which the weft Y does not reach the cloth end on the opposite side of the weft insertion, a weft detection device (not shown) provided on the weft guide member 26 located near the cloth end is detected. detects a weft insertion error, and the machine is stopped based on a weft insertion error detection signal from the detection device. The weft detection device is composed of light emitting/receiving elements arranged opposite to each other across the slit 26b of the weft guide member 26, and emits a weft insertion error detection signal when the weft does not pass through the slit 26b during beating. . After the weft insertion error detection signal is issued, the machine rotates approximately one and a half times due to inertia and then stops. That is, when a weft insertion error occurs, the weft insertion error detection signal is issued while the reed 27 moves forward in the direction of the arrow from the most retracted position shown by the solid line in FIG. 2, and after the erroneous yarn is beaten, The reed 27 once returns to the most retracted position, moves forward again, and stops just before the reed is hit. During this inertial operation, weft insertion following the misplaced yarn is performed and the weft is ejected from the main nozzle 17, but the ejected weft is advanced from the retracted position to the weft path based on the weft insertion error detection signal. It is sucked by the second suction pipe 25.

In this embodiment, when a weft supply error occurs, the process is automatically performed based on a weft supply error processing program. The operation of weft processing when a weft supply error occurs will now be described.

The motor 4 is driven in synchronization with the weaving operation of the machine, and when the winding tube 7 revolves around the stationary drum 9, the weft guide hole 3a and the winding tube 7 are removed from the weft supply section 2. The weft yarn Y fed through the first tapered circumferential surface 9a is wound around the first tapered circumferential surface 9a and its length is measured while being locked by the first weft locking pin 11 protruding from the first tapered circumferential surface 9a. Before the weft yarn Y is wound around the first tapered circumferential surface 9a by the weft insertion length, the first weft locking pin 11 sinks into the drum 9, and the weft Y wound around the first tapered circumferential surface 9a. moves onto the second tapered circumferential surface 9b and is locked by the second weft locking pin 12 protruding from the second tapered circumferential surface 9b. Then, while the first weft locking pin 11 is sunk into the drum 9, the weft Y is transferred to the second tapered circumferential surface 9.
Further supplied on b. When the weft Y is wound around the second tapered circumferential surface 9b by the weft insertion length, the first weft locking pin 11 is projected from the first taper circumferential surface 9a, and the first weft locking pin 11 and the second The weft yarn Y corresponding to the weft insertion length is temporarily stored between the weft yarn locking pin 12 and the weft yarn locking pin 12. Thereafter, when the second weft locking pin 12 is inserted into the drum 9, the weft Y is pulled out from the drum 9 by the fluid jetted from the main nozzle 17 and inserted. During this time, the weft Y is being wound around the first tapered circumferential surface 9a while being locked by the first weft locking pin 11.

If the weft yarn is cut between the drum 9 and the main nozzle 17, the weft yarn to be inserted will not be supplied into the main nozzle 17. Then,
The weft detection device S1 in the main nozzle 17 detects a weft supply error and issues a weft supply error detection signal. Based on this feeding error detection signal, the machine base stops at the same rotational position as when the weft insertion error occurred, that is, just before beating the reed, and then the machine base is automatically reversed, and the reed 27 is moved to the final position shown in FIG. It stops at the retracted position (that is, the main nozzle 17 is at the most retracted position as shown in FIG. 3 and is in the injection operation state).
At the same time, the operation of the motor 4 is stopped. Also,
Based on the supply error detection signal, the first and second suction pipes 22 and 25 are advanced to the weft path as shown in FIG. 3 and suction is started, and the guide nozzle 15 and the weft detection device 14 are activated It is placed. The motor 4, which is rotated in synchronization with the machine base, stops in synchronization with the machine base, and when the motor 4 stops, the second weft locking pin 12 is in a protruding state.

The motor 4 is rotated by a predetermined amount immediately after stopping, and the second weft locking pin 12 is recessed into the drum 9, and the first weft locking pin 11 is projected from the drum 9.

When the weft (hereinafter referred to as Y') on the side of the weft supply section 2, which cannot be supplied into the main nozzle 17 due to the cutting phenomenon, is inserted into the guide nozzle 15, the weft Y' is ejected from the guide nozzle 15. Due to the action and the suction action of the first suction pipe 22, the same pipe 2
Immediately sucked into 2. Then, the weft wound around the second tape peripheral surface 9b of the drum 9
Y' is pulled out from the same drum 9, and the weft detection device 1
Detected by 4. Based on this detection result, the injection nozzle 19 and the guide suction pipe 20 are held in the retracted position as shown in FIG. 3, and the injection nozzle 19 is placed in an inoperative state. The weft yarn Y' sucked into the first suction pipe 22 is detected by a weft detection device S2 comprising a light emitting/receiving element provided in the first suction pipe 22, and a weft detection signal is emitted from the detection device S2. When the weft yarn Y' is pulled out from the drum 9, it is in the state shown in FIG. The motor 4 is rotated by a predetermined amount based on the weft detection signal from the weft detection device S2, the thread-wrapping tube 7 rotates once around the drum 9, and the weft yarn Y' unwound from the winding tube 7 reaches the first position.
It is wound once on the first tapered circumferential surface 9a while being locked by the weft locking pin 11. In this state, the weft yarn Y' is cut by a cutter (not shown) provided between the guide nozzle 15 and the first suction pipe 22.
The suction pipe 22 then returns to the retracted position.

When the first suction pipe 22 returns to the retracted position, the motor 4 is operated for a predetermined time, and the second weft locking pin 1
2 appears once each. That is, the weft yarn Y' let out from the yarn winding tube 7 is wound and stored on the drum 9 by at least the length of one weft insertion, and then
The weft locking pin 12 reaches a state recessed into the drum 9. Therefore, the weft yarn Y' is introduced by injection into the introduction tube 18 from the guide nozzle 15. Main nozzle 17
is in the operating state as described above, and the weft yarn Y' introduced into the introduction pipe 18 is guided into the main nozzle 17 by the ejector action of the main nozzle 17 and is jetted from the same nozzle 17. The weft yarn Y' ejected from the nozzle 17 is sucked into the second suction pipe 25 which has been advanced up to the weft path as shown in FIG. It is detected by the detection device S3. Based on the weft detection signal from the detection device S3, that is, the threading end signal, the weft Y' is cut by a cutter (not shown) provided near the injection port of the main nozzle 17, and the operation of the guide nozzle 15 is stopped. Further, the second suction pipe 25 returns to the retracted position. When the second suction pipe 25 returns to the retracted position, the machine base is automatically reversed by a predetermined amount and stops at the rotational position most suitable for restarting, and the motor 4 is operated between the weft length measuring device side and the machine base side. It will run until synchronized. The loom will then automatically resume operation.

When the weft Y' from the weft supply unit 2 side, which cannot be fed into the main nozzle 17 due to the cutting phenomenon, is not inserted into the guide nozzle 15 and is entirely wound on the drum 9, the same weft Y' is not pulled out from the drum 9 by the guide nozzle 15 at this point. Therefore, the same weft yarn Y' is detected by the weft yarn detection device 1.
Based on this result, the electromagnetic solenoid 21 is activated, and the injection nozzle 19 and the guide suction pipe 20 are moved from the retracted position to the drum 9 side as shown in FIG.
9 is started. Therefore, the weft yarn Y' wound on the drum 9 is suction-guided from the slit 20a into the suction tube 20 by the suction action of the guide suction tube 20, and is guided to the introduction part 15a of the guide nozzle 15. Then, the weft yarn Y' is guided into the nozzle 15 by the ejector action of the nozzle 15, and is ejected from the nozzle. Weft Y' is guide nozzle 1
The operation after being inserted into the tube 5 is similar to the operation described above. Note that the injection nozzle 19 and the guide suction tube 20 return to the retracted position when the weft yarn Y' is detected by the weft yarn detection device S2.

As described above, in this embodiment, if a weft breakage occurs between the drum 9 and the main nozzle 17 and a weft supply error occurs in which the weft is not supplied into the main nozzle 17, the weft supply unit 2 side Since the weft yarn is guided into the main nozzle 17 by the fluid ejecting means consisting of the guide nozzle 15, the complexity associated with the conventional work of handling weft supply errors manually is eliminated, and the second suction pipe 25 The weft detection device S3 installed inside
When Y' is detected, a yarn threading end signal is issued to stop the operation of the fluid ejecting means, so that weft supply error processing can be automatically performed. Therefore, the present invention can cope with the recent trend towards automation of looms, can reduce the downtime of fluid jet looms aimed at improving productivity, and can also cope with the trend towards higher speeds of looms. It is something that can be dealt with.

It should be noted that the present invention is not limited to the above-mentioned embodiments. For example, a clutch mechanism may be used to take the driving force of the weft length measuring device from the machine drive source during normal operation of the loom, and when a weft supply error occurs, the clutch mechanism may be used. By switching the mechanism, the driving force for the weft length measuring device can be obtained from the auxiliary motor, the guide suction tube 20 can be made fixed, the introduction part 15a of the guide nozzle 15 can be configured as a separate nozzle, or the guide suction tube 20 can be configured as a separate nozzle, or The present invention can also be embodied in a fluid injection type loom using a weft length measuring device in which the tube 7 is stationary and the drum side rotates.

Effects As described in detail above, according to the present invention, when a weft supply error occurs, the machine rotates a predetermined amount to the threading position, activates the fluid jetting means, and transfers the weft from the weft supply section to the weft insertion main Since it is guided to the nozzle side,
Unlike conventional methods, when a weft supply error occurs, threading can be done quickly and easily without the need for complicated manual work, and the weft supply error is automatically handled to cope with the recent trend toward automation in looms. It has the excellent effect of being able to

[Brief explanation of drawings]

The drawings show an embodiment embodying the present invention; FIG. 1 is a schematic plan view of the main parts on the weft insertion side, FIG. 2 is a side view of the same, and FIG. FIG. 4 is a schematic plan view of main parts showing changes from FIG. 3, and FIG. 5 is a schematic plan view showing an example of weft supply error processing. Weft supply unit...2, Motor...4, Yarn winding tube...
...7, Drum...9, Guide nozzle as fluid ejection means...15, Main nozzle...17, Spray nozzle...19, Guide suction pipe as guide means...
20, weft detection device S1, weft...Y, Y'.

Claims (1)

[Scope of Claims] 1. The machine has a weft length measuring device equipped with a drive means separate from the machine drive source, and winds the weft supplied from the weft supply section onto the yarn winding surface of the length measuring device, and In a loom in which the same weft thread is pulled out to the main nozzle for weft insertion during insertion, when a weft supply error occurs between the length measuring device and the main nozzle, the loom that has been stopped is reversed to a predetermined position. Afterwards, the weft is stopped again, and the fluid jetting means disposed between the length measuring device and the main nozzle is activated, and the fluid jetting means is guided by the fluid jetting means from the length measuring device side into the main nozzle, and is further jetted from the main nozzle. A threading method for a fluid jet loom, characterized by guiding a weft thread outside a weft insertion path. 2. The threading method for a fluid jet loom according to claim 1, wherein the driving means is a motor rotated in synchronization with the loom. 3. The threading method for a fluid jet loom according to claim 1, wherein the weft thread is guided by a guiding means from the weft length measuring device side to the fluid jetting means side. 4. The thread threading method in a fluid jet loom according to claim 1, wherein the detection of the weft supply error is performed by a weft detection device provided in the main nozzle.