JPH073023B2 - Defective weft processing device in loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to an apparatus for removing a weft yarn having an abnormal weft insertion woven into a woven fabric.

(Prior art) In the case of a weft insertion error in the jet loom, the machine is stopped based on the weft insertion error detection signal from the weft detector. Since the machine stand is stopped after the machine has been inertially operated for one rotation or more, the weft thread with a wrong weft insertion (hereinafter referred to as a miss thread) is beaten just before the machine stand is stopped and woven into the woven cloth.

A weft processing device for removing the above-mentioned miss yarn, which becomes a weaving flaw of the woven cloth, from the woven cloth is disclosed in JP-A-61-245339 and JP-A-62-41.
It is disclosed in Japanese Patent Publication No. 083. In this conventional device, when the weft is stopped due to a weft insertion error, the following weft is removed from the cutting action area of the weft cutting device for weaving on the side of the main nozzle for weft insertion that swings integrally with the reed, and The weft insertion is blocked by the jet flow from the blow nozzle and is introduced into the guide cylinder above the main nozzle for weft insertion. Then, the yarn is introduced into the housing orthogonal to the guide tube and is wound up by the winding device inside the housing. With this winding operation, the miss yarn is pulled out from the cloth fell sideways and removed.

That is, the miss yarn woven before the weaving and the following weft yarn are in a continuous state without being cut, and the miss yarn is pulled out from the main nozzle for weft insertion to the side with the succeeding weft yarn being pulled out to the side and removed. It has become so.

(Problems to be Solved by the Invention) However, although the relative position between the blow nozzle sprayed toward the guide tube and the weft insertion main nozzle is unchanged and weft insertion is reliably prevented, the miss yarn Since the guide cylinder that introduces the trailing weft, which is a clue to the drawer, is fixedly installed on the loom base side, the main nozzle for weft insertion and the guide cylinder move relative to each other during the machine inertial operation after the weft insertion error is detected. . For this reason, the weft yarn is not reliably transferred between the weft insertion main nozzle and the introduction port of the guide cylinder, and the failure yarn processing failure rate increases.

Configuration of the Invention (Means for Solving Problems) Therefore, in the present invention, a weft-insertion main nozzle that is installed on a sley and swings integrally with the reed is cut and separated for each beating. Weft cutting prevention means for invalidating the cutting action of the weaving device for weaving when the machine is stopped in the event of a weft insertion abnormality, a weft introduction duct installed on the side of the main nozzle for weft insertion, and a weft insertion A blow nozzle for blowing and inserting the weft injected from the main nozzle toward the weft introduction duct, a weft take-up means for taking the weft introduced into the weft introduction duct, and a weft take-up for the weft taken by the weft take-up means. And a weft removing cutting device for cutting and separating from the main nozzle for use, and the jet nozzle of the blow nozzle and the inlet of the weft introducing duct are provided on the sley. The weft insertion path and the suction pipe that guides the weft of the weft introduction duct at a distance from the weft introduction duct, and the sley moves to the rear of the loom. At this time, the weft take-up means is installed on the loom base side so that the weft take-up roller is located between the weft introduction duct and the suction pipe.

(Operation) That is, the injection port of the blow nozzle and the introduction port of the weft introduction duct do not change their relative positions with the main insertion nozzle of the weft insertion main nozzle, and blow into the introduction port of the weft introduction duct. It is possible to shorten the distance between the injection port and the introduction port as much as possible while always matching the injection directions of the nozzles. Therefore, the subsequent weft thread, which serves as a clue for pulling out the miss yarn on the cloth fell, is reliably introduced into the weft introduction duct by the jet fluid from the blow nozzle even during the operation of the loom, and the weft take-up means is operated after the weaving machine is stopped. It is located between the introduction duct and the suction pipe, and is transferred to the mechanical take-up action, which greatly increases the rate of successful miss yarn drawing.

(Embodiment) An embodiment embodying the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a main nozzle 2 for weft insertion is mounted on one end side of the sley 1, and is supplied from a yarn winding tube 5 onto a drum 4 forming a yarn winding surface of a weft measuring and storing device 3. The main nozzle 2 for weft insertion
The weft insertion main nozzle 2 is guided into the weft insertion path 6a of the deformed reed 6 standing on the sley 1 in synchronization with the weft insertion timing.

The thread winding tube 5 is attached to a rotary support tube 7 that holds the drum 4 stationary in a relatively rotatable manner, and the weft yarn Y introduced into the rotation support tube 7 from cheese (not shown) is guided to the thread winding tube 5. There is. The pulling out of the weft yarn from the drum 4 is controlled by the intersection and separation of the weft engaging body 9 fixed to the tip of the cam lever 8 which is swingably supported and the yarn winding surface on the drum 4, and the swinging of the cam lever 8 is controlled. The movement is performed by the action of a cam (not shown) on a drive shaft (not shown) that is rotationally driven in synchronization with the machine base. The rotation of this drive shaft is the timing pulley
The weft yarn Y is supplied from the yarn winding pipe 5 onto the drum 4 by being transmitted to the rotary support pipe 7 via the timing belt 11, the timing belt 11 and the timing pulley 12 and causing the yarn winding pipe 5 to revolve around the drum 4.

An electromagnetic solenoid 13 is installed near the tip of the cam lever 8 and its drive rod 13a is arranged toward the cam lever 8. In the projecting state of the drive rod 13a, the tip of the rod 13a abuts against the tip of the cam lever 8 and presses it, so that the weft thread catching body 9 can be held in a state of intersecting the thread winding surface. . That is, the weft measuring and storing device 3 and the electromagnetic solenoid 13 constitute a weft insertion preventing device.

When the weft yarn Y ejected from the weft-insertion main nozzle 2 is properly inserted into the weft yarn W and reaches the end of the woven fabric W on the side opposite to the main nozzle, the weft yarn is beaten by the deformed reed 6 and the woven fabric W is rewound. Woven in front of W1. Then, the beaten weft yarns are cut by the electromagnetic drive type weaving yarn cutting device 14 on the weft inserting main nozzle 2 side, and the subsequent weaving operation is continued.

If a weft insertion error occurs such that the weft does not reach the end on the side opposite to the main nozzle, the feeler 15 arranged corresponding to the end detects the weft insertion error and the weft insertion error detection signal from the feeler 15 is detected. The operation of the loom is stopped based on the above. After the weft insertion error detection signal is issued, the machine stand rotates by inertia about once and then stops. That is, a weft insertion error detection signal is issued while the sley 1 advances from the last retracted position to the woven fabric W side, and after the miss yarn Y ′ is beaten to the woven fabric W, the sley 1 further reciprocates, It stops just before the beating position shown by the chain line in FIG. With the weft insertion error detection signal, the weft cutting device 14 for weaving is put into an inoperative state, and the miss yarn Y ′ woven into the cloth fell W1 of the woven cloth W is maintained connected to the weft insertion main nozzle 2 side. In order to prevent the cutting of the weft yarn, the weft yarn may be moved to the outside of the working area of the weft cutting device by other suitable means.

Main nozzle for weft insertion 2 Sley 1 directly underneath, support on the front
16 is fixed by tightening, and a blow nozzle 17 connected to a pressure air supply source (not shown) is mounted on the support base 16. The tip end side of the injection pipe 17a of the blow nozzle 17 is curved upward, and its injection port 17b is set to direct the injection path of the weft insertion main nozzle 2.

A three-pronged support member 18 is fastened and fixed to the rear surface of the sley 1 just below the weft insertion main nozzle 2, and the support arm 18 thereof is provided.
The tips of a, 18b and 18c are curved and extended above the weft inserting main nozzle 2. A weft introduction duct 19 is mounted on the tip of the first support arm 18a, and the tip introduction side of the weft introduction duct 19 is curved downward. The introduction port 19a of the weft introduction duct 19 is set at a position opposed to the injection port 17b of the blow nozzle 17 with the injection path of the weft insertion main nozzle 2 in between, and the injection port 19a and the injection of the weft insertion main nozzle 2 are set. A blade 23 is interposed between the mouth. The air guide 20 is mounted on the tip of the second support arm 18b, and the suction pipe 21 is mounted on the third support arm 18c. The inlet is arranged on the discharge path of the outlet 19b of the weft introduction duct 19. The outlet side of the suction pipe 21 is curved toward a dust box 33 installed in front of the swing region of the sley 1, and a nozzle 22 connected to the pressure air supply source is provided in the curved portion of the suction pipe 21. It is connected so that it faces the exit.

A stepping motor 24 is installed on the loom base side behind the swinging area of the sley 1, and a drive roller 25 is disposed immediately above the stepping motor 24. Driven pulley 25b on spindle 25a
And are operatively connected by a timing belt 26. An air cylinder 27 is disposed directly above the drive roller 25, and a driven roller 29 is rotatable on the support frame 28 fixed to the tip of the drive rod 27a so as to face the drive roller 25. It is supported and can be pressed against the drive roller 25 by the protruding operation of the air cylinder 27. Air cylinder 27
A support base frame 31 is rotatably suspended and supported by a support shaft 30 protruding from the side surface of the guide shaft.
A guide pin 28a protruding from the support frame 28 is fitted in the 31a, and a weft detection device 32 having a detection arm 32a is attached to the support base frame 31.

The drive roller 25 and the driven roller 29 are set at positions facing each other with the weft introduction duct 19 and the air guide 20 sandwiched between them when the sley 1 is last retreating, and the tip end of the detection arm 32a is when the sley 1 last retreating. Air guide 20 and suction pipe in
It is set at a position that allows sweeping across 21.

With the occurrence of a weft insertion error, the sley 1 is stopped at the chain line position in FIG. 1 under the condition that the jetting is stopped in the weft insertion main nozzle 2 and the weaving device 14 for weaving is inoperative.
As a result, the weft Y1 following the miss Y'is not weft-inserted, and the miss yarn Y'is woven into the cloth fell W1 in a state of being connected to the weft inserting main nozzle 2 side. Pressure air is supplied to the blow nozzle 17 and the nozzle 22 by the weft insertion error detection signal from the feeler 15, and the blow nozzle 17 and the weft introduction guide
An air flow that crosses the weft insertion path is generated between the suction pipe 19 and the suction pipe 21, and a suction air flow is generated at the inlet side of the suction pipe 21. During the machine inertia operation from weft insertion error detection to machine stand stop, the weft engaging body 9 separates from the drum 4 and crosses again, and this crossing state is maintained by the excitation of the electromagnetic solenoid 13.
By separating and re-intersecting the weft engaging body 9, the weft Y1 for one weft insertion is ready to be pulled out on the drum 4, and the weft Y1 for one weft insertion is released from the blow nozzle 17 during the inertial operation of the machine base. It is drawn out from the weft insertion main nozzle 2 by the jet air flow and is forcibly introduced into the introduction port 19a of the weft introduction duct 19.

The jet port 17b of the blow nozzle 17 and the inlet port 19a of the weft introduction duct 19 face the jetting route of the weft-inserting main nozzle 2, that is, the relative position of the weft-inserting route invariably does not interfere with the weft insertion. The distance between the two can be shortened within the range. Therefore, it is possible to secure the injection air flow between the injection port 17b and the introduction port 19a in a state where the diffusion is extremely small, and the injection air flow is all in the introduction port 19a without being diffused to the side of the introduction port 19a. Inflow. This ensures that the weft yarn Y1 following the miss yarn Y'is forcibly introduced into the introduction port 19a without being influenced by the inertia action during the inertia operation of the loom. This certainty enables the weft introduction duct 19 to be made compact and suppresses an increase in the weight of members on the sley 1 which is required in pursuit of high-speed operation.

All the weft yarns Y1 on the drum 4 are pulled out during the inertial operation of the machine base and introduced into the weft yarn introduction duct 19. Weft introduction duct 19
The weft Y1 forcibly introduced into the inside is deflected and guided to the exit side, and is ejected toward the air guide 20. Weft introduction duct
The bent tip of the weft yarn Y1 ejected from the exit of 19 reaches the inside of the suction pipe 21 through the air guide 20 during the inertial operation of the machine base as shown in FIGS. 1 and 2, and the dust box 33 is ejected by the nozzle 22. Is exposed to. As a result, the weft yarn Y1 between the weft yarn introduction duct 19 and the suction pipe 21 is given an appropriate tension and becomes tense.

Subsequent to the stop of the machine, the machine reverses and Sley 1 retreats to the last retracted position. Thereby, the open state of the warp yarn T is formed, and the weaved state of the miss yarn Y'by the upper and lower warp yarns T is released. At the same time, weft introduction duct 19 and air guide
The weft yarn Y1 between the air guide 20 and the driven roller 29 is arranged in the pressure contact grip region between the driving roller 25 and the driven roller 29, and the weft yarn Y1 between the air guide 20 and the suction pipe 21 rotates and sweeps the detection arm 32a. Is located in the excess area, and the third
As shown in the figure, the driven roller 29 presses the drive roller 25 while sandwiching the weft Y1. That is, the weft Y1 introduced into the weft introduction duct 19 is reliably delivered from the blowing action of the blow nozzle 17 to the mechanical take-up action of the roller pair 25, 29.

As the driven roller 29 moves downward, the guide pin 28a and the guide hole 3
The support base frame 31 is rotated about the support shaft 30 by the engagement action with the 1a, and the detection arm 32a is rotated and swept across the space between the air guide 20 and the suction pipe 21. Therefore, the detection arm 32a relatively rotates with respect to the main body of the weft detection device 32 by the engagement of the weft yarn Y1 which is tensioned between the roller pair 25, 29 and the suction pipe 21, and the weft detection device 32 detects the presence of the weft yarn. Detection signal is emitted. As a result, the stepping motor 24 is rotated by a predetermined amount, and the driving roller 25 and the driven roller 29 rotate while holding the weft Y1. By rotating both rollers 25 and 29, weft Y1
Is taken up to the suction pipe 21 side, and the weft Y1 is picked up by the blade body 23 by this take-up tension.
At the same time, the miss yarn Y'on the cloth fell W1 is separated from the cloth fell W1. When the tip of the miss yarn Y'passes through the roller pair 25, 29, the miss yarn Y'is discharged toward the dust box 33.

The present invention is of course not limited to the above-mentioned embodiment, and for example, as shown in FIG.
A blow nozzle 36 is installed in front of 4,35, and a weft introduction duct 3 is placed behind the main nozzles 34,35 for inserting both wefts.
7 is installed, and the injection port 36a of the blow nozzle 36 and the introduction port 37a of the weft introduction duct 37 are positioned relative to the main insertion nozzles 34, 35 with the injection paths of the main insertion nozzles 34, 35 sandwiched therebetween. An embodiment in which the weft yarn is introduced into the weft yarn introduction duct 37 is not changed, and the weft yarn introduced into the weft yarn introduction duct 37 is swung to the last retracted position of the sley 1 after the machine stand is stopped.
Definitely delivered to the mechanical pick-up action of 9. A blade body 39 for removing the weft thread is attached to the blow guide 38 fixed to the tip of the blow nozzle 36.
The weft yarn is cut in cooperation with the take-up action of. In addition,
The detection of the weft yarn drawn into the weft yarn introduction duct 37 side is performed by an optical sensor (not shown) in the air guide 20.

In addition, in the present invention, a weft removing cutter is installed on the loom base side, an electromagnetic drive type cutter is used as the cutting device, or a loom is prevented from occurring when the machine stand is stopped except when a weft insertion error occurs. The present invention can also be applied to the case where the weft insertion process is performed immediately before the machine stand is stopped.

EFFECTS OF THE INVENTION As described in detail above, the present invention generates a jet flow across the jet path of the weft-insertion main nozzle between the blow nozzle whose relative position is invariable with respect to the weft-insertion main nozzle and the weft introduction duct. As a result, not only the succeeding weft thread connected to the weft thread with an abnormal weft insertion can be reliably sprayed and inserted into the weft thread introduction duct for delivering to the take-up action of the mechanical take-up means, but a high miss thread handling capacity can be achieved. In addition, the entire device is lightweight and compact, and has the excellent effect of not impeding high-speed operation.

[Brief description of drawings]

1 to 3 show an embodiment embodying the present invention.
FIG. 4 is a schematic plan view of the vicinity of the sled, FIG. 2 is a perspective view of a main portion during machine inertial operation, FIG. 3 is a perspective view of a main portion showing a weft holding state by a roller pair, and FIG. 4 is another example. It is a principal part perspective view. Sley 1, weft insertion main nozzles 2,34,35, blow nozzles 17,36, jets 17b, 36a, weft introduction ducts 19,37, introduction ports 19a, 37a, blade 23 as a weft cutting device for weaving , 39, a driving roller 25 and a driven roller which constitute the weft thread take-up means.
29, similarly stepping motor 24 and air cylinder 27,
Trailing weft Y1 and miss yarn Y '.

Claims (1)

[Claims] 1. A cutting operation of a weft cutting device for weaving, which is installed on a sley and cuts and separates a normal weft insertion weft insertion from a main weft insertion nozzle that swings integrally with the reed. Weft cutting prevention means that is invalidated when the machine is stopped in the event of an abnormality, a weft introduction duct that is installed on the side of the main weft insertion nozzle, and a weft that is ejected from the weft insertion main nozzle to the weft introduction duct. A blow nozzle for spraying and inserting toward the weft, a weft take-up means for taking the weft introduced into the weft introduction duct, and a weft removing cutting device for cutting and separating the weft taken by the weft take-out means from the main weft-inserting nozzle. On the sley,
The injection port of the blow nozzle and the introduction port of the weft introduction duct are set such that the relative position of the main nozzle for weft insertion does not change and the weft insertion path is sandwiched, and the weft introduction duct is spaced from the weft introduction duct. When a suction pipe that guides the weft of the above is set and the sley is moved to the rear of the loom,
A defective weft processing apparatus in a loom, wherein the weft take-up means is installed on the loom base side so that a weft take-up roller is located between the weft introduction duct and the suction pipe.