JPS58214556A - Warping inhibiting apparatus of jet 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 The present invention relates to a weft insertion prevention device for a shuttleless loom, more particularly for an air jet loom or a water jet loom.

In order to speed up the weaving operation, an air jet loom or a water jet loom is used in which measured weft yarns are inserted into a shed formed between upper and lower warp yarns using a jet nozzle. In such high-speed looms, since the weaving speed is high, the impact of stopping the loom on productivity decline is more significant than in conventional MVA. Therefore, Jetloo 11
It is desirable that the stop time be as short as possible.

On the other hand, in jet looms, unlike conventional frame looms, the weft threads are moved through the shed by air or fluid such as water without using a shuttle, so weft insertion errors are more likely to occur than in frame looms. . In other words, the weft may not be supplied from the jet nozzle, or a so-called weft supply error may occur.
Although the weft yarn is supplied from the jet nozzle, it may not reach the selvage yarn on the opposite side of the jet nozzle, which may cause a so-called conveyance error.

In addition, in jet looms operating at high speeds, even if the drive of the N machine is stopped immediately after a weft insertion error is discovered, in order to prevent parts of the loom from being destroyed due to excessive deceleration, The timing is selected so that after a weft insertion error is detected, the machine stops after approximately one cycle of inertia operation.

Therefore, conventionally, when the jet loom is stopped due to a weft insertion error signal, the next weft insertion cycle is performed before the jet loom stops. Therefore, it is necessary to reverse the machine and remove not only the weft yarn in which the weft insertion error occurred, but also the weft yarns inserted in the cycle of the weft insertion error. By the way, the weft inserted after the weft insertion error i is beaten like a normal weft and is rarely firmly held, so it cannot be easily removed, and the removal work is very time consuming. However, when reversing as described above, it is necessary to reverse the loom by operating each part of the loom according to complicated work procedures in order to repair the weft insertion error and restart the loom, which requires a great deal of skill. There is.

Also, warp threads (including selvedge threads) may be cut during weaving work,
When the loom is switched off by human operation,
For the same reason as mentioned above, the iai operates for about one cycle due to inertia and then stops. If it is attempted to remove the weft inserted during this inertial movement in order to prevent defects such as weaving steps from occurring in the woven fabric, it is not easy to remove it for the same reasons as mentioned above.

The present applicant has developed a jet loom repair method that can easily repair jet looms caused by errors in weft insertion, warp thread breaks, or stops due to manual operation, without requiring any skill. As a treatment method for weft yarns, broken warp yarns, etc., the measured weft yarns are processed using a jet nozzle.
When an abnormal stop signal of the loom is detected in the jet loom where the weft is inserted into the shed formed between the upper and lower warps, the loom is braked while preventing open weft insertion until the loom stops.
Next, we proposed a method for disposing of misplaced yarns in a jet loom, in which the machine is reversed until it is capable of disposing of the misplaced yarns that caused the abnormal stop signal to be sent, without supplying weft yarns to the shed.

The present invention provides an apparatus that is most suitable for carrying out the above-described mis-yarn processing method, and inserts weft yarns into a shed formed between upper and lower warp yarns using pressurized fluid sprayed from the diene 1 to the nozzle. This jet loom weft insertion device has a jet loom weft insertion device in which a weft nozzle is installed so that its tip can be positioned near the weft path.

The present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a side view showing an outline of the drive system of the air jet room according to the present invention.
Power is transmitted from the crankshaft 1 to the crankshaft 15 via a transmission member such as a V-belt 13. crankshaft 1
5 drives the yarn beam 19 through a variable speed 11117 to unwind the warp threads 21, and also frictionally drives the winding roller 32 with the surface roller 31 to wind up the woven fabric 33. The speed change ratio of the transmission 17 is adjusted according to the displacement of the tension roller 23, and the tension of the warp threads let out via the back roller 22 is set to a predetermined value. crankshaft 71-1
5 further moves the heald frame 24 up and down to cause the warp threads 21 to perform the required shedding movement, and also moves the reed 25 and weft insertion guide 26 attached to the sled 21 supported on the locking shaft 29 via the sled sword 28. The machine is moved between the solid line position and the broken line position to beat the inserted weft yarn. The above configuration is the same as a conventional air jet room.

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

From the cheese 41 through the tensor 42 to the feed roller 43
The weft yarn 44 is unwound and stored in the pool pipe 46 by the air nozzle 45. The sub-length drum 50 is linked to the crank shirts 1 to 15 (FIG. 1), and also frictionally drives a feed roller 43, so that the weft yarn 44 of a predetermined length is rotated according to the rotation of the crankshaft 15 (FIG. 1).
is measured by the feed roller 43, and the air nozzle 45
supplied to The pool pipe 4G has an axial slit 47 on one side thereof, and the weft 44 stored in the pool pipe 4θ can be taken out through the slit 41. Note that instead of the above-mentioned length measuring and storage mechanism combining a feed roller and a pool pipe, for example,
A vice-length storage mechanism disclosed in Japanese Patent No. 46 and Japanese Patent Application Laid-Open No. 56-58028, in which a weft is wound around the circumferential surface of a length-measuring drum to prevent unwinding from the length-measuring drum, may be used. .

Pool pipe 46 and main air jet nozzle 49
A gripper 48 is provided in between to control the supply of the weft yarn 44 from the pool pipe 46 to the main air jet nozzle 49. The main air jet nozzle 49 injects compressed air in synchronization with the rotation of the crankshaft 15 (FIG. 1), inserts the weft yarn 44 into the shed formed between the upper and lower warp yarns 21, and inserts the weft yarn 44 into the shed formed between the upper and lower warp yarns 21. Hit.

The above structure is the same as a conventional air jet room.

Furthermore, in the embodiment of the present invention, the main air jet nozzle 4
Near the selvage yarn on the opposite side of the weft yarn 9, there are provided detectors 51 and 52 of an appropriate type such as a photoelectric type, mechanical type, or fluid type to detect whether or not the weft yarn 44 is reliably inserted. It is detected that the weft yarn 44 is being reliably supplied from the main air jet nozzle 49 in accordance with the method described in Publication No. 54-21475.

Next, a first embodiment of the weft insertion prevention device of the present invention will be described.

A known ejector type suction nozzle 61 is provided between the main air jet nozzle 49 and the selvage thread, which generates a suction force by the action of compressed air. A suitable reciprocating member 62 such as an air cylinder or an electromagnetic solenoid is connected to the suction nozzle 61, and the operation of the reciprocating member 62 causes the tip of the suction nozzle 61 to move the weft yarn injected from the main air jet nozzle 49. It is possible to move between a curled position and a position near the weft path from the weft path.

A guide plate 63 whose tip is formed in an arc shape toward the main air jet nozzle 49 is fixed to the tip of the suction nozzle 61, and when the suction nozzle 61 moves back, the guide plate 63 moves away from the weft path. Furthermore, when the suction nozzle 61 moves forward, the guide plate 63 intersects with the spinning path. Suction nozzle 6
A bellows-type expansion joint 66 is connected to the rear end of the suction nozzle 61 so that the suction nozzle 61 can be smoothly moved. Note that the suction nozzle 61 and the guide plate 63 integrally formed therewith are not limited to those that move in the longitudinal direction of the loom, but may be of a type that rotates in the vertical direction, for example. 64 is a weft cutting cutter attached near the tip of the main air jet nozzle 49, and 65 is a valve for controlling the jetting of air into the suction nozzle 61.

Furthermore, between the main air jet nozzle 49 and the gripper 48? ! An auxiliary gripper 12 is provided which is opened and closed by a magnetic solenoid 11 or an air cylinder (not shown). 13 is a photoelectric type, mechanical type, or fluid type feeler.

The feed roller 43 described above is rotatably supported at the tip of an arm 83 that is rotatably supported around the bin 81 . A spring 85 is stretched over the end of the arm 83 opposite to the support end of the feed roller 43, and is always biased so that the arm 83 contacts the tip of the piston of the air cylinder 86 or the armature of the electromagnetic solenoid.

Therefore, due to the action of the spring 85 and the air cylinder 86, the feed roller 43 can take a state where it is pressed against the length measuring drum 50 and driven by friction, or a state where it is separated from the length measuring drum 50 and is not driven by the sub-length drum 5o. can. 87 is a brake shoe for braking the feed roller 43 separated from the length measuring drum 50 by frictionally contacting the same.

Next, the operation of the first embodiment of the insertion prevention device of the present invention will be explained with reference to FIGS. 2 and 3.

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 tensor 42 is measured by a feed roller 43 that rotates in accordance with the rotation of the crankshaft 15 (FIG. 1), and then transferred to the air nostle 4.
5 (FIG. 2), the liquid is stored in the pool pipe 46.

The gripper 48 provided between the pool pipe 46 and the main air jet nozzle 49 and the main air jet nozzle 49 are operated and controlled in synchronization with the rotation of the crankshaft 15 (FIG. 1) to inject from the main air jet nozzle 49. The compressed air is used to feed the weft yarns 44 stored in the pool pipe 46 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 air jet nozzle 49 detect when the warp threads 21 are almost closed (
Check the weft insertion condition at a crank angle of 250 to 300 degrees), and if for some reason the weft inserted into the shed does not reach the selvage yarn on the opposite side of the main air jet nozzle 49, a so-called weft insertion error occurs. Detector 51.52
emits a weft insertion error signal.

The motor 11 (
The operation shown in Fig. 1) is stopped and inertia operation begins.

Furthermore, when a weft insertion error signal is transmitted, the reciprocating member 62
The piston moves forward to cause the guide plate 63 fixed to the tip of the suction nozzle 61 to intersect with the weft path. In this way, the weft yarn ejected from the main air jet nozzle 49 when weft insertion is incorrectly inserted is guided by the guiding plate 63°C and sent to the suction nozzle 61. Weft insertion is prevented.

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, prepare for a comeback. That is, the main air jet nozzle 49 is rendered inoperative. Close the gripper 48 or close the auxiliary gripper 72 by the electromagnetic solenoid 71.
Close. Further, the air cylinder 86 is operated to separate the feed roller 43 from the length measuring drum 50, thereby disabling the weft supply mechanism. On the other hand, the piston of the reciprocating member 62 is moved backward to remove the guide plate 63 at the tip of the suction nozzle 61 from the weft path. In this state, the drive motor 11 (Fig. 1) is directly reversed, or an auxiliary motor (not shown) provided separately from the drive motor 11 is operated to rotate the machine approximately 480 degrees.
By reversing the warp threads 21, the warp threads 21 are brought into an open state (180 degrees in terms of crank angle).

In this open state, by manually removing the weft yarn 44 that was incorrectly inserted, and then turning on the switch,
Alternatively, the machine automatically removes the weft threads that have been inserted incorrectly and turns on the machine, and the machine is reversed approximately 270 degrees until the warp threads 21 are closed (crank angle approximately 270 degrees), which is suitable for starting the air jet loom. Do it like this.

In this state, the preparations necessary for startup are automatically performed. That is, the end of the weft suctioned by the suction nozzle 61 is cut by the weft cutting cutter 64 attached to the tip of the suction nozzle 61. The main air jet nozzle 49 is activated. The N magnetic solenoid 71 is de-energized to open the auxiliary gripper 72, while the gripper 4
8 is also assumed to be in a steady operating state. Further, the feed roller 43 is pressed against the circumferential surface of the length measuring drum 50 by contacting the piston of the air cylinder 86 to put the weft supply mechanism into operation.

In this state, restart the operation of the air jet room.

As described above, according to the present invention, weft insertion can be prevented by suctioning the weft yarn to the suction nostle until the machine stops after detecting a weft insertion error. Therefore, after that, all you have to do is reverse the machine to a state where it is possible to take up the bales of the weft yarns that have made mistakes, and remove only the weft yarns that have made mistakes in weft insertion, and the work can be done easily and quickly. The machine can be restarted, and the productivity of the air jet loom will hardly decrease due to weft insertion errors.

In addition, it is only necessary to remove the weft thread that was mis-inserted, and compared to the conventional method where at least two weft threads (the weft thread that was mis-inserted and the weft thread that was inserted in the subsequent cycle) are removed individually, Automation of processing becomes extremely easy.

Another method of using this embodiment will be explained with reference to FIGS. 2 and 4. In this method of use, the machine is braked and temporarily stopped while blocking the weft insertion, and then the machine is reversed to a state where it is possible to remove the missed weft thread. The method is the same. In this usage method, after removing the weft thread that was incorrectly inserted, and before restarting the machine, it is sucked into the suction nozzle and the weft thread that was bypassed is used to insert the weft thread for one pitch.
(called "one-shot weft insertion"), and then restarted.

That is, after the mis-inserted weft is removed, the electromagnetic solenoid 11 remains energized to keep the auxiliary gripper closed, and the gripper 48 also keeps closed. In this state, the air injection timing of the main air jet nozzle 49 and the auxiliary nozzle is controlled by a solenoid valve (not shown), and the air injection timing that was stored in the suction nozzle 61 is injected at a timing different from that during normal operation. Tighten the weft yarn into the shed at low speed. The auxiliary nozzle is formed integrally with the weft insertion guide or separately.

In this state, the preparations necessary for startup are automatically performed. That is, the electromagnetic solenoid 71 is de-energized, the auxiliary gripper 72 is opened, and the gripper 48 is also brought into a steady operating state. Furthermore, the piston of the air cylinder 86 is moved back to press the feed roller 43 against the circumferential surface of the length measuring drum 50, thereby putting the weft supply mechanism into operation. In this state, restart the operation of the air jet room.

In the above-mentioned first usage method, since the weft has not been inserted after removing the weft thread that was mis-inserted, the machine is further reversed and the machine can be started, but in this usage method, the weft thread that was mis-inserted is removed. After unloading, the weft is inserted by inserting 1 shot l-11, so the machine is rotated forward (not in reverse).
(approximately 90 degrees) and then temporarily stops at a crank angle of approximately 270 degrees, where the gripper 48, friction roller 43, etc. are restarted, and then the machine is automatically restarted to enter steady operation.

According to this usage method, in addition to the effects of the first usage method described above, the weft thread is inserted in advance prior to normal operation, and when restarted, the weft end is cut by the cutter used during normal operation. The length of the weft thread protruding from the main air jet nozzle 49 becomes appropriate, and there is also the effect that troubles at restarting can be reduced.

In the above description, an example of repairing a weft yarn that has been inserted incorrectly has been explained, but the present invention can also be applied when the air jet loom is stopped due to warp yarn breakage, selvage yarn breakage, or manual operation. An example thereof is shown in FIG. In this case, up to the reverse rotation *m is the same as the first usage method shown in FIG. Next, so that the broken warp threads can be tied,
The machine table is reversed approximately 390 degrees at the crank angle to the closed state (crank angle approximately 270 degrees) immediately before the weft insertion W1F state.

In this state, the warp threads are tied, the switch is turned on, and startup preparation and restart are performed in the same manner as in the first usage method. In addition, in the reversal preparation state, the warp threads are almost closed, so the threads are tied without performing the reversal for warp tying as described above, and then the weft insertion is stopped and the warp threads are reversed 1 to the closed state immediately before the state.
Next, preparation for startup and restart may be performed sequentially.

Furthermore, when inserting 1 shot 1-$11 when repairing a warp break, the weft insertion is reversed to the closed state (crank angle of approximately 270 degrees) immediately before the weft insertion state, and from the thread knotted state, the crank angle is approximately 270 degrees. After the machine is rotated 270 degrees in the normal direction to bring the weft that has been blocked into the open state into which it should have been inserted, the same procedure as the one-shot weft insertion of the second usage method shown in FIG. 5 is carried out. In addition, if you tie the thread before reversing,
After tying the yarn, the crank angle is further reversed by about 120 degrees to bring the weft that was blocked into the open state into which it should have been inserted, and then the one-shot weft insertion of the second usage method shown in Fig. 4 is carried out. Follow the same procedure.

In the first embodiment described above, the guide plate 63 is fixed to the tip of the suction nozzle 61, and the guide plate 63 moves together with the suction nozzle 61.

However, as shown in FIG. 6 or 7, the guide plate 61
may be formed separately from the suction nozzle 61 to reduce the weight of the suction nozzle 61 and improve its mobility. In the second embodiment shown in FIG. 6, a guide plate 67 is fixed to the tip of a piston 68a of an air cylinder 68 which is disposed opposite to the suction nozzle 61 across the weft path from the main air jet nozzle 49. When the piston 68a of the air cylinder 8 is advanced, the guide plate 67 crosses the weft path, directing the weft jetted from the main air jet nozzle 49 toward the suction nozzle 61 as shown by the chain line.
The suction nozzle 91 sucks the weft yarn and prevents it from being inserted.

When the piston 68a of the air cylinder 68 is moved backward, the guide plate 67 is moved away from the weft path, and the weft is inserted without being hindered by the guide plate 67. Although the suction nozzle 61 may be fixedly installed, it may be movable back and forth by a vertically movable member such as an air cylinder 62 as shown in the figure, or it may be rotatable (not shown) to remove the weft yarn. This is more preferable because it can move forward to the vicinity of the weft path to reliably suck the weft yarn, and at the same time can sufficiently retreat from the weft path so as not to interfere with the insertion of the weft yarn.

In the third embodiment shown in FIG. 7, a guide plate 67 is rotatably supported around the bottle, and a piston 68a of an air cylinder 8 is connected to the guide plate 67, so that the piston 68a of the air cylinder 68 can be moved up and down. The guide plate 67 is rotated.

In the embodiments described above, the rigid guide plate was movable between a position intersecting the weft path 11 and a position away from the weft path. However, the eleventh means of the present invention can also be - in addition to the above-mentioned guide plate, a compressed air jet nozzle 69 as shown in FIG. In FIG. 8, the compressed air injection nozzle 69 is aligned with the suction nozzle 61 along the axis of the suction nozzle 61 and is positioned opposite to the suction nozzle 61 across the weft path. When compressed air is injected by the switching valve 70, the weft yarn in the weft path is pushed into the suction nozzle 61 on the opposite side and is sucked into the suction nozzle 61, thereby preventing cotton insertion.

Note that the suction nozzle described above generates suction force by the ejector action of compressed air. However, the suction nozzle of the present invention is not limited to one using ejector action, and for example, a suction nozzle connected to a suction source to generate suction force may be adopted.

As described above, in the present invention, the suction nozzle is installed so that the suction port tip of the suction nozzle can be located near the weft path. It is possible to reliably prevent weft insertion at such times. Furthermore, the lock of the present invention has an extremely simple structure, is easy to manufacture, and is reliable in operation.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an outline of the drive system of an air jet room according to the present invention, FIG. 2 is a schematic plan view of a first embodiment of the present invention, and FIG. 3 is a flowchart of the first method of use of the present invention.
FIG. 4 is a flowchart of the second usage method of the present invention, and FIG.
The figure is a flowchart of the third usage method of the present invention, Figure 6 is a plan view of the second embodiment of the present invention, Figure 7a is a plan view of the third embodiment of the present invention, and Figure 7b is the same as that of Figure 7a. The front view and FIG. 8 are plan views of a fourth embodiment of the present invention. DESCRIPTION OF SYMBOLS 11... Drive motor, 15... Crankshaft, 24... Heald frame, 25... Reed, 2
6... Weft insertion guide, 43... Feed roller, 44... Weft, 46... Pool pipe, 48... Gripper, 50... Measuring drum, 49... Main air jet nozzle ,51.52
...Detector, 61...Suction nozzle, 6
2... Reciprocating member, 63.67... Guide plate,
69...Compressed air injection nozzle. Patent Applicant Co., Ltd. φta Automatic Loom Manufacturing Co., Ltd. Patent Application Agent Eiji Sanaka Figure 8 Procedure Amendment Writing Method) % Formula %) 2. Name of Invention Jet Loom Weft Insertion Prevention Device 3, Person Making Amendment Relationship to the case Patent applicant name (321) Toyota Industries Corporation 4, agent address 601 Nikko Palace Akihabara 110, Taito 2-3-7, Taito-ku, Tokyo Telephone (835) 8231-2 Figures
Aspect 6: Contents of amendment: Engraving of the drawing (no change in content)

Claims (1)

[Scope of Claims] 1. In a jet loom weft insertion device that inserts weft yarns into a shed formed between upper and lower warp yarns using pressure fluid jetted from a jet nozzle, the suction nozzle is inserted so that its tip is in the weft path. A weft insertion prevention device for a jet loom, characterized in that it is installed so that it can be located nearby. 2. The cotton insertion prevention device according to claim 1, wherein the tip of the suction port of the suction nozzle can be located near the weft path between the jet nozzle and the jet nozzle side selvedge yarn. 3. The weft insertion prevention device according to claim 1 or 2, further comprising means for guiding the weft running along the weft path to the suction nozzle. 4. The weft insertion prevention device according to claim 3, wherein the guiding means is a guiding root, and the guiding root is located at a position deviated from the weft path and at a position 1q on the weft light path. 5. The weft insertion prevention device according to claim 4, wherein the suction nozzle is movable forward and backward with respect to the weft path, and the guide plate is fixed to the tip of the suction nozzle. 6. The guide plate is movably arranged at a position facing the suction nozzle, and the guide plate moves away from the suction nozzle to a position sandwiching the weft path between the guide plate and the suction nozzle, and at a position approaching the suction nozzle. The weft insertion prevention device according to claim 4, which takes a position intersecting the weft path and guiding the weft to the suction nozzle. 7. The weft inserting and closing device according to claim 3, wherein the guiding means is a compressed air injection nozzle, and the injection nozzle is arranged opposite to the suction nozzle across the weft path. 8. The weft insertion prevention device according to claim 6 or 7, wherein the suction nozzle takes a position close to the weft path and a position away from the weft path. 9. The weft insertion prevention device according to claim 5 or 8, wherein the suction pipe connected to the suction nozzle and transporting the suction air and the suction weft has a bellows-type expansion joint structure.