JPH086231B2 - Weft removal method for fluid jet loom - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a weft removing method in a fluid jet loom, and more specifically, when weft is ejected from a fluid jet nozzle arranged on the weft insertion side. When a weft insertion error occurs, the miss yarn related to this weft insertion error is beaten, and then the loom is stopped with this being connected to the fluid jet nozzle, and then the loom is reversed to expose the miss yarn to the cloth fell. The present invention relates to a method of pulling and removing the exposed miss yarn.

[Technical background of the invention]

Conventionally, as a weft removing method of this type, for example, JP-A-59-
There is one disclosed in Japanese Patent No. 228047. This technology was carried out on an air jet loom, and Fig. 16 shows an outline of the loom.

In the figure, 1 is a reed, 2 is a sley that holds this reed, 3 is a weft insertion side (left side in the drawing) of this sley, and a fluid injection nozzle fixed to the sley, 4 is a side frame of a loom 5
The yarn brake 4 is fixed to the yarn brake, 4a is a normally closed gripper of the yarn brake, 6 is a yarn supplying device, and the yarn supplying device 6 includes a weft package, a tensor, a weft storing device, and the like, and the weft W from the device 6 is normally provided. The fluid jet nozzle 3 is drawn through the closed gripper 4a.

As described above, in the normal configuration of the loom, when the reed 1 approaches the retreat limit and the opening angle of the warp Y increases, air is pre-injected from the fluid injection nozzle 3, and when the weft insertion timing comes next, the normally closed gripper 4a opens. As a result, one pick of weft yarn W stored in the yarn feeder 6 is ejected from the fluid ejection nozzle 3 and flies to the opposite weft insertion side. At this point, weft insertion is completed, and the weft feeler 7 detects the presence of a weft on the side opposite to this weft insertion. Then, the weft yarn inserted into the weft is driven into the cloth fell CF by the subsequent forward movement of the reed 1, and the weft yarn connected to the fluid jet nozzle 3 is cut by the cutter 8 immediately after the reed beating. From this process, the relationship between the upper yarn and the lower yarn of the warp Y is reversed to form the next opening.

Further, in the loom, 4b is a normally open gripper attached to the yarn brake 4, 9 is a suction device, 8a is a cutter restraint device linked to the cutter 8, 10 is a miss yarn cutter, and 11 is a miss yarn separating device. Thus, these constitute a weft removing device.

If a weft insertion error occurs because the weft yarn is being cut in the course of weft insertion or caught on the warp Y row, the weft feeler 7 detects the absence of the weft yarn and detects a weft insertion error signal. Based on this signal, the control unit of the loom issues an operation command to cause the corresponding device to perform the next operation.

That is, the stop control device sets a predetermined stop position on the reed 1 to stop the loom when the reed reaches the retreat limit, and at the same time, the cutter restraint device 8a operates to restrain the cutting motion of the cutter 8. . Therefore, the miss yarn M is connected to the fluid ejection nozzle 3 without being cut even though it is beaten in the stopping process. On the other hand, the normally open gripper 4b is closed to sandwich the weft yarn W, and the suction device 9 is operated to suck the above-mentioned miss yarns M. Thereafter, the miss yarn cutter 10 cuts the miss yarn between the suction device 9 and the fluid ejection nozzle 3. Next, the miss yarn M is exposed to the cloth fell CF by reversing the loom almost once, and the miss yarn separating device 11 is operated here. The device 11 peels off the mistake by sending out the belt 11a and causing the claw 11b attached to the tip thereof to be interrupted between the mistaken thread M and the woven cloth C.
Are sequentially sucked into the suction device 9 and removed. When the belt 11a is pulled in again, the loom is automatically restarted.

However, when the weft yarn is removed by such a conventional method, there is a problem that warp cutting occurs. The cause is as follows.

That is, although the miss yarn is exposed as described above, since the miss yarn has already been beaten, the miss yarn is entangled with the warp row and firmly engaged with each warp yarn. Therefore, even if such a miss yarn is simply pulled to the weft inserting side, the engaging force at each engaging portion is accumulated and resists, so that this cannot be easily pulled out. Therefore, the miss yarn separating device 11 is required, but since the claw 11b of the device has to be advanced to a narrow area at the top of the warp opening, this often catches the warp yarn, and depending on the yarn type. Is where the cutoff occurs.

To solve the above problems, the applicant previously proposed the following method (Japanese Patent Application No. 60-141570). That is, this proposal is to hold the miss yarn in a U-shape between the miss yarn and the fluid jet nozzle by injecting the weft yarn to the side opposite to the weft insertion side while exposing the miss yarn to the cloth fell as described above. However, the held weft is pulled from the side opposite to the weft inserting side.

The above method is mainly proposed for an open type weft insertion device, and the exposed miss yarn is reversed from the weft insertion side to the non-weft insertion side and is pulled from this anti-weft insertion side. Therefore, the entangled portions are peeled off one by one, so that the removing operation can be easily performed without providing the miss yarn separating device.

Note that FIG. 15 schematically shows the open type weft insertion device. In FIG. 15, 1 and 2 are the reed and sley, respectively, 1a is the reed wing of the reed 1, and the reed 1a is on the cloth fell CF side. The air guide groove 12 is formed by the row of the formed recesses 1b.
Reference numeral 13 denotes auxiliary nozzles arranged at an appropriate pitch in the sley 2, which are ejected from the fluid ejecting nozzle 3 by successively ejecting air from these auxiliary nozzles toward the air guide groove 12 in the oblique inversion direction. While capturing the weft in the air guide groove 12, the front end of the weft is successively blown toward the opposite weft insertion side. The auxiliary nozzle 13 escapes downward from the lower thread row of the warp Y as shown by the chain double-dashed line in the beating process.

〔problem〕

By the way, there is a problem that the weft removing device according to the above proposal cannot be applied to a closed type weft inserting device. The reason will be described below.

FIG. 14 schematically shows the closed type weft insertion device. In the figure, 21 is a reed, 21a is its reed, and 2
Reference numeral 2 is a sley that fixes the reeds 21, and 23 is an air guider that is arranged on the woven fabric CF side of the reeds 21 and fixed to the sley 22 in a comb-like shape. The air guide 23 has a guide hole 23a and a slit-like weft escape path 23b formed in the upper part of the guide hole, and the guide hole 2a
The row 3a constitutes the air guide path 24. Then, while guiding the air jet ejected from the fluid ejecting nozzle 3 together with the weft to the side opposite to the weft insertion side by the air guide passage 24, the weft is placed on the guide air stream and the weft is inserted. As shown by the chain double-dashed line, the air guide 23 deviates to the lower side of the warp Y-row in the beating process. At this time, the weft-inserted weft is supported by the lower-thread warp Y'of the warp and is guided from the weft escape passage 23b. Escape outside the child 23. This closed type weft insertion device has an advantage that it consumes less air and can also insert a yarn having low tensile strength.

Now, as is clear from the above description, in the closed type, since the weft threads are weft-inserted into the air guide path 24 whose periphery is closed, the weft threads are connected to the miss weft insertion side in series with the miss thread. The injected weft yarn is also in the air guide and is retained in a U-shape. Therefore, even if the weft yarn is pulled from the side opposite to the weft insertion side, the miss yarn cannot be pulled out. In addition, even in the open type, when the weft thread that is connected to the miss thread is ejected toward the opposite weft insertion side, the injected weft thread rarely sticks to the auxiliary nozzle. You will not be able to pull out the miss thread.

Therefore, an object of the present invention is to enable the method according to the above-mentioned proposal to be applied to a weft insertion device such as a closed type, and also to remove a miss yarn more reliably in a weft insertion device such as an open type. is there.

[Means for Invention]

In the method of the present invention which has solved the above-mentioned problems, the miss yarn is exposed to the cloth fell as described above, and then the weft yarn is ejected toward the anti-weft insertion side, and the reed is operated back and forth, and the ejection is performed in this state. It pulls the weft.

[Action]

According to the above-mentioned method, in the closed type, the weft yarns which have been connected to the miss yarns and have been ejected to the side opposite to the weft insertion side are retained in the air guiding path in the U-shape as described above. Also, due to the back-and-forth movement of the reed, this retained weft is supported by the bobbin thread of the warp as described above and escapes from the weft escape path. Even when the injected weft thread hits the auxiliary nozzle when it is ejected toward the reverse weft insertion side, the auxiliary nozzle escapes from the lower thread row of the warp due to the reciprocating movement of the reed,
The miss yarn is more reliably removed by being supported by the lower yarn row of the warp yarns and freely released from the auxiliary nozzle.

〔Example〕

FIG. 1 is an explanatory view of an apparatus used in one embodiment of the present invention.
In the figure, 21, 22, 23 and 24 are the reed, sley, air guide and air guide passage shown in FIG. 14, respectively, and 3 is the fluid injection nozzles 5 and 6 fixed to the weft insertion side of the sley 22. Are the side frame of the loom and the weft yarn feeder, respectively (see FIG. 16). Further, 15 is a pressure air supply source, 16 is a control panel, 16a, 16b and 16c are start preparation switches, start switch and stop switch of the control panel, respectively, and 17 is a control section of the loom.

40 is the drive system of the loom. In this drive system,
41 is a main motor for driving the loom, 42 is a main shaft driven from the main motor through belt transmission means 43, 44 is an electromagnetic brake connected to this main shaft, and the main shaft 42 is a warp system, a reed.
In addition to driving the weft system of 21 etc., it also drives the main motion elements of the loom via the intermediate shaft etc. according to each timing schedule. An angle sensor 45 detects the rotational phase angle (crank angle) of the main shaft 42, for example, every 1 ° and sends an angle signal. This crank angle is usually calculated with the most advanced position (beating position) of the reed 21 as 0 ° (= 360 °), and therefore the last retreat position of the reed (the maximum opening position of the warp) is almost
It becomes 180 °. 46 is a driven shaft that is driven from the main shaft 42 through the belt transmission means 47, 48 is a driven shaft that is driven from this driven shaft through a one-position clutch 50 that is always connected, and 49 is a belt transmission from this driven shaft. The rotation speed ratio between the shafts 46, 48 and 49 and the main shaft 42 is 1: 1. In the one-position clutch 50, 51 is the driven shaft 48
Clutch head 52 fixed to the driven shaft 46 is a slide head urged toward the clutch head 51, and when the slide head is slidably driven by the above-mentioned urging force, the starting position of the loom, For example, when the crank angle is 300 °, the clutch head 51 is engaged and the clutch 50
To "conclude". An air actuator 53 is connected to the pressurized air supply source 15 via a normally closed solenoid valve 54, and when the valve is opened, the slide head 52 is driven to the opposite side of the clutch head 51 to “disconnect” the clutch 50. To do. 55 is the above-mentioned crank angle 300 for the clutch head 51
A position sensor 56 for detecting the phase of °, a clutch “disengagement” sensor, and a clutch “engagement” sensor 57.

In the system of the fluid injection nozzle 3, 31 is an injection control valve, which is a solenoid valve 32, an air tank 33 and a pressure regulating valve 34.
Is connected to the compressed air supply source 15 via the intermediate shaft 49 and is driven to open / close from the intermediate shaft 49 via cam means.

In the yarn feeder 6, 61 is a package of weft W,
62 is a weft thread tensor, 63 is a tensor pipe, 64 is a tensor valve, and this tensor valve is connected to the pressurized air supply source 15 via a solenoid valve 65 and a check valve 66. Further, in the yarn feeding device 6, 70 is a weft yarn storage device, and in this example, a drum type device as disclosed in Japanese Patent Publication No. 59-32577 is used. That is, 71 is a hollow spindle arranged in the left-right direction of the loom (as described above, the left side is the weft insertion side), and this spindle is supported by a bearing 72 and, for example, increases speed from the driven shaft 48 via belt transmission means 73 and 74. It is driven at a rotation speed of 1: 4. Reference numeral 75 denotes a drum supported by a bearing on the right end of the spindle, and magnetic force is applied to the drum to prevent the drum from rotating around the spindle 71. Reference numeral 76 denotes a winding arm made of a tubular body fixed to the spindle 71. The weft W from the weft tensioner 62 is drawn from the inner hole of the spindle 71 to the winding arm 76 and guided to the outside of the left end portion of the drum 75. 77 and 78
Is a right locking pin and a left locking pin which are reciprocally driven from the driven shaft 48 at a timing described later, respectively, which are moved forward to be engaged with the drum 75, and returned to be separated from the drum. 79 is a yarn guide arranged concentrically with the drum 75.

Reference numeral 80 denotes an auxiliary motor for separately driving the weft yarn storage device 70, which is driven by a gear ring 81 and an electromagnetic clutch 82.
When the electromagnetic clutch 82 is energized, it is connected to the driven shaft 48.

Reference numeral 90 denotes a thread brake fixed to the side frame 5, the details of which are shown in FIGS. 2 and 3. In these figures, 91 is a well-known two-step grip type weft gripper, 92 and 93 are thread guides arranged on the left and right sides of the gripper, and the gripper 91 synchronizes with the intermediate shaft 49 and wefts described later. Performs gripping and braking.

95 is another braking means of the thread brake 90. The means
In 95, 96 is a bracket standing on the side frame 5, 97 is a thread guide fixed to the bracket, and this thread guide is arranged on the right side of the thread guide 93 and is a long hole 98 facing the front-rear direction of the loom.
Provide. Reference numeral 99 denotes an arm arranged between the thread guides 93 and 97, which is swingably supported by the fixed shaft 100, and is connected to the intermediate shaft 49.
By the cam means 101 which works in synchronism with the above, the tip of the arm moves from below to above the yarn guide 97 during the latter half of weft insertion.
It is driven as shown by the dashed line.

Returning to FIG. 1, 105 is a photoelectric type weft yarn detector, which emits a weft yarn "existing" signal when the weft yarn escapes from the weft yarn escape path of the air guider 23a on the most reverse weft insertion side as described above.

Reference numeral 110 denotes a weft pulling device which is further fixed to the sley 22 on the side opposite to the weft insertion side of the air guide 23a, and details thereof are shown in FIG. In the figure, 111 is a body, 112 is the same row as the row of air guide holes of the air guide 23 (the air guide path 24), and the body 11
The weft introduction hole formed in 1, 113 is an air ejection hole opened on one side of the weft introduction hole, and 114 is a weft ejection hole facing the air ejection hole, as shown in FIG. The air ejection hole 113 is connected to the solenoid valve 115 and the check valve 116.
Is connected to the compressed air supply source 15 via a line, and the weft yarn outlet hole 114 communicates with a yarn waste collecting basket 118 via a pipe line 117.

With the above structure, the weft insertion system is completed, and the weft W guided from the winding arm 76 of the weft storage device 70 to the outside of the drum 75 is wound around the drum a predetermined number of times as described above, and the yarn guide 79, Same 92, gripper 91, long hole 98 of thread guide 97 (Fig. 3)
Through the fluid ejecting nozzle 3. The operation of the weft insertion system will be described based on the timing chart of FIG.

First, when the start preparation switch 16a of the operation panel 16 is closed, (A) the solenoid valve 65 of the weft tensioner 62 system is opened. This allows the tensioner valve 64 to the tensioner pipe 63.
Air is sprayed into the weft yarn storage device 70 to appropriately apply tension to the weft yarn.

(B) The solenoid valve 32 of the fluid injection nozzle 3 system is opened, and pressurized air is sent to the injection control valve 31.

(C) The solenoid valve 115 of the weft pulling device 110 system is opened so that air is jetted from the air jet hole 113 (FIG. 6), and the jet flow passes from the weft lead-out hole 114 through the pipe line 117 and the yarn waste. Guided to the collection basket 118.

The above states (A) and (B) continue until the stop switch 16c is operated. Further, the one-position clutch 50 is “engaged” and the electromagnetic clutch 82 of the auxiliary motor 80 system is “disengaged”. When the start switch 16b is operated in this manner, the electromagnetic brake 44 is opened and the main motor 41 is started at the same time.

The weft insertion period of the loom is 120 ° to 275 crank angle.
Assuming that the gripper 91 is set to 0 °, this weft insertion period can be seen as the opening period of the gripper 91 in FIG.

For convenience, the weft insertion operation will be described with reference to the beating time (0 °). When the retreat stroke of the reed 21 (0 ° to about 180 °) approaches the weft insertion start time (100 °), the injection control valve 31 "Open"
Then, air injection is started from the fluid injection nozzle 3, and immediately thereafter (115 °), the right locking pin 77 is disengaged from the drum 75. Then, when the beginning of weft insertion (120 ° above) comes, the gripper 9
Since 1 releases the grip and releases the weft, the weft is ejected to the air guide path 24 and flies. During this flight (about 180 °), the arm 99 (FIGS. 2 and 3) of the braking means 95 is driven to above the thread guide 97 as described above. Therefore, the weft is bent between the yarn guide and the yarn guide 93, and an appropriate braking force is applied here. Therefore, when the weft extends straight and continues to fly, and the tip end thereof is introduced into the weft introduction hole 112 (FIG. 6) of the weft pulling device 110, the weft insertion ends here. That is, at the end of weft insertion (275 ° above), the gripper 91 strongly grips and brakes the weft, and at the same time, the leading end of the weft is blown into the jet from the air jet hole 113 (Fig. 6). And is bent, and this is introduced into the weft lead-out hole 114 and anchored. Immediately thereafter (280 °), the right locking pin 77 engages with the drum 75, and at the same time, the arm of the braking means 95 returns to the old position. Then, the weft is locked on the drum 75 by the above engagement of the right locking pin, and then (300
°) The left locking pin 78 is disengaged from the drum 75. As a result, the weft thread wound around and behind the pin 78 moves to the right locking pin 77 side, and when the length of those winding figures reaches one pick (350 °), the left engagement Stop pin 78 engages the drum again. On the other hand, the gripper 91 immediately grips the weft as described above and brakes it immediately after the beating (10 °).
Hold this weakly. Therefore, the weft yarn is pulled out from the yarn brake 90 as the reed 21 moves forward while an appropriate tension is applied, thereby preventing the cutting.

Further, in FIG. 1, reference numeral 120 denotes a weft return preventing means arranged next to the braking means 95. The means 120 retains the beating weft yarn cut near the cloth fell CF after being cut as will be described later, and details thereof are shown in FIGS. 4 and 2.

In these figures, 121 is an arm swingably supported on the fixed shaft 100, 122 is a hook fixed downward to the tip of this arm, and this hook is located slightly behind the cloth fell CF and opens rearward. are doing. The arm 121 is the intermediate shaft 49.
By the cam means 123 which moves in synchronization with (FIG. 1),
As shown in Fig. 1, after the beating (15 °),
) Is rotated upward. Reference numeral 124 is a bracket standing on the side frame 5, 125 is a locking piece fixed to this bracket, and the locking piece 125 has a V-shape with its upper portion expanding rearward, and both sides of this V-shape. Through window 12
6 has been opened. When the arm 121 is driven upward as described above, the hook 122 is moved through the window 1 as shown in FIG.
Invades 26.

Reference numeral 130 denotes a rotation preventing means for preventing the above-mentioned rotation operation, the details of which are shown in FIG. In the figure, 131
Is the base and 132 is the pin fixed to this base.
Is disposed directly below the arm 121 and is parallel to the arm 121. 133 is a stop lever whose intermediate portion is supported by a pin 132, 135 is a reciprocating electromagnetic actuator, 136
Is the plunger of this actuator, 137 is the compression spring 138
The plunger that is urged in the protruding direction by the
136 and the protrusion 137 face each other with the lower end portion of the stop lever 133 interposed therebetween. The plunger 136 is always retracted to the position shown by the chain double-dashed line, so that the protrusion 137 pushes the stop lever 133 toward the plunger side to retract the upper end of the lever from below the arm 121. When the electromagnetic actuator 135 is energized, the plunger 136 causes the compression spring 13
The stop lever 133 is rotated by projecting against the biasing force of 8. As a result, the lever 133 becomes the posture shown by the solid line,
The upper end faces the lower part of the arm 121 and prevents the arm from moving downward.

Reference numeral 140 in FIG. 1 is a weft cutter. The cutter 140 scissors the repulsed weft thread and separates it from the fluid jet nozzle 3. An example thereof is shown in FIG.

In the figure, 141 is a bracket fixed near the cloth fell CF, 142 is a fixed blade fixed to this bracket, and 143 is a fixed blade.
Is a movable blade, and these blades form a scissor opening 144 on the side of the weft insertion slot of the cloth fell CF. The movable blade 143 is supported by the bracket 141 via a shaft 145 that fixes the movable blade 143. Reference numeral 146 denotes a drive lever fixed to the shaft 145. By pulling a free end portion of the drive lever with a tension spring 147, a closing motion is given to the movable blade 143, and a cam synchronized with the intermediate shaft 49 (FIG. 1). 148 and the cam follower 149 provided on the drive lever
The opening movement is given to 143.

A thread leader 150 is fixed to the bracket 141 by a thread leader and extends rearward to form a recess 151 on the lateral upper surface of the cloth fell CF, and behind the recess, a gently curved lead surface 15 is formed.
Provide 2 Therefore, the weft yarn from the yarn brake 90 (FIG. 1) to the fluid jet nozzle 3 is guided forward by the lead surface 152 and is advanced to be beaten and simultaneously dropped into the recess 151 and locked. This prevents a cutting error due to the cutter.

Reference numeral 155 denotes a nozzle arranged in the vicinity of the recess 151, which is directed upward from the lower side of the recess. Nozzle 155 is a source of pressurized air via solenoid valve 156 and check valve 157.
Connected to 15. Therefore, when air is jetted from the nozzle, the weft yarn locked in the recess 151 is blown and separated from the recess.

Further, 160 is a cut-off preventing means, the structure of which is the same as that shown in FIG. Therefore, reference numeral 165 is attached to the electromagnetic actuator (135) in the figure, and only the distinction is made, and the duplicated description will be omitted. When the electromagnetic actuator 165 is operated, the upper end of the stop lever 133 advances from the retracted position to the lower position of the drive lever 146 to prevent the closing movement of the movable blade 143.

Reference numeral 170 in FIG. 1 denotes a weft suction device arranged at the subsequent stage of the fluid jet nozzle 3, the details of which are shown in FIGS. 8 and 9. In these figures, 171 is a flat body fixed to the reed 21, 172 is a weft insertion hole that penetrates the body to the left and right, and this insertion hole is the air guide passage 24 formed by the guide hole of the air guide 23. They are arranged in the same row. Reference numeral 173 is an inlet connector, 174 is an air feed passage having one end connected to the connector 173, and 175 is a nozzle formed by narrowing the other end of the air feed passage to a flat shape and opening on the side surface of the weft insertion hole 172. ing. Reference numeral 176 is an air discharge passage opened opposite to this opening. Then connect the inlet connector 173 to the solenoid valve 1
Pressure air supply 15 via 77 and check valve 178
(FIG. 1), and an air discharge passage 176 is guided to the yarn waste collecting basket 118 by a pipe passage 179.

Reference numeral 180 in FIG. 1 is a miss thread cutter, one example of which is the tenth thread cutter.
Shown in the figure. In the figure, 181 is a bracket fixed to a temple bar (not shown) of a loom, and 182 is an air actuator fixed to this bracket. In this air actuator, when pressurized air is fed from the front air connector 183, a piston rod 184 moves forward and advances, and a return spring of the rod 184 is controlled by a built-in spring. And the above-mentioned reciprocating stroke is ensured enough to carry out the operation described later. 185 is an L-shaped cutter base, one side portion 185a of the L-shape is fixed to the piston rod 184, and a fixed blade 186 is attached to the other side portion 185b. 187 is a movable blade which is pin-coupled to the fixed blade 186 by using a pin 188 and has a drive arm 189. Reference numeral 190 denotes a drive rod arranged in parallel with the piston rod 184, the rear portion of which penetrates the bracket 181 and one side portion 185a of the cutter base, and the drive arm 189 is pin-connected to the rear end portion thereof. Reference numeral 191 is a compression spring interposed between the drive arm 189 and one side portion 185a of the cutter base.
The set length of the compression spring 191 is adjusted by fixing the collar 192 fitted to 0 at an appropriate position, thereby forming the scissor opening 193 between the fixed blade 186 and the movable blade 187. 194 is a stopper fixed to the tail of the drive rod 190.

In the above structure, when the piston rod 184 is advanced from the backward movement limit (shown by the solid line), the stopper 194 comes into contact with the bracket 181 (194 ') to prevent the drive rod 190 from further moving. When the piston rod 184 is further advanced in this state, the drive arm 189 is rotated to drive the movable blade 187 toward the closing direction, and the scissors cutting action is performed near the forward movement limit as shown by the chain double-dashed line. . The fluid ejection nozzle 3 when the reed 21 is in the final retracted position (about 180 °)
Between the weft suction device 170 and the weft suction device 170.
Is set to a portion that does not interfere with the reed when it is at the most advanced position.

The air actuator 182 is connected to the compressed air supply limit 15 via a solenoid valve 195 and a check valve 196.

Reference numeral 200 in FIG. 1 denotes a restart weft cutter, which is provided adjacent to the weft cutter 140. Reference numeral 201 denotes an electromagnetic actuator that controls the scissor cutting movement of the cutter.

A weft removing method using the above apparatus will be described with reference to FIGS. 12, 13 and 11. The operations of the solenoid valves, the electromagnetic actuators, the loom drive system, and the like described above are executed based on commands issued from the sequence controller of the controller 17. In addition, when executing the above, the angle sensor 45, the position sensor 55, the clutch "disengaged"
Also, various confirmation operations involving the signals from the “connection” sensors 56 and 57 and the like are involved, but the description thereof is omitted to avoid complication.

(1) When a weft insertion error occurs in the weft insertion process, the weft detector 105 outputs a weft insertion error signal "absence", and the control unit 17 inputs this signal and outputs a stop command. .

(2-1) Based on the stop command, the stop control device of the control unit 17 operates in the next weaving cycle 18 in which the weft insertion error has occurred.
A stop angle is established at 0 °, (2-2) the circuit of the main motor 41 is turned "OFF", and the electromagnetic brake 44 is energized (2-3) The main motor 41 is stopped at that angle.
As described above, the warp opening angle is maximized at this stop position.

(3-1) On the other hand, the control unit 17 issues an operation signal based on the weft insertion error signal to perform the following various operations.

(3-2) Fluid ejection nozzle 3 system and weft pulling device 11
The 0 system solenoid valves 32 and 115 are closed.

"Energize" electromagnetic actuator 165 of weft cutter 140 series
To prevent the weft from cutting.

The solenoid valve 156 of the weft cutter 140 system is opened, and the electromagnetic actuator 135 of the return blocking means 120 system is energized. As a result, air is jetted from the nozzle 155 of the weft cutter to release the weft from the recess 151 (Fig. 7), and the hook 122 (Fig. 4) is not locked.

13A is the above (1), (2-1 to 3), (3-).
The case where the various operations of 1 and 2) are completed is shown, and the miss yarn M is connected to the fluid ejection nozzle 3 without being cut and locked while being woven in the cloth fell CF. And as can be seen from FIG. 11, in this stop position, the injection control valve 31 is opened,
Further, since the right locking pin 77 is "disengaged", the pressure air retained between the valve 31 and the solenoid valve 32 is temporarily ejected from the fluid ejection nozzle 3, and the jet flow thereof causes the drum to be ejected.
A part of the weft yarn stored in 75 is ejected in a U-shape into the air guide passage 24.

(4) Open the solenoid valve 54 of the one-position clutch 50 system. This allows the air actuator
53 operates and the clutch 50 is disengaged.

(5) The solenoid valve 177 of the weft suction device 170 system is opened for a predetermined time. The extra weft yarns ejected in the U-shape by this opening operation are removed by the air discharge passage 176 (see FIGS. 8 and 9).
(Fig.) Is removed by suction. (B in FIG. 13) (6) The electromagnetic brake 44 is “deactivated” and the main motor 41
The reverse rotation circuit of is turned "ON" to reverse the main shaft 42 once and stop it here. That is, since this stop angle is 180 ° immediately before the weft insertion error occurs, the miss yarn M is exposed on the cloth fell. (C in FIG. 13) (7) The electromagnetic clutch 82 of the yarn feeding device 6 system is set to “contact”,
The circuit of the auxiliary motor 80 is turned "ON" to rotate the motor 80 a predetermined number of times.

Therefore, only the weft yarn storage device 70 is driven to wind the weft yarn on the drum 75. The auxiliary motor 80 is stopped when the winding length corresponds to approximately two picks in the weft insertion and the right locking pin 77 is "disengaged". (D in FIG. 13) (8) The solenoid valves 32 and 115 of the fluid ejection nozzle 3 system and the weft traction device 110 system are respectively opened for a predetermined time.

As a result, the two picked weft yarns are ejected into the air guide passage 24, and the weft yarns are reversed on the opposite weft insertion side and reciprocate once. Then, the weft pulling device 110 sucks the reversal portion into the weft lead-out port 114 (Fig. 6) (E in Fig. 13).

(9) Main motor 41 reverse rotation circuit is set to "ON"
42 is reversed to, for example, 300 °. In this process, the weft inserted in the U shape escapes from the weft escape passage 23b into the warp shed as described with reference to FIG. (F in FIG. 13) (10) The main motor 41 is rotated in the normal direction to return the main shaft 42 to the initial stop angle of 180 °. Here, the miss thread M is exposed again.

(11) The solenoid valve 177 of the weft pulling device 110 system is opened. As a result, the escaped weft yarn is pulled from the side opposite to the weft insertion side while maintaining a U-shape, so that the re-exposed miss yarn M is peeled from the woven fabric and removed (G in FIG. 13). .

(12) Open the solenoid valve 195 of the miss thread cutter 180 system. Therefore, as described with reference to FIG. 10, the air actuator 182 moves forward to separate the weft yarn from the fluid ejection nozzle 3 (H in FIG. 13). Then, the separated weft yarn passes through the conduit 117 together with the miss yarn M and the yarn waste collecting basket 1
Collected at 18.

(13) Set the main motor 41 reverse rotation circuit to “ON” to make the spindle
42 is reversely driven to the weaving cycle 300 ° position where the weft insertion error occurs, and stopped at this point. This 300 ° is the starting angle of the loom as described above. (I in FIG. 13) (14) The circuit of the auxiliary motor 80 is turned “ON”, and the solenoid valve 177 of the weft suction device 170 system is turned “open”. As a result, the weft is wound around the drum 75, and every time the right locking pin 77 is released, the weft is wound by the weft suction device 17
It is sucked to 0 and removed. In this process, the position sensor 55 also outputs the angle signal of 300 °.

(15) The control unit 17 sets the solenoid valve 54 of the one-position clutch 50 system to “close” when the angle signal (300 °) is emitted and disappears.
Shut off air supply to 53. Therefore, the slide head 52 of the clutch 50 is moved to the clutch head 51 by the biasing force.
Is pressed against. In this state, the head 51 rotates about 1 revolution 30
When the phase becomes 0 °, the one-position clutch 50 is engaged, and at the same time, a signal is issued from the clutch “engagement” sensor 57.

(16) The circuit of the auxiliary motor 80 is turned off and the electromagnetic clutch 82 of the motor is turned off based on the above-mentioned clutch "connection" signal. That is, the yarn feeding device 6 is also ready to restart. And the weft is the weft suction device 170
And the tension between the device and the fluid jet nozzle 3 (J in FIG. 13) (17) The following operation command is issued to prepare for restarting the loom.

(17-1) The solenoid valve 195 is closed to retract the miss thread cutter 180.

(17-2) Injection control valve with solenoid valve 32 open
Deliver pressurized air up to 31.

(17-3) The electromagnetic actuator 165 is deenergized to release the constraint of the weft cutter 140. At the same time solenoid valve 156
Is closed to enable the weft thread to be locked by the cutter.

(17-4) The electromagnetic actuator 135 is deenergized to release the restraint of the return blocking means 120.

(17-5) The solenoid valve 115 is opened and the weft pulling device 110 is operated.

(18) Restart the main motor 41. At this time, since weft insertion has not been made, the reed 21 hits the front of the cloth in the air.

(19) Based on the angle signal (0 °) emitted from the angle sensor 45 at the time of idle driving, the weft cutter for restarting 20
The electromagnetic actuator 201 of 0 is temporarily energized. As a result, the weft that has been urgently sucked by the weft sucking device 170 is cut by the cutter 200, and this is caught by the yarn waste collecting basket 118 via the conduit 179.

(20) The solenoid valve 177 is closed to stop the operation of the weft suction device 170.

The embodiment is as described above. In this embodiment, the main motor 41 is drive-controlled to perform the above-mentioned various operations, but the main shaft 42 is connected to another motor such as a low-speed geared motor to perform the above-mentioned drive control. Good. Further, each means constituting the above weft removing device can adopt a mode different from the exemplified one within the scope in which the present invention can be carried out.

Furthermore, if the present invention is applied to the open type weft insertion device shown in FIG. 15, the probability of operation error can be reduced. That is, when the step (3) or (8) is carried out in this open type, the auxiliary nozzle 13 (when the weft is inserted in a U-shape as shown in FIG. (Fig. 15). However, since the step (9) is carried out in the present invention, as described above, the auxiliary nozzle 13 escapes downward from the lower yarn row of the warp yarn Y in this process. At this time, the weft thread, which has been swollen, is supported by this bobbin thread row and the auxiliary nozzle
This is because the weft yarn is freely released because it is separated from 13.

As described above, according to the present invention, in a state where the miss yarn is exposed on the cloth fell, the weft yarns connected to the miss yarn are ejected toward the anti-weft insertion side, and the ejected weft yarn is impregnated. Since it is pulled by the weft pulling device on the side and removed together with the miss yarn, the injected weft yarn is pulled so as to be peeled from the cloth fell while forming a U shape between the miss yarn and the fluid injection nozzle. Therefore, the tension applied to the miss yarn becomes small, and the weft yarns connected to this become difficult to break.

Further, as a feature of the present invention, when applied to a weft insertion device such as a so-called closed type in which an air guide is provided in a sley on the cloth fell side of the reed, the miss yarn (CF) is exposed to the cloth fell. Then, when the weft yarns connected to the miss yarn are ejected toward the opposite weft insertion side (because the weft insertion period is in normal operation in the warp opening state), this ejected weft yarn is in the air guide path of the weft guide. Although it is retained in a U-shape, it is supported by the reciprocating operation of the reed, and the retained weft yarn is supported by the lower yarn row of the warp yarns and escapes from the weft escape passage. Become.

Also, when applied to a so-called open type weft inserting device in which a recess is formed on the cloth fell side of the reed wing and an air guide groove is formed by the row of the recesses, the miss yarn (CF) is exposed on the cloth fell. When the weft yarns connected to the miss yarn are ejected toward the side opposite to the weft insertion side in this state (because it is in the weft insertion period during normal operation in the warp opening state), this injected weft yarn rarely hits the auxiliary nozzle. In some cases, the auxiliary nozzle may escape downward from the bobbin thread row of the warp by moving the reed back and forth. At this time, the weft yarn caught by the auxiliary nozzle is supported by the bobbin thread row and freely released from the auxiliary nozzle, so that the removal of the miss yarn by the pulling device becomes more reliable.

[Brief description of drawings]

FIG. 1 is an overall explanatory view of an apparatus used in one embodiment of the present invention,
Fig. 2 is an actual view of the main parts of Fig. 1, and Fig. 3 is III-I of Fig. 2.
II is a side view, FIG. 4 is a partial cross-sectional side view taken along line IV-IV of FIG. 2, and FIG. 5 is an enlarged view of an essential part of FIG. 4, FIG. 6, FIG.
Figure 8 shows the actual condition of the main parts of Figure 1, Figure 9 shows Figure 8 and IX.
-IX sectional view taken along the line, Fig. 10 is an actual view of the main parts of Fig. 1, Fig. 11 is a timing chart of the operation of the main parts of the loom of Fig. 1, 12
(A) to (G) are operation flow charts of the control section of FIG. 1, FIG. 13 is an operation explanatory view of the loom based on the flow chart of FIG. 12, and FIG. 14 is a main part of the loom in which the present invention is implemented. Explanatory drawing, FIG. 15 is a principal part explanatory drawing of another loom in which this invention is implemented, and FIG. 16 is explanatory drawing of the conventional apparatus. 1,21 ...... Reed, 3 ...... Fluid injection nozzle 6 ...... Yarn feeder, 12 ...... Air guide groove 13 ...... Auxiliary nozzle, 15 ...... Pressure air supply source 17 ...... Control section, 23 ...... Air guide Child 24 …… Air guide path, 31 …… Injection control valve 41 …… Main motor, 42 …… Spindle 50 …… One-position clutch 70 …… Weft storage device, 80 …… Auxiliary motor 90 …… Thread brake, 105… … Weft detector 110 …… Weft pulling device, 120 …… Return blocking means 140 …… Weft cutter, 160 …… Cutting blocking means 170 …… Weft suction device, 180 …… Miss thread cutter 200 …… Restart weft cutter W: Weft yarn, M: Miss yarn CF: Woven cloth, C: Woven cloth

Front Page Continuation (72) Kenichi Iwatani Kenichi Iwatani 2 Takaracho, Kanagawa-ku, Kanagawa Prefecture Nissan Motor Co., Ltd. (56) References JP-A-58-104247 (JP, A) JP-A-62-282043 (JP, A) JP-A-59-228024 (JP, A)

Claims (1)

[Claims] 1. When a weft insertion error occurs when weft yarn (W) is ejected from a fluid jet nozzle (3) arranged on the weft insertion side, the miss yarn (M) is beaten. After that, the loom is stopped while connecting it to the fluid jet nozzle, and then the miss yarn is exposed to the cloth fell (CF), and the miss yarn (M) is exposed to the cloth fell and the weft yarns connected to the miss yarn are exposed. In the weft removing method in which the weft is ejected toward the reverse weft insertion side, and the ejected weft is pulled by the weft pulling device on the reverse weft insertion side and is removed together with the miss yarn, the weft yarn is connected to the miss yarn (M). From the time when the weft is ejected toward the opposite weft insertion side until it is pulled by the weft pulling device on the opposite weft insertion side and removed together with the miss yarn,
A weft removing method for a fluid jet loom in which a reed is moved back and forth.