JPH06101139A - Device for treating excess warp in jet room - Google Patents

Abstract

PURPOSE:To smoothly carry out excess warp treatment in a jet room. CONSTITUTION:A suction nozzle 28 is installed on the side of a tack-in device 10 for catching the tip of inserted weft Y and forming selvedge. A suction nozzle 28 is intermittently jetted by opening and closing of a solenoid valve V6 and the tip of inserted weft Y is held by a suction opening 28a. A hose 30 is connected to the suction nozzle 28 and a take-off pipe 31 is connected to the hose 30. Jet fluid of the suction nozzle 28 is blown through one branched part 31a and a joining part 31c of the take-off pipe 31 into a dust box 33. An excess warp T1 guided by a guide roller 32 is introduced through another branched part 31b and the joining part 31c of the take-off pipe 31 into the dust box 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn handling apparatus in a jet loom in which wefts are inserted into the warp shed by the action of jet fluid.

[0002]

2. Description of the Related Art A yarn-removing yarn (excess warp) treating device disclosed in Japanese Utility Model Laid-Open No. 54-69956 guides a yarn-removing yarn between a pair of meshing gears that rotate in synchronization with a yarn-removing-ear collecting device. It is being collected with.

The yarn-yarn processing device disclosed in Japanese Patent Application Laid-Open No. 48-36450 uses a reversible blower to take up the yarn. The take-up yarn is introduced into the collecting box, and a large number of ventilation holes are opened at the bottom of the collecting box, and a suction flow is generated in the ventilation hole when taking the take-up yarn. The drawn yarn accumulated in the accumulation box by this suction flow is cut from the succeeding drawn yarn when a predetermined amount is reached. The accumulated yarn is discharged from the accumulation box to the dust box by the reverse operation of the reversible blower.

[0004]

However, in the yarn-yarn processing apparatus disclosed in Japanese Utility Model Laid-Open No. 54-69956, the yarn-yarn may be wound around the meshing gear. If the take-up yarn winds around the meshing gear, it becomes impossible to remove the take-up yarn, and it becomes impossible to collect the throwing ears.

The yarn-yarn processing device disclosed in JP-A-48-36450 requires a blower dedicated to the yarn-yarn processing, which is disadvantageous in terms of cost. Moreover, since the suction flow in the ventilation holes becomes weaker as the amount of the drawn yarn accumulated in the accumulation box increases, it is necessary to make the suction flow strong from the beginning. However, if the suction flow is too strong, the yarn may break.

[0006] It is an object of the present invention to provide a drawn yarn processing apparatus which smoothly takes up the drawn yarn in a jet loom and is advantageous in terms of cost.

[0007]

Therefore, according to the present invention,
Targeting the jet loom where weft threads are inserted into the warp opening by the action of jet fluid, the weft insertion fluid jetting means used for weft insertion of the weft threads or the tip portion of the weft threads that have been put in are grasped by the action of the jet fluid. The weft yarn sent from the warp beam is guided to the jet action region of the weft grasping fluid ejecting means, and the weft yarn is drawn by the intermittent jetting action of the weft inserting fluid ejecting means or the weft grasping fluid ejecting means.

[0008]

The weft is injected into the warp opening by the main nozzle which constitutes the weft insertion fluid ejecting means, and is pulled by the auxiliary nozzle which constitutes the weft insertion fluid ejecting means. The front end portion of the weft inserted into the weft is gripped by the jetting action of the weft gripping fluid jetting means. The take-up yarn receives the take-up action along with the jetting action of the weft-inserting fluid jetting means or the weft-holding fluid jetting means. Since the jetting action of the weft-inserting fluid jetting means or the weft-holding fluid jetting means performs intermittent jetting in synchronization with the weft-inserting timing, the yarn is not cut.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the first invention will be described below with reference to FIGS. Main nozzle 1 for weft insertion
The weft yarn Y ejected from is passed on to the relay jets of the plurality of weft-insertion auxiliary nozzle groups 2, 3, 4, 5. When the weft insertion is performed well, the weft Y is detected by the weft detector 6 within a predetermined machine base rotation angle range. A weft presence / absence detection signal from the weft yarn detector 6 is input to the control computer C, and the control computer C selects either continuous operation or stop of the loom based on the weft presence / absence detection signal.

The weft-insertion pressure air jet in the weft-insertion main nozzle 1 is controlled by opening and closing the electromagnetic valve V ₁ . Pressure air injection for weft insertion in the weft insertion auxiliary nozzle groups 2-5 is controlled by the opening and closing of the electromagnetic valves _{V 2, V 3, V 4} , V 5. The electromagnetic valve V ₁ is connected to the pressure air supply tank 7, and the electromagnetic valves V _{2 to} V ₅ are connected to the pressure air supply tank 8.

The opening / closing control of each of the electromagnetic valves V _{1 to} V ₅ is performed by a command from the control computer C. The control computer C commands the opening and closing of the electromagnetic valves V _{1 to} V ₅ based on the machine base rotation angle detection signal from the rotary encoder 9.

As shown in FIGS. 1 and 2, a tuck-in device 10 is installed on the weft insertion end side. Reference numeral 11 is a cam box having a built-in cam mechanism, and a shaft 12 and a hollow shaft 13 are extended and supported in the cam box 11 so as to reciprocate back and forth in the warp T direction. The hollow shaft 13 has a needle shaft 14
And is reciprocally rotatable by driving a cam mechanism in the cam box 11. A needle 15 is attached to the tip of a needle shaft 14 extending from the hollow shaft 13. The rotation of the needle shaft 14 causes the needle 15 to move.
Of the upper part of the woven fabric W scrapes off the upper warp T to enter the warp opening and jumps out to the side of the end of the woven fabric W. As shown in FIG. 3, a threading hole 15a is provided at the tip of the needle 15.

A mounting base 16 is erected and fixed between the tip portions of the shaft 12 and the hollow shaft 13.
A holding block 17 is fixed to the. On the lower front surface of the holding block 17, a pair of nozzle bases 18 and 19 are provided so as to be vertically aligned. As shown in FIG. 2, a threading nozzle 18a is provided on the lower surface of the upper nozzle base 18,
An introduction hole 19a is formed in the lower nozzle stand 19 so as to face the injection port threading nozzle 18a. Further, a thread gripping nozzle 19b is provided on the upper surface of the lower nozzle stand 19,
The upper nozzle base 18 has an introduction hole 18b and a thread gripping nozzle 19b.
Indirectly opposite to b.

A pair of blades 20 and 21 are supported on the lower side surface of the holding block 17. Both blades 20 and 21 move back and forth integrally with the shaft 12 and the hollow shaft 13 to form the guide groove 2
The double blades 20 and 21 open and close by the guide action of the guide pins 3 and 24 and the guide pins 25 and 26. The end portion of the weft Y that has reached the weft insertion end side is cut by this opening / closing cutting operation.

A rotary valve mechanism 27 is attached to the side surface of the cam box 11, and is driven by a drive mechanism inside the cam box 11. The rotary valve mechanism 27 controls air injection in the threading nozzle 18a and the thread gripping nozzle 19b. The end portion of the weft yarn Y that has reached the weft insertion end side is cut by the opening / closing cutting operation of the blade bodies 20 and 21, and then gripped by the jetting action of the thread gripping nozzle 19b. Next, the cut end of the weft yarn Y is passed through the threading hole 15a of the needle 15 by the jetting action of the threading nozzle 18a. The end of the weft thread passed through the threading hole 15a forms a tuck-in selvage when the needle 15 retracts outside the warp opening.

A suction nozzle 28 is installed on the side of the tuck-in device 10 which forms such a tuck-in ear. The suction port 28a of the suction nozzle 28 is arranged on the side of the facing gap between the nozzle bases 18 and 19, and the tip of the weft Y inserted into the weft reaches the suction port 28a.

The suction nozzle 28 is connected to a pressurized air supply tank 29 via an electromagnetic valve V ₆ . The electromagnetic valve V ₆ is controlled to open and close by the control computer C. The opening period of the electromagnetic valve V ₆ is from the opening start time of the electromagnetic valve V ₅ to immediately after the opening / closing operation of the blade bodies 20 and 21. By opening and closing the electromagnetic valve V ₆ as described above, the tip portion of the weft yarn Y is gripped by the suction action of the suction nozzle 28.

A hose 30 is connected to the injection nozzle side of the suction nozzle 28. One branch portion 31 a of the Y-shaped take-up pipe 31 is connected to the other end of the hose 30. The take-up yarn T ₁ is introduced into the other branch portion 31b and the joining portion 31c of the take-up pipe 31 via the guide roller 32. A dust box 33 is installed in the extending direction of the merging portion 31c of the take-up pipe 31.

The jet flow from the suction nozzle 28 is the hose 3
0, the branch part 31a and the merging part 31c,
It blows into the box 33 and is cut by the blades 20 and 21.
Separated piece Y of the separated weft Y₁Is the dust box 3
It is discharged to 3. In addition, the lift introduced to the merging section 31c
Thread T₁Also by the injection action from the suction nozzle 28
It is taken to the dust box 33 side. This take over
Fried yarn T ₁Are sequentially discharged to the dust box 33
Will be issued.

In the jet loom provided with the tuck-in device 10, the suction nozzle 28, which is a fluid ejection means for weft grasping, is inevitably necessary. By using an existing device, which is a suction nozzle 28, which has been conventionally used for the yarn-drawing process, it is more advantageous in terms of cost than a new yarn-yarning device is installed. Further, since the suction nozzle 28 intermittently jets at the weft insertion timing of the weft Y, the take-up yarn T ₁ is also taken by the intermittent jetting action of the suction nozzle 28. The tip portion of the weft yarn Y is gripped by the suction action force accompanying the jetting of the suction nozzle 28, and this gripping force is smaller than the jetting force itself. The take-up yarn T ₁ is taken up by a jetting action stronger than the suction force for gripping the weft yarn Y,
If it is continuously exposed to such jetting action, there is a high possibility of cutting. However, since the suction nozzle 28 is intermittently jetted, the lifting yarn T ₁ is not cut. Further, the suction nozzle 28 injects for a predetermined period of one rotation of the loom, but the residual pressure acts on the lifted yarn T ₁ even outside the injection period. Therefore, the lifted yarn T ₁ is not loosened and is taken up while maintaining an appropriate tension.

The present invention is, of course, not limited to the above-mentioned embodiment, and the embodiment shown in FIG. 4, for example, is also possible.
In this embodiment, a distribution pipe 34 is connected to an electromagnetic valve V ₅ that controls the supply of pressure air to the weft insertion auxiliary nozzle group 5, and the weft insertion auxiliary nozzle group 5 and the take-up pipe 3 are connected from the distribution pipe 34.
1 may be supplied with pressurized air. The weft-insertion auxiliary nozzle group 5 is one of the weft-insertion fluid ejecting means, and intermittently ejects at a weft-insertion timing. The branch pipe 34 may be connected to other electromagnetic valves V _{1 to} V ₄ . The weft inserting main nozzle 1 is also one of the weft inserting fluid ejecting means.

In a jet loom not equipped with a tuck-in device, a stretch nozzle (one of the weft grasping fluid ejecting means) for grasping the tip end portion of the weft inserted by the action of the ejecting fluid may be used. This stretch nozzle also intermittently jets in synchronization with the weft insertion timing, and the pressure air intermittently supplied to the stretch nozzle can be used for the yarn-lifting process.

[0023]

As described in detail above, according to the present invention, the take-up yarn is drawn by the intermittent jetting action of the weft-inserting fluid jetting means or the weft-holding fluid jetting means. If it can be collected, it has an excellent effect.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a main part.

FIG. 3 is a longitudinal sectional view of a main part.

FIG. 4 is a schematic front view showing another example.

[Explanation of symbols]

28 ... Suction nozzles constituting weft grasping fluid ejecting means, 31 ... Take-off pipes, V ₆ ... Electromagnetic valves constituting weft grasping fluid ejecting means.

Claims (1)

[Claims] 1. In a jet loom in which a weft is inserted into a warp opening by the action of a jet fluid, a weft-inserting fluid jetting means used for weft-inserting the weft or a tip portion of the weft-inserted weft inserts the action of the jet fluid. A jet adapted to guide the lifted yarn sent out from the warp beam to the jet action region of the weft grasping fluid ejecting means to be grasped by the weft inserting fluid ejecting means or the weft grasping fluid ejecting means to intermittently eject the takeoff yarn. Yarn processing equipment in the room.