JPS61258049A - Weft yarn supply preparatory apparatus in 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] [Field of Industrial Application] The present invention relates to a jet loom for inserting weft yarns whose length has been measured by a weft length measuring drum using a fluid such as air or water, and particularly relates to a jet loom for weft insertion using a fluid such as air or water. This invention relates to a weft supply preparation device.

[Prior Art] A drum pool type weft storage device such as a weft measuring drum needs to rotate in complete synchronization with the crankshaft of the loom main body, and cannot rotate in the opposite direction.
If synchronization with the crankshaft cannot be achieved, it will not be possible to insert the specified length of weft at the specified timing, and if the length measuring drum etc. is reversed, the wound weft will be disturbed and weft insertion will not be possible. be.

During operation, the loom may stop due to thread breakage or other causes, and in such cases, the loom resumes operation after the cause of the stoppage is removed. Even in that case, the weft length measuring drum needs to rotate in complete synchronization with the crankshaft of the loom main body for the reasons mentioned above, and cannot rotate in the opposite direction.

In a loom with such a weft length measuring drum, if the operation is stopped due to yarn breakage or other reasons during operation, it is necessary to completely wrap the weft around the circumference of the length measuring drum, which depends largely on the skill of the operator. It was probably done manually,
Wrapping takes time to prepare, and the machine may be stopped for a long time, or restarting may not be smooth due to insufficient length of the weft wound, so as disclosed in Japanese Patent Application Laid-Open No. 59-125943, In Yuko's conventional weft supply preparation method, a weft supply preparation method has been proposed in which the weft is wound around a weft measuring drum in a loom, and the weft required for one big weft insertion is almost automatically stored. In order to realize the above-mentioned automatic storage, a clutch member is disposed between the drive system of the weft length measuring drum and the crankshaft of the loom to disconnect the two, and the weft length measuring drum is The drive system can be driven by an auxiliary motor, the auxiliary motor moves the weft length measuring drum to an appropriate position, the weft end is hooked to the weft length measuring drum at the appropriate position, and then the auxiliary motor moves the weft length measuring drum to the appropriate position. By rotating the long drum by a predetermined amount, a predetermined amount of weft yarn is stored on the weft length measuring drum under the cooperative action of drum bins that protrude and retract from the circumferential surface of the length measuring drum.

However, although there is no description in JP-A-59-125943 because it is not the gist of the invention, when adjusting the timing of the appearance and retraction of the drum pin mentioned above, the power to the loom is turned off, the brake of the main motor is released, and at the same time When the loom is stopped, the disengaged clutch member must be engaged, and then the handwheel of the loom body associated with the crankshaft must be turned to adjust the timing of the drum bin relative to the rotation angle of the crankshaft.

[Problems to be Solved by the Invention] Therefore, in the conventional technology, even when making a slight timing adjustment of the drum pin, separate operations such as turning off the power, releasing the brake, and engaging the clutch must be performed. However, the present invention aims to quickly solve these problems.

[Means for Solving the Problems] For this purpose, the present invention provides a weft length measuring drum drive system having an auxiliary motor and a crankshaft driven by a main motor having an electromagnetic brake. comprising a pair of clutch members and a clutch actuation means for actuating the clutch members to selectively connect the drive system and the crankshaft,
When the clutch member is disengaged, the clutch actuating means and the electromagnetic brake are electrically connected to a brake release button in the weft supply preparation device of the loom in which the drive system of the weft length measuring drum can be driven by an auxiliary motor. The clutch member is engaged and the electromagnetic brake is released by operating the brake release button.

[Operation] According to the weft supply preparation device of the present invention, both the engagement of the clutch member and the release of the electromagnetic brake are performed simultaneously by simply operating the brake release button, and the handwheel attached to the crankshaft is It becomes possible to adjust the timing by

[Embodiment] Next, a preferred embodiment of the weft supply preparation device according to the present invention will be described in detail with reference to the accompanying drawings, in which the same reference numerals indicate the same or corresponding parts.

FIG. 1 partially shows a jet loom equipped with a weft supply preparation device of the present invention, in which a crankshaft 1 of the loom is connected to a drive shaft 19, and the crankshaft 1 is connected to a main motor 6.
It is driven by a motor pulley 3a, a belt 4, and a driving pulley 3b.

An electromagnetic brake 7 whose operation is controlled by a control box 8 cooperates with the main motor 6, and a handwheel 2 is provided on the crankshaft 1, so that when the electromagnetic brake 7 is not activated, it can be manually operated. This allows the crankshaft 1 to rotate. Furthermore, the control box 8 includes a brake release push button 9 and a clutch member 1, which will be described later.
4.15 is electrically connected to a solenoid valve 5 (clutch actuating means) which can be engaged and disengaged under the control of a control box 8.

The drive shaft 19 is connected to a clutch member 14 and to a winding arm 28a of a weft length measuring drum 28 via another clutch member 15 that engages with the clutch member 14 and a drive belt 27. Weft length measuring drum 2
8 itself may be a well-known one, and B bin 29 and A bin 30
appears and disappears from the circumferential surface of the weft measuring drum 28 in synchronization with the rotation of the crankshaft, and the weft unwound from the weft cheese 32 via the tensor is wound onto the length measuring drum 28. Controls the drawing to the main nozzle 49.

The clutch member 15 is spline-coupled to the driven shaft 20. Further, the sleeve 16 is installed to be rotatable and movable in the axial direction relative to the driven shaft 20. Therefore, the clutch member 15 moves integrally with the sleeve 16 in the axial direction, but can rotate relative to the sleeve 16. As shown in the figure, the clutch members 14 and 15 are formed with engaging protrusions and four parts that extend to positions eccentric from the axes of the drive shaft 19 and the driven shaft 20. Clutch members 14.15 are engaged.

A compression spring 18 is installed between the boss 17 fixed to the driven shaft ZO and the left end of the sleeve 16, and the clutch member 1
When the clutch is in the 5th division, it is biased toward the right, that is, toward the clutch member 14 side. A gear 34 integrally attached to the end of the driven shaft 20 is engaged with a gear 35, and the gear 35 is connected to the electromagnetic clutch 3.
3 to the output shaft of the auxiliary motor 36. A lever 21 is swingably supported by a bin 22 provided on the machine base,
Its tip is engaged with the sleeve 16. The other end of the lever 21 is connected to a piston rod of an air cylinder 23 by a pin 24.

When the solenoid valve 5 is operated to extend the piston rod of the air cylinder 23, the lever 21 rotates counterclockwise to disengage the clutch member 14.15 against the spring force of the compression spring 18. . In this state, the electromagnetic clutch 33
If you connect the auxiliary motor 36, the rotation of the gears 34 and 35
As soon as the piston rod of the air cylinder 23 is retracted, the clutch member 14.15 is engaged by the spring force of the compression spring 18, and the main The rotation of the motor 6 is transmitted via the drive belt 27 to the winding arm 28a of the weft length measuring drum. Limit switch 26 is actuated by lever 21 to detect engagement of clutch member 14,15.

Reference numeral 71 is a yarn guide, 72 is a gripper, and this gripper 72 includes a cam 11 that rotates in time with the crankshaft, a lever 12 that swings around a fulcrum 13,
It is opened and closed by a cam follower 10 supported by the lever 2. The detector 73 detects that the weft yarn is being supplied to the main nozzle 49.

As is well known, the main nozzle 49 injects compressed air in synchronization with the movement of the crankshaft 1 and inserts the weft yarn into a shed formed between the warp yarns. The detectors 51 and 52 detect insertion of the weft yarn, and the reed 25 beats the inserted weft yarn.

Moreover, an ejector type suction nozzle 61 is provided as a suction member between the main nozzle 49 and the selvage thread. A shutter 63 is rotatably supported, and a suitable reciprocating member 62, such as an air cylinder or an electromagnetic solenoid, is connected to the pivot shaft of the shutter 63. Reciprocating member 6
2, the shutter 63 can be moved between a position outside the weft path ejected from the main nozzle 49 and a position on the weft path.

The air blow nozzle 64 faces the suction nozzle 61 across the weft insertion passage, and injects an air flow toward the suction nozzle 61 to blow the weft blocked by the shutter 63 into the suction nozzle 61 and suction it.

Although not shown, the limit switch 26, electromagnetic clutch 33, auxiliary motor 36, and detectors 51, 52, and 7 described above are included.
3. The suction nozzle 61, air cylinder 62, air blow nozzle 64, glyph puff 2, etc. are also connected to the control box 8, and send and receive signals.

Hereinafter, with reference to FIGS. 1 to 7, the operations during steady operation, abnormal stop, and timing adjustment will be explained.

(During steady operation) The crankshaft 1 is driven by the main motor 6 to cause the heald frame to move in an opening motion, and the weft is inserted into the shed formed between the upper and lower warps.

That is, in FIG. 1, the weft unwound from the weft cheese 32 through the tensor is passed through the winding arm 28 of the weft length measuring drum 28, which rotates in accordance with the rotation of the crankshaft 1.
After being wound around the weft length measuring drum 28 and measured by the weft thread a, the weft thread passes through the grippuff 2 and reaches the main nozzle 49. The operation of the gripper 72 and the main nozzle 49 is controlled by the control box 8 in synchronization with the rotation of the crankshaft 1, and compressed air injected from the main nozzle 49 moves the weft stored on the weft length measuring drum 28 up and down. The weft is inserted into the shed formed between the warp threads.

Next, effects during various abnormal operations will be explained.

In addition, in FIG. 2, the blocks surrounded by double lines indicate the work performed by the worker.

(When weft insertion error occurs) Referring to the second row from the right in Figures 1 and 2 and Figure 3, the detectors 51 and 52 installed near the selvedge yarns on the opposite side of the main nozzle 49 detect the warp yarns. Almost closed (crank angle α・2
50 to 300°) Check the weft insertion condition, and if for some reason the weft inserted into the shed does not reach the selvage yarn on the opposite side of the main nozzle 49, or a weft insertion error occurs,
The detectors 51, 52 issue a weft insertion error signal (crank angle α in FIG. 3).

The main motor stop signal based on this weft insertion error signal stops the operation of the main motor that drives the machine base, and enters inertial operation (crank angle α1 in FIG. 3).

Furthermore, when a weft insertion error signal is transmitted, the reciprocating member 62
The piston moves forward to cause the shutter 63 to cross the path of the weft yarn, and compressed air is injected from the air blow nozzle 64. In this way, the weft yarn ejected from the main nozzle 49 after a weft insertion error is blocked by the shutter 63, guided by the air jetted from the air blow nozzle 64, reaches the suction nozzle 61, and is sucked into the suction nozzle 61.

After the machine was coasting for about one cycle, the warp threads were almost closed (crank angle α2 = about 300°).
Stop at. When the machine 81 stops, the operator checks the misplaced yarn and turns on the reversal button if the worker determines that the weft insertion error is likely to cause a defect in the fabric.

As a result, the air cylinder 23 is activated, the clutch members 14.15 are disengaged, and the rotation of the crankshaft is not transmitted to the winding arm 28a of the measuring drum, while the electromagnetic clutch 33 is connected. In this state, the machine is reversed (crank angle α3 in Figure 3). When the machine starts reverse rotation, the air cylinder 23 is turned off and the clutch member 15 is pressed toward the clutch member 14 by the spring 18, but both clutch members 14 and 15 are out of phase and do not engage. The rotation of the crankshaft 1 is not transmitted to the winding arm 28a of the length measuring drum 28.

In order to remove the wrong weft inserted into the shed, the machine is
The crank angle (crank angle α, = approx. 180")
After the machine is reversed (from 300° to 180°), the machine is stopped.

Next, the operator inspects the machine and first checks to see if the weft thread is connected from the weft cheese 32 to the suction nozzle 61 (if not, it will be treated as the next supply error). Remove the mis-inserted weft thread, turn on the mistaken weft removal confirmation button installed for fool proofing, and then turn on the start button (crank angle α in Fig. 3).

When the start button is turned on, the auxiliary motor 36 moves the driven shaft 20 and the weft length measuring drum 2 to perform -th phase alignment.
No. 8 winding arm 28a is driven in the forward direction. As a result, when the phases of the clutch members 14.15 match, they are pressed by the compression spring 18 and both clutch members 14.15 engage with each other, and the rotation of the auxiliary motor 36 is stopped (crank angle α6 in FIG. 3). During this period, the winding arm 28a of the weft length measuring drum (crank angle when stopped = approximately 300°) is rotated forward to an angle corresponding to the crank angle (approximately 180°) of the reversed machine base (the forward rotation angle is 240'), winding arm 28
As shown in FIG. 4, the weft length measuring drum 2
The A bin 30 of No. 8 is retracted, and the weft for one big on the length measuring drum 28 is removed by suction by the suction nozzle 61.

Next, the weft in front of the main nozzle 49 is cut by a cutter provided near the suction nozzle 61, and then,
The air cylinder 23 operates, and the clutch members 14, 15
is disengaged so that rotation of the crankshaft is not transmitted to the winding arm 28a of the length measuring drum. On the other hand, the electromagnetic clutch 33 is connected, and in this state the machine base is reversed for automatic mouth alignment (see Fig. 3, crank angle αT).
).

When the machine starts to rotate in reverse for alignment, the air cylinder 23 is turned off and the clutch member 15 is pressed against the clutch member 14 by the spring 18, but since the phases of both clutch members 14 and 15 are shifted, They are not engaged, and the rotation of the crankshaft 1 is not transmitted to the winding arm 28a of the weft length measuring drum 28.

The machine rotates in reverse to the restart position (crank angle a, = approximately 300°) and stops.

Next, for secondary phase alignment of the weft length measuring drum 28,
The auxiliary motor 36 drives the driven shaft 20 and the weft length measuring drum 2.
8 winding arm 28a is driven in the forward direction (
(120° of crank angle 180° → 300°), when the phases of clutch members 14 and 15 match, both clutch members 1
4.15 is engaged and the rotation of the auxiliary motor 36 is stopped.

During this time, the winding arm 28a of the weft length measuring drum 28 is rotated forward by an angle corresponding to the amount of reverse rotation of the machine table (α in FIG. 3), and as shown in FIG.
Since the A bin 30 protrudes and the B bin 29 retracts, one big worth of weft yarn is stored on the length measuring drum 28. In this state, the machine resumes operation.

(At the time of weft supply error) Referring to the right end of FIG. 2 and FIG. There is a so-called supply error in which the weft yarn is not supplied to the main nozzle 49.

In this case, when the machine is stopped, the weft thread is not properly connected from the weft cheese 32 to the suction nozzle 61. In such a case, after stopping the above-mentioned reverse rotation of the machine machine, remove the weft thread that was incorrectly inserted. between the step of turning on the confirmation button and the step of turning on the confirmation button (crank angle α, ~α, in Fig. 5)
Then, the thread is passed through the weft measuring drum 28, and the weft is normally connected from the weft cheese 32 to the suction nozzle 61. That is, the weft is pulled out from the weft cheese 32 and passed through the main nozzle 49 from the circumference of the weft length measuring drum 28.
The tip of the weft yarn is put into the suction nozzle 61. Note that instead of being sucked into the suction nozzle 61, it may be hooked onto the temple of a loom, for example.

When the weft is guided from the weft cheese 32 to the suction nozzle 61 in this way and the start button is pressed, the next step is to perform the weft length measurement drum-next phase alignment according to the procedure described above.
The driven shaft 20 and the winding arm 28a of the measuring drum are driven in the forward direction by the auxiliary motor 36, and are rotated forward to an angle corresponding to the crank angle of 180° of the reversed machine base (the forward rotation angle is 240°). One pick of weft on the long drum 28 is removed by suction by the suction nozzle 61, and when the clutch members 14 and 15 match their phases, they engage with each other and the rotation of the auxiliary motor 36 is stopped. While the auxiliary motor 36 is rotating, one block worth of weft yarn is removed from the length measuring drum 28.

Next, the cutter cuts the weft yarn in front of the main nozzle 49, and then, with the clutch members 14 and 15 disengaged, the machine is reversed to the restart position (crank angle 300°) for mouth alignment. and stop.

Furthermore, in order to perform secondary phase alignment of the weft length measuring drum, the auxiliary motor 36 drives the driven shaft 20 and the winding arm 28a of the length measuring drum in the positive direction again, so that the A bin 30 and the B bin 29 of the length measuring drum 28 are aligned. It emerges and retracts (see FIG. 6), and stores one block worth of weft (approximately three and a half turns of weft) on the length measuring drum 28. In this state, the machine will resume operation.

(At the time of warp thread breakage, selvage thread breakage) Referring to the second row from the left in Fig. 2 and Fig. 7, if the warp thread or selvage thread breaks, after the machine has stopped, the cut warp thread or Tie the selvedge threads, turn on the confirmation button, and then turn on the start button.

When the warp yarn breaks or the selvedge yarn breaks, there is no weft yarn that was inserted incorrectly, so there is no need to remove the weft yarn.・Main nozzle 49
In order to make the weft yarn length from the tip to a predetermined length, the optimum crank angle (α) for cutting the weft yarn is determined from the crank angle at rest (α2=approximately 300°).

= approx. 180°), reverse the machine (300” → 1
120° of 80°).

Following the same procedure as when turning on the start button in the case of a weft insertion error described above, the winding arm 2 of the driven shaft 20 and the weft length measuring drum 28 is operated by the auxiliary motor 36.
8g is driven in the forward direction (?lIl long drum - next phase alignment) and rotated in the forward direction to an angle corresponding to the crank angle (approximately 180°) of the reversed machine base (the crank angle rotated in the forward direction is approximately 240°), One pick worth of weft on the length measuring drum 28 is removed and suctioned away by the suction nozzle 61, and the clutch members 14 and 15 engage with each other when their phases match, and the rotation of the auxiliary motor 36 is stopped.

Next, the cutter cuts the weft yarn in front of the main nozzle 49, and then, with the clutch members 14 and 15 disengaged, the machine is moved to the restart position (300° in terms of crank angle) for mouth alignment. Reverse and stop.

Next, the auxiliary motor 36 drives the driven shaft 20 and the winding arm 28a of the weft length measuring drum 28 in the forward direction again, so that the B bin 29 and the A bin 3 of the length measuring drum 28 are moved.
0 appears and disappears, and one big worth of weft (approximately three and a half turns) is stored on the weft length measuring drum 28. In this state, the machine will resume operation.

(When the stop button is operated) In this case, the process is the same as the process at the time of warp thread breakage or selvage thread breakage described above, except that the warp thread or selvage thread binding step is not necessary.

(When adjusting the timing) When adjusting the timing, an inching operation is performed in which the handwheel 2 connected to the crankshaft 1 is operated to rotate the crankshaft 1 by hand.For safety reasons, the inching operation is performed when the machine is stopped. It is necessary to release the electromagnetic brake 7 of the main motor 6, which is in a state where the crankshaft 1 can be rotated by hand. Therefore, when turning the machine by hand, press the brake release button 9 to control the machine.
The electromagnetic brake 7 is released under the control of the roll box 8 and rendered inoperable.

In addition, in order to deal with the delayed response of the clutch especially during inching operation, the clutch member 14.15 is
Since the clutch members 14 and 15 are disengaged, the clutch members 14 and 15 must be engaged in order to rotate the machine base by hand and adjust the timing.

According to the present invention, as described above, the brake release button 9
By pressing , the electromagnetic brake 7 is released, and at the same time, the electromagnetic valve 5 is closed by a signal from the control box 8 to cut off the supply of compressed air to the air cylinder 23, and the clutch member 15 is released by the compression spring 18. It is urged toward the clutch member 14 side and engages.

In this state, turn the handwheel 2 to adjust the desired timing.

In the above embodiment, between the time when the machine is stopped and the machine is restarted, at least one big worth of weft yarn stored in the weft length measuring drum is removed by a suction member suction nozzle 61 provided on the outlet side of the main nozzle. The weft yarn is not limited to suction by a winder, but may also be removed by other appropriate pulling means such as a winder. Therefore, in this specification, ``suction'' includes ``take-up'' by such means. It is something that

Furthermore, the method of the present invention can be applied even after detecting a misplaced yarn and holding the weft yarn next to the misplaced yarn with a gripper or the like on the upstream side of the main nozzle to prevent weft insertion by preventing it from being jetted from the main nozzle. It is possible.

Furthermore, in the above embodiments, a type of weft storage device is used in which the length measuring drum is stopped and the winding arm rotates around it to wind and store the weft. The weft may be of a type in which the weft is wound around the circumferential surface and stored.

[Effects of the Invention] As described above, according to the present invention, the operations of releasing the brake and engaging the clutch can be performed with a single operation of activating the brake release button originally attached to the switch box of the machine. It is possible to realize the reduction that can be performed.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of a jet loom equipped with a weft supply preparation device of the present invention, FIG. 2 is a flowchart of an embodiment of the present invention showing operator operations enclosed by double lines, and FIG. 4 is a plan view showing the procedure for storing the weft yarn on the weft measuring drum of FIG. 3, and FIG. FIG. 6 is a plan view showing the procedure for storing the weft on the weft measuring drum in FIG. 5, and FIG. 7 is a chart showing the processing operation when the warp or selvage yarn breaks. DESCRIPTION OF SYMBOLS 1... Crankshaft 6... Main motor 7... Electromagnetic brake 9... Brake release button 5... Clutch actuating means (electromagnetic valve) 14... Clutch member 15... Clutch member 2
8...Weft length measuring drum 36...Auxiliary motor Applicant: Toyota Industries Corporation, Ltd.

Claims (1)

[Claims] A pair of clutch members disposed between a drive system for the weft measuring drum having an auxiliary motor and a crankshaft driven by a main motor having an electromagnetic brake; A weft supply preparation device for a loom, comprising a clutch actuation means for selectively connecting a crankshaft, and in which the drive system of the weft length measuring drum can be driven by an auxiliary motor when the clutch member is disengaged. Weft supply preparation in a loom, characterized in that a means and an electromagnetic brake are electrically connected to a brake release button, and actuation of the brake release button engages a clutch member and releases the electromagnetic brake. Device.