JPS59125943A - Supply preparation of weft yarn - 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] Technical Field> The present invention relates to weft length measurement 1: Weft yarn unwound from weft cheese is stored on a ram, and the weft yarn is opened in a drum pool type jet loom in which the weft is inserted by a jet nozzle. The present invention relates to a method capable of almost automatically preparing a supply of food.

The weft measuring drum of the present invention may be of the type in which the drum rotates and the weft is wound around its circumference and stored, or the drum is stationary and the weft is wound around it (one tube rotates). Any type of winding and storage of the weft yarn may be used.

<Problems with the Prior Art> The drum pool type weft storage device must rotate in complete synchronization with the crankshaft of the loom body, and cannot rotate in reverse. If synchronization with the crankshaft is not achieved, a predetermined length of weft yarn cannot be inserted at a predetermined timing, resulting in a weft insertion error. Furthermore, if the drum or the like is rotated in the opposite direction, the wound weft yarns will be disturbed and weft insertion will not be possible.

4u 431 may stop operating due to thread breakage or bending during operation. In such a case, restart the machine after removing the cause of the stoppage. In that case too,
For the reasons mentioned above, the drum boule type weft storage device must rotate in complete synchronization with the crankshaft of the loom main body, and cannot rotate in the opposite direction.

Previously, when a loom stopped due to thread breakage or other reasons, the weft was wound around the drum circumference by hand (and restarted. Although it may seem simple, a lot depends on the skill of the operator, and winding was time consuming and required the machine to be stopped for a long time, or the length of the weft wound was insufficient, making it difficult to restart smoothly. .

<Object of the present invention> An object of the present invention is to provide a method for winding weft yarns around a drum-type weft pooling device in a loom and almost automatically storing the weft yarns necessary for one big weft insertion.

According to the present invention, the drive system of the weft length measuring drum is disconnected from the loom weaving shaft, and the drive system of the weft length measuring drum can be driven by an auxiliary motor. The hook is set at an appropriate position, the weft end is hooked onto the weft length measuring drum at the appropriate position, and then the auxiliary motor rotates the weft sub-length drum in a predetermined manner to accumulate a predetermined number of wefts on the weft length measuring drum. This object is achieved by a weft supply preparation method characterized by:

<Explanation of Examples> Hereinafter, the present invention will be explained in detail with reference to the drawings.

The drawing is a schematic plan view of an air jet room in which the present invention is implemented, and a crankshaft 12 of the loom is driven by a belt 12 from a main motor 13. The crankshaft 12 is also connected to a weft sub-length drum 28 via a clutch member 14.15 and a gear train 27. Note that reference numerals 29 and 30 appear and retract from the circumferential surface of the weft length measuring drum in synchronization with the rotation of the crankshaft 12, and wind the weft yarn unwound from the weft cheese 32 through the tensor 31 onto the weft sub-length drum 28. This is a bottle that controls the attachment and withdrawal to the gint nozzle 49.

The clutch member 14 is connected to the drive shaft 1 connected to the crankshaft 12.
9 is integrally connected. On the other hand, the clutch member 15
is spline connected to the driven wheel 2o. Further, the sleeve 16 is installed on the driven shaft 2o so that it can rotate relative to it and move in the axial direction.

Therefore, the clutch member 15 moves integrally with the sleeve 16 in the axial direction, but can rotate relative to the sleeve 16. Note that, as shown in the figure, the clutch member is formed with an engaging protrusion and a recess at a position eccentric from the axes of the drive shaft 19 and the driven shaft 20, so that the clutch member 14 and 15 are not engaged until the phases of the protrusion and the recess match. is engaged.

Reference numeral 34 designates an Imil vehicle, which is formed integrally with the clutch member 15 with the sleeve 16 sandwiched therebetween, and is spline-connected to the driven wheel. 18 is a compression spring, which includes a boss 17 and a sleeve 16 fixed to the driven shaft 20.
The tooth TJ34 is provided between the gears 34 provided at the left end of the
Then, the clutch member 15 is biased toward the right, that is, toward the clutch member 14 side. The gear 34 is an auxiliary motor 36
It is possible to engage with a gear 35 mounted on the output shaft of.

A lever 21 is swingably supported by a bin 22, and its tip is engaged with a sleeve. of lever 22.

The other end is connected to the screws 1 to 1 of the air cylinder 23 by a pin 24. When the switching valve 34 is operated to extend the screw 1-rod of the air cylinder 23, the clutch member 14 resists the spring force of the compression spring 18.
．． 15 is disengaged, gears 34 and 35 are engaged, and the rotation of the auxiliary motor is transmitted to the weft sub-length drum 28. On the other hand, when the screws 1 to 15 of the air cylinder 23 are retracted, the clutch members 14 and 15 resist the spring force of the compression spring 18.
is engaged, teeth $34.35 are disengaged, and the rotation of the main motor 11 is transmitted to the weft length measuring drum 28.

A disk 4o for phase detection is attached to the driven shaft 20.

A slit or opening is formed in the disk, and a pair of light emitters and light receivers 37 and 38 can be ejected.

In addition, a proximity switch, etc. may be used in place of the emitter and receiver. Further, 391 is a control box for the projector and light receiver, and 26 is a limit switch for detecting engagement of the clutch members 14 and 15.

A gripper 33 opens and closes in synchronization with the crankshaft of the loom. Reference numeral 72 denotes an auxiliary gripper, which is opened and closed independently of the gripper 33 by an electromagnetic sirenoid 71. A main air jet nozzle 49 injects compressed air in synchronization with the movement of the crankshaft to insert the weft yarn into the opening between the warp yarns. A feeler 73 detects that the weft is being supplied to the main air jet nozzle. 51 and 52 are feelers for detecting weft insertion, and 25 are reeds for beating the inserted weft yarns.

Further, an ejector type suction nozzle 61 is provided between the main air jet nozzle 49 and the selvage thread, and an appropriate reciprocating member 6 such as an air cylinder or an electromagnetic solenoid is provided.
2 is connected to the suction nozzle 61, and a guide plate 63 fixed to the tip of the suction nozzle 61 by the operation of the reciprocating member 62 is positioned outside the path of the weft ejected from the main air jet nozzle 49 and the weft path. Can be moved between the positions above. 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.

Next, an embodiment of the weft supply preparation method at the time of abnormal stop of the present invention will be described. During steady operation, the main motor 11 to the crankshaft 1
2 is driven to cause the heald frame to perform an opening motion, and the weft threads are inserted into the shed formed between the upper and lower warp threads. That is, in FIG. 1, the weft yarn unwound from the cheese 32 via the tensor 31 is transferred to the crankshaft 12 via the clutch members 14 and 15.
After being measured by the weft length measuring drum 28 which rotates in accordance with the rotation of the weft yarn, the yarn passes through the gripper 33 and reaches the main air jet nozzle 49. Gripper 33 and main air generator 1
- The operation of the nozzle 49 is controlled in synchronization with the rotation of the crankshaft 12, and the compressed air injected from the main air jet nozzle 49 moves the weft stored on the weft measuring drum 28 between the upper and lower warps. The weft is inserted into the shed formed in the

Detectors 51 and 52 installed near the selvedge threads on the opposite side from the main air jet nozzle 49 detect the warp threads 21. ) Check the weft insertion condition when the shed is closed (crank angle 250 to 300 degrees), and check if the weft inserted into the shed does not reach the selvedge yarn on the opposite side of the main air jet nozzle 49 for some reason. If a mistake occurs, the detectors 51, 52 issue a weft insertion error signal. The main motor stop signal (t1 in FIG. 2) such as the weft insertion error signal causes the operation of the motor 11 that drives the machine to be stopped, and the machine enters a loss-making operation.

Furthermore, when a weft insertion error signal is transmitted, the reciprocating member 62
The screws 1 to 1 move forward to intersect the guide plate 63, which is stopped at the tip of the weft nozzle 61, with the warp mark of the weft. In this way, after making a weft insertion mistake, the main air jet (-nozzle 4)
The weft yarn ejected from the weft 9 is guided by the guide plate 63, reaches the suction nozzle 61, and is sucked into the suction nozzle 61.

Further, the cutting function of the weft thread cutting cutter is temporarily inactivated so that the weft thread that has been mis-inserted is connected to the jet nozzle. Therefore, weft insertion is prevented after the weft insertion error signal is sent, and the weft thread is transferred from the shed to the suction nozzle 61.
After that, it is connected to the main air jet nozzle 49.

After about one cycle of the inertial operation, the machine stops with the warp almost closed (crank angle of about 300 degrees), and a machine stop signal is sent ((2) in Figure 2).

When the machine is stopped, the air cylinder 23 is operated (FIG. 2, 13), and the clutch member 14.15 is disengaged, while the gear 34.35 is engaged, and the driven shaft 20 is connected to the auxiliary motor 36.
It becomes possible to drive.

In this state, the operator inspects the machine, removes the cause of the abnormality, and resumes machine operation.

First, check whether the weft is connected from the weft cheese 32 to the suction nozzle 61 (t3' to t4 in Figure 2).
.

If the connection is normal, pushbutton switch (not shown)
to return the air cylinder 23 to the clutch member 1.
4. Engage 15 and resume machine operation. Regarding the operation in this case, please refer to, for example, Japanese Patent Application No. 77436/1989 filed by the present applicant.

One of the causes of the above-described weft insertion error is that the weft yarn is cut between the weft cheese 32 and the main air jet nozzle 49, and the weft yarn is not supplied to the main air jet 49.

In this case, from the weft cheese 32 to the suction nozzle 6
Up to 1, the weft threads are not connected properly. In such a case,
First, operate the push button switch (not shown).
(r4 in Fig. 2) starts the auxiliary motor 36, rotates the weft sub-length drum 28 by the auxiliary motor 36 and light emitting/receiving devices 37, 38, and when the weft length measuring drum 28 reaches the appropriate position by the disk 40 (the second 2, Fig. 15), and the auxiliary motor 36 is stopped (Fig. 2, ts).

The weft is pulled out from the weft cheese 32, and the weft length measuring drum 2
8 (t6 to t7 in FIG. 2), hooked on the pin 3o, and further passed through the main jet nozzle 49 to cause the tip of the weft to be sucked into the suction nozzle 61. Instead of being sucked into the suction nozzle 61, it may be hooked onto the temple of the loom, for example.

When the auxiliary motor 36 is started again by pressing the button (t7 in FIG. 2), the gear 35 and the gear 34 are rotated, and the weft length measuring drum 28 is rotated, and the weft is wound around its circumferential surface.

When the light emitting/receiving devices 37 and 38 detect a slit or opening in the disk 40 (t9 in FIG. 2) (during this time, approximately three and a half turns of the weft are wound around the circumferential surface of the weft measuring drum 28), the air cylinder 23 Exhaust the air. As a result, the gear 34 together with the clutch member 15 is biased toward the clutch member 14 due to the action of the compression spring 18 . However, at this point, the phases of the clutch members 14 and 15 are still not aligned.
Since the gears 34, 35 are in mesh, the driven shaft 2o is still rotated by the auxiliary motor 36.

When the phases of the clutch members 14, 15 match, the clutch members 14, 15 are engaged by the spring force of the compression spring 18, and at the same time, the gear 34 is disengaged from the gear 35, and the rotation of the auxiliary motor 36 is no longer transmitted to the driven shaft 2o. Clutch member 1
4 is detected by the limit switch 26 (Fig. 2 [9)], the auxiliary motor 36 is stopped, and the main motor 1 is
1 and resumes operation of the loom, the weft length measuring drum 2
8 is driven by the main motor 11 via clutch members 14,15.

Effects of the Present Invention> According to the present invention, it is possible to almost automatically perform weft thread numbering on the weft length measuring drum, reducing the worker's labor load and increasing labor productivity. Malfunctions due to inexperience can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an outline of the drive system of the air engine 1 to the room according to this embodiment, and FIG. 2 is an operation diagram of one embodiment of the present invention. 11...Main motor, 12...Crankshaft,
14.15...Clutch member, 2516. Reed, 28 river weft side length drums,
49... Main air dien 1 ~ nozzle, 51.52.
...Detector, 6110. Suction nozzle/L, 62
...Reciprocating member, 63...Guiding plate, Patent applicant: Toyota Industries Corporation, Patent application agent, Eiji Sannaka (Procedural amendment writing method) January 6, 1980, Commissioner of the Japan Patent Office, Wakasugi Kazuo 1, Indication of the case Patent application 3 filed on December 27, 1980, Relationship with the amended person's case Patent applicant name (321) Toyota Industries Corporation 4, Agent address Taito, Tokyo 2-3-7 Taito 110 Nikko Palace Akihabara 601 Telephone (835) 8231-2
Section 6. Contents of amendment: Engraving of drawings (no change in content) 7. List of attached documents

Claims (1)

[Scope of Claims] 1. The drive system of the weft sub-length drum is disconnected from the weaving crankshaft so that the drive system of the weft length measuring drum can be driven by an auxiliary motor, and the auxiliary motor drives the weft sub-length drum. The yarn hook is set at an appropriate position, the weft end is hooked onto the weft assistant length drum located at the appropriate position, and then the weft assistant length drum is rotated in a predetermined manner by the auxiliary motor to store a predetermined amount of weft on the weft length measuring drum. A weft yarn supply preparation method characterized by: 2. The weft yarn according to claim M1, wherein the proper positioning and predetermined rotation of the weft yarn length measuring drum are carried out by a rotation detector installed between an auxiliary motor and the weft yarn length measuring drum. Supply preparation method. 3. A clutch member is provided between the drive system of the weft sub-length drum and the crankshaft of the loom, and the engaging portion of the clutch member is eccentric from the rotation axis, and the drive system of the weft sub-length drum is The weft supply preparation method according to claim (7), wherein the system and the crankshaft of the loom engage only in a predetermined phase.