JP2674723B2 - Yarn supply method and yarn supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for supplying a thread to a thread pulling device for threading a thread through a heald, a dropper and a reed.

[0002]

2. Description of the Related Art As a preparatory step for cloth weaving, there is a work of passing a thread (hereinafter, in-process thread) actually used for cloth weaving into a heald, a dropper, or a reed (hereinafter, heald, etc.). Such a thread pulling operation is a beam in which a large number of various kinds of work threads that differ depending on the type of cloth to be woven are wound (hereinafter, work beam).
These work-in-process yarns are pulled out from each of them, and each yarn is passed through a through hole such as a heald.

By the way, depending on the kind of cloth to be woven, the kinds of work-in-process yarns are different, and depending on the kind of work-in-process yarn, it is difficult to pull the thread through the hole such as the heald due to its nature and thickness. In spite of this, in the past, since the work-in-process yarn was always passed directly through the heald or the like, the pull-in time, the thread tensioning time, and the inspection and correction time for the crossing were remarkably changed, which hindered automation of the work. Further, as the kinds of woven fabrics have increased, warp yarns having various properties and physical properties have come to be used, which is also a cause of significantly reducing the success rate of threading.

As a method for solving such a problem, for example, as disclosed in Japanese Patent Laid-Open No. 2-264045, a thread, that is, a seed thread, which is easily threaded into a through hole of a heald or the like is used as the heald or the like. It has been provided that the tip of the work thread is tied to the end of the seed thread after the thread is passed and the work thread is pulled through a through hole such as a heald by pulling the seed thread. However, in the method and apparatus disclosed in the above publication, the first and second gripping means provided separately in the yarn feeding direction are alternately operated and the first gripping means provided upstream of the first gripping means.
Of the thread and the second drawing means provided on the upstream side of the second gripping means are alternately operated to draw the thread in a direction substantially perpendicular to the feeding direction to draw the thread from the thread cone and to set a predetermined length. Since the yarn is unwound, there is a problem that the whole operation is complicated and the feeding speed becomes slow. There is also a problem in the accuracy of measuring the length of the yarn.

[0005]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to make a yarn of a predetermined length smoothly and at a high speed,
It is an object of the present invention to provide a yarn supply method and a device that can supply the yarn to the threading device with high accuracy.

[0006]

According to one aspect of the present invention, a yarn wound on a cone is sandwiched by a delivery roller and fed out to measure the length, and the tip of the yarn is guided from one end of a passage of the yarn guide to the yarn guide. Air is blown from the nozzle toward the other end, the tip of the yarn is supplied to the vicinity of the yarn drawing device, and after the yarn is taken out of the passage of the yarn guide, the yarn on the one end side of the yarn guide is removed. The ends are fixed by a pair of tapes, and the portion of the thread on the side fixed by the tapes is cut.
Another invention of the present application is a yarn guide in which a yarn wound around a cone is fed and a feeding length is measured, and a yarn guide provided adjacent to the feeding roller and having a passage opened to a side portion thereof. A nozzle that is provided adjacent to one end of the thread guide and blows the thread together with air into the passage of the thread guide; and a thread that is disposed near one end of the thread guide and that exits from the thread guide. A thread fixing mechanism for fixing the thread with a pair of tapes, a cutting mechanism disposed adjacent to the thread fixing mechanism for cutting the thread, and near the other end of the thread at substantially right angles to the extending direction of the thread guide. And a guide rod that extends.

[0007]

The thread unwound from the cone is sandwiched by the pay-out roller and is sent out, and its length is measured, and the tip of the thread is sent near one end of the passage of the thread guide. Then, the tip of the yarn is blown toward the other end of the yarn guide by the air blown from the nozzle arranged near one end of the yarn guide. When the tip of the yarn is sent to the other end of the yarn guide, the air from the second nozzle blows air on the tip of the yarn in a direction substantially perpendicular to the extending direction of the passage and is supplied to the vicinity of the yarn drawing device. It When the tip of the yarn is supplied in this way, the yarn on one end side of the yarn guide is moved with respect to the yarn guide to bring the yarn out of the yarn guide, and the yarn is fixed by a pair of tapes. After that, the yarn is cut by a cutting device.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7, there is shown a yarn feeding device 1 according to an embodiment of the present invention. 1 and 2
In the drawing, the drawing is divided into [A] and [B] for the purpose of drawing, but they should be stacked vertically to form an integrated structure. In the figure, the yarn supply device 1 is roughly divided into a length measuring and feeding mechanism 2, a yarn guide 3, and a first nozzle 4 provided at one end (lower end in the figure) of the yarn guide.
A second nozzle 4a provided at the other end (upper end in the figure) of the thread guide 3, a thread fixing mechanism 5 and a cutting mechanism 6 (FIG. 3) provided near one end of the thread guide 3, and a thread guide Three
And a guide rod 8 extending in a direction substantially perpendicular to the yarn guide 3 near the upper end of the yarn guide 3, which are arranged in a positional relationship as shown in FIG. .

The thread guide 3 is a frame 10 in this embodiment.
It is constituted by a long first guide, that is, a vertical guide 30 that is fixed to and vertically extends, and a second guide, that is, a horizontal guide 30a provided adjacent to the upper end of the vertical guide 30. The vertical guide 30 is a long member having a rectangular cross section as shown in FIG. This vertical guide 3
A passage 31 penetrating in the longitudinal direction is formed at 0, and the passage is formed between the lower end position A of the vertical guide 30 and the position B near the upper end by the slit 311 so that the side surface of the vertical guide, that is, the extending direction of the guide rod 8, that is, the drawing. No. 1 opens on the side surface in the right direction. Further, at the position C immediately above the position B of the vertical guide 30, as shown in FIG. 9, the passage 31 is provided with the slit 312 so that the rear surface of the vertical guide (left side in FIG. 2) is formed.
It is open to. In addition, in the vicinity of this position C, the vertical guide 3
An inclined surface 313 is formed at 0. This inclined surface is provided to facilitate withdrawal of the yarn from the passage 31. Further, in the position D above the position C, as shown in FIG. 10, the passage 31 is opened to the rear side of the vertical guide by the slit 312.

On the rear surface of the vertical guide 30, a guide plate 33 is fixed near the position C. The guide plate is formed with an inclined surface 331 for guiding the yarn when it is pulled out of the yarn guide. As shown in FIG. 11, in the vicinity of the upper end of the vertical guide 30, a nozzle hole 41a extending substantially at right angles to the passage 31 of the vertical guide and opening to the front side surface (right side surface in FIG. 2) of the vertical guide is formed. ing. The nozzle hole 41a is connected to an air pressure source (not shown). The nozzle hole 41a constitutes the second nozzle 4a. A pair of holes 35 penetrating in the horizontal direction and communicating with the passages 31 are formed in the middle portion of the vertical guide 30 so as to be separated in the extending direction of the vertical guide, that is, vertically.

The lateral guide 30a includes a portion 301 and a portion 302.
And a passage 31a penetrating in the longitudinal direction as shown in FIG. 13 is defined by them. The passage 31a is aligned with the nozzle hole 41a so as to be aligned. The portion 301 is fixed with respect to the vertical guide 30, and the portion 302 is reciprocally movable in the direction of the arrow in FIG. 12 with respect to the portion 301 by a driving device such as an electric motor or a cylinder. In the yarn guide 3, the tip end of the yarn is moved to the other end (upper end in FIG. 1) in the passage by jet air blown by the first nozzle 4 on one end (lower end in FIG. 1) of the passage 31 of the vertical guide 30. The tip end of the yarn is made to pass through the passage 31a of the lateral guide 30a by the jet air blown toward the nozzle and then blown by the second nozzle 4a.

The length-measuring and feeding mechanism 2 includes a length-measuring and feeding motor 21 mounted on the frame 10 near the lower portion of the yarn guide 3, a length-feeding roller 23 fixed to an output shaft 22 of the motor 21, and a length-feeding roller 23. Laura 2
And a pressing roller 24 which is disposed adjacent to No. 3 and is in contact with the outer circumference of the feeding roller 23 to press the yarn s together. The motor 21 may be of any type as long as it can precisely control the rotation angle of the output shaft 22. The pressing roller 24 is rotatably attached to a lever 25 that is swingably supported by the frame 10. Lever 25
The pressure roller 24 is always elastically pressed by the spring 26 to the outer circumference of the feeding roller. The pay-out roller 24 has a large diameter so that the length of the pay-out yarn can be measured by its rotation angle.

The first nozzle 4 has a main body 41. The main body 41 has a through hole 42 that vertically penetrates the main body 41 and a nozzle hole that opens obliquely upward in the through hole 42, as shown in FIG. And 43 are formed. This first nozzle device is
By blowing the pressure air into the through hole 42 from the nozzle hole 43, the tip of the yarn is sucked into the through hole 42 and sent into the passage 31 of the yarn guide 3. This nozzle 4 is supported by a well-known method (not shown) so as to be movable between a position M directly below the longitudinal guide 30 shown in FIG. It is adapted to be moved by a device having the above structure, such as an air cylinder.

The thread fixing mechanism 5 has a column 51 attached to the bracket 11 fixed to the frame 10 and a pair of reels 52 rotatably attached to the column. Each reel 52 holds a roll r of adhesive tape wound in a roll. Thread fixing mechanism 5
Further has a pair of guide rollers 53 rotatably supported by the frame 10 and a pair of nipping rollers 54. The pair of nipping rollers 54 is provided at the position N. The outer circumference of the sandwiching roller is formed with irregularities like a spur gear for the purpose of ensuring the close contact between the tape and the thread.
The yarn fixing mechanism 5 is arranged such that when the first nozzle 4 is moved from the position M to the position N and the yarn is discharged out of the passage 31 of the longitudinal guide 30, the yarn is fixed near the pair of nipping rollers 54 by a pair of rolls r. Positioning is performed between the adhesive tapes t pulled out from, and the thread is fixed by the adhesive tapes.

The cutting mechanism 6 is arranged directly below the nip roller 54 at the position N, and has a fixed blade 61 and a movable blade 6.
And 2. The fixed blade 61 is fixed to the frame 10 and is rotatably attached to the movable blade 62 with respect to the fixed blade. The fixed blade 61 and the movable blade 62 are tapered so that a V-shaped groove 63 is formed between them. The yarn s is so positioned in the bottom portion of the V-groove when the first nozzle 4 is moved to position N. The movable blade 61 is adapted to interlock with a drive shaft rotated by a motor 74 of a traverse mechanism described later by a known method.

The traverse mechanism 7 includes a lever 71 movably mounted on the side of the vertical guide 30 near the hole 35.
And through the pair of holes 35 of the vertical guide 30 through the pair of guide tubes 72 fixed to the lever.
It has a pair of traverse members 73 extending along the. In this traverse mechanism 7, a lever 71 is driven by a linkage device 75 such as a cam mechanism driven by a motor 74, so that the upper and lower traverse members 7 passed through the upper and lower holes.
3 has a position aligned with line U-U and a position aligned with line V-V in FIG. Twilling member 7
3 may be a wire, a twill, or the like.

The yarn guide 3 and each mechanism are intermittently moved together with the frame 10 along the guide rod 8 at a predetermined pitch in the direction of the arrow in FIG. 3 by a known driving device (not shown). In addition, b is a thread s rotatably supported by a bracket 15 fixed to the frame 10.
Is a cone, 91 is a guide ring attached to the upper portion of the vertical guide 30, and 92 is a guide roller rotatably attached to the bracket 12 (fixed to the frame 10) under the vertical guide 30. . 9
Reference numeral 3 denotes a conical spring type preload roller that applies tension to the yarn fed to the feeding roller 23.

In the above structure, first, the thread is first manually pulled out from the bobbin b and passed through the guide ring 91,
After passing through the preload roller 93, it is passed between the feeding roller 23 of the post-measuring length feeding mechanism 2 and the pressing roller 24, and is further hung on the outer periphery of the guide roller 92 so that the tip is inserted into the through hole 42 of the first nozzle 4. No On the other hand, the tips of the pair of adhesive tapes t of the thread fixing mechanism are fixed to the fixture 95. This completes the preparation for the yarn supplying operation.

Next, pressurized air is blown into the through hole 42 from the nozzle hole 43 of the first nozzle 4. Then, the tip of the thread s is guided toward the passage 31 of the vertical guide 30 into the through hole 42 by the force of air. However, in this state, the tip of the yarn cannot advance into the passage 31. Next, when the output shaft 22 of the motor 21 is rotated in the direction of arrow X by an angle corresponding to the length of the yarn to be fed by the feeding roller 23, the yarn is fed by the action of the feeding roller 23 and the pressing roller 24 to a predetermined length. Be done. Therefore, the tip first nozzle 4 of the thread s
The air flow blown into the passage 31 of the yarn guide 3 moves toward the upper end of the passage 31. The vertical guide 3 indicates that the tip of the thread s has reached the upper end of the passage 31 of the vertical guide 30.
When detected by the sensor 96 provided at the upper end of 0, the air is discharged from the nozzle hole 41a of the second nozzle 4a into the lateral guide 30a.
Is blown toward the passage 31a, and the tip of the yarn is sent to the supply position. In this state, the rotation of the feeding roller 23 is once stopped, and the yarn feeding is stopped. When the preparation of any one of the dropper, the heald, and the reed is completed, the feeding roller 23 is again length-measured and stopped in order to pull it through these. At this time, the pair of traverse members 73 of the traverse mechanism 7 are positioned, for example, in the direction of line U-U.

Next, the portion 302 of the lateral guide 30a is separated from the portion 301, and the entire lower side of the passage 31a is opened to the outside.
Then, the yarn in the passage 31a falls as shown by the chain double-dashed line in FIG. At this time, from the upper portion of the passage 30 (the portion above the guide rod 8), the thread is shown by s ′ in FIG. 2 by the action of the slit 312, the inclined surface 313 formed on the vertical guide 30 and the inclined surface 331 of the guide plate 33. As shown in FIG.

Thereafter, the first nozzle 4 is moved in the direction from the position M to the position N with respect to the yarn guide 3, and the slant surface 331 of the guide plate 33 causes the yarn s in the passage 31 of the longitudinal guide 30 to move as shown in FIG. It goes out of the vertical guide 30 as indicated by s'in FIG. At the same time, the vicinity of the lower end of the thread enters the groove 63 defined by the pair of blades 61 and 62 of the cutting mechanism 6, and the portion immediately above it is sandwiched between the pair of tapes t and fixed by the tape. Then, the movable blade 62 of the cutting mechanism operates to cut the yarn. In this way 1
The book thread supply operation is completed.

Next, the first nozzle 4 moves from position N to position M.
Is returned to. Then, the tip of the cut subsequent thread is positioned by the nozzle 4 immediately below the passage 31 of the longitudinal guide 30. After that, the next yarn is supplied in the same manner as described above.
The second nozzle is not always necessary.

[0023]

According to the present invention, the following effects can be obtained as compared with the conventional method and apparatus. (1) By eliminating the gripping means and the withdrawing means and using a single length measuring and feeding device, it is possible to speed up the supply speed, improve the length measuring accuracy, and simplify the structure. (2) Since the traverse mechanism is provided in the yarn supplying section, the yield in the subsequent process can be improved. (3) Since the thread end is fixed with tape, the thread is entangled,
It is possible to prevent winding and winding of the twill cord.

[Brief description of the drawings]

FIG. 1 is a vertical side view of an embodiment of a yarn feeding device according to the present invention, in which [A] shows an upper portion and [B] shows a lower portion.

FIG. 2 is a vertical front view of the yarn feeder shown in FIG. 1, in which [A] shows an upper part and [B] shows a lower part.

FIG. 3 is a perspective view of the yarn feeding device of FIG. 1, showing only a main part in a lower schematic manner.

FIG. 4 is an enlarged view of a portion [A] in FIG.

5 is an enlarged view of a portion [B] in FIG.

FIG. 6 is an enlarged view of a portion [A] in FIG.

FIG. 7 is an enlarged view of a portion [B] in FIG.

8 is a cross-sectional view of the vertical guide taken along the line IV-IV in FIG.

9 is a cross-sectional view of the vertical guide taken along the line C in FIG.

10 is a cross-sectional view of the vertical guide taken at position D in FIG.

11 is a cross-sectional view of a vertical guide and a horizontal guide cut at a position E in FIG.

FIG. 12 is a cross-sectional view of a lateral guide.

FIG. 13 is a sectional view of a first nozzle.

FIG. 14 is an enlarged cross-sectional view of a part of the vertical guide, showing the positional relationship between the passage of the vertical guide and the traverse member of the traverse mechanism.

FIG. 15 is a perspective view of the upper portion of the vertical guide, as seen from the rear.

[Explanation of reference numerals] 1 yarn supplying device 2 length measuring and feeding mechanism 21 motor 23 feeding roller 24 pressing roller 3 yarn guide 30 longitudinal guide 30a lateral guide 31, 31a passage 4, 4a nozzle 5 yarn fixing mechanism 6 cutting mechanism 7 twilling mechanism

Claims (3)

(57) [Claims] 1. A yarn wound around a cone is sandwiched by a delivery roller to be delivered and measured, and the tip of the yarn is blown with air from a nozzle from one end of a passage of the yarn guide to the other end of the yarn guide, The tip of the yarn is supplied to the vicinity of the yarn drawing device, and after the yarn is taken out of the passage of the yarn guide, the end of the yarn on the one end side of the yarn guide is fixed by a pair of tapes. A yarn feeding method, characterized in that a portion of a yarn on a fixed side is cut by a tape. 2. A pay-out roller for paying out the thread wound around the cone and measuring the pay-out length, and a thread guide provided adjacent to the pay-out roller and having a passage open to the side. A nozzle provided adjacent to one end of the yarn guide and blowing the yarn into the passage of the yarn guide together with air, and a pair of yarns arranged near one end of the yarn guide and discharged from the yarn guide. Thread fixing mechanism for fixing with a tape, a cutting mechanism arranged adjacent to the thread fixing mechanism for cutting the thread, and a guide extending near the other end of the thread at a substantially right angle to the extending direction of the thread guide. A yarn supply device comprising: a rod. 3. The yarn supply device according to claim 2,
The yarn guide middle almost perpendicularly penetrate the extending direction of the passage and forming a plurality of holes spaced vertically, the respective holes disposed leasing member extending along the extending direction of the guide rod A yarn feeding device, wherein the traverse member is movable in the passage in opposite directions alternately.