JP2664627B2 - Method and apparatus for separating and supplying yarn - 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 separating and supplying yarns suitable for use in a dropper device for passing a yarn through a heald, a dropper, a reed or the like in a fabric weaving preparation process.

[0002]

2. Description of the Related Art In a cloth weaving preparation process, there is an operation of passing a thread through a heald, a dropper and a reed. This work involves taking out one by one from a large number of yarns arranged in a plane in a stretched state, and taking the yarns individually to a heald, a dropper, or at least one heald, a dropper and one Although the thread is passed through the reed at a stretch, in recent years, with the development of technology that automatically performs the threading work in this preparation process, one thread is automatically selected from a large number of arranged threads. Separate supply technology has also been developed. Such a conventional method and apparatus for separating and supplying a yarn includes Japanese Patent Application Laid-Open No. 5-1.
Japanese Patent Application Laid-Open No. 25640/1993 and Japanese Patent Application Laid-Open No. 5-125564 / 1995 disclose such a device.

The method described in the former publication is shown in FIG.
As shown in FIG. 2, a hook member a slidable in the normal direction with respect to the alignment plane of the yarn t is provided, and a pair of twill tubes is moved from one side of the yarn alignment plane to the other side or in the opposite direction. By alternately oscillating and moving forward and backward, when the oscillating and retreating, the twill tube approaches the aligned plurality of yarns, and a separation space is formed between the foremost yarn of the plurality of yarns and the succeeding yarn group. Forming
The claw b of the hook member a is inserted into the separation space to separate the yarn. However, in this method, the yarn is only separated near the upper end of the entire length of the yarn.
When adjacent objects are stuck to each other due to a veiling, they can be separated only at the portion near the twill, and it is difficult to separate the entire single yarn and supply it to the nozzle position.
Further, when only a part of the yarn is moved, two yarns may be moved at the same time, and there is a possibility that the yarn may not be reeled or the yarn may be broken.
Further, a hook member and an operating mechanism for operating the hook member must be provided, and there is a problem that the apparatus becomes complicated accordingly.

[0004] On the other hand, the method described in the latter publication, as shown in FIG.
When released from the hoop of sash with the rotation of
The suction nozzle g for separation approaches the end of the yarn t and sucks and grips the end of the yarn. Thereafter, the end of the yarn is moved to the right in the drawing, and the end of the yarn is moved to the center of the yarn chuck h. To separate. Then, after grasping the yarn end, the end of the yarn is cut by the cutter i,
The yarn is supplied to the slit k of the suction box j while being held by the yarn chuck. However, in the device described in the above publication, the yarn is separated after cutting the end portion of the yarn, so that there is a problem that the yarn separation cannot be performed reliably and smoothly.

[0005] The drawing machine has a pair of laces for alternately laying a large number of yarns which are drawn from a beam wound with a large number of yarns and are aligned. It has a pair of twill tubes through which it passes.
The twill tube is configured to swing.

[0006]

One problem to be solved by the present invention is that the use of such a twill tube effectively separates one yarn from a number of yarns by means of a twill tube, thereby providing a separation mechanism. Is to simplify the structure.

Another problem to be solved by the present invention is that, before cutting the yarn, the vicinity of both ends of the yarn is grasped, and after the cutting, a certain resistance is given to the movement of the yarn so that the yarn can be reliably fed to the yarn feeding device. Is to do so.

[0008]

According to one aspect of the present invention, a pair of twill braids extending through a pair of twill tubes are alternately hung on a group of a plurality of yarns arranged in a plane, and one yarn from the group of yarns is provided. In a separating and supplying method of a yarn, wherein a separation groove is formed on the outer periphery of each of the yarns, and the yarns are alternately swung while being axially moved toward the yarn group side. Is moved so that one thread at the end of the thread group is engaged with the separation groove, and the side twill tube is moved in the axial direction to the opposite side to separate one thread engaged with the separation groove from the other thread group. After inserting a separating claw that moves along the direction in which the yarn is extended between the one separated yarn and the yarn group, the separating claw is moved along the yarn, and the one yarn is moved to the yarn group. It is configured to be separated from.

In the above invention, further, the separated 1
The upper and lower two portions of the yarn are held by the yarn gripping device so that the yarn can move with respect to the yarn gripping device when a predetermined tension is applied to the yarn, and then separated above the upper yarn gripping device. It is good to cut the thread. In addition to the above,
The cut yarn is dragged down and the vicinity of the cut end of the yarn is gripped by the lower yarn gripping device. Thereafter, the yarn is blown toward the threading passage of the yarn feeding device with jet air.
Thereafter, the gripping force of the lower thread gripping device may be reduced to guide the thread end to the downstream threading passage.

In another aspect of the present invention, a pair of twill braids extending through a pair of twill tubes are alternately cross-hung on a group of a number of yarns arranged in a plane, and one yarn is separated from the group of yarns. In the yarn separating / supplying device, a separating groove engageable with the yarn to be separated is formed on the outer periphery of each of the twill tubes, and the twill tube is axially moved while being alternately swung. And an endless rail device is provided in which the endless rail adjacent to the yarn moves along the yarn from top to bottom in the vicinity of the end of the yarn group. A separating claw that separates one yarn from another yarn group is inserted between the two yarns.

In the above-mentioned other invention, a pair of yarn holding devices may be provided for holding a vertically separated position of one separated yarn so as to be movable with a predetermined pressure. A yarn pulling member inserted between the yarn and the yarn group to shift the yarn to a predetermined position may be provided adjacent to the yarn gripping device.

[0012]

In the yarn separating / supplying device having the above structure, the pair of twill tubes is axially moved toward the yarn group while being swung to one side, and the yarn at the side of the twill tube is engaged with the separation groove formed in the twill tube. At this point, the pair of twill tubes stops oscillating while being aligned in the direction in which the yarns extend, and after being partially engaged, returns to the original position in the axial direction to separate one yarn from the yarn group. . As described above, since the yarn can be effectively separated by using the pair of twill tubes, the conventional separating hook and a driving mechanism therefor are not required, and the apparatus can be simplified.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a yarn separation and supply device 1 according to the present embodiment. The separation and supply device 1 is roughly provided with a yarn separation mechanism 2 and a yarn feeding mechanism 6. 2 and 3, the yarn separating mechanism 2 is a line OO
And a pair of twill tubes 21 through which a pair of twill strings s alternately threaded are passed through a large number of yarn groups arranged in a plane perpendicular to the plane of FIG. The pair of tubes 21 is fixed to a movable member 22 (FIG. 4) which is reciprocated by a known method with the center of the two tubes as the center of rotation. It reciprocates with a pipe. In the present invention, the movable member 22 is capable of reciprocating in the axial direction of the twill tube (the direction perpendicular to the plane of FIG. 2) in addition to the reciprocating swing described above. Therefore the twill tube 21
Can be reciprocated in the axial direction in addition to the reciprocating swing.
As shown in FIG.
3 are formed. The separation groove has a surface 24 substantially perpendicular to the axis of the twill tube and a conical surface 2 extending obliquely to the surface.
As described later, after the twill tube moves in the direction of the yarn group and one yarn engages with the separating groove 23, when one yarn moves in the opposite direction, one yarn is faced. At 24, it is hooked, moved and separated.

The yarn separating mechanism 2 further includes a movable separating device 30 disposed adjacent to the yarn below the position where the twill string is provided. The moving separation device 30 includes a driving pulley 31 driven by a known method, a driven pulley 32 rotatably supported, an endless rail 33 wound around the driving pulley and the driven pulley, and the endless rail 33. And one or more separating claws 34 arranged and fixed on the upper side, and a guide 35 for separating claws arranged adjacent to the yarn. The separation claw is a member having a wedge-shaped cross section with a narrow leading side. The guide 35 is a rod-shaped member having a rectangular cross section and extending in the direction in which the yarn extends, and a groove 36 through which the separation claw 34 passes is formed on the side facing the yarn. The groove 36 has a flared upper portion so that the separation claw can easily enter.

The yarn separating mechanism 2 further includes an upper thread gripping device 40 provided above the driving pulley 31 and adjacent to the driving pulley and a yarn separating mechanism 2 provided below the driven pulley 32 and adjacent to the driven pulley. A lower thread gripping device 40a is provided, and a thread pulling device 50 is provided adjacent to each of the thread gripping devices. Since both the upper thread gripping device and the lower thread gripping device have the same structure, the structure and operation of the upper thread gripping device will be described below.

As shown in FIGS. 6 to 9, the thread gripping device 40 includes a fixed claw 41 having a groove 41a extending in the longitudinal direction, and a movable claw 42 accommodated in the groove.
The movable claw 42 is rotated with respect to the fixed claw by a pin hole 41b of the fixed claw 41 and a pin 43 passed through the pin hole 42b of the movable claw. The fixed claw 41 further has a notch 41c at the end on which the groove is formed, and a narrow thread receiving groove 41d extending laterally of the notch. The width of the thread receiving groove 41d is determined by the thickness of the thread t to be separated and supplied, so that the thread does not flatten out when the thread enters exactly into the groove and is gripped in cooperation with the movable claw. . The fixed claw 41 and the movable claw 42 are connected to each other by a spring 44 received in a hole 41 e formed in a rear portion of the fixed claw 41.
The fronts are biased toward each other. Fixed nail 4
In the vicinity of the bottom of the first groove 41a where the yarn receiving groove 41d is located, for example, a yarn holding tip 45 made of a ceramic material is used.
Has been fixed. The thread gripping device 40 includes a movable claw 42
When the tip 42c of the movable claw is moved in the direction of arrow W (FIG. 8) by a driving projection provided on the yarn pulling device described later, the front portion of the fixed claw and the front portion of the movable claw are slightly separated from each other, and the yarn receiving groove is formed. The thread is inserted into 41d. After the thread enters the thread receiving groove 41d, the movable claw is in the state shown in FIGS. 6 and 8, and is determined by the spring 44 between the thread presser tip 45 fixed to the fixed claw and the movable claw 42. The yarn is movably gripped in a direction in which the yarn is extended by a force determined by the applied compression force, and a predetermined tension is applied to the yarn.

As shown in FIGS. 6 and 7, the yarn pulling device 50 includes a yarn pulling plate 53 fixed to a piston rod 52 of a cylinder 51 and a driving projection member 56 fixed to the yarn pulling plate 53. Have. The yarn pulling plate 53 is used for the yarn holding device 4.
0, and the tip (opposite to that attached to the piston rod) has inclined surfaces 54 and 5
5. The drive projection 57 formed by the drive projection member 56 extends between the front portion of the fixed claw 41 of the thread gripping device 40 and the front portion 42c of the movable claw 42, and the thread pulling plate is driven by the cylinder. In addition, the movable claw 42 is rotated. When the leading end of the yarn pulling plate 53 is retracted to the position Q in FIG. 6, the yarn t enters the entrance of the yarn receiving groove 41d of the yarn gripping device, and then the cylinder 51 operates to move the yarn pulling plate 53. When the tip moves to the position P by moving to the opposite side to the arrow W, the thread t entering the thread receiving groove 41d is moved to the bottom of the thread receiving groove by the action of the inclined surface 54.

As shown in FIG. 3, the thread feeding mechanism 6 is provided below the lower thread gripping device 40a, and includes a servomotor 61 and a rotating shaft 61a of the servomotor 61.
And an extension arm 62 fixed to the arm. The axis of the rotary shaft 61a of the servomotor 61 is a plane including the axis of the threading passage 102 formed in the main body 101 of the thread feeder 100 provided adjacent to the lower gripping device (in this embodiment, FIG. (Paper surface). The vicinity of one end of the feeding arm 62 is fixed to the rotating shaft 61a so as to swing in accordance with the rotating movement of the rotating shaft on the plane. Therefore, the servo motor 61 constitutes a drive mechanism for the extension arm, and the rotary shaft 6
The rotation speed 1a can be freely controlled to an arbitrary speed.

A mounting member 62a is fixed to the other end of the feeding arm 62, and a thread roller 63 is rotatably mounted to a distal end of the mounting member 62a. The thread roller 63 has a groove formed on the outer periphery, and receives the thread in the groove. The extending arm 62 moves between the position M and the position N, and rotates the rotating shaft 61 of the servomotor 61.
It rotates in accordance with the reciprocating rotation of a. When the feeding arm 62 is at the position M, the thread roller 63 attached to the tip of the attachment member 62a is
It is on the opposite side of the payout arm from a line OO connecting the yarn supply position to the yarn feeder 100 and the rearward arrangement position of the yarn.

The feeding mechanism 6 further includes a guide roller 64 rotatably arranged at a fixed position in proximity to the tip of the feeding arm 62 at the position M, and a holding device for holding the rear of the yarn at the line OO. Device 65. The yarn holding device 65 holds a large number of yarns arranged in a plane including the line OO and perpendicular to the plane of FIG. 3, and may be a device having a known structure. Therefore, detailed description of the structure and function is omitted.

In the feeding mechanism 6 having the above structure, the line O
3 and a plurality of yarns held in parallel on a plane perpendicular to the plane of FIG.
, And the upper end is cut by a cutter (not shown) after being held by the yarn holding device 40. At this time, the delivery arm 62 is at the position M, and the roller 63 attached to the delivery arm is on the left side (as viewed in FIG. 1) of the line OO as shown by a solid line in FIG.
The roller and the thread are on the same plane as the paper of FIG. Under such a state, the delivery arm 62 is
When rotated clockwise by one rotation shaft 61a,
The thread enters the groove formed on the outer periphery of the thread roller 63, and the thread t is twisted. At this time, since the rear of the yarn is held by the yarn holding device 65, the rear of the yarn cannot be turned by the yarn roller, and the cut upper end moves downward. When the delivery arm 62 reaches the position N, the operation of the servomotor 61 stops, and the delivery arm also stops at that position. At this time, the upper end of the thread t is
Stop with a slight protrusion above 0a.

Next, the nozzle device 103 of the yarn feeder 100
When the jet air is blown out toward the threading passage 102, the thread t is threaded by the blowing force or by the combined force of the blowing force and the suction force by the jet air blown downstream of the threading passage. The portion facing the entrance side of the passage is bent toward the inside of the threading passage and stopped. Next, by the operation of the cylinder 51, the upper end of the yarn is fixed to the fixed claw 41 and the movable claw 4 of the lower thread gripping device 40a.
Slip through the meantime by 2 are separated, the upper end t _e as indicated by the broken line in FIG. 3 enters the turned head threading passage. Even in this state, when the feeding arm 62 is stopped at the position N, the yarn is not further fed into the threading passage.
Next, when the servo motor 61 operates and the payout arm 62 starts to rotate in the counterclockwise direction, the yarn is
The air is sent toward the downstream side of the threading passage 102 by the action of the jet air blown out from the nozzle 3. In this case, the speed of the unwinding arm 61 in the counterclockwise direction is determined by the speed of the yarn t moving away from the yarn roller 63 to the yarn feeding device, the speed of the jet air flowing through the threading passage, and preferably the yarn is unwound. The speed is determined such that the speed is slightly lower than the speed at which the yarn moves in the passage through the jet air by the jet air without any restriction such as an arm, that is, without movement. That is, the speed at which the yarn t passes through the threading passage without restraint is V, the speed at which the yarn t leaves the yarn roller 63 and moves to the yarn feeder is V ₁ , and the yarn roller attached to the tip of the feeding arm 62 is V is the movement speed in the counterclockwise direction of
When _2, a V> V _1, because it is V ₁ ≒ 2V _2, a V> 2V _2. It said V ₁ was, preferably, for example 60 m / sec
Which is usually in the range of 10 m / sec to 100 m / sec.

When the speed of the feeding arm 62 that rotates from the position N toward the position M, that is, rotates in the counterclockwise direction, that is, the peripheral speed of the yarn roller attached to the feeding arm is determined as described above, the yarn feeder is determined. end t _e of yarn t traveling 100 of the threading passage 102 on the downstream side is in the state as attracted to always tip by the action of air jets. That is, the thread is always passed in a stretched state. For this reason, clogging of the yarn in the middle does not occur. In addition, the structure does not need to be stopped every time the hole is passed through the hole of the heald or the dropper. In addition, even if the end of the thread momentarily emerges from the threading passage that is open at the side for some reason, the end vibrates slightly, so that a force returning to the inside of the passage is generated, and the thread returns to a predetermined position. Threading can be accomplished.

Next, the overall operation of the above apparatus will be described with reference to the operation explanatory diagrams of FIGS. Many threads t
Are arranged substantially parallel to the plane of FIG. 2 in a plane perpendicular to the plane of FIG. A twill string s extending through a pair of twill tubes 21 is alternately tapped on the yarn. The group of a large number of yarns t is held by a yarn holding device (not shown) at a position above the twill tube and held by a yarn holding device 65 at a position below. Under such a state, the twill tube 21 is reciprocated between R and S in FIG. 2 by reciprocating rocking of the movable member and moving in the axial direction (axial direction of the twill tube). ] In the direction of the yarn group. Then, the yarn t closest to the twill tube on the side released by the swing of the twill tube enters as shown in FIG. 10C, and the other yarns are protruded forward by the twill tube. Thereafter, the twill tube moves further forward and stops swinging in a state of being aligned in a straight line in the elongation direction of the yarn (FIG. 10 [D]). After returning to the original position, it returns to the original position in the axial direction. For this reason, the yarn t entering the separation groove is pulled by engaging with the surface 24 defining the separation groove, and FIG.
As shown in [E] and FIG. 11A, a gap g is formed apart from the yarn groups.

Then, the endless rail 33 is moved in the same direction by rotating the driving sprocket 31 of the moving / separating device 30 in the direction of the arrow in FIGS. 2 and 11, and the separation claw 34 attached to the endless rail is moved. As shown in FIG. 11A, the endless rail 33 enters the gap g between the one yarn separated by the twill tube 21 and the remaining yarn group, and moves downward along the yarn. The separation claw 34 separates the entire yarn.

The single yarn separated as described above is subjected to the operation of the yarn pulling plate 53 of each of the upper and lower yarn pulling devices 50, and the yarn catches formed on the fixed claws 41 of the upper and lower yarn gripping devices 40 and 40a. The thread is inserted into the groove 41d, and is held by the fixed claw 41 and the movable claw 42 of the thread gripping device so that the thread can slide and move between them when tension is applied to the thread. Thereafter, the cutter above the twill tube operates to cut the upper end of the separated yarn. In this state, the yarn t is supplied from the inlet of the threading passage 102 of the yarn feeding device 100 to the nozzle device 10.
3 is positioned at a predetermined position. At this time, the feeding arm 62 of the yarn feeding mechanism 6 is at the position M, and the roller 63 attached thereto is on the left side (in FIG. 3) of the yarn t. Thereafter, the feed-out arm 62 is rotated clockwise toward the position N by the operation of the servo motor 61, and the yarn is manually dragged below the yarn feeder 100. At this time, since the rear of the yarn is held by the yarn holding device 45, the upper end of the yarn cut by the cutter is manually dragged toward the yarn feeder, and the upper end t _{e of the} yarn when the feeding arm reaches the N position. Is a lower thread gripping device 40a
Slightly protruding above the.

Next, the nozzle device 103 of the yarn feeder 100
Jet air when blown towards the stringing through passage 102, the yarn enters the yarn threading passage end t _e is disengaged from the lower thread gripping device 40a, toward the downstream side end thereof turned from the head . In this state, the pay-out arm 62 is rotated in the counterclockwise direction to allow the movement of the yarn, and the yarn moves toward the downstream side of the threading passage 102 by jet air, and is disposed downstream of the yarn feeder. The thread is passed through the hole of the heald, dropper or the like. Since the jetting of jet air is started while the yarn is stretched and a constant jet force is applied to the yarn to guide the yarn to the yarn end, the yarn does not dance by removing the yarn grip, and the yarn flies. Direction and flying power are stabilized.

[0028]

According to the present invention, the following effects can be obtained. (1) Since the yarn can be separated in a stretched state, an intermediate holding means for re-threading is not required. (2) Reliable separation can be achieved over the entire area of the threading. (3) Since separation is performed using a twill tube, there is no need to separately provide a hook for separation, and the structure can be simplified. (4) Since separation is performed using a twill tube, the distance to the mobile separation device is shortened, and delivery is ensured. (5) The position of the yarn with respect to the yarn feeder is constant, the direction of the jet air to the yarn and the flying force are stabilized, and the blowing to the predetermined position in a short time is ensured. (6) The movement of the yarn roller can be reliably followed when the yarn is dragged, so that the length measurement of the yarn is constant and the length of the yarn end can be constant.

[Brief description of the drawings]

FIG. 1 is a view schematically showing a yarn separation and supply device of the present invention.

FIG. 2 is a diagram showing in detail an upper half of the yarn separation and supply device of FIG. 1;

FIG. 3 is a view showing in detail a lower half of the yarn separation and supply device of FIG. 1;

FIG. 4 is a side view showing a pair of twill tubes.

FIG. 5 is an enlarged side view of the twill tube.

FIG. 6 is a top plan view of the yarn gripping device and the yarn pulling device.

FIG. 7 is a side view of the yarn gripping device and the yarn pulling device.

FIG. 8 is a plan sectional view of the yarn gripping device.

FIG. 9 is an exploded view of a fixed claw and a movable claw of the thread gripping device.

FIG. 10 is an explanatory diagram of the operation of the twill tube.

FIG. 11 is an operation explanatory view of the twill tube and the moving separation device.

FIG. 12 is a diagram showing an example of a conventional device.

FIG. 13 is a diagram showing another example of the conventional device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Separation supply apparatus of a yarn 2 Thread separation mechanism 6 Thread feed-out mechanism 21 Aya pipe 23 Separation groove 30 Movement separation device 31, 32 Pulley 33 Endless rail 34 Separation claw 40, 40a Thread gripping device 50 Thread pulling device

Claims (6)

(57) [Claims] 1. A yarn group formed by arranging a large number of yarns in a plane,
A method for separating and supplying one thread from a group of threads by alternately threading a pair of strands extending through a pair of threads, forming a separation groove on the outer periphery of each of the threads. Then, while moving the twill tube alternately in each cycle, the twill tube is moved in the axial direction of the twill tube toward the yarn group, and one yarn at the end of the yarn group is engaged with the separation groove. One of the yarns engaged with the separation groove in the opposite direction to separate the one yarn from the other yarn group, and moves along the extending direction of the yarn between the one separated yarn and the yarn group. A method for separating and supplying a yarn, comprising, after inserting the separation claw, moving the separation claw along the yarn to separate the single yarn from the yarn group. 2. The method for separating and supplying a yarn according to claim 1, further comprising the step of: applying a predetermined tension to the upper and lower two places of the separated single thread by means of a thread holding device. It is held so that it can be moved with respect to the yarn gripping device, and thereafter,
A method for separating and supplying a yarn, comprising cutting a yarn separated from an upper side of a yarn gripping device. 3. The method for separating and supplying a yarn according to claim 2, wherein the cut yarn is dragged downward and the vicinity of the cut end of the yarn is gripped by the lower yarn gripping device. Thereafter, the yarn is blown with jet air toward the threading passage of the yarn feeding device, and thereafter, the gripping force of the lower thread gripping device is loosened, and the yarn end is guided to the downstream threading passage. Separation supply method of yarn. 4. A yarn group formed by arranging a large number of yarns in a plane,
In a yarn separation and supply device, a pair of twill braids extending through a pair of twill tubes are staggered alternately, and one yarn is separated and supplied from the group of yarns. Forming a separation groove capable of engaging with the yarn, allowing the twill tube to reciprocate in the axial direction of the twill tube while alternately oscillating in each cycle. An endless rail device is provided in which an adjacent endless rail moves along the yarn from top to bottom, and the endless rail enters between the yarn group and one yarn to separate one yarn from the other yarn group. A separation and supply device for a yarn, comprising a separation claw that is attached. 5. The apparatus for separating and supplying a yarn according to claim 4 , further comprising the step of:
A yarn separation and supply device comprising a pair of yarn gripping devices that are movably gripped with a predetermined pressure. 6. The yarn separating and feeding device according to claim 4, wherein a yarn pulling member inserted between the separated single yarn and the yarn group to shift the yarn to a predetermined position is provided in the yarn gripping device. A yarn separating and feeding device provided adjacently.