JP2603444B2 - Yarning device of the cup changing device for looms - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tying device for a cup changing device for a weaving machine, and more particularly, to changing a cup formed by winding a weft thread on a wooden pipe attached to a shuttle running between warp threads. The present invention relates to a tying device of a cup changing device for a loom for joining a weft consumed by a predetermined amount or more and a weft of a cup to be used next.

[0002]

2. Description of the Related Art For example, in a papermaking machine for papermaking, wet paper is compressed between opposed rolls to remove moisture from the wet paper.
For the roll, a relatively wide endless belt-shaped press felt or the like is used. The press felt,
It is made by planting a bat with a web on a base cloth by needling.

In the process of weaving the base fabric, the warp is set on a warp beam and continuously supplied, while the weft is supplied by a cup mounted on a shuttle.
Therefore, in order to weave the above-described wide base fabric for press felt, it is necessary to replace the cup every time the number of shuttle strokes reaches a certain value. In each case, it is necessary to join the old weft of the old cup with the new weft of the new cup to be used next, for example, by welding.

Heretofore, in the above-mentioned joining of the weft yarns at the time of exchanging the cup, for example, both are tied together, or both are bundled and welded in place. However, when performing the work of tying the yarn by hand, a dedicated worker is required for each loom, and when performing the work by an automatic machine, the weaving cost increases, for example, the equipment becomes complicated. In addition, it can be automated using a welding machine, but when welding is performed in a state where the weft yarns are aligned as described above, it is difficult to specify a welding position, and even if a plurality of positions are welded, a sufficient welding force is always obtained. There was a problem that it could not always be obtained.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, a main object of the present invention is to provide a loom which can easily secure a large binding force by welding between old and new weft yarns and can be easily automated. It is an object of the present invention to provide a tying device for a cup changing device.

[0006]

According to the present invention, there is provided a loom for reciprocatingly flying between a warp and a shuttle, which detachably holds a cup formed by winding a weft on a wooden tube. When exchanging the cups to be used, the yarn of the shuttle of the shuttle and the old and new wefts drawn from the cups to be used next in the cup storage means are joined together by welding. An apparatus for a loom, comprising: a pair of pins that can guide the two weft yarns in a figure eight shape so as to cross each other at three points, and welding means for welding the intersection. This is achieved by providing a tying device for a cup changing device.

[0007]

In this manner, when the old and new weft yarns are welded to each other by the welding means, they are positioned and guided by a pair of pins in a figure of eight which intersects at three points. Because the points are positioned with high precision,
The welding position by the welding means is stabilized, the welding operation can be easily automated, and a large bonding force can be obtained by welding and bonding at three points.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a preferred embodiment of the present invention.

1 to 4 show an embodiment of a cup changing apparatus according to the present invention which can be used for weaving a base fabric of a press felt for papermaking. Although a base cloth (not shown) is woven on the left side of FIGS. 1 and 2, a shuttle box 1 is disposed on the right side of the drawing, and a left side of the base cloth is not shown so as to face the shuttle box 1. A shuttle box is provided. The shuttle 2 is hammered out of the shuttle box 1 by a hammer device (not shown) and bounced back from the opposing shuttle box, so that the warp yarns reciprocately fly between the warp yarns in the direction of arrow A in the figure, and the warp yarns 3 become weft yarns 4. The base fabric is woven using a twill and a reed (not shown). In addition,
Both shuttle boxes 1 are also provided with a brake device for the shuttle 2.

A fixed frame 5 made of a channel material or the like is provided along the direction of movement of the shuttle 2. A shuttle rail 6 extending from the fixed frame 5 as shown in FIG. Movable frame 8
Are reciprocally supported. The movable base 8 includes a small air cylinder 11 fixed to a movable bracket 9 similarly supported on the slide rail 6 and a large air cylinder 12 connected to the movable bracket 9 and fixed to the fixed frame 5. Thereby, it is possible to reciprocate with a two-stage stroke length in the direction indicated by the arrow B in FIG. The shuttle movable device 7 includes an arm 14 having a suction pad 13 for supporting the distal end of the shuttle 2 with a negative pressure.
5 guides reciprocally in the direction indicated by the arrow C in FIG. 2 and is driven by the air cylinder 16 in the vertical direction in FIG. The suction pad 1
Negative pressure generating means (not shown) is connected to 3.

A tongue 18 is pivotally attached to the groove 17 at an intermediate portion of the shuttle 2 so as to be tiltable in the longitudinal direction of the groove 17, and a base end of a wooden tube 21 is detachably held by the tongue 18. Cup 1 formed by winding a weft thread 4 around a wooden tube 21
When the shuttle 2 flies, it is held sideways in the groove 17 as shown by the imaginary line in FIG. 1, and the weft thread 4 is fed from the shuttle eye on the side surface of the shuttle 2. After the shuttle 2 has flew the predetermined number of reciprocations and the weft 4 has been consumed from the cup 19 by a predetermined amount or more, the shuttle 2 stopped in the shuttle box 1 by a brake device (not shown) in order to replace the cup 19, As described above, the distal end of the shuttle 2 is sucked by the suction pad 13, the shuttle movable device is pulled out to the state shown by the solid line in FIG. 2, and the shuttle 2 is placed on the support 23. In order to prevent the rear portion of the shuttle 2 from being lifted at that position, a fixed air cylinder 22 fixed to a fixed frame (not shown) is provided. In the vicinity of the entrance 1a of the shuttle box 1, which is in the vicinity of the flight section 2, the shuttle 2
Is positioned. As shown in FIG. 1, a common gantry 25 disposed on the side of the positioned shuttle 2.
An articulated robot 24 is fixed above. As best shown in FIGS. 5 and 6, the robot 24 has a wooden pipe gripping hand 27 that can grip the tip of the wooden pipe 21, a weft thread gripping hand 28 that can grip the weft thread 4, and FIG. As shown, a wooden pipe engaging hand 29 that can be engaged with the opening at the distal end of the wooden pipe 21 is provided at the distal end of one arm 26.

The wooden pipe gripping hands 27 are fixed to a pair of air cylinders 31 opposed to each other and provided coaxially, and to respective pistons 32, and extend downward in FIG. A pair of arm portions 33 and a pad 34 fixed to a facing surface of a tip portion of each arm portion 33. A return coil spring 35 is provided between the two pistons 32.
The two arms 33 are resiliently returned to the state shown by the solid line in FIG. 6 when not in operation. During operation, the arms 33 are driven in the direction of arrow D in the figure, and the tip of the wooden tube 21 can be clamped by the pads 34 of the arms 33, as indicated by the imaginary line in the figure. The weft grasping hand 28 includes a fixed claw 37 formed at the tip of a fixed hand 36 and a movable hand 38 having a movable claw 39 for holding the weft 4 in cooperation with the fixed claw 37. Become. The movable hand 38 is rotatably supported by a support shaft 40 provided in a slot formed in the fixed hand 36, and the movable claw 39 is moved to an arrow E in FIG.
Is driven by the air cylinder 30 to open and close. The wooden pipe engaging hand 29 has a spherical head 41 integrally formed at one end of a support shaft 40 fixed to the fixed hand 36, and as shown in FIG. 21 can be engaged with the opening at the tip.

A discharge chute 42 for discharging the cup 19 is provided in the upper right portion of the common mount 25 in FIG. 1, and a new cup to be used next is provided on the right side of the common mount 25. Cup storage device 44 for storing 43
Is provided. The new cup 43 is formed by winding a new weft thread 45 to be joined to the old weft thread 4 around a new wooden tube 46, and is sequentially set at a predetermined position of the cup storage device 44.

At the lower right of the common frame 25 in FIG.
A weft binding device 47 for connecting the old weft 4 and the new weft 45 is provided. In addition, the weft binding device 4
In the vicinity of 7, a cup 1 attached to the shuttle 2
A hook 48 for guiding the weft yarn 4 unwound from the hopper 9 toward the weft tying device 47;
4 and a hook 49 for similarly guiding a new weft thread 45 drawn out from the new cup 43 are disposed at appropriate places. Further, on the common frame 25, a guide rod 51 for guiding the weft yarn 4 fed from the shuttle 2 side toward the weft yarn tying device 47 from the side opposite to the hook 48 is provided. . In addition, common stand 2
5 has a movable guide rod 50 that can reciprocate in the direction of arrow F in FIG. 1 so that the distance between the guide rod 51 and the weft thread 4 and the new weft thread 45 can be relatively shifted. A clamping device 53 for supporting the leading end of the new weft yarn 45, and a residual yarn collecting device 54 for collecting the residual of the new weft yarn 45 coupled to the weft yarn 4. Each is provided at a predetermined position.

As shown in FIGS. 3 and 4, the weft tying device 47 includes a welding machine 56 as a welding means which can be moved up and down by a pivot 55 erected on the common base 25. As shown in FIG. 8 and FIG. 9, a pair of positioning pins 58 for passing the old weft yarn 4 and the new weft yarn 45 in an eight-shape crossing each other at three places, and unnecessary weft yarns after the connection are formed. Weft cutting machine 5 for cutting parts
7 and an unscrewing device 59 for unscrewing the combined weft yarn 4 and the new weft yarn 45 from the positioning pins 58. The main body of the welding machine 56 supported in a cantilevered state by the pivot 55 is provided with a welding horn 61 that can reciprocate downward from the lower end surface of the free end and a common base 25.
A welding machine anvil 62 is fixed at a position corresponding to the upper welding horn 61, and as shown in FIG. The three intersections of the weft yarn 45 are welded and connected by being sandwiched by a welding horn 61 and an anvil 62.

The weft cutting machines 57 are provided on both sides of the anvil 62, respectively, and include a fixed blade 63 and a movable blade 64.
An unnecessary portion of the weft yarn 4 and the new weft yarn 45 is cut off by driving the movable blade 64 with an air cylinder or the like (not shown) in the direction shown by the arrow G in FIG. ing. In addition, the unhooking machine 59 includes a pair of parallel arm portions 65 located below the joining portion of the weft yarn 4 and the new weft yarn 45, and an arm portion 65 in order to hang the combined weft yarn off the positioning pin 58.
And an air cylinder 66 fixed in the common gantry 25 so as to drive the air cylinder vertically.

In the automatic cup changing device for a loom constructed as described above, the shuttle 2 is positioned.
The new cup 43 in the cup storage device 44 and the respective devices provided on the common gantry 25 are disposed within the movable range of the arm 26 of the robot 24, respectively. In addition, each of the above-described devices is automatically operated based on a work flow programmed in advance by a control device (not shown) including a sequencer and the like, and a sensor necessary for the automatic operation is used for detecting a remaining amount of weft yarn. Optical sensors are placed in place.

Further, in order to prevent the weft thread 4 between the shuttle 2 and the base cloth from being loosened when the weft thread 4 is fed from the shuttle 2, a slack preventing device 67 supported by a fixed frame (not shown) is provided. ing. As shown in FIGS. 2 and 4, the loosening prevention device 67 includes a fixing ring 68 provided adjacent to the flying portion of the shuttle 2.
And a movable hand 69 capable of holding the weft thread 4 in the fixed ring 68. The movable hand 69 is connected to an air cylinder 70 via a hand opening / closing actuator 71.
And is reciprocated vertically by an air cylinder 70.

The operation of the apparatus will be described below. First, the tip of the new weft thread 45 of the new cup 43 in the cup storage device 44 is pulled out by the weft grasping hand 28 and pulled out, and is hung on the hook 49.
Put the tip of the new weft thread 45 into the residual thread collecting device 54 via the clamp device 53,
The new weft thread 45 is set in the state shown in FIG.

When the shuttle 2 is flying and weaving is being performed, the shuttle movable device 7 causes the large air cylinder 12 and the air cylinder 16 to be in a contracted state, so that the imagination indicated by the arrow A in FIG. It is located in the standby state indicated by the line. After the shuttle 2 has been driven a predetermined number of times, the shuttle 2 is moved to the shuttle box 1.
The arm 14 is stopped in the shuttle box 1 by extending the air cylinder 16 and contracting the small air cylinder 11 as shown by the imaginary line indicated by the arrow B in FIG. The suction pad 13 is inserted to engage the tip of the shuttle 2.
Next, the distal end of the shuttle 2 is sucked by evacuating the inside of the suction pad 13 to form a large air cylinder 12.
Is extended, and the shuttle 2 is pulled out to the position shown by the solid line in the figure. Then, the rod of the fixed air cylinder 22 is lowered toward the upper surface of the shuttle 2 from the standby state indicated by the imaginary line in the figure, and the shuttle 2 is positioned and fixed in cooperation with the shuttle movable device 7. Further, the slack preventing device 67 is operated to lift up to the position of the imaginary line indicated by the arrow C in FIG. 2 to remove the slack of the weft yarn 4 between the shuttle 2 and the base cloth.

Next, the arm 26 of the robot 24 is driven so that the wooden pipe engaging hand 29 is engaged with the opening of the tip of the wooden pipe 21 which is lying down in the shuttle 2 as described above. After standing up, the cup 19
The old weft 4 in the vicinity is pulled out while being held by the weft holding hand 28. The old weft yarn 4 drawn out of the cup 19 is hung on the fixed guide rod 51 and the movable guide rod 50 of the coupling point variable device 52, and then intersects with the crossing of the new weft yarn between the positioning pins 58. 8
, And further hung on a hook 48, and set in the state shown in FIG. The old weft yarn 4 and the new weft yarn 45 set as described above are stretched in a figure of eight having three intersections as shown in FIG. 8, and the position of each intersection is clearly determined. .

Next, the welding horn 61 is lowered by the welding machine 56, and the three points where the old weft yarn 4 and the new weft yarn 45 intersect each other are sandwiched and welded by the welding horn 61 and the anvil 62 as described above. I do. At this time, the position of each intersection is always a fixed position from the above, and welding to each intersection can be surely performed, and since there are three securely welded portions, the both wefts 4.45 Are connected to each other with a sufficiently large connecting force.

Thereafter, unnecessary portions of the weft yarn 4 and the new weft yarn 45 are cut off by the weft cutting machine 57, respectively.
The weft yarn 4 and the new weft yarn 45 are joined together. And
After the welding horn 61 is raised, the union part of the new and old weft yarns 45.4 integrated by the unraveling machine 59 is hooked off the positioning pin 58.

In this apparatus, new and old weft threads 45 are used.
If the connecting portions of 4 are always at the same position, the connecting portions will be arranged in the same row of the base cloth. Therefore, the position of the movable guide bar 50 with respect to the fixed guide bar 51 so as to disperse the swelling portion due to the connecting portion. Is appropriately varied.

After the completion of the weft binding operation, the robot 24
The wooden pipe 21 is gripped by the wooden pipe gripping hand 28 and pulled out of the tongue 18 of the shuttle 2 to remove the discharge chute 4.
Discharge to 2. Then, after grasping the new wooden pipe 46 to be used next in the cup storage device 44 and moving it toward the shuttle 2 and inserting it into the tongue 18, the wooden pipe engaging hand 2
In step 9, the new wooden pipe 46 is laid down in the groove 17 in the same manner as the wooden pipe 21 shown by the imaginary line in FIG. 1, and the fixed air cylinder 22 is contracted to return to the standby state. In addition, during the above-mentioned cup exchange work, new weft 4
An operation of collecting the cut off portion 5 by the remaining yarn collecting device 54 is performed.

After the shuttle 2 having the new wooden pipe 46 attached thereto is returned into the shuttle box 1 by reducing the air cylinders 11 and 12, as shown in FIG.
The evacuation is released, the cylinders 11, 12, and 16 are operated in the reverse of the above-described manner, and the shuttle movable device 7 is returned to the standby state indicated by the arrow A in FIG. Then, the shuttle 2 is driven out of the shuttle box 1 to start weaving. In this apparatus, immediately before this driving operation, the movable hand 69 of the slack preventing device 67 is raised to the highest position in order to take up the slack of the weft. Then, the weft holding state by the movable hand 69 is released simultaneously with the shuttle ejection. Therefore, when the weaving is restarted, the slack of the weft yarn caused by the replacement of the cup can be automatically prevented. According to the present embodiment, the present apparatus is provided only on one shuttle box side, and when the apparatus fails, the conventional manual operation can be performed in an empty space on the other shuttle box side. In addition, devices may be provided on both sides. In this case, it is not necessary to replace the cup only on one side of the running section of the shuttle 2, so that the weft can be efficiently consumed.

[0027]

As described above, according to the present invention, the connection between the old and new weft yarns at the time of exchanging the cup is performed by bridging the two weft yarns between the pair of pins so as to intersect at three points. Since the welding is performed by welding the intersections, the welding position is always a fixed position, so that automation is easy, and since the three welding points are securely connected, the bonding force between both weft yarns is sufficiently large. Thus, such coupling can be achieved with a simple structure, and the coupling device can be automated and reduced in cost.

[Brief description of the drawings]

FIG. 1 is a plan view showing an entire automatic cup changing device for a loom according to the present invention.

FIG. 2 is a front view of the apparatus as viewed from an arrow II line in FIG.

FIG. 3 is a side sectional view of a main part of the device, taken along the line of FIG. 1;

FIG. 4 is a perspective view showing a main part of the apparatus.

FIG. 5 is an enlarged view of a main part showing an arm part of a robot used in the present apparatus.

FIG. 6 is a partial arrow view as seen from the arrow VI line in FIG. 5;

FIG. 7 is a partial arrow view as seen from the arrow VII line in FIG. 5;

FIG. 8 is a plan view of a main part as viewed from the arrow VIII line in FIG. 3;

FIG. 9 is a side view of a main part viewed from line IX-IX in FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Shuttle box 2 ... Shuttle 3 ... Warp yarn 4 ... Weft yarn 19 ... Cup 21 ... Wood tube 24 ... Robot 25 ... Common stand 26 ... Arm 27 ... Wood tube gripping hand 28 ... Weft thread gripping hand 29 ... Wood tube engaging hand 42 ... Ejection Chute 43 New cup 44 Cup storage device 45 New weft yarn 46 New wood tube 47 Weft yarn tying device 48/49 Threading device 50 Moving guide rod 51 Fixed guide rod 52 Bonding point variable device 53 Clamp device 54 ... residual yarn collecting device 55 ... pivot 56 ... welding machine 57 ... weft cutting machine 58 ... positioning pin 59 ... hanging machine 61 ... welding horn 62 ... anvil 63 ... fixed blade 64 ... movable blade 65 ... arm part 66 ... air cylinder

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tokuji Iwasaki 2-11-11-3, Maihama 2, Urayasu-shi, Chiba (72) Inventor Tetsuya Konno 63-2, Higashikawashima-cho, Hodogaya-ku, Yokohama-shi, Kanagawa Prefecture Chiyoda Corporation Hoshikawa dormitory (56) References Jikken 48-2364 (JP, Y1)

Claims (1)

(57) [Claims] When a cup is exchanged in a loom for reciprocatingly moving a shuttle between a warp and a shuttle holding a cup formed by winding a weft thread on a wooden pipe, the shuttle and the cup are stored. Means for joining the new and old weft yarns drawn from the next cup to be used next to each other by welding together, wherein the two weft yarns intersect at three points. A pair of pins that can be guided in a figure 8 shape to each other and welding means for welding the intersections.