JPH05148738A - Cop-exchanging apparatus for loom - Google Patents

Abstract

PURPOSE:To prevent the catch of weft between a new cop and a shuttle and improve the operation rate of a loom by blowing air to a gap between a wooden bobbin of a new cap and a tongue in the mounting of a new cop on a vertical tongue in the exchange of cops. CONSTITUTION:The exchange of cops in a loom holding plural shuttles selectively reciprocating through the opening of warps is carried out as follows. A used cop is exchanged with a new cop after consumption of more than a prescribed amount of weft and the wefts are joined with each other. The used cop is removed from a shuttle 2 and a new cop 32 is mounted on a vertical tongue 18 while blowing air through an air-blowing nozzle 56 to the gap between the new cop 32 and the tongue 18 to prevent the catch of a weft between the new cop 32 and the tongue 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for exchanging a cup formed by winding a weft yarn around a wood pipe mounted on a shuttle flying between warp yarns, and more particularly to an old device in which weft yarns are consumed more than a predetermined amount. The present invention relates to a loom cup changing device for attaching a new cup to a tong for inserting and removing a wood pipe when the cup and a new cup are exchanged.

[0002]

2. Description of the Related Art In a paper machine, for example, a wet paper web is compressed between opposed rolls to remove moisture from the wet paper web. Felt is used. The press felt is made by needling a pad with a web on a base cloth by needling. In the weaving process of the base cloth, the warp yarns are set in the warp beam and continuously supplied, while the weft yarns are supplied by the cup attached to the shuttle.
Therefore, in order to weave the above wide base fabric for press felt, it is necessary to replace the cup every time the shuttle is reciprocated a certain number of times. Also, each time, weft weft of the old cup and weft of the next cup,
For example, the work of joining by welding is also necessary.

As an apparatus for automatically changing the cup and connecting the weft threads, there is an apparatus disclosed in, for example, Japanese Patent Application Laid-Open No. 2-154030 by the same applicant. In this device, a shuttle box for reciprocating the shuttle between the warp threads is arranged on both sides of the warp thread, and a device for pulling out the shuttle from the shuttle receiving chamber of the shuttle box at the time of cup replacement, an old cup weft thread and a new one. The robot is provided with a hand capable of sequentially pulling out the weft yarns of the cup to the yarn knotting device and selectively grasping the wood pipe in order to exchange the old cup and the new cup.

In the above apparatus, the wood pipe is removably attached to the shuttle through a wood pipe insertion / removal tongue which is capable of standing upside down with respect to the shuttle. When replacing the cup, the shuttle is first fixed in place and the robot hand raises the old wood tube and pulls it out of the tongs. Then, with the robot hand, transfer the new wood tube from the stored place,
It is possible to restart the weaving using the new cup by inserting the new cup into the upright tongue by inserting it relatively and putting it down.

However, if the weft threads are unraveled from the new cup, the weft threads will be struck between the base end surface of the new wood tube and the opposite shoulder surface of the tongue when the new wood tube is mounted on the tongs in the upright state. There is a risk of being caught. If the weft thread is caught, not only problems such as cutting the weft thread when inserting the shuttle into the shuttle box after mounting the cup, but also consuming a great deal of time for restoration There was a problem.

[0006]

SUMMARY OF THE INVENTION In view of the above problems of the prior art, the main object of the present invention is to attach a new wood tube to the standing tongs so that the wood tube and the shuttle will be separated from each other. An object of the present invention is to provide a cup changing device for a loom, which can prevent the weft yarn from being caught between them.

[0007]

According to the present invention, the object described above is detachably held so that a cup formed by winding a weft thread around a wooden tube can be erected and laid down through the tongue for inserting and removing the wooden tube. In a loom that selectively reciprocates shuttles between the warp threads, when the weft threads are consumed for more than a predetermined amount, each weft thread is drawn between the consumed old cup and the stored new cup. Pull each other out and tie them together,
A loom cup changing device adapted to remove the old cup from the shuttle and attach the new cup to the tongue in the upright state, when attaching the new cup to the tongue in the upright state. In order to prevent the weft thread from being caught between the new cup wood tube and the tongs, an air blowing means for blowing air toward the new cups and the standing tongs is provided. It is achieved by providing a cup changing device for a loom.

[0008]

In this way, when installing a new cup on the tongs in the upright state in order to replace the new cup with the old cup, the air is directed toward the space between the wood tube and the shuttle of the new cup. Since the weft yarn is blown out, even if there is a weft yarn that is likely to be sandwiched between the two, the weft yarn can be blown off, so that it is possible to prevent the weft yarn from being sandwiched between the new cup wood tube and the shuttle.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. 1 to 4 show an embodiment of a cup changing device according to the present invention which can be used for weaving a base fabric of a press felt for papermaking. A base cloth (not shown) is woven on the left side of FIGS. 1 and 2, but a shuttle box 1 is arranged on the right side of the drawings, and a left side of the base cloth is not shown so as to face the shuttle box 1. There is a shuttle box. In this device, two shuttles 2 are used to weave the base cloth into, for example, two layers, and each shuttle 2 has two shuttle chambers 10a and 10b in the upper and lower stages of the shuttle box 1.
It is hammered out alternately by a hammer device (not shown),
Moreover, by being hit back from the opposing shuttle box, the warp yarns are repeatedly reciprocated in the direction of arrow A in the figure, and the warp yarns 3 are woven by the warp yarns 3 and the base cloth is woven by the operation of the twill and reed not shown. Be done. Both shuttle boxes 1 have shuttle 2
Brake device is also provided. Further, in the present embodiment, the cups are exchanged on the side of the shuttle box 1 on the right side shown with the lower side in FIG. 1 as the front side.

A fixed frame 5 made of a channel material or the like is arranged along the movement direction of the shuttle 2, and a shuttle movable device 7 is provided by a slide rail 6 extending on the fixed frame 5 as shown in FIG. Movable stand 8
Is reciprocally supported. The movable base 8 includes a small air cylinder 11 fixed to a movable bracket 9 also supported by the slide rail 6, and a large air cylinder 12 connected to the movable bracket 9 and fixed to the fixed frame 5. Thus, it is possible to reciprocate in a direction indicated by an arrow B in FIG. 2 with a stroke length of two steps. The shuttle movable device 7 is provided with an arm portion 14 having a suction pad 13 for supporting the tip end portion of the shuttle 2 with a negative pressure, and the arm portion 14 is provided with a pair of rod guides 15 as shown in FIG. Guided reciprocally in the direction indicated by arrow C,
Further, it is driven by the air cylinder 16 in the vertical direction in FIG. A negative pressure generating means (not shown) is connected to the suction pad 13.

A tongue 18 is pivotally attached to the groove 17 in the middle portion of the shuttle 2 so as to be tiltable in the longitudinal direction of the groove 17, and the base end of a wood pipe 21 is detachably held by the tongue 18. A cup 1 formed by winding a weft thread 4 around a wood tube 21.
When the shuttle 2 is flying, it is held in the groove portion 17 sideways in the groove portion 17 as shown by an imaginary line in FIG. 1, and the weft thread 4 is paid out from the shuttle eye on the side surface of the shuttle 2.

After the shuttle 2 flies a predetermined number of times and the weft thread 4 is consumed from the cup 19 for a predetermined number of times or more, the old cup 19 is replaced, but the shuttle 2 is replaced by a shuttle device (not shown). Stop inside Box 1.

As described above, the tip of the shuttle 2 is sucked by the suction pad 13, and the shuttle movably moves to a state shown by the solid line in FIG. The cup 19 is replaced after being pulled out onto the upper surface 23a, but in order to prevent the shuttle 2 from being lifted up at a predetermined position on the support base 23, a fixed air cylinder 22 fixed to a fixed frame (not shown) is provided. Has been done.

As shown in FIG. 1, an articulated robot 24 is fixedly mounted on a common mount 25 arranged on the side of the positioned shuttle 2. At the tip of the arm 26 of the robot 24, as shown in FIGS. 3 and 4, the wood pipe gripping hand 2 capable of gripping the tip of the wood pipe 21.
7 and a weft thread gripping hand 28 capable of gripping the weft thread 4
As shown in FIG. 4, a wood pipe engaging hand 29 that is engageable with the opening at the tip of the wood pipe 21 is provided.

The wood pipe gripping hand 27 has a pair of pawls extending downward in parallel with each other and driven to open and close. The weft thread gripping hand 28 cooperates with the fixed pawl portion and the fixed pawl portion. It is composed of a movable claw that is opened and closed to hold the weft thread 4. Further, the wood pipe engaging hand 29 has a spherical head integrally formed at one end of the support shaft of the movable claw of the weft thread gripping hand 28, and engages with the opening at the tip of the wood pipe 21. It is designed to be compatible.

Further, in the upper right portion of the common mount 25 in FIG. 1, a cup recovery input port 31 of a discharge chute for recovering the old cup 19 is opened.
A cup storage device 33 for storing a new cup 32 to be used next is provided on the right side of. New cup 3
2 is a new weft thread 3 to be combined with an old weft thread 4
4 is wound around a new wood pipe 35 and sequentially set at a predetermined position of the cup storage device 33.

In the lower right part of the common mount 25 in FIG.
A weft yarn threading device 36 for connecting the old weft yarn 4 and the new weft yarn 34 is provided. In the vicinity of the weft thread binding device 36, the weft thread 4 unwound from the old cup 19 mounted on the shuttle 2 is also loaded.
6, a hook 37 for guiding the guide 6 and a hook 38 for similarly guiding the new weft yarn 34 fed from the new cup 32 in the cup storage device 33 are arranged at appropriate positions. .. Also, on the common mount 25,
Use the weft thread 4 fed from the shuttle 2 side to the hook 3
A fixed guide rod 39 for guiding the weft yarn binding device 36 from the side opposite to 7 is provided. Further, the common base 25 is reciprocally movable in the direction of arrow D in FIG. 1 so that the gap between the fixed guide rod 39 and the fixed guide rod 39 can be varied in order to relatively shift the joint between the weft yarn 4 and the new weft yarn 34. A connecting point changing device 41 having a movable guide rod 40, and a clamp device 42 for supporting the tip of the new weft thread 34.
And a residual yarn collecting device 43 for collecting the remainder of the new weft yarn 34 coupled to the weft yarn 4 are arranged at predetermined positions.

As shown in FIGS. 3 and 4, the weft yarn binding device 36 described above has a welding machine 45 which can be moved up and down by a pivot 44 which is erected on the common mount 25, the weft yarn 4, and the new weft yarn 4. A pair of positioning pins 46 for intersecting the weft thread 34 at three points, a weft thread cutting machine 47 for cutting out unnecessary portions of the weft thread after combination, the weft thread 4 after connection and the new weft thread 34 It comprises a hanging machine 48 for hanging from the positioning pin 46. The main body of the welding machine 45 supported in a cantilevered state by the pivot 44 includes a welding horn 49 which is reciprocally movable downward from the lower end surface of the free end portion.
Is provided, and a welding machine anvil 50 is fixedly installed at a position corresponding to the welding horn 49 on the common mount 25, so that the weft thread 4 and the new weft thread 34 hung on both positioning pins 46 are fixed. Welding horn 49 at three intersections
And the anvil 50 sandwiches and welds them together.

In the automatic cup changing device for a loom constructed as described above, the shuttle 2 positioned is positioned.
The new cup 32 in the cup storage device 33 and the respective devices provided on the common mount 25 are arranged within the movable range of the arm 26 of the robot 24. Further, each of the above devices is automatically operated based on a work flow programmed in advance by a control device (not shown) such as a sequencer. As a sensor necessary for the automatic operation, the remaining yarn amount of the weft yarn 4 is detected. Is provided with an optical sensor, and a limit switch or the like is provided at an appropriate position for detecting the breakage of the weft thread 4.

A slack prevention device 51 supported by a fixed frame (not shown) is provided so that the weft thread 4 between the shuttle 2 and the base cloth does not become loose when the weft thread 4 is paid out from the shuttle 2. ing. As shown in FIGS. 2 and 4, the slack prevention device 51 has a fixed ring 52 and a movable hand 53 that can hold the weft thread 4 in the fixed ring 52. Movable hand 53
Is provided at the tip of the rod of the air cylinder 54 via a hand opening / closing actuator 55, and is reciprocally moved in the vertical direction by the air cylinder 54.

Further, as shown in FIG. 5, an air blow-out nozzle 56 as air blow-out means is provided in the vicinity of the cup exchange place of the present apparatus, beside the shuttle 2 at the cup exchange position. Air blowing nozzle 56
Is supplied with compressed air from a compressor (not shown), and compressed air is selectively blown out from the air blowing nozzle 56. Further, the blowing direction of the air blowing nozzle 56 is set so as to blow up the air obliquely downward from the tongue 18 of the shuttle 2 and its surroundings.

Next, an operation procedure when the cup is replaced by this device will be described. First, with the hand 28 for grasping the weft, the tip of the new weft 34 of the new cup 32 in the cup storage device 33 is grasped and pulled out, hung on the hook 38, and then slanted between the positioning pins 46. Clamp device 4
The leading end of the new weft yarn 34 is put into the residual yarn collecting device 43 via 2 and the new weft yarn 34 is set in the state shown in FIG. When the shuttle 2 is flying and weaving, the shuttle movable device 7 is indicated by an imaginary line indicated by an arrow A in FIG. 2 by setting the large air cylinder 12 and the air cylinder 16 in a contracted state. It is in a standby state.

After one shuttle 2 is driven a predetermined number of times, the shuttle 2 is stopped in the shuttle of the shuttle box 1, and the air cylinder 16 is extended and the small air cylinder 11 is contracted. As shown by the imaginary line indicated by the arrow B in FIG. 2, the shuttle launching chamber 1 that has received the shuttle 2 is shown.
The arm portion 14 is inserted into the suction pad 1
3 is engaged with the tip of the shuttle 2. The suction pad 13 is evacuated to suck the tip of the shuttle 2, and the large air cylinder 12 is extended, and the shuttle 2 is moved to the position on the support surface 23a of the support base 23 indicated by the solid line in the figure. Withdraw. Then, the rod of the fixed air cylinder 22 is lowered toward the upper surface of the shuttle 2 from the standby state shown by the imaginary line in the figure, and the shuttle 2 is cooperated with the shuttle movable device 7 to position and fix the shuttle 2.

The upper cup 19 will be described below. The arm 26 of the robot 24 is driven to move the wood pipe engaging hand 29 into the tip of the wood pipe 21 in the shuttle 2 as described above. After the wood pipe 21 is erected while engaging with the opening of the weft, the weft yarn 4 near the cup 19 is pulled out while being grasped by the weft yarn grasping hand 28. The weft thread 4 pulled out from the cup 19 is the fixed guide bar 39 and the movable guide bar 4 of the connecting point varying device 41.
After being hung on 0, the new weft yarns 34 are alternately laid between the positioning pins 46 and further hung on the hanging device 37 to be set in the state shown in FIG. ..

Next, at the three intersections of the weft thread 4 and the new weft thread 34 set in the weft thread binding device 36, the welding machine 4
At 5 the welding horn 49 is lowered, and as described above, the welding horn 49 and the anvil 50 are sandwiched between the welding horn 49 and welding. Thereafter, unnecessary parts of the weft thread 4 and the new weft thread 34 are respectively cut by the weft thread cutting machine 47, and the weft thread 4 and the new weft thread 34 are combined into one. Then, after raising the welding horn 49, the connecting portion of the old and new weft threads 34 and 4 which are unified by the unhooking machine 48 is unhooked from the positioning pin 46.

In this device, the old and new weft 3
When the connecting portions of 4 and 4 are always at the same position, the connecting portions are arranged in the same row of the base cloth, so that the movable guide rods 40 with respect to the fixed guide rods 39 are scattered in order to disperse the bulging portions of the connecting portions. The position is changed appropriately.

After completion of the weft thread joining work, the robot 24
The wood pipe 21 is gripped by the wood pipe gripping hand 28, is pulled out from the tongue 18 of the shuttle 2, and is thrown into the cup collection input port 31. Then, the new wood pipe 35 of the new cup 32 to be used next in the cup storage device 33 is gripped and moved toward the shuttle 2, and the tongs 18 in the upright state are held.
To insert. At this time, the air is blown out from the above-mentioned air blowout port 56 for a predetermined time. Therefore, when the new wood pipe 35 is inserted into the tongs 18, the air is blown, and the new weft thread 34 of the new cup 32 is put into a tensioned state and the new weft thread 34 is placed.
Since the loosening is prevented and the air is blown from below, it is possible to blow up the new weft yarn 34 that is likely to hang downward, so that the base end surface 35a of the new wood pipe 35 can be blown up.
It is possible to preferably prevent the new weft thread 34 from being sandwiched between the shoulder surface 18a of the tongue 18 corresponding to the base end surface 35a.

Then, with the wood pipe engaging hand 29, the new wood pipe 35 is laid down in the groove 17 and set in the same manner as the state shown by the imaginary line in FIG.
Set 2 to the contracted state and return to the standby state. During the cup replacement work, the remaining yarn collecting device 43 collects the cut portion of the new weft yarn 34.

As described above, the shuttle 2 having the new wood pipe 35 mounted therein is returned to the inside of the shuttle box 1 by bringing both air cylinders 11 and 12 into a contracted state, and then the vacuuming is released to release each cylinder. The shuttle movable device 7 is returned to the standby state indicated by the arrow A in FIG. 2 by operating the valves 11, 12 and 16 in the opposite manner. Then, the shuttle 2 is hammered out from the shuttle box 1, and weaving is started. In this device, immediately before this hammering operation, the movable hand 53 of the slack prevention device 51 is raised to the uppermost position in order to remove the weft yarn. , At the same time when the shuttle is launched, the holding state of the weft thread by the movable hand 53 is released. Therefore, when the weaving is resumed, it is possible to automatically prevent the looseness of the weft yarn caused by the cup exchange.

In this embodiment, one air outlet 56 is provided so that air is blown from below toward the tongue 18. However, the number of air outlets is not limited to one, but a plurality of outlets may be provided. good. For example, by providing another air blowout port above the air blowout port 56 of the embodiment, it is possible to further blow air to the new weft yarn 34 in the upper portion of the intermediate portion of the new cup 32.

[0031]

As described above, according to the present invention, when a new cup is mounted on the tongue in the upright state at the time of exchanging the cup, it is possible to prevent the weft thread from being caught between the new wood tube and the shuttle. Therefore, it is possible to eliminate the repair work when such a weft thread is pinched, and it is possible to improve the operation rate.

[Brief description of drawings]

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

FIG. 2 is a front view of the device seen from the line II-II in FIG.

FIG. 3 is a side view of the main part of the apparatus viewed from the line III-III in FIG.

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

FIG. 5 is an enlarged perspective view of an essential part of an air blowing device according to the present invention.

[Explanation of symbols]

 1 Shuttle Box 2 Shuttle 3 Warp Thread 4 Weft Thread 5 Fixed Frame 6 Slide Rail 7 Shuttle Movable Device 8 Movable Stand 9 Movable Brackets 10a, 10b Shuttle Launch Room 11 Small Air Cylinder 12 Large Air Cylinder 13 Suction Pad 14 Arm Part 15 Rod Guide 16 Air Cylinder 17 Shuttle groove 18 Tongue 18a Shoulder surface 19 Cup 21 Wood pipe 22 Fixed air cylinder 23 Support stand 23a Top surface 24 Robot 25 Common mount 26 Arm 27 Wood pipe gripping hand 28 Weft thread gripping hand 29 Wood pipe engaging hand 31 Cup collection input port 32 new cup 33 cup storage device 34 new weft 35 new wood pipe 35a base end face 36 weft yarn splicing device 37/38 hook 39 fixed guide rod 40 movable guide rod 41 connection point Varying device 42 clamping device 43 the residual yarn collecting device 44 Axis 45 welder 46 positioning pins 47 weft cutter 48 hanging off machine 49 welding horn 50 anvil 51 loosening prevention device 52 fixed ring 53 movable hand 54 air cylinder 55 the actuator 56 air blowout nozzle

Claims (1)

[Claims] 1. A loom for selectively reciprocating shuttles between warp yarns, the shuttles holding detachably attached cups formed by winding weft yarns in a wood pipe so that the cups can be erected upside down through the tongues for inserting and removing the wood pipes. In this case, when the weft thread is consumed more than a predetermined amount, the weft threads are pulled out from the old cup that has been consumed and the new cup that has been stored to form a knot, and the old cup is removed from the shuttle. , A loom cup changing device adapted to mount the new cup on the tongs in the upright state, wherein when installing the new cup on the tongs in the upright state, the new cup wood tube and In order to prevent the weft thread from being caught between the tongue and the tongue, air blowing means for blowing air toward the new cup and the upright tongue is provided. Loom cop changing device characterized by there.