FI91001C - Automatic weave spool changer for the weaving machine - Google Patents

Description

i 91001

AUTOMATIC WEAVING COIL CHANGER FOR WEAVING MACHINE

The invention relates to a device as defined in the preamble of claim 1.

5 For example, in paper machines, water is removed from the wet pulp by squeezing it between opposing rollers, and these rollers include spray blankets in the form of a relatively wide endless belt. The press felt is made by mixing wool fibers from 10 layers of support with wool or synthetic fibrous webs needled into the underlay. When weaving the base fabric, the warps are placed in the warp logs and are continuously fed at the same time as the weft is woven by means of a weft spool placed on the shuttle. When weaving such 15 wide base fabrics into a press fabric, the weft spool must be replaced each time the shuttle has traveled back and forth from patch to a certain amount of time. In addition, at the same time, the weft of the old weft coil can be combined with the weft of the new weft coil.

It is already known, for example, from US 3,608,589 and FI 882861 to join wefts by knitting together. The problem with the prior art is that the bonding process is in itself complex, and a very complex mechanism is needed to automate the weaving process. Furthermore, the knotted knots give the base fabric an unfavorable unattainable surface pattern, and the knots must be opened after the fabric has been woven, as suggested in FI-882861 (p. 23, pp. 25-30). 30 Without competition, this requires a considerable amount of work on the part of the user. and any failure to open the knots will result in an uneven surface on the base fabric.

The object of the invention is to eliminate the above-mentioned drawbacks.

The device according to the invention is characterized by what is stated in claim 1.

2

The automatic weft spool changer according to the invention for a weaving machine, in which a shuttle carrying a weft spool comprising a spool around which the weft is wound back and forth between warps 5 so that the weft is woven between the warps, comprises: a weft spool device the reciprocating motion of the reciprocating motion when the tissue of the drive spool mounted on the shuttle has been used in excess of a predetermined amount; weft spool va-10 raster to store a plurality of new weft spools; weft connector; and a device to replace the drive side with one of the new weft sides. According to the invention, the weft connecting device comprises: a weft cross-setting device comprising a table and a pair of setting pins extending upwards from the table; a weft pulling device to pull the weft from the spool, to convey the weft from the spool through the different sides of the setting pins, to pull the weft from the new weft, and to place the weft from the new weft crosswise from the weft taken from the spool 20 from different points; weft welding apparatus for welding cross-linked parts of wefts; weft finisher for finishing additional parts of welded wefts; and a weft spool replacement device to remove the use spool from the shuttle and insert a new weft spool into the shuttle.

By placing the shuttle, pulling the weft out of a weft spool that has been used more than a predetermined number of times, tying it to one weft in the next weft spool stored in the storage unit and replacing the weft coil continuous presence near the weaving machine. The ends of the Ku-35 roads are thus welded together and placed crosswise before welding. As a result, the two ends of the weft are welded together at three points. The welding machine 91001 3 can be based on an ultrasonic, high-frequency or other soldering unit. The advantage of welding the wefts is that the produced substrate is given a flat surface and no opening process is required, since the two wefts 5 are simply placed side by side at each welded point, and no mop or knot is created at the point to be welded. In addition, welding is much more suitable for automation than the known technique. Furthermore, by placing the wefts crosswise before welding together, a reliable welding result can be achieved at each welding point. This substantially increases the mechanical strength of each welded point. In addition, the present invention allows a good welding result to be achieved and the welding process to be automated without unduly complicating the structure.

In one embodiment of the device, the weft drawing device includes a welding point variation device to change the welding point by changing the length of the weft between the welding points of the wefts and the drive spool. When the fabric to be woven consists of a press fabric for removing water from the paper web in the papermaking process, it is important to apply the weld points of the weft to the entire area of the fabric in order to avoid defects in the paper to be produced.

25 In one embodiment of the apparatus, the welding point variation device comprises a fixed rod extending upward from the table, a movable rod extending upward from the table so that it can be moved outward and toward the fixed rod to vary the welding point relative to the welding point. inside the table to remove the weft from them.

In one embodiment of the device, the automatic weft spool changer further comprises a wiper device for removing welded wefts from a set pin, the wiper device comprising an arm normally located below the weld points of the wefts, 4 and a cylinder device for moving the arm vertically.

In one embodiment of the apparatus, the weft finishing apparatus comprises two cutter blades located on each side of the anvil of the weft welding apparatus, and a cylinder device for operating the cutters to cut the excess portions of the wefts.

The invention will now be described by means of specific embodiments thereof with reference to the accompanying drawings, in which Figure 1 is a general plan view of an automatic weft reel changer according to the invention, Figure 2 is a front view of Figure 1 along line II-II, Figure 3 is a side view of a substantial part of Figure 15 the line III-III, figure 4 is a perspective view of an essential portion of the apparatus, figure 5 is an enlarged, showing the essential part of the image for robot's arm portion 20 figure 6 is a påatykuva viewed in the direction of arrow VI of figure 5, figure 7 is a paåtykuva viewed in the direction of arrow VII of figure 5, figure 8 is a plan view seen from an arrow VIII direction of 25 in figure 3 and figure 9 is a side view of an essential portion of figure 8 along the line IX-IX.

Figures 1-4 show a weft spool changer according to the invention which can be used for weaving a backing fabric for a press felt used in paper machines. The underlay web is woven on the left side of the devices of Figures 1 and 2 and the shuttle box pairs are located on both sides of this arrangement, although only the shuttle box 1 on the right side of the device is shown. The shuttle 2 is shot by the spindle draw-from Table 1 vasarayksikolla, which is not shown piirus-tuksessa, and is shot back from the second sukkulalaati- li 91001 5 avenge such that the base fabric can be woven kåyttåmållå handrail and niisikonetta shuttle 2 passing back and forth in the direction of arrow A in the warps 3 vålisså to weave a weft 4 between 3 warps. The shuttle boxes 1 are equipped with jar-5 iron units for the shuttle 2. Each shuttle box 1 may contain several shuttles with different wefts so that they can be used alternatively to obtain the desired properties of the woven fabric.

10 of the fixed frame 5 consisting of kanavaelimestå is positioned in the shuttle 2 the path of movement direction and the movable base 8 of the shuttle asetusyksikkoå 7 closets is slidably supported by the slide rail 6 extending kiinteåsså body 5, as esitettynå in Figure 2. The movable support 8 can be 15 moved in the direction of arrow B in Figure 2 in the direction of two kinds, the public impact, as described below, by a small air cylinder 11 connected to a movable support 8 at its free end and fixedly attached to a movable support 9 which rests on a slide rail 6 20 in the same way as a movable support 8 at its end and a large air cylinder 9 connected to a support 9 free-end and fixedly fixed to the fixed body 5 at its end. The shuttle setting unit 7 supported by the movable support 8 controls the arm portion 25 of the arm-25, which supports the suction pad 13 at its free end to engage the front end of the shuttle 2 with vacuum so that it can be moved horizontally as indicated by arrow C in Fig. 2. vertical-30 sa in Figure 2. The suction pad 13 is connected to a vacuum pump tree not shown in the figure.

The groove 17 in the central part of the shuttle 2 receives a wooden spool 21 detachably fitted at one end of the tongue 18. The tongue 18 rests articulated 35 on the shuttle 2 at the end of the groove 17 so as to allow the wood spool 21 to pivot in and out of the groove 17. The weft spool 19 consisting of this wooden spool 21, 6 around which the weft 4 is wound is held as shown by the dashed lines in Fig. 1 during the passage of the shuttle 2 and the weft 4 unwound from the spool 19 is fed out of the eye of the shuttle 5 located on one side of the shuttle 2.

After the shuttle 2 has traveled back and forth a certain number of times and the weft 4 in Poland 19 has been used a certain amount, the shuttle setting unit 7 pulls 10 the shuttle 2 which has arrived at the end point of its reciprocating movement and which remains in place in the shuttle box 1 not shown in the drawing, the position indicated by the solid lines in Fig. 2 by gripping the front end of the shuttle 2 by suction and the shuttle 2 being placed on the support base 23 so that the spool 19 or the drive spool 19 can be replaced as described herein. In order to prevent the rear end of the shuttle 2 from rising from this position, a securing air cylinder 22 is mounted on a part of the fixed body not shown in the drawing. The shuttle 2 is thus located next to the opening 1a of the shuttle box 2, the box being located at the outer end of the path of the shuttle 2 when the weft coil is changed.

As shown in Figure 1, the multi-arm robot 24 is housed in a common head 25 located on one side of the shuttle 2 placed here. As shown in Figures 5 and 6, the robot 24 is provided at its free end 26 with a wooden spool gripper 27. which vox grips the free end of the wood spool 21, a weft gripping arm 28 which can grip 30 the weft 4 and a wood spool coupling arm 29 which can engage an opening in the free end of the wood spool, as shown in Figure 7.

The gripping arm 27 of the wood spool comprises two air cylinders 31 coaxially and opposite to each other, two arm parts 33, both of which are fixed to the pistons 32 of the respective air cylinders 31 and extend downwards parallel to each other.

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91001 7 as shown in Figure 6, and pads 34 attached to opposite surfaces of the free ends of the arm portions 33. The return spring 35 is disposed Mån-road 34 in the election resiliently pushed by the arm portions 33 of five poispåin between a non-active state, such as pre-tettynå in full lines in Figure 6 in active mode, the two arm parts kåytetaån arrow D direction indicated in Figure 6 and can grip 21 free of wood processing capabilities pååhån pads 34, as shown with dashed butter-10 in Figure 6.

The weft gripping arm 28 includes a fixed latch 37 formed on the free end of the fixed arm 36 and a movable arm 38 having a movable latch 39. The movable arm 38 rotatably rests on a pivot shaft 15 40 extending across a slot in the fixed arm 36 and the movable latch 39 can be closed and opened by air. the arrow E direction. The wooden spool in connection with the shaft 29 is provided with a spherical ball 41 fixedly formed at one end of the articulated shaft 40 with the shaft fixed to the fixed shaft 36 and may communicate with an opening in the free end of the wood spool 21, as shown in Figure 7.

An outlet 42 is provided in the upper right corner of the common table 25, as can be seen in Figure 1, 25 to remove used weft spools 19, and a weft side storage unit 44 is located on the right side of the common table 25 to store new weft spools 43 to be used. Each of the new weft sides 43 includes a new wooden spool 46 surrounded by a new weft 45 45 which will be joined to the old weft and stored in a suitable location in the weft side storage unit 44.

In Fig. 1, in the right lower corner of the common bed 25, there is a weft binding unit 47 to connect 35 old weft 4 to a new weft 45. Next to this weft binding unit is a hook 48 to guide the weft 8 4 taken out of the weft spool 19 placed in the shackle 2 to the weft binding unit 47 to guide the weft spool to the storage unit 44 a new weft 45 extracted from the stolen new weft spool 43. Likewise, the common table 25 includes a guide rod 51 5 to guide the weft 4 extracted from the shuttle 2 to the weft binding unit 47 on opposite sides of the hooks 48 and 49. In addition to the common table 25 is, each fit-intermediate site, lashing vaihteluyksikko 52, wherein a movable control rod 50, which can move 10 TAA direction of arrow F in Figure 1 in either direction to change its position with respect to the control rod 51, so that the old weft 4 and the new weft The binding points 45 can be interchanged, the gripping unit 53 to support the free weave of the new weft 45 and the finished weft finishing unit 54 to finish the additional parts of the new weft 45 tied to the weft 4.

The aforementioned weft bonding unit 47 consists of an ultrasonic or high frequency welding machine 56, 20 which can move vertically on a support shaft 55 mounted vertically on a common table 25, as best seen in Figures 3 and 4, a pair of adjusting pins 58 to cross the weft 4 and a new weft , as best seen in Figures 8 and 9, I weave the finishers 57 to remove the used weft spool from the drive weft and finish the excess weft after it is bound and removed 59 to remove the weft 4 and new weft 45 from the setting pins 58 is bound together into a single weft. The main body of the welding machine 56, which rests on the support shaft 55 cantilevered, is provided with a welding horn 61 which can be moved downwards and upwards from the lower end surface of the main body and the anvil 62 that the three intersecting points of the weft 4 and the new weft 45 intersect in the setting pins can be placed in the welding horn 61

II

91001 9 and between the anvil 62 to weld the wefts together.

The weft finishers 57 are arranged on both sides of the anvil 62 and both of them are formed as a cutter with a fixed blade 63 and a moving blade 64 so that the old weft spool 19 can be separated from the use weft 4 or the excess weft 45 of the new weft spool 46 can be finished. , as may occur kåyttåmållå rolling teråå 64 of the arrow-G direction of the mouth of Figure 9 ilmasylinterillå or the like, which 10 is not shown in the drawings. The remover 59 includes two parallel shank portions 65 located below the binding points of the weft 4 and the new weft 45 to remove the combined weft from the setting pins 58 after it is bound and the air cylinder 66 attached to the common table 25 vertically moves the shank portions 65.

According to the automatic weft spool changer described above, the shuttle 2, which is held in place at the specified location, the new weft spools 43 stacked-20 fed to the weft spool storage unit 44 and the aforementioned units located in a common head 25 are located within the robot 26 arm 26 movement area.

The above units are automatically activated according to the progress of the operation, which is programmed into a weather unit not shown in the drawings and an optical sensor to detect the amount of weft remaining in the weft coil and a limit switch to detect weft 4 rupture are arranged in suitable locations. agricultural activities.

The anti-slip device 67 is disposed on a fixed body, not shown in the drawing, to prevent slack in the weft 4 in the portion extending between the base fabric and the shuttle 2 when the weft 4 is taken out of the shuttle 35 2. This anti-loose device 67 is provided with a fixed ring 69 4 inside the fixed ring 68, as illustrated in Figures 10 and 4. The gripper 69 is connected to the free end of the piston rod of the air cylinder 70 via an actuator 71 to open and close the gripper 69 so that it can be conveyed vertically to both air cylinders 70.

The following describes the operation of the device described above.

First, the free head of the 10 new wefts 45 taken out of the new weft spool 43 stored in the weft spool storage unit 44 is gripped and pulled out of the weft by the gripping arm 28 and taken onto the hook 49. The new weft 45 is then passed through the insertion pins 58 in a zigzag manner. to the tuned weft finishing unit 15 at the gripping unit 53, the new weft 45 being in the position shown in FIG.

As the shuttle 2 moves, the shuttle setting unit 7 keeps the air cylinder 16 in the retracted position and remains in the waiting state with the small air cylinder 11 in the extended position and the large air cylinder 12 in the retracted state, as indicated by arrow X in Fig. 2.

After the shuttle 2 has reciprocated a predetermined number of times, the shuttle is held in place by the shuttle-25 in the slot 1 and the air cylinder 16 is extended while the small air cylinder 11 is held in the extended position and the large air cylinder 12 is held in the outlet space. Thereafter, the small air cylinder 11 30 is retracted so that the suction pad 13 engages the free end of the shuttle 2 as shown by the arrow Y in Fig. 2 and the shuttle 2 is pulled out to the position indicated by the solid lines in 11 and 12. Thereafter, the piston rod of the securing air cylinder 22 is lowered from its waiting position shown in broken lines in Fig. 2.

II

91001 11 on the upper surface of the shuttle 2 by locating and securing the shuttle 2 against the support base 23. Tåmån after the loose-poistoyksikko 67 is activated and the gripper 69 pushed out of the position shown in the direction of arrow Z to remove slack in the weft 4 5 be interline portion extending from the shuttle 2 and the vessel fabric electoral law.

Thereafter, the arm 26 of the robot 24 is activated by lifting the wooden spool 21 by gripping the free end opening 10 of the wooden spool 21 on the shuttle 2 with the wooden spool gripping arm 29 and pulling out the portion of the weft 4 adjacent to the weft spool 19 by grasping and pulling it. with weft infection arm 28.

The weft 4 pulled out of the weft spool 19 is hooked around the fixed guide rod 51 and the movable guide rod 50 of the transfer point 52 transfer unit 52, passing through the setting pins 58, and then hooked onto the hook 48, the weft being as shown in FIG.

Thereafter, the welding horn 61 is lowered to weld the three overlapping portions 20 of the weft and the new weft 45, positioned as shown in Fig. 8, by pressing them against the anvil 62. Thereafter, the old weft coil 19 is removed from the weft 4 and the new weft coil 43 is finished. with a puncher 57 to complete the joining of weft 4 and a new 25 weft 45 into one continuous weft. When the welding horn 61 is raised, the interconnected parts of the old weft 4 and the new weft 45 are removed from the setting pins 58 by a remover 59.

Since the binding points 30 of the new and old wefts would be in the same row on the base fabric if bound at regular intervals, the device on the kMs alternately shifts the movable guide rods 50 relative to the fixed guide rod 51 so that the nodes generated at the female binding points spread throughout the base 35.

Upon completion of the weft bonding process, the wooden spool 21 is pulled out of the shuttle 2 tongue 18 12 by gripping the wooden spool 21 by the wooden spool gripping arm 28 of the robot 24 and is moved out to the outlet 42. Thereafter, the wooden spool gripping arm 28 in the storage unit 44 and transferred to the shuttle 2, where the wood spool 46 is fitted to the tongue 18 and placed inside the groove 17 in the same way as the wood spool 21 shown in broken lines in Fig. 1, completing it for the next weaving process. 10, the securing air cylinder 22 is then retracted to its retracted position. After the weft spool is replaced, the finished portion of the new weft 45 is finished in the finished weft finishing unit 54.

When the shuttle 2 carrying the new wooden spool 46 is stored in the shuttle box 1 by retracting the air cylinders 11 and 12, the vacuum is released and the movements of the cylinders 11, 12 and 16 are made backwards to bring the shuttle setting unit 7 to the waiting position indicated by arrow X in Fig. 2. According to this embodiment, immediately before being moved from the shuttle box 1 to start the weaving process, the gripper 69 of the loosening unit 67 is raised to its highest position to remove loose from the weft and the grip of the gripper 69 from the weft is released at the same time as the shuttle is fired. Thus, the loosening of the weft due to the change of the weft spool can be automatically removed as the weaving process is continued. Thus, strong abrupt tightening of the weft 4, which could break the weft, is avoided.

According to the present application, the device according to the invention is provided with only one shuttle box, and in the event of a device failure, the tissue sides can be changed manually in a conventional manner from another shuttle box with sufficient space. Alternatively, such devices can be placed on both sides of the machine, allowing the weft spools to be replaced on both sides, allowing the weft to be used more efficiently.

According to Tate's invention, since the process includes several steps such as shuttle insertion, weft tying, and weft side change can be done automatically without manual operations, weft side change during weaving can be done automatically and the cost of the weaving process can be significantly reduced. Also, since multiple functions can be performed with a single robotic arm, the tissue spool changer 10 can be simplified and made compact.

Claims (5)

14 An automatic weft spool changer for a Kuto machine, in which a shuttle (2) carrying the weft spool (19), comprising a spool (21) around which the weft (4) is wound, travels back and forth between the warps (3) so that the weft becomes woven into a warp selection, the apparatus comprising: a weft spool setting device (13, 14, 22) for holding the 10 shuttles (2) in place near the reciprocating motion of the reciprocating motion when the weft (4) of the drive spool (19) mounted on the shuttle is used to determine the front cover; a weft spool storage device (44) for storing a plurality of new weft spools (43); weft ballast? and a device for replacing the drive spool (19) with one of the new weft sides (43), characterized in that the weft connecting device comprises: a weft cross-setting device comprising a table (25) and a pair of setting pins (58) extending upward from the table; a weft pulling device (24, 26, 28) for pulling the weft (4) from the drive spool (19), conveying the weft from the drive-25 spool through different sides of the setting pins (58), pulling the weft from the new weft spool (43), and inserting the weft from the new weft spool (45) (19) crosswise with the taken weft (4) from three points by placing 30 wefts (45) taken from the new weft spool (43) through different sides of the setting pins (58); a weft welding device (47) for welding cross-arranged portions of the wefts (4, 45); a weft finishing device (57) for finishing additional parts of the welded wefts; and 35 a weft spool changer (24, 26, 27, 29) to remove the drive spool (19) from the shuttle (2) and insert a new weft spool (43) into the shuttle. 91001 15 An automatic weft spool changer according to claim 1, characterized in that the weft pulling device comprises a welding point variation device (52) for casting the welding point by changing the length of the weft between the weft welding points and the use spool. Automatic weft spool changer according to claim 2, characterized in that the welding point variation device (52) comprises a fixed rod (51) extending upwards from 10 tables (25), a movable rod (50) extending upwards from the table so that it can be moved outwards and towards a fixed rod for varying the welding points relative to the weft spool at said extremity, and a device for pulling the rods (50, 51) into the table (25) to remove the weft therefrom. Automatic weft spool changer according to one of Claims 1 to 3, characterized in that the automatic weft spool changer 20 further comprises a removal device (59) for removing welded wefts from a set pin (58), the removal device comprising an arm (65) normally located below the weft welding points. and a cylinder device (66) for moving the arm vertically. Automatic weft spool changer according to one of Claims 1 to 4, characterized in that the weft finishing device (57) comprises two pairs of cutter blades (63, 64) arranged on each side of the anvil of the weft welding device and a cylinder device for operating cutters in excess of the wefts. 16