JPH0146611B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for automatically winding ends of roving yarn onto empty bobbins whose tubes have been changed by a tube changer installed at the front of the roving frame in a roving frame using an upper-support type flyer. Conventionally, when changing the tube of a roving frame, a full bobbin is manually removed from the bobbin rail support, an empty bobbin is supplied, and then the bobbin rail is returned from the tube changing position to the starting position, and then the bobbin is removed from the end of the presser. The roving machine was started after the hanging ends of the rovings were manually wound one by one onto the latching belt of the empty bobbin, which lengthened the tube change time and reduced the operating efficiency of the roving machine. . If the roving machine is operated with a failure in the bobbin winding operation at the end of the roving, the roving sent out from the front roller is not wound onto the bobbin, and the roving between the front roller and the top rail is cut.
When this roving breaks, it is necessary to send out a predetermined length of roving from the front roller, pass the roving through the flyer leg, and wind the roving end around the bobbin, which is a tedious manual process, even if only one roving breaks. Even if this occurs, the operation of all the spindles of the roving machine will be stopped for a long time.
To automate the work of winding the ends of roving
-11180, Japanese Patent Publication No. 44-20253, Japanese Patent Publication No. 44-32612 A method of automatically winding the roving end by providing an auxiliary device for winding the roving end, such as a roving end holder, near the empty bobbin. , devices have been proposed, but not only do they require an auxiliary device to hold the roving end, but they also lack reliability in winding the roving end, leading to the aforementioned roving breakage, so they have not been put into practical use. The current situation is that there is no such thing. Furthermore, in US Pat. No. 3,380,238, after an empty bobbin is placed on a bobbin support plug on a bobbin rail by an empty bobbin supply arm, the empty bobbin supply arm is positioned outside the bobbin rail lifting trajectory, and then the bobbin rail is moved to a predetermined position. It is disclosed that the roving machine is raised to the winding start position and the roving machine is started, whereby the presser of the flyer comes into pressure contact with the friction band around the outer periphery of the empty bobbin and winds the end of the roving. According to this, since the pin of the bobbin support plug stops at a different position each time it stops, the locking groove of some of the empty bobbins placed on the bobbin support plug does not engage the bobbin support plug. This results in a so-called incomplete attachment state. It is expected that such an incompletely installed empty bobbin will fall under its own weight when the bobbin support plug rotates and the locking groove faces the pin, and will be fully installed by engaging. With this method, which relies only on its own weight, it is not certain that an incompletely loaded empty bobbin can be fully loaded quickly, and as a result, an incompletely loaded empty bobbin has a longer delay in winding the roving than a fully loaded one from the beginning. There was a risk that the roving would become slack and that normal winding would not be possible. In view of the current situation, the present invention provides a method for automatically winding ends of roving yarns all at once on empty bobbins whose tubes are automatically changed all at the same time by a tube changer installed at the front of a roving frame. The aim is to complete the automation of tube change and roving end winding in the roving frame, increase the operating efficiency of the roving frame, and save labor. The embodiments shown in the drawings will be described below.
Reference numeral 1 designates a roving frame, on which a top rail 2 suspends a large number of top-supported flyers 3, and the flyers 3 are operated at high speed via drive shafts and gears built into the top rail. Reference numeral 6 denotes a bobbin rail that moves up and down to form a roving bobbin, and a support body 7 is rotated at high speed via a drive shaft and gears. The lower hole 5a of the bobbin 5 (empty bobbin) fits into the cylindrical protrusion 7a of the support 7, and the locking groove 5b (6 to 8
The equally divided grooves) engage with locking protrusions 8 implanted in the support, and the upper hole 5e of the bobbin 5 is connected to the flyer leg 3.
a, the bobbin 5 is rotated at high speed together with the support 7. An upper collar 5c is formed at the upper end of the bobbin 5 to be captured by a tube switching arm having a forked tip, and a lower collar 5d for pushing up the tube switching arm is provided at the lower end. In FIG. 1, the bobbin 5 is fitted into the projection 7a of the support 7, but the locking groove 5b is not fitted into the locking projection 8, and the lower surface of the bobbin rests on the locking projection 8. Both the so-called incompletely installed bobbin (FIGS. 3 and 4) and the completely installed bobbin which is also fitted in the locking projection 8 are arranged so that the locking band 9 faces the presser eye 4a through which the roving of the presser 4 is passed. A wide strap 9 having numerous resilient projections is attached to the outer periphery of the bobbin 5. 10 is a tube changer provided on the front side of the roving frame 1. A sliding shaft 13 is connected to the rear lower part of the tube changer 10 via a lifting motor 11 and a gear 12, and reciprocates in the longitudinal direction of the tube changer 10 as the lifting motor 11 rotates forward and backward. is installed over the entire length of the pipe exchanger 10 with its rotation restricted, and several connectors 14 are fixed to the sliding shaft 13 at appropriate intervals in the axial direction, each of which The lower ends of drive links 15 are each pivotally supported by the connector 14, and one end of a driven link 16, which is half the length of the drive link, is connected to the center of each drive link 15 with a pin,
The other end of the driven link 16 is pivotally supported by another connecting member 17 fixed to the lower part of the machine frame to constitute an elevating mechanism 19 consisting of several sets of so-called Scott Stratsell type strict linear movement mechanisms 18, and Pipe exchange heads 21, which will be described later, are fixedly supported in the horizontal direction by several sets of receivers 20 connected by pins to the upper ends of each drive link 15 of the mechanism 19, respectively. Therefore, the pipe exchange head 21 connected to this lifting mechanism 19
is vertically moved up and down via a sliding shaft 13 that reciprocates by forward and reverse rotation of the up and down motor 11 and several sets of Scots-Trussell type strict linear movement mechanisms 18. This elevating movement is controlled by controlling the rotation of the elevating motor 11 using a plurality of limit switches (not shown). The pipe switching head 21, which is connected to the lifting mechanism 19 and supported in the horizontal direction and extends over the entire length of the pipe switching machine 10, has a front and rear motor 22 fixedly attached to its end.
The sliding shaft 24, which is connected to the main body via a gear 23 and reciprocates in the longitudinal direction of the tube changing head 21 by forward and reverse rotation of the front and rear motor 22, is restricted from rotating and rotates along the entire length of the tube changing head 21. It is mounted across the
Several connectors 25 are fixed to the sliding shaft 24 at appropriate intervals in the axial direction, the rear ends of the drive links 26 are pivoted to each of the connectors 25, and the center of each drive link 26 is One end of a driven link 27, which is half the length of the driving link, is connected with a pin, and the other end of the driven link 27 is pivotally supported by another connector 28 fixed to the pipe change head 21. A longitudinal movement mechanism 30 consisting of a pair of so-called Skott-Ratssel type strict linear movement mechanisms 29 is installed in the horizontal direction, and the longitudinal movement mechanism 30 further includes a drive link 2.
A connecting rod 31 extending over the entire length of the tube changing head 21 is connected with a pin to the front end of the tube changing head 21, and two types of tube changing arms 32A, long and short, projecting horizontally toward the roving machine side at the front of the connecting rod 31. 32B are connected with pins so as to be able to swing upward from a horizontal position, and are arranged alternately to maintain them at pitches corresponding to the bobbin pitches P of the roving frame 1. The pipe switching head 21 is positioned in the longitudinal direction so as to correspond to the pipe switching arms 32A, 32B.
The front end portion is formed into a fork shape so that the bobbin 5 can be suspended via the upper collar 5c.
Incidentally, a torsion spring may be interposed in the pivot portion of the tube exchange arms 32A, 32B so as to bias the tips of the tube exchange arms downward. Therefore, the tube exchange arm 3 connected to this back and forth movement mechanism 30 via the connecting rod 31
2A and 32B move back and forth in the horizontal direction via a sliding shaft 24 that reciprocates by forward and reverse rotation of the front and rear motor 22 and several Scott-Ratssel type strict linear motion mechanisms 29. Further, the control of this longitudinal movement is performed by controlling the rotation of the longitudinal motor 22 using a plurality of limit switches (not shown). Further, a peg conveyor 34 is installed at the lower part of the tube changer 10, extending along its entire length and rotated in the longitudinal direction by a drive motor 33. Two front and rear rows of pegs 36A and 36B, in which pegs 35 are arranged at pitches corresponding to P, are arranged in parallel at the same spacing as the front and rear row spacing of the flyer 3 of the roving frame, and a full bobbin 5B and an empty bobbin for one roving frame are arranged in parallel. 5A
can be placed at the same time. Further, this peg conveyor 34 circulates continuously or intermittently to discharge full bobbins 5B and supply empty bobbins 5A. 31
The reciprocating motion of the peg is made by one pitch in response to a command from a limit switch (not shown) which is activated by the following. While the roving frame is in operation, the tube changing head 21 is raised to the highest position, and the pegs 35 of the peg conveyor 34 are removed.
The tube changer 10 is waiting with one empty bobbin 5A attached to it. When the roving frame 1 reaches full capacity and stops, the bobbin rail 6 descends from the winding position to the tube changing position. (Position of imaginary line in FIG. 1) At this time, the roving between the presser eye 4a and the full bobbin 5B inevitably breaks due to the increased distance, and the roving end hangs down from the presser eye 4a. Next, the tube exchange arms 32A and 32B move forward, and at their forward ends, the two prongs at the tip end with the full bobbin 5.
Insert it under the upper collar 5c of B. Next, the bobbin rail 6 descends again, and the full bobbin 5B comes off the flyer leg 3a and is captured by the tube switching arms 32A, 32B, and then detaches from the support 7 and moves to the bobbin rail 6.
stops at the lowest position. The tube exchange arms 32A and 32B that have captured the full bobbin 5B are moved backward, and during the retreat, the peg conveyor 34 is moved by one pitch in synchronization with the backward movement, and the peg conveyor 34 is moved by one pitch.
After passing the full bobbin 5B between the empty bobbins 5A attached to the peg conveyor 3 and transporting it above the empty peg 35, the pipe changing arms 32A and 32B are lowered to the peg conveyor 3.
Attach it to the empty peg 35 of No. 4. Next, the tube exchange arm 32
A, 32B are moved back to separate the forked portion at the tip from the full bobbin 5B, and then the peg conveyor 34 is moved one pitch in the opposite direction to the above, so that the empty bobbin 5A corresponds to the tube exchange arms 32A, 32B. Then, the tube exchange arm 3 performs the doffing operation and the reverse return operation of the full tube 5B.
2A, 32B, the empty bobbin 5A on the peg conveyor 34 is captured by the tube changing arms 32A, 32B, and carried above the support 7 of the bobbin rail 6. At this time, the tube exchange arms 32A, 32B are at the forward end position. When the bobbin rail 6 is raised from the lowest position to the first winding position while holding the tube changing arms 32A, 32B at the forward end position, the cylindrical protrusion 7a of the support body 7 is inserted into the lower hole 5a of the empty bobbin 5A. When inserted, the empty bobbin 5A is pushed up, its upper hole 5c is also inserted into the flyer leg 3a, and the bobbin rail 6 is stopped at the starting position. (Situation shown in Fig. 1) Since the empty bobbins 5A attached to the pegs 35 of the peg conveyor 34 are only inserted into the pegs at random, the support body 7 is locked in the locking groove 5d while the bobbin rail 6 is rising. There are cases where the protrusion 8 is completely fitted, and cases where the empty bobbin 5A is incompletely fitted, with the bottom surface of the empty bobbin 5A resting on the locking protrusion 8. For incompletely installed empty bobbins, the height of the locking protrusion 8 is H.
Therefore, just before the bobbin rail 6 stops at the first winding position, the lower collar 5d of the empty bobbin 5A pushes up the tube switching arms 32A, 32B, and when the bobbin rail 6 stops at the first winding position. The empty bobbin 5A is pressed against the support body 7 by the weight of the tube switching arms 32A, 32B or the restoring force of the spring acting on the empty bobbin 5A. At this first winding position, the latches 9 of both the fully loaded and incompletely loaded bobbins face the presser eye 4a. (FIG. 4) When the roving frame 1 is started in this state, the support body 7 and the flyer 3 rotate, and the completely installed empty bobbin 5A rotates together with the support body 7. The incompletely installed empty bobbin 5A is attached to the tube exchange arm 32 as described above.
A and 32B press against the support 7, so when the locking protrusion 8 of the support 7 rotates to the position where it matches the locking groove 5d of the empty bobbin 5A, the incompletely installed empty bobbin 5A is removed. The locking groove 5b also reliably fits into the locking protrusion 8 and begins to rotate integrally with the support body 7. Empty bobbin 5A due to rotation of flyer 3
Centrifugal force acts on the balance side of the presser eye 4a, which was away from the presser eye, and the presser paddle comes into pressure contact with the catch band 9 of the bobbin, so that the roving end hanging from the presser eye 4a is pressed against the catch band 9, which was facing the presser eye 4a. The roving is then wound around the hooking band 9. Even if the pressa paddle comes into pressure contact with the empty bobbin 5A before the incompletely installed empty bobbin 5A fits into the locking protrusion 8, the locking band 9
The width of the roving is made wider so that the hooking band of an incompletely installed empty bobbin also faces the presser eye 4a, so that the winding of the roving can be carried out reliably. When winding of the roving is finished, the tube changing arms 32A and 32B move back, and while the roving frame 1 is in operation, the full bobbin 5B that has been doffed by going around the peg conveyor 34 of the tube changing machine 10 is taken out and a series of tube changing operations are carried out. is completed. In the conventional roving bobbin, the width of the hooking band 9 is narrow because the roving is wound manually, which is 5 mm.
are widely used. At first, when the above-mentioned roving was automatically wound using this bobbin, there were many winding errors and the winding efficiency was less than 92%. Through this test, we noticed that there were fewer winding errors when the pretsai roving was placed opposite the upper part of the strap when the strap was completely attached, so we increased the width of the strap. I tried an experiment. Γ Experimental results (1) Roving machine and number of spindles RMK type 96 spindle manufactured by Howa Kogyo Co., Ltd. (2) Fryer rotation speed 900 r.pm (3) Raw material 100% cotton (4) Roving thread count Nel ^1S 250 gelen/30 yards (5) Height H of locking protrusion 8: 7 mm (see Figure 4) When the experiment was conducted five times (total number of spindles: 480 spindles) under the above conditions, the number of spindles that resulted in wrong winding was as shown in the table below.

[Table] Through the above experiment, it was found that the width of the latching band 9 was made wider than the height H of the latching protrusion + 5 mm or more, and when the empty bobbin was placed on the latching protrusion 8 and the bobbin was incompletely loaded, the width was at least 3 mm or more from the presser eye. It has been found that if the belts are placed facing each other with the latching belt 9 present (l in FIG. 4), no wrapping errors will occur. It goes without saying that this latching belt 9 may be equipped with double rows of narrow latching belts instead of one wide latching belt. As described above, according to the automatic winding method of the roving end of the present invention, a bobbin with a wide hanging body is used, and a bobbin that is incompletely attached to the support body is pressed down by the tube changer arm while the roving frame is rotated. Since it is activated, even if the presser comes into pressure contact with the outer periphery of the empty bobbin before the incompletely installed empty bobbin is completely installed, the roving end can be reliably captured by the wide hanging body. Furthermore, since the roving frame is started while the incompletely installed empty bobbin is pressed down with the tube changing arm, the pressing force acts and the locking groove on the bottom surface of the empty bobbin is It can be inserted into the locking protrusion reliably and quickly and completely installed, and the captured roving end can be accurately wound to prevent winding delays.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of the roving frame and tube changer at the starting position, FIG. 2 is a partial plan view of the tube change arm of the tube changer, and FIG. FIG. 4 is an enlarged side view of the main part of FIG. 3, FIG. 5 is a plan view of the roving frame and tube changing machine, and FIG. 6 is a front view. 1... Rover, 3... Flyer, 4... Pretusa, 4a... Pretusa eye, 5A... Empty bobbin, 5B... Full bobbin, 5b... Locking groove, 5c...
...Upper flange, 5d...Lower flange, 6...Bobbin rail, 7...Support, 8...Latching protrusion, 9...Latching band, 10...Pipe exchange machine, 32A, 32B... tube replacement arm.

Claims (1)

[Claims] 1. A tube changer is installed on the front of a roving frame using an upper-support type flyer, and the tube changer's tube changer arm exchanges full bobbins and empty bobbins on the bobbin rail support to change tubes. In the case where the winding is carried out, the hook bands of both the incompletely loaded empty bobbin that did not fit into the locking protrusion of the support body and the fully loaded empty bobbin that did not fit into the locking protrusion at the first winding position face the presser eye of the flyer. Carry the empty bobbin with a wide strap fitted around its outer periphery using the tube changing arm above the support of the bobbin rail at the tube changing position, and while holding the tube changing arm in that position, change the bobbin rail. During the ascent, the incompletely loaded empty bobbin is raised to the first winding position by pushing up the tube switching arm that can be swung upwards by the lower collar of the bobbin, and the incompletely loaded empty bobbin is raised to the first winding position. The roving machine is started while the bobbin is kept pressed down by the tube change arm, and as the support body rotates and the tube change arm is pushed down, the incompletely installed empty bobbin fits into the locking protrusion of the support body, and the presser spins. A method for automatically winding ends of roving in a roving machine, in which a pressa paddle is brought into pressure contact with a latching band by force, and the roving is wound around a latching band of an empty bobbin.