JPH10109830A - Doffing method for spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain spindle loop winding by increasing the number of loop winding around a spindle by tail winding. SOLUTION: At the time of full purkage, shell winding 43 and tail winding 44 are provided for a full bobbin 37 above a spindle 39 from the rising position to the tail winding position T of a ring plate 40. After the spindle 39 stops, the ring plate 40 at the tail winding position T is lowered to a descending position P just before the full bobbin 37 is raised simultaneously with other ones. After a tail yarn 46 is stretched diagonally, the full bobbin 37 is raised to unbind and loop-wound around the spindle 39. The full bobbin 37 is then lowered to the spindle 39, and the full bobbin 37 is pulled up from the spindle 39. Loop winding is conducted together with previous loop winding to increase loop winding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a doffing method for a spinning machine, and more particularly, to a doffing method for a spinning machine in which the number of loop windings around a spindle by a tail winding is increased to reliably hold the loop winding of the spindle. .

[0002]

2. Description of the Related Art A conventional doffing method for a spinning machine is disclosed in
Japanese Patent Application Laid-Open No. 100355/1990 and Japanese Patent Application Laid-Open No. 3-180526 / 1991 disclose such a device. In the conventional doffing method, a bobbin on a spindle is a doff bobbin having a predetermined winding amount (generally a full bobbin).
Then, the ring plate was lowered to the lower end of the full bobbin to perform body winding and tail winding, and then the ring plate located at the lower end of the full bobbin stretched the tail thread substantially horizontally between the bobbin and the full bobbin at that position. While pulling out the full bobbin all at once with the simultaneous transfer device in the same state, the loop winding remaining on the spindle as the remaining thread of the previously exchanged full bobbin is hooked on the hook inside the full bobbin and removed at the same time After the full thread of the full bobbin is unraveled to form a new loop winding on the spindle and the full bobbin is positioned in front of the spindle,
An empty bobbin is fitted to a spindle in which the tail thread is loop-wound, and the tail thread connected between the spindle and the full bobbin is cut.

[0003]

In the conventional doffing method of the spinning machine, the ring plate is lowered to the lower end of the full bobbin, the tail winding is performed, and the full bobbin is pulled out and lifted, and at the same time, the tail winding is unraveled. A new loop is wound around the spindle,
At this time, the tail thread from the tail winding to the ring plate is held almost horizontally, so tension is working in the horizontal direction,
There is a problem that the tail winding at the lower end of the full bobbin has friction between the yarns, the tail winding is difficult to unwind, and the loop winding around the spindle is small. If the loop winding on the spindle is small, the frictional resistance between the spindle and the yarn forming the loop winding on the spindle is small, and the loop is likely to break off when tension is applied to the tail yarn or when the tail yarn is cut. There is a problem that the yarn is detached from the spindle by return and twisting is easily caused. In order to solve these problems, it is conceivable to increase the loop length by increasing the spindle length, but increasing the spindle length increases the loop winding, but the spinning machine becomes larger, the spindle rotation becomes more stable, and the spindle weight increases. However, there is a problem that a large driving source is required with the increase of the number.

[0004]

In order to solve the above-mentioned problems, according to the present invention, when the bobbin on the spindle becomes a doff bobbin wound in a predetermined amount, the ring plate is lowered to the butt winding position and the ball is wound. The bottom end of the lifting bobbin is wrapped around the bottom, and after stopping the spindle, when pulling out the doff bobbin, lower the ring plate by an appropriate amount from the bottom winding position to make the tail thread between the ring plate and the bottom winding substantially horizontal. From the bottom, and a downward tension was applied to the tail thread to make it easier to unwind the tail thread. Also, by lowering the ring plate, the winding start position of the tail yarn (winding position of the loop winding) is lowered, and the length of winding of the tail yarn to the spindle from this winding start position to the tail winding position is increased. Increased the loop volume. Then raise the full bobbin with respect to the spindle, unwind the bottom bobbin and loop it around the spindle, then lower the full bobbin to the spindle, and then withdraw the full bobbin and loop it again with the previous loop when unloading the bobbin. And increased the number of loops.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, when the bobbin on the spindle becomes a doff bobbin wound in a predetermined amount, the ring plate is lowered to the tail winding position, and the lower end of the doff bobbin is subjected to a tail winding. Thereafter, when the spindle stops, the doff bobbin is pulled out and lifted, and in a doffing method of a spinning machine that performs loop winding on the spindle by the tail winding, the ring plate is further lowered from the tail winding position when the doff bobbin is pulled out. Since the ring plate is lowered in this way, the tail yarn held substantially horizontally between the ring plate and the doff bobbin is stretched in a state of being inclined downward, so that the bottom end is wound when the doff bobbin is removed and fried. Can be easily unwound and looped easily. Further, the loop winding to the spindle is increased by the length of the tail thread inclined downward due to the lowering of the ring plate, the frictional resistance between the spindle and the yarn forming the loop winding is increased, and the loop does not come off. In addition, the untwisting makes it difficult for the yarn to come off the spindle, and twisting cannot be performed. It is preferable that the loop winding is increased only by raising and lowering the ring plate without increasing the spindle length.

Further, the full bobbin is pulled out so as not to be completely removed from the spindle and wound around the spindle in a loop. Then, the full bobbin is lowered while facing the spindle. A loop winding is further formed on the spindle together with the winding. This makes it possible to further increase the number of loop windings as compared with the case where the doff bobbin is pulled out from the spindle at one time.

[0007]

Next, an embodiment of a doffing method for a spinning machine according to the present invention will be described. In FIG. 1, reference numeral 1 denotes a spinning machine, and 2 denotes a known simultaneous switching device (for example, Japanese Patent Application Laid-Open No. H8-100335) mounted on the left and right front surfaces of the spinning machine 1, and a doffing bar 3 of the switching device 2. Are provided with a number of tube gripping devices 4 corresponding to the spindles 39, and perform vertical and oscillating motions in a predetermined order, which will be described in detail later, by a vertical motion device and a rocking device (not shown). Replacement of empty tubes, that is, tube replacement is performed. Reference numeral 7 denotes a deposit peg provided corresponding to each spindle 39. When the doff bobbin on the spindle 39, here the full bobbin 37, is full, by operating a ring plate 40 provided with a traveler 48 slidably, the body winding 43 and the tail winding 44 are applied to the outer periphery. I have. FIG.
In this case, the ring plate 40 is located at the tail winding position T where the tail winding 44 is performed after the body winding 43 is performed on the full bobbin 37. The tail winding position T is also a winding start position of the ring plate 40 that winds the spun yarn 41 around the empty bobbin 36.

The ring plate 40 is lifted while repeating the chase by a known elevating device at the time of winding, and when the full bobbin is full, the bobbin position T shown by a solid line in FIG. It is possible to move up and down between the lower position P shown by the arrow. The descending position P of the ring plate 40 is set at a position where the ring plate 40 does not interfere with other parts of the spinning machine 1 when the ring plate 40 descends an appropriate distance from the tail winding position T. The elevating operation of the ring plate 40 between the tail winding position T and the descending position P is performed by a well-known ring plate swinging device using a swinging motor or the like, for example. Inside the bobbin 36A (including a full bobbin and an empty bobbin) to be fitted to the spindle 39, a hooking tool such as a well-known moquette or the like in which very short feathers of hairs (not shown) are planted is provided. Here, the full bobbin 37 is a doff bobbin, but a doff bobbin that is doffed by, for example, 8-minute balls wound in a predetermined amount may be used. Reference numeral 8 denotes a tube holding device attached to the spinning machine 1. A peg 11 protrudes from a guide rail 9 and a number of peg trays 10 having a diameter equal to the spindle pitch are fitted therein. , The peg 11 is vertically opposed to the spindle 39 at the stop position.

Next, an outline of the tail thread cutting device 12 for cutting the tail thread will be described. This trailing yarn cutting device 12 is disclosed in
As shown in FIG. 1, a tail yarn cutting device 12 has a traveling body 16 mounted on a guide rail 15 provided on the front surface of a spinning machine stand. The spinning machine 1 is connected to ropes stretched between pulleys provided on the GE and OE sides (not shown) of the spinning machine 1, and reciprocates along a spindle row by forward and reverse rotation of a motor. A pair of two rotary cutters 14 are rotatably and vertically pivoted on the upper part of the traveling machine body 16, and the rotary cutters 14 are partially overlapped with an appropriate contact pressure. The rotary cutter 14 is connected to a driving wheel 17 of a traveling machine body 16 by an appropriate V pulley and a belt, and rotates when the traveling machine body 16 travels from one side to the other side (for example, from the GE side to the OE side) of the spinning machine. The cutters 14 are adapted to rotate in the direction of pulling in each other. In addition, the tail yarn cutting device 12
Is provided with a thread cutting cutter 13. The cutter 13 is driven by a driving mechanism (not shown), and when the traveling machine body 16 travels left and right to reach a standby position on the other side (OE side), FIG. As shown in (A), the cutter 13 rotates and enters the inside of the balloon-shaped inflatable string 50 from the state of being housed in the traveling machine body 16 and becomes an operation position where the string 50 can be cut, and the one side ( When the cutter 13 reaches the standby position (GE side), the cutter 13 is in a storage position in which the cutter 13 is stored in the traveling machine body 16.

Next, the operation of the doffing method of the present invention will be described with reference to FIGS.
Will be described in order. While the spinning machine 1 is operating, the doffing bar 3 stands by at a standby position below the spindle 39 as shown in FIG. 1, and an empty bobbin 36 is inserted into the peg 11 of the peg tray 10. When the bobbin 36A on the spindle 39 reaches the approximately five-piece ball 38 and the ring plate 40 rises, the tail yarn cutting device 1 waiting on the OE side of the spinning machine 1
2 starts running, and the cord 50 is sequentially hooked and cut by the cord cutting cutter 13 located at the operation position protruding from the traveling machine body 16. By this cutting operation, the loop winding 42 wound around the spindle 39 by the previous refilling and connected to the spun yarn 41 is disconnected from the spun yarn 41, and the remaining yarn wound around the spindle 39 is removed. Become. The tail thread cutting device 12 waits for the next operation on the opposite side, and the cutter 13 is at the storage position in the traveling machine body 16 as described above (FIG. 4A). And doffing bar 3
Swings in a direction (hereinafter referred to as the (-) side) largely away from the standby position from the standby position until the spinning machine 1 stops, then rises higher than the upper end of the spindle, and stands by at that position. When the bobbin on the spindle 39 becomes the full bobbin 37, as shown in FIG. 2, the ring plate 40 is lowered to perform the bobbin winding 43, and at the hip bobbin position T, the tail bobbin 44 is formed below the full bobbin 37. Stop (Fig. 4
(B)).

Next, the doffing bar 3 swings in the direction approaching the machine base (hereinafter referred to as the (+) side) to perform a further lowering operation, and the tube gripping device 4 grips the full bobbin 37.
Then, immediately before the full bobbin 37 is pulled out and lifted, the ring plate 40 descends from the butt winding position T to the lowering position P as shown in FIG. 2, and the butt winding 44 is slightly loosened and the butt stretched horizontally. The thread 46 is stretched in an inclined state. Although the timing of lowering the ring plate 40 is performed immediately before raising the full bobbin 37, the lowering timing may be performed during or after raising the full bobbin 37 after the tail winding. Then
The doffing bar 3 is raised to a position where the full bobbin 37 cannot be completely removed from the spindle 39. The loop winding 42 wound around the spindle 39 as the remaining yarn by this ascent operation is hooked by the hook, is locked and held in the hole of the full bobbin 37, and is removed from the spindle 39. Also,
The rise of the full bobbin 37 unravels a part of the tail winding 44, and winds it as a loop winding 42a around the spindle 39 from which the remaining thread (the previous loop winding 42) has been removed (FIG. 4C).
Next, the doffing bar 3 descends, and the loop winding 42
The full bobbin 37 is loosely inserted into the spindle 39 on which a is wound (FIG. 4D).

Next, the doffing bar 3 is lifted to remove the full bobbin 37 from the spindle 39. By this extracting operation, the remaining tail winding 44 is loosened, and the loop winding 42 is further wound around the spindle 39 together with the previous loop winding 42a (FIG. 5E). The doffing bar 3 from which the full bobbin 37 has been pulled out slightly swings to the (-) side and then descends, and the grasped full bobbin 37 is inserted into the deposit peg 7 and thereby pulled from the full bobbin 37. The unraveled tail thread 46 reaches the spindle 39 from the full bobbin 37. The spinning thread 41 is wound around the spindle 39 as a loop winding 42, and then reaches the draft part 49 via the traveler 48, the anti-node ring 47 and the snail wire 51. (FIG. 5 (F)).

Next, the doffing bar 3 is raised and further swings to the (-) side, then descends greatly, and then swings to the (+) side. (FIG. 5 (G)). The doffing bar 3 holding the empty bobbin 36 rises slightly, pulls out the empty bobbin 36 from the peg tray 10,
Next, it swings greatly to the (-) side and further rises to the highest position, and after swinging to the (+) side from the ascending position, performs a descending operation to move the gripped empty bobbin 36 to the spindle 3.
9 At this time, the loop winding 42 wound around the spindle 39 is connected to the inserted empty bobbin 36 and the spindle 3.
It is sandwiched between 9 and held down. Further, when the empty bobbin 36 is inserted into the spindle 39, the ring plate 40 at the lower position P rises to the tail winding position T which is the winding start position of the spun yarn 41 (FIG. 5 (H)).

The doffing bar 3 with the empty bobbin 36 inserted into the spindle 39 slightly rises and swings to the (-) side, then descends, and grips the full bobbin 37 on the deposit peg 7. Next, after the doffing bar 3 moves up to the highest position, it swings further to the (-) side, so that the tail thread 4
6 is diagonally stretched from the full bobbin 37 to the spindle 39 via the anti-node ring 47, and the spinning 41 passes from the loop winding 42 to the traveler 48 and the like, and the draft part 4
9 (FIG. 6 (I)). When the unraveled tail thread 46 is stretched as described above, the thread 5
Then, the tail yarn cutting device 12 that has been on standby at the GE side of the spinning machine 1 travels again along the spindle row, and cuts the tail yarn 46 between the full bobbin 37 and the spindle 39.
In this cutting, the rotation of the rotary cutter 14 is as described above, so that the stretched tail thread 46 is pulled in and cut securely (FIG. 6 (J)).

When the tail thread 46 is cut, the doffing bar 3 swings to the (+) side and descends to hold the full bobbin 3 which is gripped.
7 is attached to the deposit peg 7 again (FIG. 6 (K)). Thereafter, the doffing bar 3 is raised and swings to the (+) side to perform a slightly lowering operation to push the empty bobbin 36 facing the spindle 39 and fit it on the spindle 39 (FIG. 6).
(L)). Next, the doffing bar 3 slightly rises and swings to the (-) side, then descends, grasps the full bobbin 37 on the deposit peck 7, and starts the machine again (FIG. 7).
(M)). Next, the doffing bar 3 rises to the highest position, further swings to the (-) side, then descends, then swings to the (+) side, and then slightly descends to release the full bobbin 37 gripping. It is mounted on the peg 11 of the peck tray 10 (FIG. 7 (N)), and then slightly rises and returns to the standby position. Thus, the tube replacement operation is completed. In the above description, the doffing bar is raised before the machine is full, and the machine is restarted after the empty bobbin is mounted on the spindle in order to reduce the machine stagnation time.

[0016]

As described above, according to the present invention, the bobbin on the spindle becomes a doff bobbin wound in a predetermined amount. When pulling out the doff bobbin, lower the ring plate further from the butt winding position and stretch the butt thread between the ring plate and the doff bobbin in an inclined state, so that the butt winding can be easily unwound and loop winding can be easily done, Further, the lowering of the ring rail lowers the winding start position of the tail yarn, and the length of winding of the tail yarn from the winding start position to the tail winding position increases, so that the number of loop windings increases. Further, since the doffing bobbin is lifted at least once from the spindle and loop-wound, then lowered to the spindle and extracted again to form a loop winding together with the previous loop winding, a large number of loop windings are formed.

[Brief description of the drawings]

FIG. 1 is a sectional view of a spinning machine.

FIG. 2 is an explanatory diagram of a tail winding position and a descending position of a ring plate.

FIG. 3 is an explanatory diagram illustrating a state where a full bobbin is removed.

FIG. 4 is an explanatory diagram showing a bobbin replacing operation.

FIG. 5 is an explanatory diagram showing a bobbin replacing operation.

FIG. 6 is an explanatory diagram showing a bobbin replacing operation.

FIG. 7 is an explanatory diagram showing a bobbin replacing operation.

[Explanation of symbols]

 36A bobbin 37 full bobbin 39 spindle 40 ring plate 42 loop winding 44 tail winding T tail winding position

Claims (2)

[Claims] When the bobbin on the spindle becomes a doff bobbin wound in a predetermined amount, the ring plate is lowered to the tail winding position to wind the tail on the lower end of the doff bobbin. A doffing method for a spinning machine in which a lifting bobbin is pulled out and looped around a spindle by a tail winding, wherein the ring plate is further lowered from the tail winding position when the doffing bobbin is pulled out. . 2. Pulling out the full bobbin so as not to be completely removed from the spindle, loop-wrapping the spindle around the spindle, lowering the full bobbin while facing the spindle, pulling out the full bobbin from the spindle again, 2. The method according to claim 1, further comprising forming a loop winding on the spindle together with the winding.