JP2009046779A - Roving bobbin holder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roving bobbin holder for preventing the dropping-off of a roving from a roving bobbin and simultaneously holding the bobbin, in a spinning machine for spinning the roving unwound from the roving bobbin at a high speed. <P>SOLUTION: This roving bobbin holder 11 for holding the roving bobbin RB in a state capable of axially rotating the roving bobbin RB, in the spinning machine 1 for spinning the roving R unwound from the roving bobbin RB, has a rotation-adjusting device 11e for adjusting the rotation of the roving bobbin RB. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a roving bobbin holding device that holds a roving bobbin so as to be rotatable about its axis in a spinning machine that uses a roving yarn unwound from the roving bobbin.

  Conventionally, a ring spinning machine for producing spun yarn from a roving yarn that has undergone a roving process is known. The fine spinning machine includes a draft device for further drawing the roving yarn and a twisting device for twisting the drawn roving yarn. In this spinning machine, the roving is disposed upstream of the draft device as a roving bobbin, and is suspended so as to be unwound while freely rotating (see, for example, Patent Document 1).

On the other hand, in recent years, a pneumatic spinning machine has been put into practical use in which a sliver produced by a drawing machine is drafted and twisted by a special air nozzle so that the roving process is omitted directly. This pneumatic spinning machine has a spinning speed of 300 to 450 m / min and has high productivity with respect to a ring spinning machine having a spinning speed of about 10 to 20 m / min (for example, see Patent Document 2). ).
Japanese Patent Laid-Open No. 5-208785 JP 2001-207343 A

  By the way, in the above-mentioned pneumatic spinning machine, the applicant has recently attempted to spin a yarn having a large count (a fine count yarn) from a roving yarn that has undergone a roving process. In this case, similarly to the conventional ring spinning machine, it is conceivable that the roving bobbin is suspended from the upstream side of the draft device so as to freely rotate.

  However, in the configuration in which the roving bobbin is suspended so as to freely rotate, when the spinning speed becomes higher than 100 to 200 m / min, the take-up speed of the roving thread from the roving bobbin becomes higher, and spinning is stopped. However, there was a problem that the roving bobbin continued to rotate due to inertia, and the roving wound around the roving bobbin was loosened and dropped out in large quantities.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to remove the roving from the roving bobbin in a spinning machine that spins at high speed using the roving from the roving bobbin. An object of the present invention is to provide a roving bobbin holding device that holds a roving bobbin while preventing the above.

  In order to solve the above-described problems, the present invention provides (1) a roving bobbin holding device that holds a roving bobbin rotatably around its axis in a spinning machine that uses a roving unwound from the roving bobbin. The present invention provides a roving bobbin holding device comprising a rotation adjusting device for adjusting the rotation of the roving bobbin.

  According to the present invention, in the above configuration, (2) the roving bobbin holding device characterized in that the rotation adjusting device has a rotation resistance member that gives resistance to the rotation of the roving bobbin. It is to provide.

  Moreover, the present invention is characterized in that, in the above configuration (2), (3) the rotation resistance member provides resistance to rotation of the roving bobbin according to an operating condition of the spinning machine. A roving bobbin holding device is provided.

  Further, the present invention is characterized in that, in the above-mentioned configuration, (4) the rotation adjusting device has a rotation driving source capable of rotating the roving bobbin around its axis in accordance with the operating condition of the spinning machine. A roving bobbin holding device is provided.

  Further, the present invention is characterized in that, in the above configuration (4), (5) the rotation driving source is operated according to the loosening condition of the roving yarn unwound from the roving bobbin. A roving bobbin holding device is provided.

  According to the roving bobbin holding device of the present invention, since the rotation adjusting device for adjusting the rotation of the roving bobbin is provided, the rotation of the roving bobbin can be quickly stopped when the spinning unit is stopped. As a result, the roving yarn bobbin continues to rotate in spite of the spinning unit being stopped, so that the problem that the roving yarn loosens too much and falls off in large quantities does not occur.

[First Embodiment]
Hereinafter, a preferred embodiment of the roving bobbin holding device of the present invention will be described with reference to the drawings.
1 is a schematic front view showing an example of a spinning machine to which the roving bobbin holding device of the present invention is applied, FIG. 2 is a schematic side view of the spinning machine of FIG. 1, and FIG. 3 is a roving bobbin in the spinning machine of FIG. It is a schematic bottom view which shows the principal part of a holding | maintenance apparatus.

  The spinning machine 1 according to the present embodiment manufactures spun yarn from roving yarn in order to obtain spun yarn with a fine count. As shown in FIG. 1, the spinning machine 1 is configured by arranging a large number of spinning units U in the longitudinal direction of the machine base between a prime mover box MB and a dust box DB. A roving bobbin holding device 11 for holding the roving bobbin RB is disposed on the spinning machine 1. A traveling rail 21 is provided at the lower part of the spinning machine 1 along the direction in which the spinning units U are arranged side by side. On the traveling rail 21, the yarn splicing carriage 3 is disposed so as to be capable of reciprocating along the direction in which the spinning units U are arranged. The yarn joining cart 3 travels toward the spinning unit U that requires yarn joining, stops at the corresponding position, and performs the yarn joining operation.

  As shown in FIG. 1 or FIG. 2, the roving bobbin holding device 11 includes a vertical frame 11a extending upward from the casing 2 of the spinning machine 1, a suspension rail 11b and a horizontal frame 11c extending horizontally from the vertical frame 11a, A suspension hook 11d held by the lower rail 11b and a leaf spring 11e attached to the horizontal frame 11c are provided.

  The suspension rail 11b holds a suspension hook 11d for suspending the roving bobbin RB so as to be slidable along the rail. The hanging hook 11d is detachably engaged with the core RBa of the roving bobbin RB. The hanging hook 11d is rotatable about an axis while being held by the hanging rail 11b.

  The horizontal frame 11c is provided so as to be positioned near the lower end of the roving bobbin RB suspended by the suspension hook 11d. The horizontal frame 11c includes a leaf spring (rotation resistance member) 11e disposed so as to sandwich the lower end of the core RBa of the suspended roving bobbin RB. As shown in FIG. 3, the leaf spring 11 e sandwiches the lower end of the core RBa with its elastic force, and gives a certain resistance to the rotation around the axis of the roving bobbin RB. .

  In the first embodiment, the leaf spring 11e constitutes a rotation adjusting device.

  The roving bobbin RB held by the roving bobbin holding device 11 is disposed above the draft device 4 of the spinning unit U. The roving bobbin RB rotates about the axis and is unwound as the roving yarn R is drawn into the draft device 4.

  As shown in FIG. 1 or FIG. 2, the spinning unit U includes, in order from upstream to downstream, a draft device 4, a spinning device 5, a yarn feeding device 6, a tension ruler 7, a downstream guide 10, A winding device 9 is provided as a main component.

  The draft device 4 includes a combination of a back roller pair 41, a third roller pair 42, a middle roller pair 44 on which an apron belt 43 is mounted, and a front roller pair 45. The draft device 4 extends the roving yarn R.

  Although the detailed configuration of the spinning device 5 is not illustrated, in this embodiment, a pneumatic type that generates the spun yarn SY from the drafted roving R using the swirling airflow from the air injection nozzle is adopted. Yes.

  The yarn feeding device 6 includes a delivery roller 61 and a nip roller 62 provided so as to be in contact with the delivery roller 61. The spun yarn SY delivered from the spinning device 5 is sandwiched between the delivery roller 61 and the nip roller 62 and is sent downward by the rotation of the delivery roller 61.

  The spun yarn SY sent to the downstream side by the yarn feeding device 6 is wound by the winding device 9 via the cutter device 16 and the yarn clearer 17, the tension ruler 7, and the downstream guide 10 for removing the defects of the yarn. Take-up package WP.

  The yarn clearer 17 monitors the thickness of the traveling spun yarn SY, and transmits a yarn defect detection signal to a unit controller (not shown) when a yarn defect of the spun yarn SY is detected. Upon receipt of the yarn defect detection signal, the unit controller immediately operates the cutter device 16 to cut the yarn, stops the draft device 4 and the spinning device 5, and moves the yarn joining cart 3 to the front of the spinning unit U. Self-run. Thereafter, the spinning device 5 and the like are driven again to cause the yarn joining cart 3 to perform yarn joining, so that spinning and winding are resumed.

  As shown in FIG. 1, the yarn joining cart 3 is disposed so as to travel along a traveling rail 21 provided in the casing 2 of the spinning machine 1 body. The yarn joining cart 3 includes a suction pipe (supply side yarn end catching means) 18 for sucking and catching the spun yarn SY continuously supplied from the spinning device 5 on the supply side, and the spun yarn SY on the winding package WP side. A suction mouth (winding side yarn end catching means) 19 and a splicing device 20 for connecting the spun yarns SY captured by the suction pipe 18 and the suction mouth 19.

  A suction air flow is generated at the ends of the suction pipe 18 and the suction mouth 19 by a suction flow generation source (not shown), and the yarn ends are sucked and captured. The yarn splicing device 20 includes a clamp part, a cutter part, and a splicer or knotter (not shown).

The tension ruler 7 is installed with respect to each spinning unit U via the bracket 70, and can be engaged with the spun yarn SY. The tension ruler 7 includes an upstream guide 73 that guides the yarn from the yarn feeding device 6, a roller 71 around which the yarn is wound, a rotational drive source 75 that rotationally drives the roller 71 around its axis, and a rotary yarn hook. Member 72. The yarn hooking member 72 is attached to the roller 71 so as to be rotatable relative to the roller 71. A predetermined rotational resistance is applied to the relative rotation of the yarn hooking member 72 with respect to the roller 71 by frictional force or magnetic force.
The tension ruler 7 optimizes the winding tension by increasing or decreasing the yarn storage amount in the roller 71.

  The downstream guide 10 is disposed downstream of the tension ruler 7 and guides the spun yarn SY that has passed through the tension ruler 7 to the winding device 9 side.

  The spinning machine 1 configured as described above is a drafting device that unwinds the roving yarn R while unwinding the roving yarn R from the roving yarn bobbin RB held by the roving yarn bobbin holding device 11 disposed above. 4 and the drawn roving R is twisted by the spinning device 5 to produce a spun yarn SY. The spun yarn SY is taken up as a take-up package WP by the take-up device 9 while being given an appropriate tension by the tension ruler 7. When the yarn clearer 17 detects a defect in the spun yarn SY, the spun yarn SY is cut by the cutter 16 and the yarn splicing cart 3 executes the yarn splicing. The spinning speed is set to 300 to 450 m / min.

  According to the spinning machine 1, the lower end of the core RBa of the roving bobbin RB suspended so as to be rotatable about the axis is sandwiched between the two leaf springs 11e. Since the pinching by the leaf spring 11e becomes a rotational resistance, even when the spinning speed is high, that is, when the unwinding speed is high, the roving bobbin RB quickly stops rotating when the spinning unit U stops. As a result, the roving yarn bobbin RB continues to rotate freely, so that the problem that the roving yarn R is too loose and falls off in a large amount does not occur.

  Moreover, in this embodiment, since the leaf spring 11e is a simple configuration provided on the lower end of the roving bobbin RB, the roving bobbin holding device 11 that can prevent the roving yarn R from falling off is configured at low cost. be able to.

[Second Embodiment]
Next, another preferred embodiment of the roving bobbin holding device of the present invention will be described with reference to the drawings.
4 is a schematic front view showing another example of a spinning machine to which the roving bobbin holding device of the present invention is applied, and FIG. 5 is a schematic side view of the spinning machine of FIG.

As in the spinning machine 1 according to the first embodiment, the spinning machine 1 ′ according to the second embodiment manufactures a spun yarn from a coarse yarn in order to obtain a spun yarn with a fine count. A roving bobbin holding device 11 ′ for holding the roving bobbin RB is disposed on the spinning machine 1 ′.
In addition, about the same structure as 1st Embodiment, the same code | symbol is used and detailed description is abbreviate | omitted.

  As shown in FIG. 4 or 5, the roving bobbin holding device 11 ′ includes a vertical frame 11a extending upward from the casing 2 of the spinning machine 1 ′, a horizontal frame 11c extending horizontally from the vertical frame 11a, and a horizontal frame 11c. Attached roving yarn bobbin rotation drive motor (rotation drive source) 11f, a controller 11h for controlling the roving yarn bobbin rotation driving motor 11f, and a yarn for detecting looseness of the roving yarn R unwound from the roving yarn bobbin RB A slack detector 11i.

  A roving yarn bobbin rotation drive motor 11f is attached to the horizontal frame 11c via a bracket 11g. The roving bobbin rotation drive motor 11f is disposed above each spinning unit U. The roving bobbin RB is arranged by coaxially connecting the winding core RBa and the rotation shaft of the roving bobbin rotation drive motor 11f.

  The roving bobbin rotation drive motor 11f is controlled by the controller 11h. The controller 11h receives a signal from a unit controller (not shown), and starts rotation of the roving bobbin rotation drive motor 11f in synchronization with the start of spinning by the spinning unit U.

  The yarn slack detector 11i is arranged to face the roving yarn R which is unwound from the roving yarn bobbin RB and goes to the draft device 4. The yarn slack detector 11i comprises a photoelectric sensor, and detects the slackness of the roving R by detecting the approach and separation of the roving R.

  The controller 11h receives a detection signal from the yarn slack detector 11i. The controller 11 promptly stops the rotation of the roving bobbin rotation drive motor 11f when the loosening of the roving yarn R detected by the yarn loosening detector 11i becomes larger than a predetermined amount of loosening. Here, the predetermined amount of looseness is set to a level at which the coarse yarn R does not fall off a large amount from the coarse yarn bobbin RB.

  In the second embodiment, the roving bobbin rotation drive device 11f, the controller 11h, and the yarn slackness detector 11i constitute a rotation adjusting device.

  The roving yarn bobbin RB is rotated around the axis by the roving yarn bobbin rotation drive motor 11f, and the roving yarn R is unwound. The unwound roving yarn R is introduced into the draft device 4.

  The spinning machine 1 ′ configured as described above releases the roving yarn R by forcibly rotating the roving bobbin RB held on the roving bobbin holding device 11 ′ by the roving bobbin rotation drive motor 11f. Hesitate. The unwound roving yarn R is drawn by a draft device 4 and twisted by a spinning device 5 to become a spun yarn SY. The spun yarn SY is taken up as a take-up package WP by the take-up device 9 while being given an appropriate tension by the tension ruler 7. When the yarn clearer 17 detects a defect in the spun yarn SY, the spun yarn SY is cut by the cutter 16 and the yarn splicing cart 3 executes the yarn splicing. The spinning speed is set to 300 to 450 m / min.

  According to the spinning machine 1 ', when the looseness of the roving yarn R detected by the yarn loosening detector 11i becomes larger than a predetermined amount of loosening, the rotation of the roving yarn bobbin rotation drive motor 11f, that is, the roving yarn bobbin RB. Is immediately stopped. As a result, there is no problem that the roving yarn R is too loose and falls off from the roving bobbin RB in a large amount.

  Further, according to the spinning machine 1 ′, the rotation of the roving bobbin RB is started in synchronization with the start of spinning by the spinning unit U, and the roving Y starts to be unwound. That is, the roving yarn bobbin RB is not rotated by the drawing of the roving yarn R into the draft device 4, but is positively rotated by the roving yarn bobbin rotation drive motor 11f. As a result, when unwinding is started from the state where the roving bobbin RB is stationary, the roving R is not pulled strongly, and yarn breakage is prevented.

[Modification]
As mentioned above, although embodiment of this invention was described concretely, this invention is not limited to these.
For example, in the first embodiment, the leaf spring 11e may be displaceable by an actuator so that the pinching of the roving bobbin RB to the winding core RBa can be appropriately executed / released. In this case, when the unwinding is started, the above-described sandwiching is released, and when the spinning is stopped and the unwinding is stopped, the actuator is controlled so as to execute the above-described sandwiching. The roving yarn R can be prevented from being pulled strongly, and yarn breakage can be prevented.

  In the first embodiment, the leaf spring 11e is used as the rotation resistance member. However, the present invention is not limited to this, and a known configuration in which rotation resistance is given by frictional force or magnetic force may be applied.

  In the second embodiment, the yarn slack detector 11i may be omitted, and the coarse yarn bobbin rotation drive motor 11f may be controlled based only on a signal from a unit controller (not shown). In this case, by starting / stopping the rotation of the roving bobbin RB in synchronization with the spinning start / spinning stop of the spinning unit U, it is possible to prevent the yarn breakage and a large amount of the roving R from falling off.

  In the second embodiment, the rotational speed of the roving bobbin rotation drive motor 11f, that is, the unwinding speed of the roving yarn R, is always adjusted to an appropriate speed in accordance with the detection signal from the yarn slack detector 11i. It may be configured. In this case, it is possible to prevent the yarn breakage and the loose yarn R from falling off more accurately.

  Further, in the second embodiment, the roving yarn bobbin rotation drive motor 11f is connected to the lower end side of the core RBa of the roving yarn bobbin RB, but may be connected to the upper end side of the winding core RBa.

  Further, the bobbin rotational drive motor 11f may be connected to one end of the winding core RBa and the other end may be sandwiched between the leaf springs 11e. In this case, after the roving yarn bobbin rotation drive motor 11f is stopped, the rotation of the roving yarn bobbin RB is more quickly stopped.

It is a schematic front view showing an example of a spinning machine to which the roving bobbin holding device of the present invention is applied. It is a schematic side view of the spinning machine of FIG. It is a schematic bottom view which shows the principal part of the roving bobbin holding | maintenance apparatus in the spinning machine of FIG. It is a schematic front view which shows another example of the spinning machine to which the roving bobbin holding device of this invention was applied. It is a schematic side view of the spinning machine of FIG.

Explanation of symbols

DB Dust box MB Motor box R Coarse yarn SY Spinning yarn U Spinning unit WP Winding package 1 Spinning machine 2 Casing 3 Yarn splicing cart 4 Draft device 5 Spinning device 6 Yarn feeding device 7 Tension ruler 8 Winding tension control device 9 Winding device 10 Downstream Guide 11 Coarse Bobbin Holding Device 11a Vertical Frame 11b Hanging Rail 11c Horizontal Frame 11d Hanging Hook 11e Leaf Spring (Rotation Adjustment Device)
16 Cutter device 17 Yarn clearer 18 Suction pipe 19 Suction mouse 20 Yarn splicing device 21 Traveling rail 41 Back roller pair 42 Third roller pair 43 Apron belt 44 Middle roller pair 45 Front roller pair

Claims (5)

  A roving bobbin holding device for holding a roving bobbin so as to be rotatable about its axis in a spinning machine that uses a roving yarn unwound from the roving bobbin, and for adjusting the rotation of the roving bobbin. A roving bobbin holding device comprising the device.   The roving bobbin holding device according to claim 1, wherein the rotation adjusting device includes a rotation resistance member that provides resistance to rotation of the roving bobbin.   3. The roving bobbin holding device according to claim 2, wherein the rotation resistance member gives resistance to the rotation of the roving bobbin according to the operating state of the spinning machine.   The said rotation adjustment apparatus has a rotation drive original which can rotate the said roving bobbin to the surroundings of the axis | shaft according to the driving | running condition of the said spinning machine, The any one of Claims 1-3 characterized by the above-mentioned. The roving bobbin holding device described in 1.   5. The roving bobbin holding device according to claim 4, wherein the rotation driving source is operated according to a loosening state of the roving loosened from the roving bobbin.

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