JP2014009404A - Cleaning device, draft machine and spinning machine of draft roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning device, a draft machine and a spinning machine of a draft roller having a pad body with high abrasion resistance.SOLUTION: A cleaning device 61 removes cotton sugar and others adhered to an outer peripheral surface of a front bottom roller 28 and has a pad body 100 that is set to come into contact with the outer peripheral surface of the front bottom roller 28. A roller contacting face 101 of the pad body 100 that is brought into contact with the front bottom roller 28 is formed into a shape to match the outer peripheral surface of the front bottom roller 28. Thus, surface contact is achieved between the roller contacting face 101 and the outer peripheral surface of the front bottom roller 28.

Description

  The present invention relates to a cleaning device that cleans a draft roller, a draft device including the cleaning device, and a spinning machine.

  In the spinning machine, a draft device draws the fiber bundle and supplies the drawn fiber bundle to the spinning device. When using raw cotton rich in cotton sugar, the cotton sugar may adhere to the draft roller of the draft device. Then, as an apparatus for removing the cotton sugar adhering to the draft roller, there is one described in Patent Document 1, for example. Patent Document 1 describes a structure in which cotton sugar is removed by bringing a resin-made pad body formed in a flat plate shape into contact with the most downstream front bottom roller among a plurality of draft rollers.

JP 2011-32618 A

  When the pad body is brought into contact with the iron front bottom roller rotating at high speed to remove the cotton sugar, the resin pad body is worn. For this reason, it is required to improve the wear resistance of the pad body.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a draft roller cleaning device, a draft device, and a spinning machine with good wear resistance of a pad body.

  The draft roller cleaning device of the present invention includes a pad body provided so as to be able to contact the outer peripheral surface of the draft roller. The roller contact surface in contact with the draft roller in the pad body is formed in a shape along the outer peripheral surface of the draft roller.

  In this draft roller cleaning device, since the roller contact surface of the pad body is shaped along the outer peripheral surface of the draft roller, the pad body and the draft roller are in surface contact. When the pad body and the draft roller are in surface contact, the force received by the pad body when the pad body is pressed against the draft roller is distributed over the entire roller contact surface. Thereby, it is suppressed that only a part of pad body wears locally, and it can improve wear resistance of a pad body.

  It is preferable that a groove is provided on the roller contact surface. It is preferable that the groove extends on the roller contact surface in a linear shape, a curved shape, a shape combining a straight line and a straight line, and a shape combining a straight line and a curved line. According to this structure, the groove | channel provided in the roller contact surface becomes an air escape place between the roller contact surface of a pad body, and the outer peripheral surface of a draft roller. Thereby, the pressure fluctuation of the air which entered between the pad body and the draft roller can be reduced, and the generation of noise due to the air pressure fluctuation can be reduced.

  The groove extends in a V shape on the roller contact surface, and the direction of the V-shaped groove is such that the outer peripheral surface of the draft roller moves from the V-shaped closing side toward the opening side. preferable. According to this configuration, when the air in the groove moves with the rotation of the draft roller, the air does not collect in the V-shaped closing side portion in the groove, and the V-shaped opening side end portion in the groove. Air can be diffused toward. Thereby, generation | occurrence | production of the noise by the pressure change of air can be reduced further.

  The draft device of the present invention includes a plurality of draft rollers for stretching the fiber bundle, and the above-described draft roller cleaning device provided for the most downstream draft roller in the flow direction of the fiber bundle among the plurality of draft rollers, Is provided. Thereby, the draft device which improved the abrasion resistance of the pad body can be obtained. The most downstream draft roller rotates at a higher speed than the other draft rollers. Therefore, the frequency of maintenance of the draft device can be reduced by bringing the above-mentioned pad body having good wear resistance into contact with the draft roller rotating at high speed. When the pad body is brought into contact with the draft roller, noise increases as the rotational speed of the draft roller increases. Then, the noise which arises with a draft apparatus can be effectively suppressed by making the pad body provided with the groove | channel contact the draft roller which rotates at high speed.

  The pad body is preferably disposed so as to cover the outer peripheral surface of the draft roller. By arranging the pad body so as to cover the outer peripheral surface of the draft roller, the area of the roller contact surface of the pad body can be increased. By arranging the pad body in this way, the wear resistance of the pad body can be further improved.

  The spinning machine of the present invention includes the above-described draft device and an air spinning device that spins a fiber bundle drawn by the draft device by a swirling airflow. According to this configuration, a spinning machine including a draft device in which a pad body with good wear resistance is incorporated can be obtained.

  According to the present invention, it is possible to provide a draft roller cleaning device, a draft device, and a spinning machine with good wear resistance of the pad body.

It is a front view showing the whole spinning machine composition concerning one embodiment of the present invention. It is a side view which shows the draft apparatus of FIG. FIG. 2 is an enlarged side view showing the configuration of the cleaning device of FIG. 1. It is a figure which shows a pad body, (a) is the front view which looked at the pad body from the roller contact surface side, (b) is a side view of a pad body. It is an expansion perspective view which shows the structure of the cleaning apparatus of FIG. It is an expansion perspective view which shows the principal part of the pad support mechanism of the cleaning apparatus of FIG. It is an enlarged side view which shows the mode of the cleaning apparatus when the pad body of FIG. 1 spaces apart from the front bottom roller.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same or an equivalent part, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 1, the spinning machine 1 includes a large number of spinning units 2 arranged side by side. Each spinning unit 2 includes a draft device 7, an air spinning device 9, a yarn storage device 11, and a winding device 12.

  The draft device 7 is provided in the vicinity of the upper end of the frame 6 of the spinning machine 1 body. The air spinning device 9 spins the fiber bundle 8 sent from the draft device 7. The spun yarn 10 discharged from the pneumatic spinning device 9 is sent to the yarn accumulating device 11 after passing through a clearer 52 that detects a defect of the spun yarn 10 and removes a defective portion of the spun yarn 10. After passing through the yarn storage device 11, the spun yarn 10 is wound up by the winding device 12 to form a package 45.

  The spinning machine 1 includes a blower box 80 and a prime mover box 81. The spinning machine 1 includes a yarn splicing carriage 3 provided so as to be able to run in the direction in which the spinning units 2 are arranged side by side. As shown in FIG. 1, the yarn joining cart 3 includes a splicer (yarn joining device) 43, a suction pipe 44, and a suction mouth 46.

  When yarn breakage or yarn breakage occurs in a spinning unit 2, the yarn splicing carriage 3 travels on the rail 41 fixed to the frame 6 to the spinning unit 2 and stops at that position. The yarn splicing carriage 3 captures the yarn end on the pneumatic spinning device 9 side with the suction pipe 44 and the yarn end on the winding device 12 side with the suction mouth 46, and rotates the suction pipe 44 and the suction mouth 46 respectively. By moving the yarn, the captured yarn end on the air spinning device 9 side and the yarn end on the winding device 12 side are guided to the splicer 43. The splicer 43 joins the guided yarn end on the pneumatic spinning device 9 side and the yarn end on the winding device 12 side. As a result, the yarn end on the pneumatic spinning device 9 side and the yarn end on the winding device 12 side are connected, and the winding operation can be resumed.

  The spinning machine 1 is provided with a doffing cart (not shown) for doffing the fully packaged package 45. The doffing cart travels independently of the yarn joining cart 3.

  As shown in FIG. 2, the draft device 7 extends the sliver 13 to generate a fiber bundle 8. The draft device 7 includes a top roller and a bottom roller that are arranged to face each other. The top roller includes four draft rollers, a back top roller 14, a third top roller 15, a middle top roller 16 on which a top apron belt 17 is mounted, and a front top roller 18. The bottom roller includes four draft rollers: a back bottom roller 24, a third bottom roller 25, a middle bottom roller 26 on which a bottom apron belt 27 is mounted, and a front bottom roller (the most downstream draft roller) 28. The bottom rollers 24, 25, 26 and 28 are arranged so as to face the top rollers 14, 15, 16 and 18, respectively.

  The draft device 7 includes a cleaning device 61 for removing cotton sugar and the like attached to the front bottom roller 28. The detailed configuration of the cleaning device 61 will be described later.

  The sliver 13 sent to the draft device 7 is drawn by a draft roller to become a fiber bundle 8 and sent to the pneumatic spinning device 9. The front top roller 18 and the front bottom roller 28 arranged on the most downstream side in the flow direction of the sliver 13 rotate at a higher speed than the other rollers 14, 15, 16, 24, 25 and 26.

  The pneumatic spinning device 9 includes a fiber guide portion, a swirl flow generation nozzle, and a hollow guide shaft body, although detailed description and illustration are omitted. The fiber guide unit guides the fiber bundle 8 sent from the draft device 7 to a spinning chamber formed inside the pneumatic spinning device 9. The swirl flow generating nozzle is disposed around the path of the fiber bundle 8 and generates a swirl flow in the spinning chamber. By this swirl flow, the fiber ends of the fiber bundles 8 in the spinning chamber are reversed and swirled. The hollow guide shaft body guides the spun yarn 10 from the spinning chamber to the outside of the pneumatic spinning device 9. The spun yarn 10 guided to the outside of the pneumatic spinning device 9 is sent to the yarn accumulating device 11.

  The yarn accumulating device 11 retains the spun yarn 10 delivered from the air spinning device 9 at the time of yarn splicing by the yarn splicing carriage 3 and the function of applying a predetermined tension to the spun yarn 10 and pulling it out from the pneumatic spinning device 9. It has a function of preventing slack of the spun yarn 10 and a function of adjusting the tension so that the fluctuation of the tension on the winding device 12 side is not transmitted to the pneumatic spinning device 9 side. As shown in FIG. 2, the yarn storage device 11 includes a yarn storage roller 21, a yarn hooking member 22, and an electric motor 23.

  The yarn hooking member 22 is configured to be able to engage (hang) with the spun yarn 10. The yarn hooking member 22 is supported so as to be rotatable relative to the yarn accumulating roller 21. The yarn hooking member 22 is provided with a resistance torque that resists relative rotation of the yarn hooking member 22 with respect to the yarn accumulating roller 21 by appropriate biasing means (not shown). By this resistance torque, the yarn hooking member 22 rotates following the rotation of the yarn accumulating roller 21, and as a result, the yarn accumulating roller 21 and the yarn hooking member 22 can rotate integrally. When a force that overcomes the resistance torque is applied to the yarn hooking member 22, the yarn hooking member 22 rotates relative to the yarn accumulating roller 21.

  The yarn storage roller 21 winds and stores the spun yarn 10 around its outer peripheral surface. The yarn accumulating roller 21 is rotationally driven by an electric motor 23. When the yarn hooking member 22 engaged with the spun yarn 10 rotates integrally with the yarn accumulating roller 21, the spun yarn 10 is swung around by the yarn hooking member 22 and is guided and wound around the outer peripheral surface of the yarn accumulating roller 21. . The spun yarn 10 wound around the yarn accumulating roller 21 is sent to the distal end side of the yarn accumulating roller 21 by the new spun yarn 10 that is sequentially wound around the proximal end side of the yarn accumulating roller 21. Then, the spun yarn 10 is pulled out from the front end side of the yarn accumulating roller 21, passes through the yarn hooking member 22, and then sent to the winding device 12.

  The tension adjusting function of the yarn storage device 11 will be described. When the spun yarn 10 wound around the yarn accumulating member 22 is applied to the spun yarn 10 in the state where the spun yarn 10 is wound around the yarn accumulating roller 21, the spun yarn 10 is applied from the leading end side of the yarn accumulating roller 21. A force to rotate the yarn hooking member 22 so as to unwind the spun yarn 10 is applied to the yarn hooking member 22. Therefore, if the yarn tension on the downstream side of the yarn accumulating device 11 (the yarn tension between the yarn accumulating device 11 and the winding device 12) is higher than the resistance torque applied to the yarn hooking member 22, the yarn hooking member 22 By rotating independently of the yarn accumulating roller 21, the spun yarn 10 is gradually unwound from the tip side of the yarn accumulating roller 21 via the yarn hooking member 22.

  When the yarn tension on the downstream side of the yarn accumulating device 11 is not stronger than the resistance torque applied to the yarn hooking member 22, the yarn hooking member 22 rotates integrally with the yarn accumulating roller 21. In this case, the yarn hooking member 22 prevents the spun yarn 10 from being unwound from the leading end side of the rotating yarn accumulating roller 21.

  As described above, the yarn storage device 11 unwinds the spun yarn 10 when the tension of the spun yarn 10 on the downstream side increases, and the spun yarn 10 when the tension of the spun yarn 10 decreases (the spun yarn 10 seems to be loosened). By operating so as to stop the unwinding of the yarn, the slack of the spun yarn 10 is eliminated and an appropriate tension is applied to the spun yarn 10.

  Next, the configuration of the cleaning device 61 provided in the draft device 7 for cleaning the front bottom roller 28 will be described. As shown in FIG. 3, the cleaning device 61 includes a pad body 100 provided to be able to contact the outer peripheral surface of the front bottom roller 28, a pad support mechanism 63 that supports the pad body 100, and a push lever 31. . The push lever 31 is for separating the pad body 100 from the front bottom roller 28. The pad body 100 is disposed so as to cover a part of the outer peripheral surface of the front bottom roller 28.

  As shown in FIGS. 4A and 4B, the roller contact surface 101 that contacts the outer peripheral surface of the front bottom roller 28 in the pad body 100 has a shape along the outer peripheral surface of the front bottom roller 28. . Specifically, the roller contact surface 101 has an arc shape in cross section. The pad body 100 is made of, for example, a soft resin. The thickness of the pad body 100 is set to a thickness capable of obtaining rigidity capable of pressing the outer peripheral surface of the front bottom roller 28 with a predetermined urging force when the pad body 100 is pressed against the front bottom roller 28. Further, the thickness of the pad body 100 is set to a thickness that can suppress the vibration of the pad body 100 even when the front bottom roller 28 rotates.

  Specifically, the pad body 100 can be formed of ultra high molecular weight polyethylene as an example, and can have a thickness of 1.0 to 1.5 mm. However, although the pad body 100 in this embodiment is clamped by the clip 73, the thickness of the portion clamped by the clip 73 (held portion 110) is thinner than the thickness of the portion where the roller contact surface 101 is formed. It has become. As an example, the length of the roller contact surface 101 in the circumferential direction of the front bottom roller 28 may be a length that covers the outer circumferential surface of an angle range of about 20 degrees in the circumferential direction of the front bottom roller 28.

  The roller contact surface 101 is provided with a plurality of grooves 102 extending in a V shape on the roller contact surface 101. In other words, the plurality of grooves 102 are formed to be inclined with respect to the width direction of the pad body 100 from the center point in the width direction of the pad body 100 (rotational axis direction of the front bottom roller 28) toward the outside. . The direction of the V-shaped groove 102 is such that the outer peripheral surface of the front bottom roller 28 moves from the V-shaped closing side toward the opening side. For example, the groove 102 may have a V-shaped cross section in a direction orthogonal to the direction in which the groove 102 extends.

  As shown in FIGS. 3 and 5, the pad support mechanism 63 is provided at a position opposite to the yarn path of the sliver 13 and the fiber bundle 8 with respect to the front bottom roller 28. The pad support mechanism 63 includes a fixing member 90, a pad support lever 70, a transmission lever 71, a first torsion spring 94, and a second torsion spring 95.

  The fixing member 90 is fixed to a fixed frame 67 supported by the frame 6 of the spinning machine 1. The fixing member 90 includes a main body 85 and a spring force adjustment unit 87. The main body 85 is fixed to the fixed frame 67 by an appropriate means such as a bolt, and supports each part of the pad support mechanism 63. A pad support lever 70 and a transmission lever 71 are rotatably supported by the main body 85. The pad support lever 70 and the transmission lever 71 are supported by the main body 85 such that the center of rotation thereof faces a direction parallel to the axial direction of the front bottom roller 28.

  As shown in FIGS. 5 and 6, the spring force adjusting portion 87 is formed around the portion of the main body 85 that supports the transmission lever 71. The spring force adjusting portion 87 has a plurality of hooking portions 87 a for attaching one end of the first torsion spring 94. The hook portions 87a are arranged in the circumferential direction around the portion of the fixing member 90 that supports the transmission lever 71 while forming an appropriate interval.

  The coil portion of the first torsion spring 94 is inserted through the rotation shaft portion of the transmission lever 71. One end of the spring line of the first torsion spring 94 is fixed so as to be hooked on one of a plurality of hook portions 87a, and the other end is fixed to a transmission lever 71 rotatably supported by the main body 85. The first torsion spring 94 applies a biasing force in a direction in which the pad body 100 approaches the front bottom roller 28 side to the pad support lever 70 via the transmission lever 71.

  Since the spring force adjusting portion 87 is formed with a plurality of hook portions 87a, the operator can appropriately select the position where the first torsion spring 94 is hooked. For example, the first torsion spring 94 may become loose due to long-term use, and the urging force may be weakened. Even in such a case, according to the configuration of the present embodiment, an appropriate biasing force can be transmitted by changing the attachment position of one end of the first torsion spring 94 and increasing the elastic force of the first torsion spring 94. 71.

  As shown in FIG. 5 and the like, the transmission lever 71 includes a transmission lever side driven portion 97 that is pushed by the push lever 31 and a lever contact portion 96 that pushes the pad support lever 70. The transmission lever side driven portion 97 is configured by a tapered arm-like plate-like member protruding downward from the rotation center thereof. The lever contact portion 96 is configured by a plate-like member that protrudes from one end surface of the transmission lever side driven portion 97 so as to be bent toward the pad support lever 70 side. As the transmission lever 71 rotates, the tip end portion of the lever contact portion 96 can come into contact with and press against the lower portion (pad side driven portion 98) of the pad support lever 70.

  The pad support lever 70 includes a clip support portion 72, a clip 73, and a pad side driven portion 98. The clip support part 72 is for supporting the clip 73, and is formed in a substantially L shape in a side view of FIG. One end of the clip support portion 72 is connected to the base portion (rotational shaft portion) of the pad support lever 70, and the clip 73 is attached to the other end. The clip 73 can sandwich the sandwiched portion 110 of the pad body 100 and is sandwiched and fixed by the tip portion of the clip support portion 72.

  The pad side driven portion 98 is configured by an arm-like plate-like member that protrudes downward from the base portion of the pad support lever 70. As shown in FIGS. 3 and 5, the lever contact portion 96 (transmission lever 71) comes into contact with the pad-side driven portion 98 (pad support lever 70) during the spinning operation.

  A restricting member 74 for preventing the pad support lever 70 from rotating too much is attached to the fixed frame 67. The restricting member 74 is a plate-like member and is fixed to the fixed frame 67.

  The coil portion of the second torsion spring 95 is inserted into the rotating shaft portion of the pad support lever 70. One end of the spring line of the second torsion spring 95 is fixed to the transmission lever 71 side, and the other end is fixed to the pad support lever 70 side. The transmission lever 71 and the pad support lever 70 are connected to each other by a second torsion spring 95. The second torsion spring 95 biases the lever contact portion 96 toward the pad-side driven portion 98.

  In the spinning machine 1, an elongated shaft 68 is disposed along a direction parallel to the axial direction of the front bottom roller 28. Each member such as a tensioner bar (not shown in the drawing) for generating tension on the bottom apron belt 27 is attached to the shaft 68. The shaft 68 is supported by the frame 6 of the spinning machine 1 independently of the fixed frame 67.

  As shown in FIGS. 5 and 6, an apron fork 99 as an apron belt position changing member is attached to the shaft 68 via a traverse frame 69. The apron fork 99 has two protrusions, and is fixed to the traverse frame 69 with the bottom apron belt 27 inserted between the two protrusions. The traverse frame 69 is movable in the longitudinal direction of the shaft 68 with respect to the shaft 68, and is connected to a traverse driving device (not shown).

  When the traverse driving device is driven, the apron fork 99 reciprocates along the longitudinal direction of the shaft 68 to traverse the bottom apron belt 27 in a direction substantially parallel to the axial direction of the middle bottom roller 26. Thereby, the contact location of the bottom apron belt 27 and the fiber bundle 8 is always changed, and the local wear of the bottom apron belt 27 can be prevented and the service life can be extended.

  As shown in FIG. 3, the push lever 31 is fixed to a support arm 29 disposed on the downstream side of the draft device 7 (downstream in the transport direction of the fiber bundle 8). The support arm 29 is arranged so as to face substantially in the vertical direction in the height direction of the machine base, and the pneumatic spinning device 9 is fixed to the upper part thereof. The support arm 29 is configured to be rotatable about a support shaft 30 disposed at the lower end thereof. As the push lever 31 moves as the support arm 29 rotates, the contact between the pad body 100 and the front bottom roller 28 can be released. The details of this contact release operation will be described later.

  As shown in FIG. 3, during the spinning operation of the spinning machine 1, the plurality of draft rollers including the front bottom roller 28 are respectively driven to rotate, and the sliver 13 is stretched to generate the fiber bundle 8 to the pneumatic spinning device 9. send. During normal operation, the transmission lever 71 (lever contact portion 96) urged by the spring force of the first torsion spring 94 causes the pad support lever 70 (pad side driven) so that the pad body 100 approaches the front bottom roller 28. Section 98) is energized. As a result, the pad support lever 70 rotates integrally with the transmission lever 71 to bring the roller contact surface 101 of the pad body 100 attached to the clip support portion 72 into contact with the outer peripheral surface of the front bottom roller 28. In this state, the pad body 100 comes into contact with the outer peripheral surface of the front bottom roller 28 at a substantially constant pressure, and foreign matters such as cotton sugar, fluff and dust adhering to the front bottom roller 28 from the sliver 13 or the like are removed from the pad body. Scraped by 100.

  Next, with reference to FIG.6 and FIG.7, the operation | movement which cancels | releases the contact with the pad body 100 and the front bottom roller 28 is demonstrated. When yarn breakage or the like occurs during operation of the spinning machine 1, spinning by the air spinning device 9 is stopped, and drafting by the draft device 7 is also stopped. An actuator (not shown) is connected to the support arm 29 of each spinning unit 2, and a control unit (not shown) operates the actuator of the corresponding spinning unit 2. As a result, the support arm 29 rotates about the support shaft 30 as shown in FIG. That is, the support arm 29 rotates in the direction in which the pneumatic spinning device 9 is separated from the draft device 7. At this time, the push lever 31 moves integrally with the support arm 29 so as to be separated from the pad support mechanism 63.

  As a result, the end of the push lever 31 comes into contact with the transmission lever side driven portion 97 and applies a pressing force to the transmission lever 71 via the transmission lever side driven portion 97. With this pressing force, the transmission lever 71 rotates in a direction against the spring force of the first torsion spring 94. The pad support lever 70 connected to the transmission lever 71 by the second torsion spring 95 rotates so as to follow the rotation of the transmission lever 71, and the pad body 100 is separated from the front bottom roller 28.

  In this way, the pad support lever 70 rotates in conjunction with the operation of the push lever 31, but when the pad support lever 70 rotates by a predetermined angle, the upper end of the regulating member 74 contacts the pad support lever 70, Further rotation is prevented. Even if the transmission lever 71 is rotated in such a direction that the pad body 100 is further separated from the front bottom roller 28 from this state, the displacement of the transmission lever 71 is absorbed by the elastic deformation of the second torsion spring 95 and the pad support lever. 70 does not rotate.

  The present embodiment is configured as described above, and the cleaning device 61 includes the pad body 100 provided so as to be able to contact the outer peripheral surface of the front bottom roller 28. Since the roller contact surface 101 of the pad body 100 is shaped along the outer peripheral surface of the front bottom roller 28, the pad body 100 and the front bottom roller 28 are in surface contact. When the pad body 100 and the front bottom roller 28 are in surface contact, the force received by the pad body 100 when the pad body 100 is pressed against the front bottom roller 28 is distributed over the entire roller contact surface 101. Thereby, it is suppressed that only a part of pad body 100 wears locally, and the wear resistance of pad body 100 can be improved.

  Since the roller contact surface 101 of the pad body 100 is in surface contact with the outer peripheral surface of the front bottom roller 28, the excitation points on the roller contact surface 101 do not concentrate at one place when the front bottom roller 28 rotates. The vibrations at each excitation point can be reduced by being dispersed in a plurality. Thereby, generation | occurrence | production of the noise by the pad body 100 vibrating can be suppressed.

  The thickness of the pad body 100 is set to a thickness that can suppress the vibration of the pad body 100 even when the front bottom roller 28 rotates. Thereby, even if the front bottom roller 28 rotates, generation | occurrence | production of the noise by the pad body 100 vibrating can be suppressed.

  The groove 102 provided in the roller contact surface 101 can be used as a place for air to escape between the roller contact surface 101 of the pad body 100 and the outer peripheral surface of the front bottom roller 28. Thereby, the pressure fluctuation of the air which entered between the pad body 100 and the front bottom roller 28 can be reduced, and the generation of noise due to the air pressure fluctuation can be reduced.

  By confirming the depth of the groove 102, the wear state of the roller contact surface 101 can be easily determined. Thereby, the replacement time of the pad body 100 can be easily grasped.

  The groove 102 extends in a V shape on the roller contact surface 101, and the direction of the V-shaped groove 102 moves in the direction in which the outer peripheral surface of the front bottom roller 28 moves from the V-shaped closed side to the open side. It was. According to this configuration, when the air in the groove 102 moves with the rotation of the front bottom roller 28, the air does not collect in the V-shaped closed side portion of the groove 102, and the V-shaped opening in the groove 102 The air can be diffused toward the end portion on the side, and the air can be discharged to the outside from the V-shaped open end portion of the groove 102. Thereby, generation | occurrence | production of the noise by the pressure change of air can be reduced further.

  Among the plurality of draft rollers provided in the draft device 7, the most downstream draft roller rotates at a higher speed than the other draft rollers. Therefore, the frequency of maintenance of the draft device 7 can be reduced by bringing the pad body 100 having good wear resistance into contact with the front bottom roller 28 that rotates at a high speed. When the pad body 100 is brought into contact with the draft roller, the noise increases as the number of rotations of the draft roller increases. Therefore, the noise generated in the draft device 7 can be effectively suppressed by bringing the pad body 100 provided with the groove 102 into contact with the front bottom roller 28 that rotates at high speed.

  By disposing the pad body 100 so as to cover the outer peripheral surface of the front bottom roller 28, the area of the roller contact surface 101 of the pad body 100 can be increased. By arranging the pad body 100 in this manner, the wear resistance of the pad body 100 can be further improved.

  A cleaning device 61 in which a pad body 100 with good wear resistance is incorporated in a spinning machine 1 including a draft device 7 and an air spinning device 9 that spins a fiber bundle 8 drawn by the draft device 7 by a swirling airflow. By applying, the frequency of maintenance in the spinning machine 1 can be reduced.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, in the present embodiment, the groove 102 provided on the roller contact surface 101 has a V-shaped shape extending on the roller contact surface 101. However, the groove 102 is not limited to a V-shape, for example, a U-shape. Alternatively, the shape may be a linear shape, a curved shape, a shape combining a straight line and a straight line, a shape combining a straight line and a curved line, or the like. The number of grooves 102 provided in the pad body 100 is not particularly limited, and an appropriate number can be provided.

  Although the first torsion spring 94 and the second torsion spring 95 are used for the rotating portion of the pad support lever 70 of the cleaning device 61, a plate spring may be used instead of these springs. When a leaf spring is used, vibration generated in the cleaning device 61 can be suppressed even when the front bottom roller 28 is rotated.

  Although the cleaning device 61 removes the cotton sugar and the like attached to the front bottom roller 28, the cotton sugar and the like attached to other draft rollers such as the middle bottom roller 26 can also be removed.

  As long as the spinning machine includes the draft device 7, the present invention can be applied to other spinning machines that do not include the air spinning device 9.

  DESCRIPTION OF SYMBOLS 1 ... Spinning machine, 8 ... Fiber bundle, 9 ... Pneumatic spinning device, 13 ... Sliver, 28 ... Front bottom roller (draft roller), 61 ... Cleaning device, 100 ... Pad body, 101 ... Roller contact surface, 102 ... Groove.

Claims (7)

A draft roller cleaning device comprising a pad body provided so as to be able to contact the outer peripheral surface of the draft roller,
The roller contact surface in contact with the draft roller in the pad body is formed in a shape along the outer peripheral surface of the draft roller.
Draft roller cleaning device.   The draft roller cleaning device according to claim 1, wherein the roller contact surface is provided with a groove.   The groove extends on the roller contact surface in at least one of a straight line shape, a curved line shape, a combined shape of straight lines and straight lines, and a combined shape of straight lines and curved lines. The draft roller cleaning device according to claim 1. The groove extends in a V shape on the roller contact surface,
The direction of the V-shaped groove is the direction in which the outer peripheral surface of the draft roller moves from the V-shaped closed side to the open side.
The draft roller cleaning device according to claim 3. A plurality of draft rollers for stretching the fiber bundle;
The cleaning device of the draft roller according to any one of claims 1 to 4, wherein the cleaning device is provided for the draft roller at the most downstream in the flow direction of the fiber bundle among the plurality of draft rollers.
A draft device comprising:   The draft device according to claim 5, wherein the pad body is arranged so as to cover an outer peripheral surface of the draft roller. A draft device according to claim 6;
An air spinning device for spinning the fiber bundle drawn by the draft device by a swirling airflow;
Spinning machine equipped with.

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