JP2018204121A - Roller unit, draft machine and spinning machine - Google Patents

Abstract

To provide a roller unit, a draft machine and a spinning machine capable of suppressing an accumulation of cotton fly while allowing easy adjustment.SOLUTION: A back roller unit 40 comprises a back bottom roller 14a, a bearing part 41, a motor M4 and a support member 43. The back bottom roller 14a has a shaft part 48b constituting a rotating shaft. The bearing part 41 cantilevers the back bottom roller 14a so as to be rotatable around the rotating shaft. The motor M4 rotatably drives the back bottom roller 14a around the rotating shaft via a power transmission mechanism 42. The support member 43 supports the bearing part 41 and the motor M4. The back bottom roller 14a is arranged such that a free end side of the back bottom roller 14a projects further than the support member 43 and the motor M4, as viewed from a direction orthogonal to the rotating shaft.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a roller unit, a draft device, and a spinning machine.

  Conventionally, for example, Patent Document 1 describes a twin unit in which two draft devices are attached to a housing. In the twin unit described in Patent Document 1, each draft device includes a number of rollers that can be driven by a motor. The roller is rotatably supported by the housing at two bearing points.

JP 2006-342482 A

  In the above prior art, the fluff may be accumulated around the roller. Moreover, in the said prior art, the adjustment operation | work (for example, a changeover, maintenance, etc.) of a unit becomes complicated, and the said operation | work may take time.

  Therefore, an object of the present invention is to provide a roller unit, a draft device, and a spinning machine that can be easily adjusted while suppressing accumulation of fluff.

  The roller unit according to the present invention includes a first roller having a rotation shaft, a bearing portion that cantilever-supports the first roller so as to be rotatable around the rotation shaft, and the first roller around the rotation shaft via a power transmission mechanism. The first roller includes a motor that rotates and a bearing member and a support member that supports the motor. The first roller protrudes more freely than the support member and the motor when viewed from the direction orthogonal to the rotation axis. Are arranged as follows.

  In this roller unit, a bearing portion that supports the first roller and a motor that rotationally drives the first roller are supported by the same support member to be modularized. Thereby, the necessity of adjusting a power transmission mechanism can be reduced compared with the case where each of a bearing part and a motor is individually supported, for example at the time of adjustment operations, such as a device change and a maintenance. Further, the first roller is cantilevered by the bearing portion, and is arranged so that the free end side of the first roller protrudes beyond the support member and the motor when viewed from the direction orthogonal to the rotation axis. Thereby, the structure in which the fluff hardly deposits around the first roller can be realized. Therefore, it can adjust easily, suppressing accumulation of fluff.

  In the roller unit according to the present invention, the power transmission mechanism includes a first driven pulley provided on the side opposite to the free end side of the first roller, a drive pulley provided on the drive shaft of the motor, and a first driven pulley. And a timing belt spanned around the drive pulley. In this configuration, for example, it is possible to reduce the necessity of adjusting the timing bell at the time of adjustment work such as device change and maintenance.

  In the roller unit according to the present invention, the timing belt may be further bridged on a second driven pulley provided on a second roller different from the first roller. According to this configuration, not only the first roller but also the second roller can be driven to rotate by one motor.

  In the roller unit according to the present invention, the support member includes a first support part that supports the bearing part, and a plate-like second support part that is provided in the first support part and supports the motor, The support part and the motor may be provided on the same surface of the second support part. In this case, the modularized roller unit can be configured compactly.

  In the roller unit according to the present invention, the second support portion may be provided integrally with the first support portion. According to this configuration, the connection between the first support member and the second support member can be made unnecessary, and the configuration of the support member can be simplified in this respect.

  The roller unit according to the present invention may further include a fiber bundle guide member that is attached to the support member and guides the fiber bundle. In this configuration, the fiber bundle guide member can be accurately positioned with respect to the first roller.

  The roller unit according to the present invention may further include a fiber bundle converging member that is attached to the support member and converges the fiber bundle. In this configuration, the fiber bundle converging member can be accurately positioned with respect to the first roller.

  In the roller unit according to the present invention, a space may be provided between the first roller and the motor when viewed from the direction orthogonal to the rotation axis. In this case, it is possible to specifically realize a configuration in which the fluff is less likely to accumulate around the first roller.

  The draft device according to the present invention includes one or a plurality of the roller units, and the first roller of the roller unit constitutes a bottom roller of at least one of a back roller pair, a third roller pair, and a middle roller pair, A position adjusting unit for adjusting the position is further provided.

  The draft device includes the roller unit. Therefore, similarly, it can adjust easily, suppressing accumulation of fluff. Moreover, it can adjust more easily with a position adjustment part.

  The spinning machine according to the present invention includes the draft device, an air spinning device that twists the fiber bundle drafted by the draft device to generate yarn, a drawing device that pulls the yarn from the pneumatic spinning device, and a drawing device that pulls the yarn. And a winding device that winds the yarn around the package.

  The spinning machine includes the draft device. The draft device includes the roller unit. Therefore, similarly, it can adjust easily, suppressing accumulation of fluff. Moreover, it can adjust more easily with a position adjustment part.

  According to the present invention, it is possible to provide a roller unit, a draft device, and a spinning machine that can be easily adjusted while suppressing accumulation of fluff.

It is a front view of a spinning machine provided with the draft device concerning one embodiment. It is a side view of the spinning unit of the spinning machine shown in FIG. FIG. 3 is a perspective view of a back roller unit of the draft device shown in FIG. 2. It is a front view of the principal part of the back roller unit shown in FIG. FIG. 3 is a perspective view of a third roller unit of the draft device shown in FIG. 2. FIG. 3 is a perspective view of a middle roller unit of the draft device shown in FIG. 2. It is a side view of the roller unit which concerns on a modification.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 1, the spinning machine 1 includes a plurality of spinning units 2, a yarn splicing cart 3, a doffing cart (not shown), a first end frame 4, and a second end frame 5. Prepare. The plurality of spinning units 2 are arranged in a line. Each spinning unit 2 generates the yarn Y and winds it on the package P. When the yarn Y is cut by a certain spinning unit 2 or the yarn Y is cut for some reason, the yarn joining cart 3 performs a yarn joining operation with the spinning unit 2. The doffing cart doffs the package P and supplies a new bobbin B to the spinning unit 2 when the package P is full in a spinning unit 2.

  The first end frame 4 accommodates a collecting device that collects the fluff (fiber waste or yarn waste) generated in the spinning unit 2. The second end frame 5 is configured to adjust the air pressure of the compressed air supplied to the spinning machine 1 to supply air to each part of the spinning machine 1 and to supply power to each part of the spinning unit 2. A drive motor and the like are accommodated. The second end frame 5 is provided with a machine control device 100, a display screen 102, and input keys 104. The machine control device 100 centrally manages and controls each part of the spinning machine 1. The display screen 102 can display information on at least one of the setting contents and state of the spinning unit 2. When the operator performs an appropriate operation using the input keys 104, the setting operation of the spinning unit 2 can be performed. The display screen 102 may be a touch panel display, and the touch panel display may be operated instead of the input keys 104.

  As shown in FIGS. 1 and 2, each spinning unit 2 includes a draft device 6, an air spinning device 7, a yarn monitoring device 8, a tension sensor 9, in order from the upstream side in the traveling direction of the yarn Y. A yarn storage device 11, a waxing device 12, and a winding device 13 are provided. The unit controller 10 is provided for each predetermined number of spinning units 2 and controls the operation of the spinning units 2.

  The draft device 6 drafts the fiber bundle (sliver) S. The draft device 6 includes a back roller pair 14, a third roller pair 15, a middle roller pair 16, and a front roller pair 17 in order from the upstream side in the traveling direction of the fiber bundle S.

  The back roller pair 14 includes a drive-side back bottom roller 14a and a driven-side back top roller (first roller) 14b. The back bottom roller 14a and the back top roller 14b are opposed to each other across a travel route for traveling the fiber bundle S. The third roller pair 15 includes a driving-side third bottom roller 15a and a driven-side third top roller 15b. The third bottom roller (first roller) 15a and the third top roller 15b are opposed to each other across a traveling path for traveling the fiber bundle S. The middle roller pair 16 includes a drive-side middle bottom roller (first roller) 16a and a driven-side middle top roller 16b. The middle bottom roller 16a and the middle top roller 16b are opposed to each other across a traveling route for traveling the fiber bundle S. The front roller pair 17 includes a driving-side front bottom roller 17a and a driven-side front top roller 17b. The front bottom roller 17a and the front top roller 17b are opposed to each other across a traveling route for traveling the fiber bundle S.

  The back bottom roller 14a, the third bottom roller 15a, the middle bottom roller 16a, and the front bottom roller 17a are rotated at different rotational speeds by the drive motor provided in the spinning unit 2 so that the downstream roller becomes faster. An apron belt 18a is provided for the middle bottom roller 16a. An apron belt 18b is provided for the middle top roller 16b. The front bottom roller 17 a may be driven by a drive motor in the second end frame 5 that is provided in common to the plurality of spinning units 2.

  The back top roller 14b, the third top roller 15b, the middle top roller 16b, and the front top roller 17b are rotatably supported by a draft cradle (not shown). The back top roller 14b, the third top roller 15b, the middle top roller 16b, and the front top roller 17b are brought into contact with the back bottom roller 14a, the third bottom roller 15a, the middle bottom roller 16a, and the front bottom roller 17a, respectively, with a predetermined pressure. Is driven and rotated.

  The air spinning device 7 generates a yarn Y by twisting the fiber bundle F drafted by the draft device 6 by a swirling air flow. The yarn monitoring device 8 monitors information on the traveling yarn Y between the pneumatic spinning device 7 and the yarn storage device 11, and detects the presence or absence of a yarn defect based on the monitored information. When the yarn monitoring device 8 detects a yarn defect, the yarn monitoring device 8 transmits a yarn defect detection signal to the unit controller 10. The yarn monitoring device 8 detects, for example, an abnormal thickness of the yarn Y or a foreign substance contained in the yarn Y as the yarn defect. The yarn monitoring device 8 also detects yarn breakage and the like. The tension sensor 9 measures the tension of the traveling yarn Y between the pneumatic spinning device 7 and the yarn storage device 11, and transmits a tension measurement signal to the unit controller 10. When the unit controller 10 determines that there is an abnormality based on the detection result of at least one of the yarn monitoring device 8 and the tension sensor 9, the yarn Y is cut in the spinning unit 2. Specifically, the supply of air to the pneumatic spinning device 7 is stopped and the generation of the yarn Y is interrupted, whereby the yarn Y is cut. Alternatively, the yarn Y may be cut by a cutter provided separately.

  The yarn accumulating device 11 takes the slack of the yarn Y between the pneumatic spinning device 7 and the winding device 13. The yarn storage device 11 has a function of stably pulling out the yarn Y from the pneumatic spinning device 7 and constitutes a drawing device that pulls out the yarn Y from the pneumatic spinning device 7. Further, the yarn storage device 11 has a function of retaining the yarn Y sent from the pneumatic spinning device 7 at the time of yarn joining operation by the yarn joining cart 3 and preventing the yarn Y from loosening, and downstream of the yarn storage device 11. It has a function of preventing the fluctuation of the tension of the side yarn Y from being transmitted to the pneumatic spinning device 7. The waxing device 12 applies wax to the yarn Y between the yarn storage device 11 and the winding device 13.

  The winding device 13 forms the package P by winding the yarn Y around the bobbin B. The winding device 13 includes a cradle arm 21, a winding drum 22, and a traverse guide 23. The cradle arm 21 supports the bobbin B so as to be rotatable. The cradle arm 21 is swingably supported by a support shaft 24 and brings the surface of the bobbin B or the surface of the package P into contact with the surface of the winding drum 22 with an appropriate pressure. A drive motor (not shown) provided on the second end frame 5 drives the winding drums 22 of the plurality of spinning units 2 all at once. Thereby, in each spinning unit 2, the bobbin B or the package P is rotated in the winding direction. The traverse guide 23 of each spinning unit 2 is provided on a shaft 25 shared by a plurality of spinning units 2. When the drive motor of the second end frame 5 reciprocates the shaft 25 in the direction of the rotation axis of the winding drum 22, the traverse guide 23 traverses the yarn Y with a predetermined width with respect to the rotating bobbin B or package P.

  When the yarn Y is cut in a certain spinning unit 2 or the yarn Y is cut for some reason, the yarn joining cart 3 travels to the spinning unit 2 and performs a yarn joining operation. The yarn joining cart 3 includes a yarn joining device 26, a suction pipe 27, and a suction mouth 28. The suction pipe 27 is rotatably supported by the support shaft 31, captures the yarn Y from the pneumatic spinning device 7, and guides it to the yarn joining device 26. The suction mouse 28 is rotatably supported by the support shaft 32, captures the yarn Y from the winding device 13, and guides it to the yarn joining device 26. The yarn joining device 26 performs yarn joining between the guided yarns Y. The yarn joining device 26 is a splicer that uses compressed air or a knotter that mechanically joins the yarn Y.

  When the yarn joining cart 3 performs the yarn joining operation, the package P is rotated (reversely rotated) in the anti-winding direction. At this time, the cradle arm 21 is moved by an air cylinder (not shown) so that the package P is separated from the winding drum 22, and the package P is moved by a reverse rotation roller (not shown) provided on the yarn splicing carriage 3. It is rotated backward.

  Next, the draft device 6 described above will be described in more detail. In the following description, the terms “upper” and “lower” are based on the state of the drawing.

  3 and 4, the draft device 6 includes a back roller unit (roller unit) 40 and a rail member 6x. The back roller unit 40 includes the back bottom roller 14a, a bearing portion 41, a motor M4, and a support member 43.

  The back bottom roller 14a has a cylindrical roller body 48a and a columnar shaft portion 48b inserted coaxially with the roller body 48a. The back bottom roller 14a is made of metal. A groove is provided on the outer peripheral surface of the roller body 48a. The outer peripheral surface of the roller body 48 a includes a region that contacts the fiber bundle S. One end of the roller body 48a is fixed to the end of the shaft portion 48b. The shaft portion 48b constitutes a rotation shaft of the back bottom roller 14a.

  The bearing portion 41 cantilever-supports the back bottom roller 14a so as to be rotatable around its rotation axis. In the direction along the rotation axis, a bearing portion 41 is provided at one end of the back bottom roller 14a, and a configuration for supporting the back bottom roller 14a is not provided at the other end. The bearing portion 41 is configured, for example, by having a bearing BG, which is a rolling bearing, coaxially disposed in a housing having a cylindrical outer shape. The bearing portion 41 cantileverably supports the shaft portion 48b in a state where the roller body 48a is positioned on the free end side of the shaft portion 48.

  The motor M4 rotationally drives the back bottom roller 14a around its rotational axis via the power transmission mechanism 42. For example, a step motor is used as the motor M4. The power transmission mechanism 42 includes a first driven pulley 42a provided on an end portion of the shaft portion 48b of the back bottom roller 14a opposite to the free end side, and a drive pulley 42b provided on a drive shaft 49 of the motor M4. And a timing belt 42c spanned between the first driven pulley 42a and the drive pulley 42b. In addition, you may attach the cover which covers the 1st driven pulley 42a, the drive pulley 42b, and the timing belt 42c.

  The support member 43 is a member that supports the bearing portion 41 and the motor M4. The support member 43 includes a frame (first support member) 43a and a bracket (second support member) 43b. A bearing portion 41 is placed on the frame 43 a, and the frame 43 a supports the bearing portion 41. Specifically, the frame 43a is formed in a rectangular block shape. A curved concave portion corresponding to the outer peripheral surface of the bearing portion 41 is provided on the upper surface of the frame 43a. The lower peripheral surface of the bearing portion 41 is fitted into the concave portion of the frame 43a. Thereby, the frame 43a supports the bearing portion 41 from below (the side opposite to the fiber bundle traveling path with respect to the shaft portion 48b). A slide piece 45 arranged in the opening 6y of the rail member 6x is provided on the lower surface of the frame 43a (the surface opposite to the surface on which the bearing portion 41 is provided).

  The bracket 43b has a plate shape. The motor M4 is provided on one surface (first surface) of the bracket 43b so as to be cantilevered. Specifically, the motor M4 is fixed to the first surface of the bracket 43b so that the drive shaft 49 penetrates the bracket 43b and protrudes from the other surface (second surface) of the bracket 43b. The drive pulley 42b is attached to the drive shaft 49 so as to be positioned on the second surface of the bracket 43b.

  The side surface of the frame 43a is in contact with and connected to the first surface of the bracket 43b. That is, the frame 43a and the motor M4 are provided on the same surface of the bracket 43b. The frame 43a is fixed to the bracket 43b such that the shaft portion 48b of the back bottom roller 14a is perpendicular to the bracket 43b. The first driven pulley 42a is attached to the shaft portion 48b so as to be positioned on the second surface side of the bracket 43b. In such a support member 43, the motor M4 is disposed immediately below the frame 43a, and the shaft portion 48b of the back bottom roller 14a is disposed in parallel with the drive shaft 49 of the motor M4.

  In the back roller unit 40, the back bottom roller 14a has a free end side that is more than the support member 43 and the motor M4 when viewed from a direction orthogonal to the shaft portion 48b constituting the rotation shaft (for example, in the state shown in FIG. 4). It is arranged to protrude. Specifically, the roller main body 48a of the back bottom roller 14a is configured to protrude (protrude) in a direction away from the bracket 43b rather than the frame 43a and the motor M4. In other words, a part of the front end side of the roller body 48a is displaced (not overlapping) with respect to the frame 43a and the end of the motor M4 in the rotation axis direction. A space is formed immediately below a portion of the roller body 48a on the tip side. The frame 43a and the motor M4 are not arranged directly below a part of the roller body 48a on the front end side. A space is provided between the back bottom roller 14a and the motor M4 when viewed from the direction orthogonal to the rotation axis of the back bottom roller 14a.

  The back roller unit 40 includes a fiber bundle guide member 77 that guides the fiber bundle S. The fiber bundle guide member 77 is a member called a trumpet and has a cylindrical shape having a trumpet tip shape (so-called bell mouth shape) on the upstream side. The fiber bundle guide member 77 has the fiber bundle S inserted through the cylinder. The fiber bundle guide member 77 is attached to the frame 43a of the support member 43 via a fixture 77a.

  The rail member 6x is a long member along the traveling direction of the fiber bundle S. An opening 6y extending along the traveling direction of the fiber bundle S is formed on the upper surface of the rail member 6x. The rail member 6x is fixed to a spinning frame supported by the main body frame (not shown). The main body frame is a frame constituting the entire spinning machine 1. The spinning frame is a frame that supports the apparatuses included in each spinning unit 2 or a predetermined number of spinning units 2. The slide piece 45 is provided so as to be movable along the longitudinal direction of the opening 6y. The back roller unit 40 is fixed to the rail member 6x after the draft device 6 is adjusted. As a result, the slide piece 45 is moved along the opening 6y, so that the position of the back bottom roller 14a and the back roller unit 40 rotatably supported by the bearing portion 41 on the frame 43a and the frame 43a is changed to the fiber bundle S. It can be adjusted along the traveling direction. The rail member 6x and the slide piece 45 constitute a position adjusting unit that adjusts the position of the back roller unit 40.

  As shown in FIG. 5, the draft device 6 includes a third roller unit (roller unit) 50. The third roller unit 50 includes the third bottom roller 15a, a bearing portion 51, a motor M5, and a support member 53.

  The third bottom roller 15a includes a cylindrical roller body 58a and a columnar shaft portion 58b inserted coaxially with the roller body 58a. The third bottom roller 15a is made of metal. A groove is provided on the outer peripheral surface of the roller body 58a. The outer peripheral surface of the roller main body 58a includes a region in contact with the fiber bundle S. One end of the roller body 58a is fixed to the end of the shaft portion 58b. The shaft portion 58b constitutes the rotation shaft of the third bottom roller 15a.

  The bearing portion 51 cantileverally supports the third bottom roller 15a so as to be rotatable around its rotation axis. The bearing portion 51 is configured by, for example, a bearing BG that is a rolling bearing disposed coaxially in a housing having a cylindrical outer shape. The bearing portion 51 cantileverably supports the shaft portion 58b in a state where the roller body 58a is positioned on the free end side of the shaft portion 58b.

  The motor M5 rotationally drives the third bottom roller 15a around its rotation axis via the power transmission mechanism 52. For example, a step motor is used as the motor M5. The power transmission mechanism 52 includes a first driven pulley 52a provided at an end portion of the shaft portion 58b of the third bottom roller 15a opposite to the free end side, and a drive pulley 52b provided on the drive shaft 59 of the motor M5. And a timing belt 52c spanned between the first driven pulley 52a and the driving pulley 52b.

  The support member 53 is a member that supports the bearing portion 51 and the motor M5. The support member 53 includes a frame (first support member) 53a and a bracket (second support member) 53b. A bearing portion 51 is placed on the frame 53 a, and the frame 53 a supports the bearing portion 51. Specifically, the frame 53a is formed in a rectangular block shape. A curved concave portion corresponding to the outer peripheral surface of the bearing portion 51 is provided on the upper surface of the frame 53a. The lower peripheral surface of the bearing portion 51 is fitted in the concave portion of the frame 53a. As a result, the frame 53a supports the bearing portion 51 from below (the side opposite to the fiber bundle traveling path with respect to the shaft portion 58b). A slide piece 55 disposed in the opening 6y of the rail member 6x is provided on the lower surface of the frame 53a (the surface opposite to the surface on which the bearing portion 51 is provided).

  The bracket 53b has a plate shape. The motor M5 is cantilevered on one surface (first surface) of the bracket 53b. Specifically, the motor M5 is fixed to the first surface of the bracket 53b so that the drive shaft 59 penetrates the bracket 53b and protrudes from the other surface (second surface) of the bracket 53b. The drive pulley 52b is attached to the drive shaft 59 so as to be positioned on the second surface of the bracket 53b.

  The side surface of the frame 53a is in contact with and connected to the first surface of the bracket 53b. That is, the frame 53a and the motor M5 are provided on the same surface of the bracket 53b. The frame 53a is fixed to the bracket 53b such that the shaft portion 58b of the third bottom roller 15a is perpendicular to the bracket 53b. The first driven pulley 52a is attached to the shaft portion 58b so as to be positioned on the second surface side of the bracket 53b. In such a support member 53, the motor M5 is disposed immediately below the frame 53a, and the shaft portion 58b of the third bottom roller 15a is disposed in parallel with the drive shaft 59 of the motor M5.

  In the third roller unit 50, the third bottom roller 15a is arranged so that the free end side protrudes beyond the support member 53 and the motor M5 when viewed from the direction orthogonal to the shaft portion 58b constituting the rotation shaft. Specifically, the roller main body 58a of the third bottom roller 15a is configured to protrude (protrude) in a direction away from the bracket 53b rather than the frame 53a and the motor M5. In other words, a part of the front end side of the roller body 58a is displaced (not overlapping) with respect to the frame 53a and the end of the motor M5 in the rotation axis direction. A space is formed immediately below a portion of the roller body 58a on the tip side. The frame 53a and the motor M5 are not arranged immediately below a part of the roller body 58a on the front end side. A space is provided between the third bottom roller 15a and the motor M5 when viewed from the direction orthogonal to the rotation axis of the third bottom roller 15a.

  The slide piece 55 is arranged to be movable along the longitudinal direction of the opening 6y of the rail member 6x. The third roller unit 50 is fixed to the rail member 6x after the draft device 6 is adjusted. Accordingly, the slide piece 55 is moved along the opening 6y, so that the position of the third bottom roller 15a and the third roller unit 50 rotatably supported by the bearing portion 51 on the frame 53a and the frame 53a is changed to the fiber bundle S. It can be adjusted along the traveling direction. The rail member 6x and the slide piece 55 constitute a position adjusting unit that adjusts the position of the third roller unit 50.

  As shown in FIG. 6, the draft device 6 includes a middle roller unit (roller unit) 60. The middle roller unit 60 includes the middle bottom roller 16a, a bearing portion 61, a motor M6, and a support member 63. In FIG. 6, the apron belt 18a (see FIG. 2) is omitted.

  The middle bottom roller 16a has a cylindrical roller body 68a and a columnar shaft portion 68b inserted coaxially into the roller body 68a. The middle bottom roller 16a is made of metal. A groove is provided on the outer peripheral surface of the roller body 68a. The outer peripheral surface of the roller main body 68a includes a region in contact with the fiber bundle S. One end of the roller body 68a is fixed to the end of the shaft portion 68b. The shaft portion 68b constitutes the rotation shaft of the middle bottom roller 16a.

  The bearing portion 61 cantileverally supports the middle bottom roller 16a so as to be rotatable around its rotation axis. The bearing portion 61 is configured by, for example, a bearing BG, which is a rolling bearing, coaxially disposed in a housing having a cylindrical outer shape. The bearing portion 61 cantileverably supports the shaft portion 68b in a state where the roller body 68a is positioned on the free end side.

  The motor M6 rotationally drives the middle bottom roller 16a around its rotation axis via the power transmission mechanism 62. For example, a step motor is used as the motor M6. The power transmission mechanism 62 includes a first driven pulley 62a provided at the end of the shaft portion 68b of the middle bottom roller 16a opposite to the free end side, and a drive pulley 62b provided on the drive shaft 69 of the motor M6. And a timing belt 62c spanned between the first driven pulley 62a and the drive pulley 62b.

  The support member 63 is a member that supports the bearing portion 61 and the motor M6. The support member 63 includes a frame (first support member) 63a and a bracket (second support member) 63b. A bearing portion 61 is placed on the frame 63 a, and the frame 63 a supports the bearing portion 61. Specifically, the frame 63a is formed in a rectangular block shape. A curved concave portion corresponding to the outer peripheral surface of the bearing portion 61 is provided on the upper surface of the frame 63a. The lower peripheral surface of the bearing portion 61 is fitted in the concave portion of the frame 63a. Thereby, the frame 63a supports the bearing portion 61 from below (the side opposite to the fiber bundle traveling path with respect to the shaft portion 68b). A slide piece 65 disposed in the opening 6y of the rail member 6x is provided on the lower surface of the frame 63a (the surface opposite to the surface on which the bearing portion 61 is provided).

  The bracket 63b has a plate shape. The motor M6 is cantilevered on one surface (first surface) of the bracket 63b. Specifically, the motor M6 is fixed to the first surface of the bracket 63b so that the drive shaft 69 penetrates the bracket 63b and protrudes from the other surface (second surface) of the bracket 63b. The drive pulley 62b is attached to the drive shaft 69 so as to be positioned on the second surface of the bracket 63b.

  The side surface of the frame 63a supporting the bearing portion 61 is in contact with and connected to the first surface of the bracket 63b. That is, the frame 63a and the motor M6 are provided on the same surface of the bracket 63b. The frame 63a is fixed to the bracket 63b such that the shaft portion 68b of the middle bottom roller 16a is perpendicular to the bracket 63b. The first driven pulley 62a is attached to the shaft portion 68b so as to be positioned on the second surface side of the bracket 63b. In such a support member 63, the motor M6 is disposed immediately below the frame 56a, and the shaft portion 68b of the middle bottom roller 16a is disposed in parallel with the drive shaft 69 of the motor M6.

  In the middle roller unit 60, the middle bottom roller 16a is arranged such that the free end side protrudes beyond the support member 63 and the motor M6 when viewed from the direction orthogonal to the shaft portion 68b constituting the rotation shaft. Specifically, the roller main body 68a of the middle bottom roller 16a is configured to protrude (protrude) in a direction away from the bracket 63b with respect to the frame 63a and the motor M6. In other words, a part of the front end side of the roller main body 68a is displaced (not overlapping) with respect to the frame 63a and the ends of the motor M6 in the rotation axis direction. A space is formed immediately below a part of the front end side of the roller body 68a. The frame 63a and the motor M6 are not arranged directly below a part of the roller body 68a on the front end side. A space is provided between the middle bottom roller 16a and the motor M6 when viewed from the direction orthogonal to the rotation axis of the middle bottom roller 16a.

  The middle roller unit 60 further includes a fiber bundle converging member 64 that converges the fiber bundle S. The fiber bundle converging member 64 is disposed between the third roller pair 15 and the middle roller pair 16. The fiber bundle converging member 64 is attached to the frame 63 a of the support member 63. The fiber bundle converging member 64 is called, for example, a sliver guide or a capacitor. The fiber bundle converging member 64 is formed with a through hole 64a through which the fiber bundle S is passed. The fiber bundle converging member 64 regulates the path along which the fiber bundle S travels, and regulates the width of the fiber bundle S in the rotation axis direction of the middle bottom roller 16a to the width of the through hole 64a.

  The slide piece 65 is arranged to be movable along the longitudinal direction of the opening 6y of the rail member 6x. The middle roller unit 60 is fixed to the rail member 6x after the draft device 6 is adjusted. Accordingly, the slide piece 65 is moved along the opening 6y, so that the position of the middle bottom roller 16a and the middle roller unit 60 rotatably supported by the bearing portion 61 on the frame 63a and the frame 63a is changed to the fiber bundle S. It can be adjusted along the traveling direction. The rail member 6x and the slide piece 65 constitute a position adjusting unit that adjusts the position of the middle roller unit 60.

  The front bottom roller 17a is cantilevered by a bearing portion supported by the spinning frame so as to be rotatable about the rotation axis of the front bottom roller 17a.

  As described above, in the back roller unit 40, the bearing portion 41 that supports the back bottom roller 14a and the motor M4 are supported by the same support member 43 to be modularized. Thereby, the necessity of adjusting the power transmission mechanism 42 can be reduced as compared with the case where each of the bearing portion 41 and the motor M4 is individually supported at the time of adjustment work such as, for example, device change and maintenance. Further, the back bottom roller 14a is cantilevered by the bearing portion 41, and the free end side of the back bottom roller 14a protrudes beyond the support member 43 and the motor M4 when viewed from the direction orthogonal to the rotation axis. Is arranged. Thereby, it is possible to realize a configuration in which the fluff hardly accumulates around the back bottom roller 14a.

  The third roller unit 50 is also modularized, and for example, it is possible to reduce the necessity of adjusting the power transmission mechanism 52 at the time of adjustment work such as rework and maintenance. It is possible to realize a configuration in which the fluff hardly accumulates around the third bottom roller 15a. The middle roller unit 60 is also modularized, and for example, it is possible to reduce the necessity of adjusting the power transmission mechanism 62 at the time of adjustment work such as rework and maintenance. It is possible to realize a configuration in which the fluff hardly accumulates around the middle bottom roller 16a.

  Therefore, in the back roller unit 40, the third roller unit 50, the middle roller unit 60, the draft device 6 including these, and the spinning machine 1 including the draft device 6, the draft device 6 is controlled while suppressing the accumulation of fluff. It can be adjusted easily. Also, the adjustment work time can be shortened. Space can be saved as compared with the conventional configuration.

  In particular, the power transmission mechanism 42 of the back roller unit 40 includes a timing belt 42c spanned between the first driven pulley 42a and the drive pulley 42b. The power transmission mechanism 52 of the third roller unit 50 includes a timing belt 52c spanned between the first driven pulley 52a and the driving pulley 52b. The power transmission mechanism 62 of the middle roller unit 60 includes a timing belt 62c that is stretched over a first driven pulley 62a and a drive pulley 62b. According to these configurations, for example, it is possible to reduce the necessity of adjusting the timing belts 42c, 52c, and 62c each time adjustment work such as re-seat and maintenance.

  In the support member 43 of the back roller unit 40, the frame 43a and the motor M4 are provided on the same surface of the bracket 43b. In the support member 53 of the third roller unit 50, the frame 53a and the motor M5 are provided on the same surface of the bracket 53b. In the support member 63 of the middle roller unit 60, the frame 63a and the motor M6 are provided on the same surface of the bracket 63b. According to these structures, each roller unit 40, 50, 60 modularized can be comprised compactly.

  The back roller unit 40 further includes a fiber bundle guide member 77. In this configuration, the fiber bundle guide member 77 can be accurately positioned with respect to the back bottom roller 14a. In this configuration, the roller unit can be applied to the back roller pair 14, and the first roller of the roller unit can be configured as the back bottom roller 14 a of the back roller pair 14.

  The middle roller unit 60 further includes a fiber bundle converging member 64. In this configuration, the fiber bundle converging member 64 can be accurately positioned with respect to the middle bottom roller 16a. In this configuration, the roller unit can be applied to the middle roller pair 16, and the first roller of the roller unit can be configured as the middle bottom roller 16 a of the middle roller pair 16.

  In the back roller unit 40, a space is provided between the back bottom roller 14a and the motor M4 when viewed from the direction orthogonal to the rotation axis, so that the fluff hardly accumulates around the back bottom roller 14a. . In the third roller unit 50, since a space is provided between the third bottom roller 15a and the motor M5 when viewed from the direction orthogonal to the rotation axis, the fluff hardly accumulates around the third bottom roller 15a. In the middle roller unit 60, since a space is provided between the middle bottom roller 16a and the motor M6 when viewed from the direction orthogonal to the rotation axis, the fluff hardly accumulates around the middle bottom roller 16a.

  The draft device 6 includes a rail member 6 x and a slide piece 45 as a position adjusting unit that adjusts the position of the back roller unit 40. The draft device 6 includes a rail member 6 x and a slide piece 55 as a position adjusting unit that adjusts the position of the third roller unit 50. The draft device 6 includes a rail member 6 x and a slide piece 65 as a position adjusting unit that adjusts the position of the middle roller unit 60. Thereby, in the spinning machine 1 which comprises the draft apparatus 6 and the draft apparatus 6, the draft apparatus 6 can be adjusted more easily by the said position adjustment part.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

  In the above embodiment, the brackets 43b, 53b, 63b are provided separately from the frames 43a, 53a, 63a, respectively, but the brackets 43b, 53b, 63b are provided integrally with the frames 43a, 53a, 63a, respectively. Also good. According to this configuration, the connection between the brackets 43b, 53b, and 63b and the frames 43a, 53a, and 63a can be made unnecessary, and the configuration of the support members 43, 53, and 63 can be simplified in this respect.

  In the above embodiment, the yarn accumulating device 11 constitutes a drawing device, and the yarn accumulating device 11 draws the yarn Y from the pneumatic spinning device 7. However, the yarn Y may be drawn from the pneumatic spinning device 7 by the delivery roller and the nip roller. . When the yarn Y is pulled out from the pneumatic spinning device 7 by the delivery roller and the nip roller, a slack tube or a mechanical compensator that absorbs slackness of the yarn Y by a suction air flow may be provided instead of the yarn accumulating device 11.

  In the above embodiment, in the machine height direction, each device is arranged so that the yarn Y supplied on the upper side is wound on the lower side, but each device has the yarn Y supplied on the lower side. You may arrange | position so that it may be wound up by the upper side. That is, in the above embodiment, the yarn Y travels from the upper side to the lower side in the height direction of the spinning unit 2, but the traveling direction of the yarn Y is not limited, and for example, from the lower side to the upper side in the height direction of the spinning unit 2. Alternatively, the yarn Y may travel.

  In the above embodiment, the timing belts 42c, 52c, and 62c are bridged over the first driven pulleys 42a, 52a, and 62a and the drive pulleys 42b, 52b, and 62b in each of the roller units 40, 50, and 60. It is not limited to. In the roller unit, the timing belt may be further bridged around a second driven pulley provided on a second roller different from the first roller. Thereby, not only the first roller but also the second roller can be driven to rotate by one motor. As such a configuration, for example, the configuration of the roller unit 80 shown in FIG. 7 may be adopted.

  The roller unit 80 includes a back bottom roller 14a and a third bottom roller 15a via a back bottom roller (first roller) 14a and a third bottom roller (second roller) 15a, bearing portions 41 and 51, and a power transmission mechanism 82. A motor M8 that rotates and a bearing member 41, 51 and a support member 83 that supports the motor M8 are provided. The support member 83 includes a frame 83a on which the bearing portions 41 and 51 are placed to support the bearing portions 41 and 51, and a plate-like bracket 83b that is provided on the frame 83a and supports the motor M8. The power transmission mechanism 82 includes a first driven pulley 82a provided on the back bottom roller 14a, a second driven pulley 82b provided on the third bottom roller 15a, and a drive pulley 82c provided on the drive shaft 89 of the motor M8. A timing belt 82d spanning the first driven pulley 82a, the second driven pulley 82b, and the driving pulley 82c. In such a roller unit 80, one or a plurality of idler pulleys may be provided, and a timing belt 82d may be further bridged around the idler pulley.

  In the above-described embodiment, the draft device 6 includes the back roller unit 40, the third roller unit 50, and the middle roller unit 60. However, the draft device 6 may include at least one of them. That is, the roller unit according to the present invention may be applied to at least one of the back roller pair 14, the third roller pair 15, and the middle roller pair 16. When the roller unit of the present invention is not applied to the middle roller pair 16, the middle bottom roller 16 a may be driven by a drive motor in the second end frame 5 that is provided in common for the plurality of spinning units 2.

  In at least one of the above-described embodiment and the above-described modification, the timing belt is tensioned by adjusting the position of the motor supported by the support member (for example, adjusting the vertical position at which the motor is fixed in the bracket). You may adjust.

  The tension sensor 9 may be disposed on the upstream side of the yarn monitoring device 8 in the traveling direction of the yarn Y. The unit controller 10 may be provided for each spinning unit 2. In the spinning unit 2, the waxing device 12, the tension sensor 9, and the yarn monitoring device 8 may be omitted. The power transmission mechanisms 42, 52, 62 are not particularly limited to the above-described mechanism, and various known mechanisms can be employed. The spinning machine may be other than the spinning machine 1 having the air spinning device 7, for example, a ring spinning machine. The material and shape of each component are not limited to the materials and shapes described above, and various materials and shapes can be employed.

  The back roller unit 40 may be provided with a guide member that guides the lower end of the fiber bundle downstream of the back bottom roller 14a. A cleaning member may be provided for at least one of the back bottom roller 14a and the middle bottom roller 16a. The cleaning member may include a magnet inside and a resin outer casing. In this case, a stopper for preventing and positioning the cleaning member may be provided on the first support portion.

  The roller unit of the present invention can also be applied to a delivery roller of a yarn feeding device that nips and feeds the yarn Y generated by the pneumatic spinning device 7. That is, the first roller may be a delivery roller. The bearing unit may support the delivery roller in a cantilevered manner. The motor may rotationally drive the delivery roller via a power transmission mechanism. The support member may support the bearing portion and the motor. The delivery roller may be arranged so that the free end side of the delivery roller protrudes beyond the support member and the motor when viewed from the direction orthogonal to the rotation axis.

  DESCRIPTION OF SYMBOLS 1 ... Spinning machine, 6 ... Draft device, 6x ... Rail member (position adjustment part), 7 ... Pneumatic spinning device, 11 ... Yarn storage device (drawing device), 13 ... Winding device, 14 ... Back roller pair, 14a ... Back bottom roller (first roller, bottom roller), 15 ... Third roller pair, 15a ... Third bottom roller (first roller, bottom roller), 16 ... Middle roller pair, 16a ... Middle bottom roller (first roller, bottom roller) , 40... Back roller unit (roller unit) 41, 51, 61. Bearing part, 42, 52, 62... Power transmission mechanism, 42 a, 52 a, 62 a, 82 a ... First driven pulley, 42 b, 52 b, 62 b, 82c ... Drive pulley, 42c, 52c, 62c, 82d ... Timing belt, 43, 53, 63, 83 ... Support member, 43a, 53a, 63 , 83a ... Frame (first support part), 43b, 53b, 63b, 83b ... Bracket (second support part), 45, 55, 65 ... Slide piece (position adjustment part), 49, 59, 69, 89 ... Drive Shaft 50 ... Third roller unit (roller unit) 60 ... Middle roller unit (roller unit) 64 ... Fiber bundle converging member 77 ... Fiber bundle guide member 80 ... Roller unit 82b ... Second driven pulley M4 M5, M6, M8 ... motor, S ... fiber bundle.

Claims (10)

A first roller having a rotation axis;
A bearing portion that cantilever-supports the first roller so as to be rotatable about the rotation axis;
A motor for rotating the first roller around the rotation axis via a power transmission mechanism;
A support member for supporting the bearing unit and the motor,
The first roller is a roller unit arranged such that a free end side of the first roller protrudes from the support member and the motor when viewed from a direction orthogonal to the rotation axis. The power transmission mechanism is
A first driven pulley provided on a side opposite to the free end side of the first roller;
A drive pulley provided on the drive shaft of the motor;
The roller unit according to claim 1, further comprising: a timing belt spanned between the first driven pulley and the driving pulley.   The roller unit according to claim 2, wherein the timing belt is further stretched over a second driven pulley provided on a second roller different from the first roller. The support member is
A first support part for supporting the bearing part;
A plate-like second support part that is provided on the first support part and supports the motor;
The roller unit according to claim 1, wherein the first support part and the motor are provided on the same surface of the second support part.   The roller unit according to claim 4, wherein the second support part is provided integrally with the first support part.   The roller unit according to any one of claims 1 to 5, further comprising a fiber bundle guide member that is attached to the support member and guides the fiber bundle.   The roller unit according to claim 1, further comprising a fiber bundle converging member attached to the support member and converging the fiber bundle.   The roller unit according to claim 1, wherein a space is provided between the first roller and the motor when viewed from a direction orthogonal to the rotation axis. One or a plurality of roller units according to any one of claims 1 to 8,
The first roller of the roller unit constitutes a bottom roller of at least one of a back roller pair, a third roller pair, and a middle roller pair,
A draft device further comprising a position adjusting unit for adjusting the position of the roller unit. A draft device according to claim 9;
An air spinning device for producing a yarn by twisting the fiber bundle drafted by the draft device;
A drawing device for pulling out the yarn from the pneumatic spinning device;
A spinning machine comprising: a winding device that winds the yarn drawn by the drawing device around a package.

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