JP2016102267A - Fiber collecting apparatus, drafting apparatus and spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber collecting apparatus capable of efficiently collecting fiber pieces applicable to various types of fiber, a drafting apparatus and a spinning machine.SOLUTION: A fiber collecting apparatus 80 includes a body part 81 having a suction channel 83, and a suction port adjustment part 82 for adjusting at least one of a shape and a position of a suction port 84 connected to the suction channel 83.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a fiber recovery device, a draft device, and a spinning machine.

  A plurality of pairs of rollers for drafting a fiber bundle and fiber pieces generated by the plurality of pairs of rollers (so-called cotton wool, including fiber pieces such as cotton and other natural fibers or synthetic fibers; the same applies hereinafter). There is known a draft device including a fiber recovery device for recovery (see, for example, Patent Document 1).

JP 2003-193339 A

  In the draft device as described above, depending on the type of fiber, the fiber piece may not be collected efficiently.

  Then, an object of this invention is to provide the fiber collection | recovery apparatus, draft apparatus, and spinning machine which can collect | recover a fiber piece efficiently even if the kind of fiber changes.

  The fiber recovery device of the present invention includes a main body portion provided with a suction path, and a suction port adjustment unit that adjusts at least one of the shape and position of the suction port connected to the suction path.

  In the fiber recovery apparatus, at least one of the shape and position of the suction port can be appropriately adjusted according to the type of fiber. Therefore, according to the said fiber collection | recovery apparatus, even if the kind of fiber changes, it becomes possible to collect | recover a fiber piece efficiently.

  In the fiber recovery apparatus of the present invention, the suction port may be provided in the suction port adjustment unit, and the suction port adjustment unit may be detachable from the main body unit. According to this, at least one of the shape and position of the suction port can be adjusted with a simple configuration.

  The fiber recovery device of the present invention may further include a positioning unit for positioning the main body with respect to the mounting target. According to this, even when at least one of the shape and position of the suction port is adjusted, the suction port can be aligned with a desired position on the mounting target.

  In the fiber recovery apparatus of the present invention, an inclined surface from the suction port to the connection port of the suction path may be provided between the suction port and the suction path. According to this, the fiber piece can be smoothly moved from the suction port to the suction path via the inclined surface. Therefore, it becomes possible to collect the fiber pieces more efficiently.

  The fiber recovery apparatus of the present invention may further include a flow rate adjusting unit that adjusts the suction air flow rate from the suction port. According to this, collection | recovery of a fiber piece can be implemented with the appropriate suction air flow volume according to the kind etc. of fiber.

  The draft device of the present invention has a pair of a bottom roller and a top roller, respectively, and faces at least three pairs of rollers for drafting a fiber bundle and a bottom roller of a third pair of rollers from the downstream side in the draft direction. A fiber recovery device provided with only one suction port, and when the distance between adjacent roller pairs is a first distance for drafting a fiber bundle mainly containing synthetic fiber, When at least one of the shape and position of the suction port is in the first state and the distance between adjacent roller pairs is the second distance for drafting a fiber bundle mainly containing cotton fibers, At least one of the shape and the position is set to the second state, and the end of the suction port on the downstream side in the draft direction is positioned more downstream in the draft direction in the second state than in the first state.

  In the vicinity of the bottom roller of the third pair of rollers from the downstream side in the draft direction, fiber pieces are likely to be generated due to fiber winding or the like. As a countermeasure, in the draft device, only one suction port of the fiber recovery device faces the bottom roller of the third roller pair. Further, when a fiber bundle mainly containing cotton fibers is drafted, fiber pieces are likely to be generated even near the bottom roller of the second roller pair from the downstream side in the draft direction. As a countermeasure, in the draft device, when drafting a fiber bundle mainly containing cotton fibers, when drawing a fiber bundle mainly containing synthetic fibers, the end of the suction port is downstream in the draft direction. Located in. Therefore, in the said draft apparatus, even if the kind of fiber changes, it becomes possible to collect | recover a fiber piece efficiently. The “fiber bundle mainly containing cotton fibers” is a fiber bundle in which the mixing ratio of 100% cotton is 50% or more. The “fiber bundle mainly containing synthetic fiber” is a fiber bundle in which the mixing ratio of 100% cotton is less than 50%, and the average fiber length of the synthetic fiber is from 32 mm to 51 mm.

  In the draft device of the present invention, the fiber recovery device includes a main body portion provided with a suction path, and a suction port adjustment unit that adjusts at least one of the shape and position of the suction port connected to the suction path. Also good. According to this, at least one of the shape and position of the suction port can be appropriately adjusted according to the type of fiber.

  In the draft device of the present invention, the fiber recovery device may further include a positioning portion for positioning the main body portion with respect to the bottom roller of the third pair of rollers from the downstream side in the draft direction. According to this, even when at least one of the shape and the position of the suction port is adjusted, the suction port can be positioned in the vicinity of the bottom roller of the third roller pair in which fiber pieces are easily generated.

  The draft device of the present invention may further include a cleaning device provided for at least one of the bottom rollers of the third or more pairs of rollers from the downstream side in the draft direction. According to this, it is possible to remove the fibers from the bottom roller of the third pair or more of the pair of rollers, in which the fibers easily roll up. The removed fiber is recovered as a fiber piece by a fiber recovery device.

  The spinning machine of the present invention includes the draft device, an air spinning device that generates a yarn by twisting the fiber bundle drafted by the draft device, and a winding device that winds the yarn generated by the air spinning device into a package. And comprising.

  According to the spinning machine, since the draft device is provided, the fiber pieces can be efficiently collected even if the type of the fiber changes.

  ADVANTAGE OF THE INVENTION According to this invention, even if the kind of fiber changes, it becomes possible to provide the fiber collection | recovery apparatus, draft apparatus, and spinning machine which can collect | recover a fiber piece efficiently.

It is a front view of the spinning machine of one embodiment of the present invention. It is a side view of the spinning unit of the spinning machine of FIG. FIG. 3 is a plan view of a draft device of the spinning unit in FIG. 2. FIG. 3 is a side view of the drafting device of the spinning unit of FIG. 2. It is sectional drawing of the fiber collection | recovery apparatus of the draft apparatus of FIG. It is a top view of the fiber collection | recovery apparatus of the draft apparatus of FIG. It is sectional drawing of the fiber collection | recovery apparatus of the draft apparatus of FIG. It is a top view of the fiber collection | recovery apparatus of the draft apparatus of FIG.

  Hereinafter, 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 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. I have. 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 collection device for collecting fiber waste and yarn waste generated in the spinning unit 2. The second end frame 5 is configured to adjust the air pressure of the compressed air (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 or the like is stored. The second end frame 5 is provided with a machine control device 41, a display screen 42, and input keys 43. The machine control device 41 centrally manages and controls each part of the spinning machine 1. The display screen 42 can display information related to the setting contents and / or status of the spinning unit 2. When the operator performs an appropriate operation using the input key 43, the setting operation of the spinning unit 2 can be performed.

  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 a sliver (fiber bundle) 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 sliver S. Each roller pair 14, 15, 16 and 17 has a bottom roller and a top roller. The bottom roller is rotationally driven by a drive motor provided in the second end frame 5 or a drive motor provided in each spinning unit 2. An apron belt 18 a is provided for the bottom roller of the middle roller pair 16. An apron belt 18 b is provided for the top roller of the middle roller pair 16.

  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. More specifically (however, illustration is omitted), the pneumatic spinning device 7 includes a spinning chamber, a fiber guide portion, a swirling air flow generation nozzle, and a hollow guide shaft body. The fiber guide unit guides the fiber bundle F supplied from the upstream draft device 6 into the spinning chamber. The swirling air flow generating nozzle is disposed around the path along which the fiber bundle F travels, and generates a swirling air flow in the spinning chamber. By this swirling air flow, the fiber ends of the plurality of fibers constituting the fiber bundle F are reversed and swirled. The hollow guide shaft body guides the yarn Y from the spinning chamber to the outside of the pneumatic spinning device 7.

  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 and / or a foreign matter 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 the yarn monitoring device 8 and / or 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 waxing device 12 applies wax to the yarn Y between the yarn storage device 11 and the winding device 13.

  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 retains the yarn Y sent out from the pneumatic spinning device 7 at the time of yarn joining operation by the yarn joining cart 3, etc. And a function of preventing the fluctuation in the tension of the yarn Y on the downstream side of the yarn accumulating device 11 from being transmitted to the pneumatic spinning device 7.

  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 has 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, a piecer that uses seed yarn, 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.

  The draft device 6 described above will be described in more detail. As shown in FIGS. 3 and 4, the back roller pair 14 includes a back bottom roller 14 a and a back top roller 14 b that are opposed to each other with a travel route R that causes the sliver S to travel. The third roller pair 15 includes a third bottom roller 15a and a third top roller 15b that face each other across the travel route R. The middle roller pair 16 includes a middle bottom roller 16a and a middle top roller 16b that are opposed to each other with the travel route R in between. An apron belt 18a is hung on the middle bottom roller 16a. An apron belt 18b is hung on the middle top roller 16b. The front roller pair 17 includes a front bottom roller 17a and a front top roller 17b that face each other across the travel route R.

  The plurality of roller pairs 14, 15, 16, and 17 cause the sliver S supplied from the cans (not shown) to run from the upstream side to the downstream side while drafting, and supply the fiber bundle F to the air spinning device 7. Hereinafter, the direction along the travel route R is referred to as “draft direction”. The upstream side in the draft direction is simply referred to as “upstream side”, and the downstream side in the draft direction is simply referred to as “downstream side”.

  The back bottom roller 14 a is rotatably supported by the back roller housing 61. The third bottom roller 15a is rotatably supported by the third roller housing 62. The middle bottom roller 16a is rotatably supported by the middle roller housing 63. The front bottom roller 17a is rotatably supported by the front roller housing 64. The bottom rollers 14a, 15a, 16a and 17a are rotated at different rotational speeds so as to be faster toward the downstream side.

  Each roller housing 61, 62, 63 and 64 is attached to the machine base frame 20. The positions of the back roller housing 61, the third roller housing 62, and the middle roller housing 63 can be adjusted along the travel route R, respectively. Thereby, the distance between the front bottom roller 17a and the middle bottom roller 16a, the distance between the middle bottom roller 16a and the third bottom roller 15a, and the distance between the third bottom roller 15a and the back bottom roller 14a are respectively set. Can be adjusted.

  The top rollers 14b, 15b, 16b and 17b are rotatably supported by the draft cradle 65. The top rollers 14b, 15b, 16b and 17b are driven to rotate by being brought into contact with the bottom rollers 14a, 15a, 16a and 17a with a predetermined pressure.

  A side guide 66 is attached to the side surface of the draft cradle 65. The side guide 66 has a distance between the front top roller 17b and the middle top roller 16b, a distance between the middle top roller 16b and the third top roller 15b, and a distance between the third top roller 15b and the back top roller 14b. Is stipulated. A plurality of types of side guides 66 are prepared, the distance between the front bottom roller 17a and the middle bottom roller 16a, the distance between the middle bottom roller 16a and the third bottom roller 15a, and the third bottom roller 15a and the back bottom. It is exchanged according to the distance to the roller 14a.

  The draft cradle 65 includes a position where the top rollers 14b, 15b, 16b and 17b are in contact with the bottom rollers 14a, 15a, 16a and 17a with a predetermined pressure, and the top rollers 14b, 15b, 16b and 17b are the bottom rollers 14a. , 15a, 16a, and 17a so as to be rotatable about the support shaft 67. The draft cradle 65 rotatably supports the top rollers 14b, 15b, 16b and 17b of the draft device 6 provided in each of a pair of adjacent spinning units 2.

  A guide member 71 is disposed on the upstream side of the pair of back rollers 14 (not shown in FIGS. 1 and 2). The guide member 71 is provided with a through hole 71a through which the sliver S is passed. The guide member 71 guides the sliver S supplied from a can (not shown) on the travel route R.

  A regulating member 72 is disposed between the third roller pair 15 and the middle roller pair 16 (omitted in FIGS. 1 and 2). The restricting member 72 is provided with a through hole 72a through which the sliver S is passed. The restricting member 72 restricts the width of the sliver S to the width of the through hole 72a.

  The third bottom roller 15a is provided with a cleaning device 73 (not shown in FIGS. 1 and 2). The cleaning device 73 includes a main body portion 73a, a contact member 73b, and a magnet 73c. The main body 73a holds a contact member 73b. The contact member 73b has at least one convex portion that contacts the third bottom roller 15a. The main body 73a and the contact member 73b are made of resin, for example. The magnet 73c is accommodated in the main body 73a. The cleaning device 73 sticks to the outer peripheral surface of the third bottom roller 15a by the magnetic force of the magnet 73c acting on the third bottom roller 15a via the contact member 73b, and tries to rotate integrally with the third bottom roller 15a. However, the cleaning device 73 is prevented from rotating by a stopper (not shown). Thereby, the contact member 73b will rub against the outer peripheral surface of the rotating third bottom roller 15a, and the fibers attached to the outer peripheral surface of the third bottom roller 15a are removed. The cleaning device 73 configured as described above is also provided in the back bottom roller 14a.

  A fiber recovery device 80 is disposed on the opposite side of each of the bottom rollers 14a, 15a and 16a from the top rollers 14b, 15b and 16b (not shown in FIGS. 1 and 2). As shown in FIGS. 5 and 6, the fiber recovery device 80 includes a main body portion 81 and a suction port adjustment portion 82. As shown in FIG. 5, the draft device 6 includes the top rollers 14 b, 15 b, and 15 b with the back roller pair 14 positioned on the upper side and the front roller pair 17 positioned on the lower side. The bottom rollers 14a, 15a, 16a, and 17b are disposed so as to be inclined with respect to 16b and 17b.

  The main body 81 is provided with a suction path 83. The suction path 83 extends in parallel to the travel path R. The suction port adjustment unit 82 is provided with a suction port 84 connected to the connection port 83 a of the suction path 83. Only one suction port 84 is provided for the draft device 6 and faces the third bottom roller 15a of the third roller pair 15 that is the third roller pair from the downstream side. Between the suction port 84 and the suction path 83, an inclined surface 85 extending from the suction port 84 to the connection port 83a of the suction path 83 is provided. The inclined surface 85 forms an acute angle with the opening surface 84a of the suction port 84 (the surface formed by the opening region of the suction port 84), and extends from the downstream end 84b of the suction port 84 to the bottom of the connection port 83a (connection port). 83a, the portion facing the opening surface 84a).

  A suction pipe 93 is connected to the connection port 83 b on the opposite side of the suction port 84 in the suction path 83. The suction pipe 93 is connected to a blower (not shown) that generates a suction air flow. As a result, the fiber piece generated in the draft device 6 is sucked from the suction port 84, passes through the suction path 83 and the suction pipe 93, and reaches a fiber discharge device (not shown) provided near the blower.

  Each of the main body portion 81 and the suction port adjustment portion 82 is integrally formed of resin, for example. The suction port adjusting portion 82 is attached to the main body portion 81 by a bolt 86 and can be attached to and detached from the main body portion 81. A plurality of types of suction port adjustment units 82 are prepared and are exchanged according to the type of fiber of the sliver S. Accordingly, the suction port adjustment unit 82 adjusts at least one of the shape and position of the suction port 84 (that is, the shape and / or position of the suction port 84).

  The body portion 81 is provided with a positioning portion 87. The positioning portion 87 has end faces 87 a located on both sides of the suction port adjusting portion 82. The positioning portion 87 positions the main body portion 81 with respect to the third bottom roller 15 a by bringing the end surface 87 a into contact with the positioning plate 91 fixed to the third roller housing 62. The main body 81 is fixed by bolts 88 to a support plate 92 fixed to the back roller housing 61 while being positioned by the positioning portion 87.

  In the following description, the distance between the adjacent roller pairs 17 and 16, the distance between the adjacent roller pairs 16 and 15, and the distance between the adjacent roller pairs 15 and 14 are simply referred to as “distance between the roller pairs”. In the fiber recovery apparatus 80, as shown in FIGS. 5 and 6, when the distance between the rollers is the first distance for drafting the sliver S mainly containing the synthetic fiber, the synthetic fiber is used. The suction port adjustment portion 82 (for the sliver S mainly containing synthetic fiber) is attached to the main body portion 81, and at least one of the shape and position of the suction port 84 is set to the first state for the synthetic fiber. As shown in FIGS. 7 and 8, when the distance between the rollers is the second distance for drafting the sliver S mainly containing cotton fibers, the distance between the rollers (for sliver mainly containing cotton fibers) is used. S) suction port adjustment portion 82 is attached to main body portion 81, and at least one of the shape and position of suction port 84 is set to the second state for cotton fibers. The “sliver S mainly containing cotton fibers” is a sliver S in which the mixing ratio of 100% cotton is 50% or more. The “sliver S mainly containing synthetic fiber” is a sliver S in which the mixing ratio of 100% cotton is less than 50%, and the average fiber length of the synthetic fiber is 32 mm or more and 51 mm or less. The inclined surface 85 is formed by the suction port adjusting portion 82 in the first state, and is formed by the main body portion 81 in the second state.

  When drafting the sliver S mainly containing synthetic fiber (when shown in FIGS. 5 and 6), when drafting the sliver S mainly containing cotton fibers (when shown in FIGS. 7 and 8) In contrast, the second distance is shorter than the first distance. This is because cotton fibers contain more short fibers than synthetic fibers. As for the suction port 84, the downstream end 84b is located on the downstream side in the second state than in the first state. This is because when the sliver S mainly containing cotton fibers is drafted, the middle bottom of the middle roller pair 16 that is the second roller pair from the downstream side is compared with the case of drafting the sliver S mainly containing synthetic fibers. This is because fiber pieces are easily generated even in the vicinity of the roller 16a.

  As described above, the fiber recovery device 80 includes the main body portion 81 provided with the suction path 83 and the suction port adjustment section that adjusts at least one of the shape and position of the suction port 84 connected to the suction path 83. 82. Thereby, in the fiber collection | recovery apparatus 80, at least 1 of the shape and position of the suction opening 84 can be adjusted appropriately according to the kind of fiber. Therefore, according to the fiber collection | recovery apparatus 80, even if the kind of fiber changes, it becomes possible to collect | recover a fiber piece efficiently.

  In the fiber recovery device 80, a suction port adjustment unit 82 provided with a suction port 84 is detachable from the main body unit 81. Accordingly, at least one of the shape and position of the suction port 84 can be adjusted with a simple configuration. Furthermore, in order to simplify the configuration, for example, a fiber fragment is provided as compared with a fiber recovery device in which a suction port is provided in the main body, and another member such as a slide member or a rotation member functions as a suction port adjustment unit. Is difficult to deposit.

  The fiber recovery device 80 further includes a positioning portion 87 for positioning the main body 81 on the third bottom roller 15a of the third roller pair 15 that is the third roller pair from the downstream side. Thereby, even when at least one of the shape and position of the suction port 84 is adjusted, the suction port 84 can be positioned in the vicinity of the third bottom roller 15a in which fiber fragments are likely to be generated due to fiber winding or the like.

  In the fiber recovery device 80, an inclined surface 85 extending from the suction port 84 to the connection port 83 a of the suction channel 83 is provided between the suction port 84 and the suction channel 83. Thereby, the fiber piece can be smoothly moved from the suction port 84 to the suction path 83 via the inclined surface 85. Therefore, it becomes possible to collect the fiber pieces more efficiently.

  Since the fiber recovery device 80 can be attached to and detached from the draft device 6 by attaching and detaching the bolts 88, maintenance can be easily performed.

  In the draft device 6, when the distance between the rollers is the first distance for drafting the sliver S mainly containing the synthetic fiber, at least one of the shape and the position of the suction port 84 is for the synthetic fiber. In the first state, when the distance between the rollers is the second distance for drafting the sliver S mainly containing cotton fibers, at least one of the shape and position of the suction port 84 is the first for the cotton fibers. Two states are set. The end 84b of the downstream suction port 84 is positioned on the downstream side in the second state rather than in the first state.

  In the vicinity of the third bottom roller 15a, a fiber piece is likely to be generated due to the winding of the fiber or the like. As a countermeasure, in the draft device 6, only one suction port 84 of the fiber recovery device 80 faces the third bottom roller 15a. Further, when the sliver S mainly containing cotton fibers is drafted, fiber pieces are easily generated even in the vicinity of the middle bottom roller 16a. As a countermeasure, in the draft device 6, when the sliver S mainly containing cotton fibers is drafted, the end portion 84 b of the suction port 84 is arranged on the downstream side than when the sliver S mainly containing synthetic fibers is drafted. (Ie, the end portion 84b of the suction port 84 is positioned in the vicinity of the middle bottom roller 16a). Therefore, in the draft device 6, even if the fiber type changes, the fiber pieces can be efficiently collected.

  In addition, the position adjustment to the downstream side of the end 84b of the suction port 84 is not only when drafting the sliver S made of 100% cotton, but, for example, a blended raw material of card cotton and a synthetic fiber raw material with a high proportion of short fibers It is also effective when drafting a sliver S consisting of In other words, the position adjustment to the downstream side of the end portion 84b of the suction port 84 is effective when drafting the sliver S made of a raw material on which fiber pieces are likely to be deposited below the middle bottom roller 16a. Further, even if at least one of the shape and position of the suction port 84 is adjusted according to the environment and / or conditions, the recovery efficiency of the fiber pieces can be improved. An example of the environment is the temperature and / or humidity in the room where the spinning machine 1 is operating. The ease with which the fibers are wound around the bottom rollers 14a, 15a, 16a and 17a varies depending on the temperature and / or humidity in the room where the spinning machine 1 is operating. For example, when the humidity is high, fibers tend to adhere to the apron belt 18a. An example of the condition is a draft rate (degree of pulling the fiber). When the draft rate is high, the fibers are easily wound around the bottom rollers 14a, 15a, 16a, and 17a.

  In the draft device 6, a cleaning device 73 is provided for each of the third bottom roller 15a and the back bottom roller 14a. Thereby, a fiber can be removed from each of the third bottom roller 15a and the back bottom roller 14a which a fiber tends to roll up. As described above, the draft device 6 is configured so that each of the top rollers 14b, 15b, 16b, and 17b has the back roller pair 14 positioned on the upper side and the front roller pair 17 positioned on the lower side. The bottom rollers 14a, 15a, 16a, and 17b are disposed so as to be inclined in the direction in which they are positioned on the lower side. Therefore, the fibers removed by each cleaning device 73 fall as a fiber piece by gravity, are received by the inclined surface 85, and are sucked from the suction port 84.

  Since only one suction port 84 is provided in the draft device 6, for example, the entire spinning machine 1 can be compared with a case where a plurality of suction ports are provided for each of the bottom rollers 14a, 15a, 16a and 17a. The consumption flow rate can be suppressed.

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

  As shown in FIG. 5, the fiber recovery device 80 may further include a flow rate adjusting unit 89 that adjusts the flow rate of the suction air from the suction port 84. An example of the flow rate adjusting unit 89 is an orifice. By providing the flow rate adjusting unit 89 in the suction path 83 or the suction pipe 93, the fiber pieces can be collected at an appropriate suction air flow rate according to the type of fiber.

  The fiber recovery device 80 may be applied to an attachment target (an apparatus that generates fiber pieces) other than the draft device 6. In that case, the positioning part 87 positions the main body part 81 with respect to the mounting target. According to this, even when at least one of the shape and position of the suction port 84 is adjusted, the suction port 84 can be aligned with a desired position in the mounting target.

  The suction port adjusting portion 82 may be attached to the main body portion 81 by, for example, fitting, without depending on the bolt 86. According to this, the number of parts can be reduced.

  The suction port 84 may be provided in the main body 81 instead of the suction port adjustment unit 82. In that case, another member such as a slide member or a rotation member functions as a suction port adjustment unit.

  The cleaning device 73 may include a scraper member made of resin and an urging member that presses the scraper member against the bottom roller.

  In order to prevent the twist of the fiber bundle F from being transmitted to the upstream side of the air spinning device 7, the pneumatic spinning device 7 further includes a needle that is held by the fiber guide and arranged to protrude into the spinning chamber. May be. The pneumatic spinning device 7 may prevent the twist of the fiber bundle F from being transmitted to the upstream side of the pneumatic spinning device 7 by the downstream end portion of the fiber guide portion instead of such a needle. Good. Further, the pneumatic spinning device 7 may include a pair of air jet nozzles that twist the fiber bundle F in opposite directions instead of the above configuration.

  In the spinning unit 2, the yarn storage device 11 has a function of drawing 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 spinning machine 1, each device is arranged so that the yarn Y supplied on the upper side is wound on the lower side in the height direction of the machine base. However, each device may be arranged such that the yarn Y supplied on the lower side is wound up on the upper side.

  In the spinning machine 1, at least one of the bottom rollers of the draft device 6 and the traverse guide 23 are driven by power from the second end frame 5 (that is, common to the plurality of spinning units 2). However, each part of the spinning unit 2 (for example, the drafting device 6, the air spinning device 7, the winding device 13, etc.) may be driven independently for each spinning unit 2.

  In the traveling direction of the yarn Y, the tension sensor 9 may be arranged on the upstream side of the yarn monitoring device 8. 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.

  In FIG. 1, the spinning machine 1 is illustrated so as to wind up the cheese-shaped package P, but it is also possible to wind up the cone-shaped package P. In the case of the cone-shaped package P, the yarn Y is slackened by the traverse of the yarn Y, but the slack can be absorbed by the yarn storage device 11.

  DESCRIPTION OF SYMBOLS 1 ... Spinning machine, 6 ... Draft device, 7 ... Pneumatic spinning device, 13 ... Winding device, 14 ... Back roller pair, 14a ... Back bottom roller, 14b ... Back top roller, 15 ... Third roller pair, 15a ... Third bottom Roller, 15b ... Third top roller, 16 ... Middle roller pair, 16a ... Middle bottom roller, 16b ... Middle top roller, 17 ... Front roller pair, 17a ... Front bottom roller, 17b ... Front top roller, 73 ... Cleaning device, 80 DESCRIPTION OF SYMBOLS Fiber recovery apparatus 81 ... Main body part 82 ... Suction port adjustment part 83 ... Suction path 83a ... Connection port 84 ... Suction port 84b ... End part 85 ... Inclined surface 87 ... Positioning part 89 ... Flow rate Adjustment part, S ... Sliver (fiber bundle), F ... Fiber bundle, Y ... Yarn, P ... Package.

Claims (10)

A main body provided with a suction path;
A fiber recovery apparatus comprising: a suction port adjustment unit that adjusts at least one of the shape and position of the suction port connected to the suction path. The suction port is provided in the suction port adjustment unit,
The fiber recovery device according to claim 1, wherein the suction port adjustment section is detachable from the main body section.   The fiber collection device according to claim 1, further comprising a positioning portion for positioning the main body portion with respect to a mounting target.   The fiber recovery device according to any one of claims 1 to 3, wherein an inclined surface extending from the suction port to a connection port of the suction path is provided between the suction port and the suction path.   The fiber collection device according to any one of claims 1 to 4, further comprising a flow rate adjusting unit that adjusts a flow rate of suction air from the suction port. At least three roller pairs each having a bottom roller and a top roller pair for drafting fiber bundles;
A fiber recovery device provided with only one suction port facing the bottom roller of the third pair of rollers from the downstream side in the draft direction,
When the distance between the adjacent roller pairs is a first distance for drafting the fiber bundle mainly containing synthetic fiber, at least one of the shape and position of the suction port is set to the first state. ,
When the distance between the adjacent roller pairs is a second distance for drafting the fiber bundle mainly containing cotton fibers, at least one of the shape and position of the suction port is in the second state,
An end of the suction port on the downstream side in the draft direction is located on the downstream side in the draft direction in the second state than in the first state. The fiber recovery device is
A main body provided with a suction path;
The draft device according to claim 6, further comprising: a suction port adjustment unit that adjusts at least one of a shape and a position of the suction port connected to the suction path.   The draft device according to claim 7, further comprising a positioning part for positioning the main body part with respect to the bottom roller of the third pair of rollers from the downstream side in the draft direction.   The draft device according to any one of claims 6 to 8, further comprising a cleaning device provided for at least one of the bottom rollers of the third or more pairs of rollers from the downstream side in the draft direction. The draft device according to any one of claims 6 to 9,
An air spinning device for producing a yarn by twisting the fiber bundle drafted by the draft device;
A spinning machine comprising: a winding device that winds the yarn generated by the pneumatic spinning device into a package.

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