JP2017089059A - Tensor bar, draft machine and spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tensor bar, a draft machine and a spinning machine, which can improve thread quality.SOLUTION: A tensor bar 40 comprises: a body part 50, which extends in rotation axial direction of a bottom roller 16a; and a support member 54b, which is disposed on the body part 50 and sets a first nip position of a fiber bundle S by a top belt 18b and a bottom belt 16a installed on a top roller 16b by supporting the bottom belt 18a. The support member 54b is disposed at a position where the first nip position is located in a range of 11 mm or more and 22 mm or less from the second nip position of the fiber bundle S nipped between the bottom roller 16a and the top roller 16b.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a ten server, a draft device, and a spinning machine.

  A spinning machine including a draft device that drafts a fiber bundle and a spinning device that manufactures spun yarn by twisting the drafted fiber bundle is known. In the draft device, a plurality of roller pairs are arranged in the draft direction of the fiber bundle. An apron belt for gripping (niping) the fiber bundle and drafting the fiber bundle is spanned between the ten server and the bottom roller of one roller pair.

  Patent Document 1 describes a draft device including a ten server (belt bridge) in which five rotatable rollers are arranged. According to the ten server of Patent Document 1, it becomes possible to reduce the friction between the ten server and the apron belt when the apron belt rotates.

German Patent Application Publication No. 102005000990

  In such a draft device, the gripping position (nip position) and the gripping force of the fiber bundle by the apron belt affect the yarn quality. Here, the effective length of the fiber bundle varies depending on the type. Therefore, for example, when the effective fiber length is short, if the grip position of the fiber bundle is not properly set, the fiber is pulled by the fiber that travels ahead or travels while bending with respect to the draft direction. Therefore, it may be difficult to control the movement of the fiber. Thereby, unevenness etc. arise in the thickness of a fiber bundle, and there exists a possibility that yarn quality may fall.

  An object of the present invention is to provide a ten server, a draft device, and a spinning machine that can improve yarn quality.

  The tenserver according to the present invention is a tenser that drafts a fiber bundle by a pair of rollers composed of a bottom roller and a top roller, wherein the bottom belt is stretched between the bottom roller and the tension of the bottom belt is adjusted. The first bundle of fiber bundles formed by the top belt and the bottom belt provided on the top roller by supporting the bottom belt disposed on the main body and the main body extending in the rotation axis direction of the bottom roller. A support member for setting the nip position, and the support member is located at a position where the distance between the first nip position and the second nip position of the fiber bundle by the bottom roller and the top roller is in the range of 11 mm to 22 mm. Is arranged.

  In this ten server, the support member is disposed at a position where the distance between the first nip position and the second nip position is in the range of 11 mm to 22 mm. Thus, even when fiber bundles having different effective fiber lengths are drafted, by setting the first nip position and the second nip position within the above range, for example, even for short fibers, the fiber bundle can be appropriately selected. Therefore, the movement of the fiber can be suppressed. Therefore, it is possible to suppress the occurrence of unevenness in the thickness of the fiber bundle. As a result, the yarn quality can be improved. In particular, since the distance between the first nip position and the second nip position is smaller than the average fiber length of cotton (25 mm or more), it is effective in suppressing the movement of the cotton fibers.

  In one embodiment, the support member may be provided so that the distance between the first nip position and the second nip position is in a range of 11 mm or more and 22 mm or less. Accordingly, the support member can be adjusted (changed) in a range where the distance between the first nip position and the second nip position is 11 mm or more and 22 mm or less. Therefore, since the first nip position can be changed according to the type of fiber bundle, the movement of the fiber can be effectively controlled.

  In one embodiment, the support member may be a roller that is rotatable about a rotation axis that extends in the same direction as the extending direction of the main body. According to the ten server having this configuration, it is possible to reduce friction between the ten server and the apron belt when the apron belt rotates.

  In one embodiment, a positioning part for detachably positioning the support member is provided with an exchange member arranged in one direction, and the main body part is exchanged so that the positioning part is arranged along the draft direction of the fiber bundle. The member may be detachably fixed. In this configuration, the first nip position can be changed by changing the positioning portion to which the support member is attached. Further, for example, the position of the support member in the arrangement direction can be easily changed by exchanging with an exchange member in which the positions of the positioning portions in the arrangement direction are different from each other. That is, the first nip position can be easily adjusted.

  A draft device according to the present invention includes a roller pair including a bottom roller and a top roller, the ten server, and an apron belt that spans the bottom roller and the ten server.

  In this draft device, even fiber bundles having different effective fiber lengths can be drafted by controlling the movement of the fibers. Therefore, it is possible to suppress the occurrence of unevenness in the thickness of the fiber bundle, so that the yarn quality can be improved.

  A spinning machine according to the present invention includes the above draft device, an air spinning device that twists the fiber bundle drafted by the draft device to generate a yarn, and a winding that winds the yarn generated by the air spinning device into a package. A take-off device.

  In this spinning machine, even a fiber bundle having different effective fiber lengths can be drafted by controlling the movement of the fibers in the draft device. Accordingly, since the pneumatic spinning device generates a yarn by a fiber bundle in which unevenness or the like does not occur in the thickness, it is possible to generate a high quality yarn.

  According to the present invention, the yarn quality can be improved.

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 plan view of the drafting device of the spinning unit shown in FIG. 2. FIG. 3 is a side view of the drafting device of the spinning unit shown in FIG. 2. It is a perspective view which shows a middle roller pair. It is sectional drawing of a middle roller pair. It is a perspective view which shows a ten server. It is a perspective view which shows the ten server which abbreviate | omitted illustration of the roller. It is a disassembled perspective view of a main body and a support body shown in FIG. It is a disassembled perspective view which shows the support body from which the position of a bearing differs. It is a perspective view which shows the ten server where the roller is arrange | positioned at the support body of FIG. It is a perspective view which shows the ten server which concerns on other embodiment. It is sectional drawing along the aa line in FIG. It is a perspective view which shows the ten server which concerns on other embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be 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 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 related to the setting contents and / or status 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 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 (bottom belt) 18 a is provided for the bottom roller of the middle roller pair 16. An apron belt (top belt) 18b 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 airflow generation nozzle is disposed around the path along which the fiber bundle F travels. When air is injected from the swirling air flow generating nozzle, a swirling air flow is generated 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 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.

  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 across 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 face each other across the travel route R. 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 feed the sliver S supplied from a can (not shown) and guided by the fiber bundle guide 77 from the upstream side to the downstream side.

  The back bottom roller 14 a is rotatably supported by the back roller housing 66. The third bottom roller 15 a is rotatably supported by the third roller housing 67. The middle bottom roller 16a is rotatably supported by the middle roller housing 68. The front bottom roller 17a is rotatably supported by the front roller housing 69. The bottom rollers 14a, 15a, 16a, and 17a are rotated at different rotational speeds by the power from the second end frame 5 so as to become faster toward the downstream side. In addition, at least a part or all of each bottom roller 14a, 15a, 16a, 17a may be rotated by a drive motor provided in each spinning unit 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 the draft cradle 71. 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 at a predetermined pressure.

  In the draft cradle 71, each top roller 14b, 15b, 16b, 17b is in contact with each bottom roller 14a, 15a, 16a, 17a at a predetermined pressure, and each top roller 14b, 15b, 16b, 17b is each bottom roller 14a. , 15a, 16a, and 17a can be pivoted about the support shaft 72. The rotation of the draft cradle 71 is performed using a handle (not shown) provided on the draft cradle 71. The draft cradle 71 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. That is, the draft cradle 71 is shared by the draft device 6 included in each of the pair of adjacent spinning units 2.

  Between the third roller pair 15 and the middle roller pair 16, for example, a restricting portion 74 called a sliver guide or a capacitor is disposed. The restricting portion 74 is formed with a through hole 74a through which the sliver S is passed. The width of the sliver S in the direction in which the rotation axis of each roller 14a, 14b, 15a, 15b, 16a, 16b, 17a, 17b extends (hereinafter referred to as “rotation axis direction”) is the width of the through hole 74a in the rotation axis direction. Regulated by width. In this way, the restricting portion 74 restricts the route along which the sliver S travels on the travel route R, and restricts the width of the sliver S in the rotation axis direction to the width of the through hole 74a in the rotation axis direction. The restricting portion 74 is supported by the support portion 75. The support portion 75 is positioned below the travel path R in the machine height direction, and is attached to a middle roller housing 68 that rotatably supports the middle bottom roller 16a. Thereby, the position of the restricting portion 74 with respect to the middle roller pair 16 is maintained. In FIGS. 1 and 2, the restriction portion 74 and the support portion 75 are omitted.

  As shown in FIGS. 5 and 6, the apron belt 18 a is stretched between the middle bottom roller 16 a and the ten server 40. The apron belt 18a is driven by the rotation of the middle bottom roller 16a. The apron belt 18b is stretched over the middle top roller 16b and the apron tensioner 42. The apron tensioner 42 is supported by the draft cradle 71. The apron belt 18b is driven by the rotation of the top roller 16b driven by the rotation of the middle bottom roller 16a.

  In the middle roller pair 16, the apron belt 18a is pressed by the ten server 40, and the apron belt 18b is pressed by the apron tensioner 42, whereby pressure is applied to the sliver S by the apron belt 18a and the apron belt 18b, and the nip (nip) is performed. To do.

  Next, the ten server 40 will be described in detail. As shown in any of FIGS. 5 to 9, the ten server 40 includes a main body 50, a support body (exchange member) 52, and rollers (support members) 54 a, 54 b, 54 c, 54 d. Yes.

  The main body 50 is a member that extends in one direction and has a predetermined thickness. The main body 50 is made of a material such as metal, for example. As shown in FIG. 4, the main body 50 is disposed on the downstream side (front bottom roller 17 a side) of the middle bottom roller 16 a in the travel route R of the sliver S. As shown in FIG. 3, the main body 50 is disposed so as to extend in the same direction as the extending direction of the bottom roller 16 a (the arrangement direction of the spinning units 2). In other words, the main body 50 is disposed so as to extend in the same direction as the direction in which the rotation shaft of the bottom roller 16a extends. For example, the main body 50 is provided in common to the draft devices 6 of two adjacent spinning units 2. One main body 50 may be provided for each spinning unit 2. The main body 50 is supported by a support mechanism (not shown). As shown in FIG. 9, the main body 50 has a recess 51. For example, the recess 51 is formed by partially cutting the main body 50 in the thickness direction.

  The support body 52 rotatably supports the rollers 54a to 54d (see FIG. 4). The support body 52 is formed of a material such as resin, for example. As shown in FIG. 9, the support body 52 is detachably provided on the main body 50. The support body 52 is disposed and held in the recess 51 of the main body 50. The support 52 is fixed to the main body 50 by a fixing tool (not shown) such as a screw.

  The support body 52 has a main body portion 52a, a first end portion 52b, and a second end portion 52c. The main body 52a, the first end 52b, and the second end 52c are integrally formed, for example. The main body 52a is a plate-like member having a substantially rectangular shape.

  Each of the first end portion 52b and the second end portion 52c is disposed at an end portion in the longitudinal direction of the main body portion 52a and is provided along the width direction of the main body portion 52a. Each of the first end portion 52b and the second end portion 52c protrudes from the surface of the main body portion 52a. That is, the thickness of the 1st end part 52b and the 2nd end part 52c is larger than the thickness of the main-body part 52a. Thereby, the support body 52 is exhibiting substantially concave shape seeing from the direction along the surface of the main-body part 52a.

  The first end portion 52b is provided with bearings (positioning portions) 56a, 56b, 56c, and 56d. The bearings 56a to 56d are arranged in this order from one end to the other end in the longitudinal direction of the first end 52b (the width direction of the main body 52a) at the first end 52b. The second end portion 52c is provided with bearings (positioning portions) 58a, 58b, 58c, and 58d. The bearings 58a to 58d are arranged in this order from one end to the other end in the longitudinal direction of the second end 52c at the second end 52c. The bearing 56a and the bearing 58a are disposed at positions facing each other with the main body portion 52a interposed therebetween. Similarly, the bearing 56b and the bearing 58b, the bearing 56c and the bearing 58c, and the bearing 56d and the bearing 58d are arranged at positions facing each other with the main body portion 52a interposed therebetween.

  The bearings 56b and 56c and the bearings 58b and 58c are grooves formed in the first end portion 52b and the second end portion 52c, respectively. The bearings 56a and 56d and the bearings 58a and 58d are notches formed in the first end 52b and the second end 52c, respectively. The contact surfaces of the respective bearings 56a to 56d and the rollers 54a to 54d in the respective bearings 58a to 58d have shapes (curved shapes in the present embodiment) along the outer shapes of the rollers 54a to 54d. In addition, the shape of each bearing 58a-58d may be formed in U shape or V shape, when it sees from an axial direction.

  Each bearing 56a-56d and each bearing 58a-58d support roller 54a-54d so that attachment or detachment is possible. Specifically, the bearing 56a and the bearing 58a are provided with a roller 54a and rotatably support the roller 54a. The bearing 56b and the bearing 58b are provided with a roller 54b and rotatably support the roller 54b. The bearing 56c and the bearing 58c are provided with a roller 54c and rotatably support the roller 54c. The bearing 56d and the bearing 58d are provided with a roller 54d and rotatably support the roller 54d.

  The rollers 54a to 54d are rotatably supported by the support body 52. The rollers 54a to 54d have a cylindrical shape. In the present embodiment, the cross sections of the rollers 54a to 54d have a perfect circle shape as shown in FIG. The rollers 54a to 54d are made of, for example, a material having wear resistance. The rollers 54a to 54d may have a form in which a material having wear resistance is applied to the surfaces thereof. Further, the surfaces of the rollers 54a to 54d may be in a state where there is almost no unevenness or the like (smooth state), or may be subjected to mirror surface processing, satin processing, embossing processing, groove processing, or the like. .

  The diameter of the rollers 54a to 54d may be set as appropriate depending on the design, for example, between 3 mm and 7 mm. In this embodiment, the diameter of the roller 54b and the roller 54c is 3 mm. The diameter of the roller 54a and the roller 54d is 4 mm. The lengths of the rollers 54a to 54d in the axial direction (hereinafter simply referred to as “length”) may be appropriately set according to the width of the apron belt 18a within a range in which rigidity can be ensured. Specifically, the length of the rollers 54a to 54d may be equal to or greater than the width of the apron belt 18a. That is, the length of the rollers 54a to 54d may be equal to the width of the apron belt 18a or may be larger than the width of the apron belt 18a. FIG. 5 shows an example in which the lengths of the rollers 54a to 54d are larger than the width of the apron belt 18a. In addition, each roller 54a-54d and / or the support body 52 may be provided with an identifiable mark. Examples of the mark include engraving, color coding, and a seal.

  As shown in FIGS. 7 and 8, the end of the roller 54a is supported by a bearing 56a and a bearing 58a. The end of the roller 54b is supported by the bearing 56b and the bearing 58b. The end of the roller 54c is supported by the bearing 56c and the bearing 58c. The end of the roller 54d is supported by the bearing 56d and the bearing 58d. With such a configuration, in this embodiment, the rollers 54a to 54d are arranged in this order from the upstream side in the draft direction toward the downstream side. Both end portions of each of the rollers 54 a to 54 d are in contact with the side surface of the concave portion 51 of the main body portion 50. Thereby, the rollers 54a to 54d are restricted from moving in the axial direction.

  The intervals between the rollers 54a to 54d in the width direction of the main body 52a may be arranged at equal intervals or may be arranged at unequal intervals. In the present embodiment, the rollers 54a to 54d are arranged with a gap (gap) between each other along the width direction of the main body 52a, but in a state where there is almost no gap (there is no gap). It may be arranged.

  The apron belt 18a is stretched over the bottom roller 16a and the ten server 40. Specifically, the apron belt 18a is stretched over the bottom roller 16a and the roller 54d of the ten server 40. The apron belt 18a rotates following the bottom roller 16a rotated by a driving unit (not shown). The upper portions of the rollers 54a to 54d are pressed downward by the apron belt 18a. Thereby, the position of each roller 54a-54d in the up-down direction is regulated. Each of the rollers 54a to 54d rotates following the rotation of the apron belt 18a.

  As described above, since the rollers 54a to 54d are detachably supported by the bearings 56a to 56d and the bearings 58a to 58d, for example, the support body 52 in a state where the roller 54c is removed from the bearings 56c and 58c. The main body 50 may be attached. The bearings 56a to 56d and the rollers 54a to 54d removed from the bearings 58a to 58d are not limited to the rollers 54c. This makes it possible to adjust the nip position P2 (see FIG. 6) in the width direction of the main body 52a (the arrangement direction of the rollers 54a to 54d). In this embodiment, at least the roller 54b and the roller 54d may be attached. The intervals between the rollers 54a to 54d are set as appropriate according to the type of the sliver S.

  The method for adjusting the nip position P2 in the width direction of the main body 50 is not limited to the above method. For example, the support body 52 fixed to the main body 50 may be replaced with a support body 152 as shown in FIG. The support body 152 is different from the support body 52 in the positions of the bearings 56 a to 56 d and the bearings 58 a to 58 d in the width direction of the main body 50. As shown in FIG. 11, by fixing the rollers 54 a to 54 d held on such a support 152 to the main body 50, the nip position P <b> 2 in the width direction of the main body 50 can be adjusted. In addition, each roller 54a-54d and / or the support body 152 may be provided with an identifiable mark. Examples of the mark include engraving, color coding, and a seal.

  Further, the positions of the bearings 56a to 56d and the bearings 58a to 58d in the width direction of the main body 50 are not only different from the support 52, but also the bearings 56a to 56d and the bearings 58a to 58d have different shapes. The body 152 may be exchanged. In this case, not only the nip position in the width direction of the main body 50 is adjusted, but also the rollers (support members) having different protrusion amounts from the supports 52 and 152 are exchanged, or the contact areas with the apron belt 18a are mutually different. It can be replaced with a different roller (support member). Thereby, the nip force of the sliver S by the apron belt 18a can be easily adjusted.

  As shown in FIG. 6, the roller 54b includes a nip position (second nip position) P1 of the sliver S by the middle bottom roller 16a and the middle top roller 16b, and a sliver by the apron belt 18a and the apron belt 18b by the roller 54b. The distance D1 between the S nip position (first nip position) P2 and the S nip position P1 is in a range of 11 mm to 22 mm. That is, the bearing 56b and the bearing 58b are arranged at positions that support the roller 54b in a range where the distance D1 between the nip position P1 and the nip position P2 is 11 mm or more and 22 mm or less. In the present embodiment, the distance D1 is set to 16 mm to 17 mm, for example.

  The roller 54d is disposed at a position where the distance D2 between the nip position P1 and the end of the roller 54d on the front bottom roller 17a side is, for example, 35 mm. The linear distance between the nip position P1 and the nip position of the sliver S by the front bottom roller 17a and the front top roller 17b is, for example, 47 mm.

  As shown in FIG. 6, the height position of the contact point between the roller 54b and the apron belt 18a is higher than the height position of the contact point between the other rollers 54a, 54c, 54d and the apron belt 18a. That is, the roller 54b protrudes above the rollers 54a, 54c, and 54d. The contact point between the roller 54b and the apron belt 18a is located above a straight line connecting the contact point between the roller 54a and the apron belt 18a and the contact point between the roller 54d and the apron belt 18a. The contact point between the roller 54a and the apron belt 18a and the contact point between the roller 54d and the apron belt 18a may be at the same height position or at different height positions. The contact point between the roller 54c and the apron belt 18a is above a straight line connecting the contact point between the roller 54a and the apron belt 18a and the contact point between the roller 54d and the apron belt 18a, and below the contact point between the roller 54b and the apron belt 18a. Is located.

  As described above, in the ten server 40 according to the present embodiment, the roller 54b includes the nip position P1 of the sliver S by the middle bottom roller 16a and the middle top roller 16b, the apron belt 18a and the apron belt 18b by the roller 54b. The distance D1 between the sliver S and the nip position P2 of the sliver S is disposed at a position in the range of 11 mm to 22 mm. Thereby, even if it is a case where the sliver S from which effective fiber length differs is drafted, the movement of the fiber of the sliver S can be suppressed by making the nip position P1 and the nip position P2 into the said range. Specifically, for example, even if the sliver S has an effective fiber length of 25 mm or less, the movement of the fiber can be suppressed. Therefore, the occurrence of unevenness in the thickness of the sliver S can be suppressed. As a result, the yarn quality can be improved. In particular, since the distance D1 is smaller than the average fiber length (25 mm or more) of cotton, it is effective for suppressing the movement of cotton fibers.

  In the present embodiment, the support members that support the apron belt 18 a are rollers 54 a to 54 d that are rotatable about a rotation axis that extends in the same direction as the extension direction of the main body 50. According to the ten server 40 having this configuration, it is possible to reduce friction between the ten server 40 and the apron belt 18a when the apron belt 18a rotates.

  In the present embodiment, the ten server 40 includes bearings 56a to 56d for detachably positioning the rollers 54a to 54d and a support body 52 in which the bearings 58a to 58d are arranged in one direction. The main body 50 detachably fixes the support 52 so that the bearings 56a to 56d and the bearings 58a to 58d are arranged along the draft direction of the sliver S. In this configuration, the nip position P2 can be changed by changing the bearings 56a to 56d to which the rollers 54a to 54d are attached and the bearings 58a to 58d. In addition, for example, the positions of the rollers 54a to 54d in the arrangement direction can be easily changed by exchanging the support bodies 52 with different positions of the bearings 56a to 56d and the bearings 58a to 58d in the arrangement direction. That is, the nip position P2 can be easily adjusted.

  In the ten server 40 of the above embodiment, the support members 52 and 152 and / or the rollers 54a to 54d are appropriately replaced by the operator according to the yarn type. The support bodies 52 and 152 and / or the rollers 54a to 54d are provided with distinguishable marks. Accordingly, the operator can easily replace the support and / or the roller suitable for the yarn type by looking at the instruction manual (table), for example. Therefore, according to the kind of sliver S, each roller 54a-54d can be arrange | positioned to the support bodies 52 and 152 easily and correctly.

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

  In the embodiment described above, an example in which the support member is a roller has been described. However, the support member is not limited to a roller. In short, the support member may be any member as long as it is configured to support the apron belt 18a so that the nip position is set between the apron belt 18a and the apron belt 18b.

  In the above-described embodiment, an example in which the roller 54b is disposed at a position where the distance D1 between the nip position P1 and the nip position P2 is in the range of 11 mm to 22 mm is described. However, one of the rollers 54a to 54d may be disposed at a position where the distance D1 between the nip position P1 and the nip position P2 is in the range of 11 mm to 22 mm.

  In the above-described embodiment, the form in which the plurality of rollers 54a to 54d are provided on the support bodies 52 and 152 has been described as an example. However, it is sufficient that at least one roller is provided. In short, it is only necessary that the roller (support member) is disposed at a position where the distance D1 between the nip position P1 and the nip position P2 is in the range of 11 mm to 22 mm.

  In the above-described embodiment, the configuration in which the rollers 54a to 54d are detachably provided on the support bodies 52 and 152 has been described as an example. However, the support member that supports the apron belt 18 a may be fixed to the main body 50. That is, the support may not be provided.

  In the above embodiment, the nip position in the width direction of the main body 50 can be easily adjusted by adjusting whether or not the rollers 54a to 54d are attached to the bearings 56a to 56d and the bearings 58a to 58d of the support bodies 52 and 152. Although the example which makes it possible to adjust has been described, the present invention is not limited to this. For example, as shown in FIGS. 12 and 13, the diameters of the shaft portions 59aa to 59da and the diameter of the roller portion that supports the apron belt 18a are different from each other (larger than the bearings 53a to 53d of the support 153). The stepped rollers 59a to 59d may be detachably and rotatably arranged. Thereby, even if the diameters of the shaft portions 59aa to 59da are the same as each other, by replacing the roller portions with stepped rollers having different diameters, the rollers having different projection amounts from the support 153 can be held, It is possible to hold rollers having different contact areas with the apron belt 18a. Thereby, the nip force of the sliver S by the apron belt 18a can be easily adjusted.

  In the said embodiment or the said modification, although the roller 54a-54d was given and demonstrated with respect to each bearing 56a-56d and each bearing 58a-58d of the support bodies 52 and 152, it did not rotate. Alternatively, the rollers 54a to 54d may be held.

  In the above-described embodiment or the above-described modified example, as an example of the support member that supports the apron belt 18a, the roller that can rotate around the rotation shaft has been described as an example. However, the present invention is not limited thereto, for example, FIG. As shown in FIG. 14, only the portion that contacts the apron belt 18 a may be a support member 154 formed in an arc shape. A groove 154a may be formed in a portion that contacts the apron belt 18a. In this case, it is possible to reduce friction between the tenserver 40 and the apron belt 18a when the apron belt 18a rotates.

  In the embodiment described above, an example in which the rollers 54a to 54d have a perfect circular cross section has been described. However, the cross section of the roller may have an elliptical shape.

  In the above embodiment, an example has been described in which the rollers 54a to 54d are inserted into the bearings 56a to 56d and the bearings 58a to 58d from above to fix the rollers 54a to 54d to the support bodies 52 and 152. However, the present invention is not limited to this. For example, the roller may be fixed to the support by forming the bearing as a circular hole and inserting the rollers 54a to 54d while sliding the rollers 54a to 54d in the axial direction.

  In the above embodiment, the rollers 54a to 54d as the support members are detachably provided on the support body 52, and the rollers 54a to 54d having different diameters are disposed on the support body 52, so that the amount of protrusion from the support body 53 is increased. The mode of adjusting the above has been described as an example. However, the support member may be adjusted by the drive unit. Specifically, a drive for moving the support member in the vertical direction may be provided, and the protrusion of the support member from the support may be adjusted by moving the support member in the vertical direction by the operation of the drive unit. Moreover, the drive part which moves a support member along a draft direction in a support body may be provided, and the form which adjusts the position in the draft direction of a support member by the action | operation of a drive part may be sufficient.

  In the embodiment described above, an example in which the contact point between the roller 54b and the apron belt 18a is higher than the contact point between the other rollers 54a, 54c, 54d and the apron belt 18a has been described as an example. However, the height positions of the contacts between the rollers 54a to 54d and the apron belt 18a may be the same in the draft direction.

  The spinning machine may be other than the spinning machine 1 having the air spinning device 7, for example, a ring spinning machine.

  DESCRIPTION OF SYMBOLS 1 ... Spinning machine, 6 ... Draft device, 7 ... Pneumatic spinning device, 13 ... Winding device, 16a ... Middle bottom roller, 16b ... Middle top roller, 18a, 18b ... Apron belt (bottom belt, top belt), 50 ... Main body, 52, 152 ... support (exchange member), 54a to 54d ... roller (support member), 56a to 56d, 58a to 58d ... bearing (positioning part), 154 ... support member, P1 ... nip position (second) Nip position), P2... Nip position (first nip position).

Claims (6)

In a draft device for drafting a fiber bundle by a roller pair consisting of a bottom roller and a top roller, a tenserver that adjusts the tension of the bottom belt while the bottom belt is bridged between the bottom roller,
A main body extending in the direction of the rotation axis of the bottom roller;
A support member that is disposed in the main body and supports the bottom belt to set a first nip position of the fiber bundle by the top belt provided on the top roller and the bottom belt; and
The supporting member is disposed at a position where a distance between the first nip position and the second nip position of the fiber bundle by the bottom roller and the top roller is in a range of 11 mm to 22 mm. .   2. The tenserver according to claim 1, wherein the support member is provided so as to be adjustable such that a distance between the first nip position and the second nip position is in a range of 11 mm to 22 mm.   The tenserver according to claim 1 or 2, wherein the support member is a roller that is rotatable about a rotation shaft that extends in the same direction as the extending direction of the main body. A replacement part in which a positioning part for detachably positioning the support member is arranged in one direction,
The tenser according to any one of claims 1 to 3, wherein the main body portion detachably fixes the replacement member such that the positioning portion is arranged along a draft direction of the fiber bundle. A roller pair consisting of a bottom roller and a top roller;
Ten server according to any one of claims 1 to 4,
A draft device comprising: an apron belt that spans between the bottom roller and the ten server. A draft device according to claim 5;
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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