JP2013067896A - Draft device and spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a draft device and a spinning machine that have high positioning accuracy of a tensor bar with respect to a middle bottom roller.SOLUTION: The draft device comprises: a first supporting portion 41 for rotatably supporting a front bottom roller RF2; a second supporting portion 51 for rotatably supporting a middle bottom roller RM2; and a third supporting portion 61 for supporting a tensor bar TB2 for restricting tension and a position of an apron belt E2 wound around the middle bottom roller RM2. The third supporting portion 61 is integrally formed with the second supporting portion 51.

Description

  The present invention relates to a draft device and a spinning machine equipped with the draft device.

  2. Description of the Related Art Conventionally, spinning units and spinning machines are known that produce a spun yarn by drafting a fiber bundle with a draft device and twisting the drafted fiber bundle.

  The draft device includes a plurality of roller pairs such as a back roller pair, a middle roller pair, and a front roller pair from the upstream side to the downstream side in the draft direction of the fiber bundle. Each roller pair includes a bottom roller that is a driving roller and a top roller that rotates in contact with the bottom roller. Each top roller is integrally held by a draft cradle (hereinafter simply referred to as a cradle). Each bottom roller is integrally held by the apparatus frame.

  By the way, an apron belt is wound around each of the middle bottom roller and the middle top roller. The tension and position of the apron belt (the position in the direction parallel to the draft direction and the position in the direction perpendicular to the draft direction) are regulated by the ten server. For this reason, the installation state of the ten server affects the tension and position of the apron belt. When the tension and position of the apron belt are changed, the draft state is changed, and unevenness in thickness or the like is generated in the fiber bundle drafted by the draft device, which affects the quality of the fiber bundle.

  Conventionally, as a configuration for attaching the bottom tenserver to the draft device, a configuration is known in which a bracket is attached to the device frame of the draft device and the tenserver is attached to the bracket (for example, see Patent Document 1). In Patent Document 1, the ten server has a length that extends over two adjacent spinning units, and the central portion of the ten server is supported by a bracket. An apron belt for two spindles of adjacent spinning units is wound around both ends of the ten server.

  However, in the configuration of Patent Document 1, the ten server has a central portion that is supported and both end portions are free ends, and the length of the ten server is long. For this reason, when the apron belt is stretched, the bracket supporting the tenserver may be bent or the tenserver itself may be bent. In addition, if there is a difference in the tension of the apron belt of two adjacent spinning units, the apron belt may come to different positions on the left and right. Therefore, in the configuration of Patent Document 1, it is difficult to ensure the positioning accuracy of the tenserver with respect to the middle bottom roller.

  Further, a configuration is also known in which both ends of the ten server are supported instead of the center (see, for example, Patent Document 2). In the configuration of Patent Document 2, the tenserver has protrusions at both ends. Although not clearly described, in the configuration of Patent Document 2, the ten server is fixed in position by fitting convex portions formed at both ends into concave portions provided between the middle bottom roller and the middle top roller. .

  In the configuration of Patent Document 2, the concave portion provided between the middle bottom roller and the middle top roller needs to be large enough to fit the convex portions at both ends of the tenserver. Therefore, the support member that forms the concave portion is necessarily larger than the convex portion. That is, in the configuration of Patent Document 2, a space for providing a support member larger than the convex portion is required between the middle bottom roller and the middle top roller.

  In general, in a rough spinning machine or a (ring) spinning machine, the draft speed is slow, so the diameter of each draft roller is small. In such a draft device, since there is a space between the middle bottom roller and the middle top roller, a space for providing a support member larger than the convex portion can be easily secured. However, when the draft speed is high, such as a draft device of an air spinning machine, the diameter of each draft roller must be larger than the diameter of a draft roller of a ring spinning machine or the like. When the diameter of the draft roller is increased, there is not enough space between the middle bottom roller and the middle top roller, and it is not easy to secure a space for disposing the support member formed with the recess. Therefore, the configuration of Patent Document 2 is a configuration that is difficult to adopt for a draft device having a high draft speed.

JP 2008-81865 A JP 10-158942 A

  The present invention has been made to solve the above problems. An object of the present invention is to provide a draft device and a spinning machine with high positioning accuracy of a tenserver with respect to a middle bottom roller.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, the draft device of the first invention includes a first support part, a second support part, and a third support part. The first support portion rotatably supports the front bottom roller. The second support part rotatably supports the middle bottom roller. The third support part supports a tenserver that regulates the tension and position of the apron belt wound around the middle bottom roller. The third support part is disposed on at least one of the first support part and the second support part.

  The draft device of the second invention is the draft device of the first invention, and the third support portion is formed integrally with the second support portion.

  The draft device of the third invention is the draft device of the first invention, and the third support portion is formed integrally with the first support portion.

  A draft device according to a fourth aspect is the draft device according to the first aspect, wherein the first support portion, the second support portion, and the third support portion are integrally formed.

  A fifth invention is the draft device according to any one of the first to fourth inventions, wherein the third support portion has a protruding portion that fits into a recess formed in the tenserver and supports the tenserver. .

  A sixth invention is the draft device according to any one of the first to fifth inventions, wherein the third support portion includes a first divided support portion and a second divided support portion. Then, both ends of the tenserver are supported by the first divided support portion and the second divided support portion.

  A seventh invention includes the draft device according to any one of the first to sixth inventions, an air spinning unit, and a winding unit. The air spinning unit generates a spun yarn by twisting the fiber bundle drafted by the draft device with air. The winding unit winds the spun yarn generated by the pneumatic spinning unit onto the package.

  As effects of the present invention, the following effects can be obtained.

  According to the first invention, the positioning accuracy of the ten server and the middle bottom roller, which are important elements in the draft, is improved, so that the draft stability is improved.

  According to the second invention, the positioning accuracy of the tenserver with respect to the middle bottom roller is improved.

  According to the third aspect, even when the first support portion is large and the third support portion cannot be formed near the second support portion, the third support portion can be provided, and the tenth with respect to the middle bottom roller can be provided. Server positioning accuracy is improved.

  According to the fourth aspect of the invention, the position adjustment work between the middle bottom roller and the front bottom roller becomes unnecessary, and the positioning accuracy is improved. Further, the positioning accuracy of the tenserver with respect to the middle bottom roller is improved. Therefore, a stable fiber bundle can be generated by the draft device.

  According to the fifth aspect, the tenserver can be reliably supported even when the installation space for the draft device is limited.

  According to the sixth aspect, it is possible to suppress the bending of both ends of the ten server, and the position of the ten server with respect to the middle bottom roller is stabilized.

  According to the seventh aspect, since the positioning accuracy of the tenserver with respect to the middle bottom roller is high, the spun yarn can be generated from the fiber bundle drafted in a stable state, and the quality of the spun yarn generated by the spinning machine is improved.

1 is a front view of a spinning machine M according to Embodiment 1 of the present invention. The side view of the spinning unit U is simplified. The side view of the draft apparatus D in the draft position which concerns on Example 1 of this invention. FIG. 6 is a simplified plan view showing the periphery of the middle bottom roller RM2 and the front bottom roller RF2 of the draft device D. (A) Sectional view taken along line AA in FIG. 4 (B) Sectional view taken along line BB in FIG. FIG. 6 is a simplified plan view showing the periphery of a middle bottom roller RM2 and a front bottom roller RF2 of a draft device D according to Embodiment 2 of the present invention. Sectional drawing in the CC line | wire of FIG. FIG. 6 is a simplified plan view showing the periphery of a middle bottom roller RM2 and a front bottom roller RF2 of a draft device D according to Embodiment 3 of the present invention. Sectional drawing in the DD line | wire of FIG.

  Next, embodiments of the invention will be described with reference to the drawings.

  A draft device D and a spinning machine M according to a first embodiment of the present invention will be described with reference to FIGS.

  First, an outline of the spinning machine M will be described. In the present specification, “upstream” and “downstream” mean upstream and downstream in the traveling direction of the fiber bundle F and the spun yarn Y in the spinning unit U.

  As shown in FIGS. 1 and 2, the spinning machine M includes a plurality of spinning units U, a yarn splicing cart 3, a blower box 4, and a prime mover box 5. Each spinning unit U mainly includes a draft device D, a spinning device 11, a yarn clearer 12, a yarn slack eliminating device 13, and a winding device 21.

  As shown in FIG. 2, the draft device D drafts a fiber bundle (sliver) F supplied via a trumpet T from a can (not shown) arranged at the rear of the spinning unit U. The draft device D according to the present embodiment includes a plurality of roller pairs R whose feed speed is gradually increased from the upstream side to the downstream side of the fiber bundle F. The roller pair R includes top rollers RB1, RT1, RM1, and RF1 and bottom rollers RB2, RT2, RM2, and RF2 (see FIG. 3). The draft device D will be described in detail later.

  The spinning device 11 generates a spun yarn Y by twisting the fiber bundle F using a swirling airflow. Although the detailed description and illustration are omitted, the spinning device 11 includes a fiber guide portion, a swirl flow generating nozzle, and a hollow guide shaft body. The fiber guide unit guides the fiber bundle F sent from the draft device D to a spinning chamber formed inside the spinning device 11. The swirl flow generating nozzle is disposed around the path of the fiber bundle F and generates a swirl flow in the spinning chamber. By this swirl flow, the fiber ends of the fiber bundles F in the spinning chamber are reversed and swirled. The hollow guide shaft body guides the spun spun yarn Y from the spinning chamber to the outside of the spinning device 11. The driving and stopping of the spinning device are controlled by a unit controller (not shown). The spinning device 11 is an air spinning device that does not include a needle-like member and realizes the function of the needle-like member by the downstream end of the fiber guide portion, or a pair of air jet nozzles that twist in opposite directions. An air spinning device may be used.

  The yarn clearer 12 monitors abnormalities in the thickness of the spun yarn Y fed from the spinning device 11 and the presence or absence of contained foreign matter. When the yarn clearer 12 detects a yarn defect of the spun yarn Y, it transmits a yarn defect detection signal to a unit controller (not shown).

  The yarn slack eliminating device 13 draws the spun yarn Y from the spun device 11 by applying a predetermined tension to the spun yarn Y. Further, the tension is adjusted so that the fluctuation of the tension on the winding device 21 side is not transmitted to the spinning device 11 side. When working with the yarn splicing carriage 3, the yarn slack eliminating device 13 retains the spun yarn Y sent from the spinning device 11 and prevents the spun yarn Y from slackening.

  The winding device 21 winds the spun yarn Y fed from the spinning device 11 and forms a package P. The winding device 21 includes a cradle arm 22, a winding drum 23, and a traverse device 24. The cradle arm 22 rotatably supports the package P (bobbin). The winding drum 23 contacts the outer peripheral surface of the package P (bobbin) and rotates the package P (bobbin). The traverse device 24 traverses the spun yarn Y. The winding device 21 rotates the winding drum 23 while traversing the spun yarn Y by the traverse device 24, thereby rotating the package P (bobbin) and winding the spun yarn Y.

  When the unit controller receives the yarn defect detection signal from the yarn clearer 12, the unit controller immediately cuts the spun yarn Y with the cutter 14, and further stops the draft device D, the spinning device 11, and the like. The unit controller sends a control signal to the yarn splicing carriage 3 and travels to the front of the spinning unit U. Thereafter, the unit controller drives the spinning device 11 and the like again, causes the yarn joining cart 3 to perform yarn joining, and resumes winding. The spinning unit U may not include the cutter 14 and may stop the generation of the spun yarn Y and stop the spun yarn Y by stopping the supply of air to the spinning device 11.

  As illustrated in FIGS. 1 and 2, the yarn splicing cart 3 includes a cart unit 25, a splicer 26 loaded on the cart unit 25, a suction pipe 27, and a suction mouth 28. The yarn splicing cart 3 travels to the spinning unit U when a yarn break or yarn cut occurs in a spinning unit U. The suction pipe 27 sucks and captures the yarn end fed from the spinning device 11 and guides it to the splicer 26. The suction mouse 28 sucks and picks up the yarn end from the package P and guides it to the splicer 26. The splicer 26 performs yarn splicing between the guided yarn ends.

  The blower box 4 has a blower (suction source) disposed therein. The blower box 4 is connected to a main pipe (not shown) which is a suction conveyance pipe common to the spinning units U. The main pipe is arranged at the rear part (upstream side in the draft direction) of each spinning unit U. The blower box 4 sucks, conveys, and collects fiber waste generated in each spinning unit U through the main pipe.

  In the prime mover box 5, a motor that is a prime mover of the spinning machine M, a speed reducer for transmitting power to each part of the spinning machine M, and the like are disposed inside.

  Next, the draft device D will be described in detail. As shown in FIGS. 3 to 5, the draft device D includes a plurality of roller pairs R, a cradle 31, and a device frame 32.

  As shown in FIG. 3, as the plurality of roller pairs R, in this embodiment, a back roller pair RB, a third roller pair RT, a middle roller pair RM, and a front roller pair RF are provided. These roller pairs RB, RT, RM, RF are arranged at a predetermined interval from the upstream side to the downstream side of the fiber bundle F. Each roller pair RB, RT, RM, RF is composed of upper top rollers RB1, RT1, RM1, RF1 and lower bottom rollers RB2, RT2, RM2, RF2. The bottom rollers RB2, RT2, RM2, and RF2 are driving rollers, and the top rollers RB1, RT1, RM1, and RF1 are driven rollers that are driven to rotate in contact with the bottom rollers RB2, RT2, RM2, and RF2. The rotational speed of each roller pair RB, RT, RM, RF increases gradually from the upstream side toward the downstream side. A spinning device 11 is disposed on the downstream side of the front roller pair RF.

  The back top roller RB1, the third top roller RT1, the middle top roller RM1, and the front top roller RF1 are integrally and rotatably mounted on the cradle 31. The top rollers RB1, RT1, RM1, and RF1 for two spindles of the adjacent spinning unit U are mounted on the cradle 31 (see FIG. 1). The back bottom roller RB2, the third bottom roller RT2, the middle bottom roller RM2, and the front bottom roller RF2 are mounted on the apparatus frame 32 corresponding to the top rollers RB1, RT1, RM1, and RF1 of the cradle 31, respectively. The apparatus frame 32 is also equipped with bottom rollers RB2, RT2, RM2, and RF2 corresponding to two spindles of the adjacent spinning unit U.

  A ten server TB1 is disposed between the middle top roller RM1 and the front top roller RF1. The ten server TB1 regulates the tension and position of the apron belt E1 wound around the middle top roller RM1 (see FIG. 3). The ten server TB1 is mounted on the cradle 31 side.

  A ten server TB2 is disposed between the middle bottom roller RM2 and the front bottom roller RF2. The ten server TB2 regulates the tension and position of the apron belt E2 wound between the middle bottom roller RM2 (see FIG. 3). The ten server TB2 is mounted on the device frame 32 side. The structure for attaching the front bottom roller RF2, the middle bottom roller RM2, and the ten server TB2 to the apparatus frame 32 will be described in detail later.

  The cradle 31 is rotatable with respect to the apparatus frame 32 around a rotation shaft 33 provided on the upstream side. Therefore, by rotating the cradle 31, the top rollers RB1, RT1, RM1, and RF1 come in contact with and separate from the bottom rollers RB2, RT2, RM2, and RF2. The position where the cradle 31 is closed and the top rollers RB1, RT1, RM1, and RF1 are in contact with the bottom rollers RB2, RT2, RM2, and RF2 is a draft position. A position where the cradle 31 is opened for maintenance and the top rollers RB1, RT1, RM1, and RF1 are separated from the bottom rollers RB2, RT2, RM2, and RF2 is a non-draft position. Therefore, the cradle 31 can switch the top rollers RB1, RT1, RM1, and RF1 and the bottom rollers RB2, RT2, RM2, and RF2 between the draft position and the non-draft position.

  The turning operation of the cradle 31 is performed by the operator operating the handle 34. When the cradle 31 is closed to the draft position, the hook portion 35 at the lower end of the handle 34 is engaged with the fixed roller 36 on the apparatus frame 32 side, and the top rollers RB1, RT1, RM1, RF1 and the bottom rollers are engaged. The pressure contact state of RB2, RT2, RM2, and RF2 is maintained.

  Since the distance between each roller pair RB, RT, RM, RF is determined by the fiber length of the drafted fiber bundle (sliver) F, it is reviewed every time the type of the fiber bundle (sliver) F as the raw material is changed. For this purpose, among the bottom rollers RB2, RT2, RM2, and RF2, the middle bottom roller RM2 and the front bottom roller RF2 are fixed to the apparatus frame 32, but the back bottom roller RB2 and the third bottom roller RT2 are respectively connected to the apparatus frame. 32, the position can be changed upstream and downstream.

  Next, a structure for attaching the front bottom roller RF2, the middle bottom roller RM2, and the ten server TB2 to the apparatus frame 32, which is a characteristic part of the present invention, will be described.

  As shown in FIGS. 4 and 5, the front bottom roller RF2 is mounted on the front bottom roller shaft SF2. The front bottom roller shaft SF2 has a length over two spindles of adjacent spinning units U. A front bottom roller RF2 corresponding to two spindles of the adjacent spinning unit U is mounted on the front bottom roller shaft SF2. Both end portions of the front bottom roller shaft SF2 are rotatably supported by the first support portion 41. Although not shown in FIGS. 4 and 5, since the front bottom roller RF2 is a driving roller, a driving device for driving the front bottom roller RF2 is connected to the front bottom roller shaft SF2.

  As shown in FIG. 5A, the first support portion 41 includes a first base portion 42 and a first lid portion 43. The first base portion 42 forms a main body of the first support portion 41. The first base portion 42 is fixed to the device frame 32. The first lid portion 43 is fixed to the first base portion 42. The first base portion 42 and the first lid portion 43 are formed with semicircular concave portions 44 and 45 corresponding to the front bottom roller shaft SF2, respectively. A shaft hole 46 that rotatably supports the front bottom roller shaft SF2 is formed by fixing the first lid portion 43 to the first base portion 42 and combining the concave portions 44 and 45. The first base portion 42 is fixed to the first lid portion 43 with bolts 47. Although illustration is omitted, a bearing or the like is assembled in the shaft hole 46.

  As shown in FIGS. 4 and 5, the middle bottom roller RM2 is mounted on the middle bottom roller shaft SM2. The middle bottom roller shaft SM2 has a length over two spindles of adjacent spinning units U. A middle bottom roller RM2 corresponding to two spindles of the adjacent spinning unit U is mounted on the middle bottom roller shaft SM2. Both end portions of the middle bottom roller shaft SM2 are rotatably supported by the second support portion 51. Although not shown in FIGS. 4 and 5, since the middle bottom roller RM2 is a driving roller, a driving device for driving the middle bottom roller RM2 is connected to the middle bottom roller shaft SM2.

  As shown in FIG. 5, the second support portion 51 has a second base portion 52 and a second lid portion 53. The second base 52 forms a main body of the second support portion 51. The second base 52 is fixed to the device frame 32. The second lid part 53 is fixed to the second base part 52. The second base portion 52 and the second lid portion 53 are formed with semicircular concave portions 54 and 55 corresponding to the middle bottom roller shaft SM2, respectively. The second lid portion 53 is fixed to the second base portion 52 and the concave portions 54 and 55 are combined to form a shaft hole 56 that rotatably supports the middle bottom roller shaft SM2. The second base 52 is fixed to the second lid 53 with bolts 57. Although illustration is omitted, a bearing or the like is assembled in the shaft hole 56.

  As shown in FIG. 4, the ten server TB <b> 2 has a length over two spindles of adjacent spinning units U. The apron belt E2 is wound around the ten server TB2 between the two bottom spindles RM2 of the adjacent spinning unit U. Both end portions of the ten server TB2 are supported by a third support portion 61 formed integrally with the second support portion 51.

  Specifically, the third support portion 61 that supports the ten server TB2 includes a first divided support portion 61A and a second divided support portion 61B. The first divided support portion 61 </ b> A and the second divided support portion 61 </ b> B are each formed integrally with the second lid portion 53 of the second support portion 51. The first divided support portion 61 </ b> A and the second divided support portion 61 </ b> B are formed to face the second lid portion 53 of the second support portion 51. 61 A of 1st division | segmentation support parts and the 2nd division | segmentation support part 61B are symmetrical shapes, and are substantially the same shape. Hereinafter, even when the first divided support portion 61A and the second divided support portion 61B are described, the first divided support portion 61A and the second divided support portion 61B will be described as the third support portion 61 unless they need to be described separately.

  The position where the third support portion 61 is formed is downstream in the draft direction from the middle bottom roller shaft SM2 so that the ten server TB2 is located between the middle bottom roller RM2 and the front bottom roller RF2. The third support portion 61 is a protruding portion that protrudes with respect to the second lid portion 53 of the second support portion 51. The cross-sectional shape of the third support portion 61 is a square. In this embodiment, the ten server TB <b> 2 is attached to the third support portion 61 with the bolt 63.

  As shown in FIG. 5B, concave portions 71 corresponding to the third support portion 61 are formed at both ends of the ten server TB2. Further, a bolt hole is formed so that the third support portion 61 can be fitted into the recess 71 and fixed with the bolt 63.

  When attaching the ten server TB2 to the first divided support portion 61A and the second divided support portion 61B of the third support portion 61, first pass the apron belt E2 for two spindles of the adjacent spinning unit U through the ten server TB2. The apron belt E2 is wound between the middle bottom roller RM2 and the ten server TB2. Subsequently, the concave portions 71 at both ends of the ten server TB2 are fitted into the first divided support portion 61A and the second divided support portion 61B, respectively, and fixed with the bolts 63. The position of the third support 61 and the positions of the recesses 71 at both ends of the ten server TB2 are the tension and the position of the apron belt E2 (the position in the direction parallel to the draft direction and the position in the direction perpendicular to the draft direction). Is set in advance so as to be appropriate.

  The draft device D and the spinning machine M according to the present embodiment described above have the following effects.

  In the draft device D, the third support portion 61 that supports the tenserver TB2 is integrally formed with the second support portion 51 that rotatably supports the middle bottom roller RM2. For this reason, the positioning accuracy of the ten server TB2 with respect to the middle bottom roller RM2 is improved.

  The 3rd support part 61 provided in the draft apparatus D is a protrusion part which fits in the recessed part 71 formed in ten server TB2, and supports ten server TB2. This is a case where the installation space for the draft device D is limited because the third support portion 61 which is a protruding portion is provided on the second support portion 51 and the ten server TB2 is supported by the third support portion 61. However, the ten server TB2 can be reliably supported.

  The third support portion 61 includes a first split support portion 61A and a second split support portion 61B, and supports both ends of the tenserver TB2 by the first split support portion 61A and the second split support portion 61B. For this reason, bending of both ends of the ten server TB2 can be suppressed, and the position of the ten server TB2 with respect to the middle bottom roller RM2 is stabilized.

  Note that if the positioning accuracy of the ten server TB1 is poor, the fiber bundle F is not guided well to the front roller pair RF, so that the fiber bundle F is not guided by the spinning device 11 and becomes spoiled (fiber loss). 11, spinning cannot be performed normally, and the spun yarn Y is not spun from the spinning device 11. Further, even if the spun yarn Y is spun from the spinning device 11, thickness unevenness and twist unevenness occur in the spun yarn Y, and the quality deteriorates. In that respect, the spinning machine M of the first embodiment has the draft device D, the spinning device 11, and the winding device 21, and has a high positioning accuracy of the tenserver TB2 with respect to the middle bottom roller RM2, so that it is in a stable state. Thus, the spun yarn Y can be generated from the fiber bundle F drafted in step S1, and the quality of the spun yarn Y generated by the spinning machine M is improved.

  A draft device D and a spinning machine M according to a second embodiment of the present invention will be described with reference to FIGS. The second embodiment is largely different from the first embodiment in that the third support portion 61 that supports the ten server TB2 is formed integrally with the first support portion 41. Since the configuration other than the front bottom roller RF2, the middle bottom roller RM2, and the structure for attaching the ten server TB2 to the apparatus frame 32 is the same as that of the first embodiment, detailed description thereof will be omitted.

  As shown in FIGS. 6 and 7, both end portions of the ten server TB <b> 2 are connected to the first split support portion 61 </ b> A and the second split support portion 61 </ b> B of the third support portion 61 formed integrally with the first support portion 41. It is supported.

  More specifically, the third support portion 61 that supports the ten server TB2 is formed integrally with the first lid portion 43 of the first support portion 41. The position where the third support portion 61 is formed is upstream of the front bottom roller shaft SF2 in the draft direction so that the ten server TB2 is positioned between the middle bottom roller RM2 and the front bottom roller RF2. The third support portion 61 is a protruding portion that protrudes with respect to the first lid portion 43 of the first support portion 41. The cross-sectional shape of the third support portion 61 is a square.

  When attaching the ten server TB2 to the third support 61, first, the apron belt E2 of two spindles of the adjacent spinning unit U is passed through the ten server TB2, and the apron belt is interposed between the middle bottom roller RM2 and the ten server TB2. Wind E2. Subsequently, the concave portions 71 at both ends of the ten server TB2 are fitted into the first divided support portion 61A and the second divided support portion 61B, respectively, and fixed with the bolts 63. The position of the third support 61 and the positions of the recesses 71 at both ends of the ten server TB2 are the tension and the position of the apron belt E2 (the position in the direction parallel to the draft direction and the position in the direction perpendicular to the draft direction). Is set in advance so as to be appropriate.

  The draft device D and the spinning machine M according to the present embodiment described above have the following effects.

  In the draft device D and the spinning machine M, the third support portion 61 that supports the tenserver TB2 is formed integrally with the first support portion 41 that rotatably supports the front bottom roller RF2. For this reason, even if the first support portion 41 is large and the third support portion 61 cannot be formed near the second support portion 51, the first support portion 41 can be provided with the third support portion 61. The positioning accuracy of the ten server TB2 with respect to the middle bottom roller RM2 is improved.

  A draft device D and a spinning machine M according to a third embodiment of the present invention will be described with reference to FIGS. The third embodiment is greatly different from the first and second embodiments in that the first support portion 41, the second support portion 51, and the third support portion 61 are integrally formed. Since the configuration other than the front bottom roller RF2, the middle bottom roller RM2, and the structure for attaching the ten server TB2 to the apparatus frame 32 is the same as that of the first embodiment, detailed description thereof will be omitted.

  As shown in FIGS. 8 and 9, the first base portion 42 of the first support portion 41 and the second base portion 52 of the second support portion 51 are integrally formed. Further, the first lid portion 43 of the first support portion 41 and the second lid portion 53 of the second support portion 51 are integrally formed. Then, both end portions of the ten server TB2 are supported by the first divided support portion 61A and the second divided support portion 61B of the third support portion 61 formed integrally with the first support portion 41. The position where the third support portion 61 is formed is upstream of the front bottom roller shaft SF2 in the draft direction so that the ten server TB2 is positioned between the middle bottom roller RM2 and the front bottom roller RF2. The third support portion 61 is a protruding portion that protrudes with respect to the first lid portion 43 of the first support portion 41. The cross-sectional shape of the third support portion 61 is a square.

  When attaching the ten server TB2 to the third support 61, first, the apron belt E2 of two spindles of the adjacent spinning unit U is passed through the ten server TB2, and the apron belt is interposed between the middle bottom roller RM2 and the ten server TB2. Wind E2. Subsequently, the concave portions 71 at both ends of the ten server TB2 are fitted into the first divided support portion 61A and the second divided support portion 61B, respectively, and fixed with the bolts 63. The position of the third support 61 and the positions of the recesses 71 at both ends of the ten server TB2 are the tension and the position of the apron belt E2 (the position in the direction parallel to the draft direction and the position in the direction perpendicular to the draft direction). Is set in advance so as to be appropriate.

  The draft device D and the spinning machine M according to the present embodiment described above have the following effects.

  In the draft device D and the spinning machine M, the first support portion 41 that rotatably supports the front bottom roller RF2, the second support portion 51 that rotatably supports the middle bottom roller RM2, and the first support portion that supports the tenserver TB2. The three support portions 61 are integrally formed. For this reason, the position adjustment work between the middle bottom roller RM2 and the front bottom roller RF2 becomes unnecessary, and the positioning accuracy is improved. Further, the positioning accuracy of the ten server TB2 with respect to the middle bottom roller RM2 is improved. Therefore, the fiber bundle F in a stable state can be generated by the draft device D.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said Example, A various change is possible. For example, in the present embodiment, the spinning unit U of the spinning machine M is configured to draw the spun yarn Y from the spinning device 11 by the yarn slack eliminating device 13, but is not limited to this configuration. A delivery roller and a nip roller may be provided between the spinning device 11 and the yarn slack eliminating device 13, and the spun yarn Y may be pulled out by these rollers.

  Moreover, the shape of the 1st support part 41, the 2nd support part 51, and the 3rd support part 61 is not limited to the shape of this embodiment, A various shape can be taken.

M spinning machine U spinning unit 3 yarn splicing cart 4 blower box 5 prime mover box T trumpet D draft device 11 spinning device 12 yarn clearer 13 yarn slack eliminating device 14 cutter 21 winding device 22 cradle arm 23 winding drum 24 traverse device 25 cart Part 26 Splicer 27 Suction pipe 28 Suction mouse 31 Cradle 32 Device frame 33 Rotating shaft 34 Handle 35 Hook part 36 Fixed roller 41 First support part 42 First base part 43 First lid part 44, 45 Concave part 46 Shaft hole 47 Bolt 51 Second support portion 52 Second base portion 53 Second lid portion 54, 55 Recessed portion 56 Shaft hole 57 Bolt 61 Third support portion 63 Bolt 71 Recessed portion 71
F Fiber bundle Y Spinned yarn P Package

Claims (7)

A first support portion for rotatably supporting the front bottom roller;
A second support portion for rotatably supporting the middle bottom roller;
A draft device comprising: a third supporter for supporting a tenserver that regulates the tension and position of the apron belt wound around the middle bottom roller;
The draft device according to claim 3, wherein the third support portion is disposed on at least one of the first support portion and the second support portion. The draft device according to claim 1,
The draft device according to claim 3, wherein the third support part is formed integrally with the second support part. The draft device according to claim 1,
The draft device according to claim 3, wherein the third support part is formed integrally with the first support part. The draft device according to claim 1,
The draft device, wherein the first support portion, the second support portion, and the third support portion are integrally formed.   The draft device according to any one of claims 1 to 4, wherein the third support portion has a protrusion that fits into a recess formed in the tenserver and supports the tenserver. A draft device characterized by that. A draft device according to any one of claims 1 to 5,
The third support part includes a first split support part and a second split support part,
The draft device characterized in that both ends of the tenserver are supported by the first divided support portion and the second divided support portion. The draft device according to any one of claims 1 to 6,
An air spinning section for producing a spun yarn by twisting the fiber bundle drafted by the draft device with air;
A spinning machine comprising: a winding unit that winds the spun yarn generated by the pneumatic spinning unit into a package.

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