JP2011231418A - Draft device of spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a draft device of a spinning machine having a fiber bundle guide guiding a fiber bundle held at the prescribed position with high accuracy, and capable of suppressing the unevenness of yarn quality among spindles.SOLUTION: A fiber bundle guide 26 is disposed between an apron draft part and a front roller. The fiber bundle guide 26 is integrally formed by sheet-metal working at the front end of a holder 25 made of a sheet metal holding the fiber bundle guide 26 at the predetermined position, the holder 25 is supported at the base end of the holder 25 by a support 23 formed on an apron cradle 20. The fiber bundle guide 26 is connected to the front end of the holder 25, and is provided extending parallel to middle top rollers 19 at the right and left sides.

Description

  The present invention relates to a draft device for a spinning machine.

  In the ring spinning machine, an apron draft portion is disposed between the front roller and the back roller so that the coarse yarn is gripped and drafted between the top apron and the bottom apron. The fiber bundle that moves (runs) while being drafted in the draft device is not subjected to pressure from the apron or the roller between the gripping portion of the top apron and the bottom apron and the gripping portion of the front top roller and the bottom top roller. To move freely. When the range in which the fiber bundle moves freely (hereinafter referred to as the free gauge range) is wide (long), while the fiber bundle moves through the free gauge range, short fibers are detached from the fiber bundle, It becomes easy to increase the fibers that become fluff.

  Conventionally, a draft device has been proposed in which a guide element is provided between the apron draft portion and the front roller so as to avoid short fibers from being detached from the drafted fiber bundle (see, for example, Patent Document 1). ). Patent Document 1 discloses two embodiments in which a guide element 51 is fixed to a draft device as shown in FIG. In the first embodiment, the guide element 51 extends over the entire length of one section of the cage (cradle) 50. The end of the guide element 51 is gripped by the holding elements 510a and 510b. The holding element 510a is fixedly attached to the end of the cage 50 by means of a fixing element 512, for example in the form of a pin or a screw. The holding element 510a is manufactured as a leaf spring made of spring steel, for example. The retaining element 510a is snapped from the side to the end of the cage 50 in a hole aligned with the securing element 512 with a securing pin. In the second embodiment, as shown in the right part of FIG. 10, the relatively short guide element 51 is composed of two holding elements 510 a and 510 b, each having a flange 514 at the end thereof, near the spacer piece 52. It is inserted into the right longitudinal edge.

  Also, as shown in FIG. 11, there is a draft device in which a guide portion 63 including two rollers 63a and 63b is provided between an apron draft portion 61 and a back roller 62.

JP-T-2006-505703

  In Patent Document 1, since the guide element and the holding member for attaching the guide element to the cage (cradle) are composed of a plurality of parts, if there is an attachment error when attaching the guide element to the holding member, The action varies between them. As a result, adverse effects on the yarn quality of the spun yarn, particularly uneven yarn thickness, occur between the weights. Further, in the draft device shown in FIG. 11 in which the guide unit 63 including two rollers 63a and 63b is provided between the apron draft unit 61 and the back roller, the guide unit 63 is configured by a plurality of parts. This causes similar problems.

  The present invention has been made in view of the above-described conventional problems, and its purpose is to hold the fiber bundle guide portion for guiding the fiber bundle accurately at a predetermined position and suppress variation in the yarn quality between the weights. It is an object of the present invention to provide a drafting device for a spinning machine that can be used.

  In order to achieve the above-mentioned object, the invention according to claim 1 is a drafting device for a spinning machine having an apron draft unit integrated with two spindles. And a fiber bundle guide part is provided between at least one of the apron draft part and the front roller and between the apron draft part and the back roller, and the fiber bundle guide part is provided with the fiber bundle guide part. Are integrally formed by sheet metal processing on the distal end side of a sheet metal holding member that holds the plate in the set position, and the holding member is supported by the support portion on the proximal end side. Here, the support portion only needs to be able to support the base end side of the holding member formed by sheet metal processing, and a support shaft of a middle top roller to which a part of the apron cradle or the apron cradle is attached is used as the support portion. The

  In the present invention, a fiber bundle guide portion that is disposed between the apron draft portion and the front roller or between the apron draft portion and the back roller and serves to narrow the range in which the fiber bundle moves in a free state, and the fiber bundle Since the holding member that holds the guide portion at an appropriate setting position is integrally formed by sheet metal processing, the number of components is reduced, and variations in action between weights due to attachment errors are suppressed. Therefore, the fiber bundle guide portion for guiding the fiber bundle is accurately held at a predetermined position, and variation in the yarn quality between the weights can be suppressed.

  The invention according to claim 2 is the invention according to claim 1, wherein the fiber bundle guide portion is disposed between the apron draft portion and the front roller, and the fiber bundle guide portion is formed in the fiber bundle. It has a curved portion that comes into contact. In this invention, since the fiber bundle that has exited the apron draft portion moves while contacting the curved portion of the fiber bundle guide portion, there is a range in which the fiber bundle moves in a free state between the apron draft portion and the front roller. Narrowing and improving yarn quality.

  According to a third aspect of the present invention, in the invention of the second aspect, the fiber bundle guide portion is formed such that the distal end side of the holding member extends obliquely downward and is bent backward from the lower side to form the curved portion. And a wall portion extending upwardly from the curved portion. It is normal for the fiber bundle to pass under the fiber bundle guide portion in contact with the curved portion. However, if there is a part of the fiber that protrudes long on the surface of the fiber bundle, a part of the fiber rarely passes over the curved part and the whole fiber bundle passes over the fiber bundle guide part. There is a risk of becoming. In this invention, since it has a wall portion that extends upward continuously from the curved portion formed by bending backward from the lower side, even if there is a portion where a part of the fiber is long on the surface of the fiber bundle, It is suppressed by the wall part that a part of the fiber passes the upper side of the fiber bundle guide part, and the entire fiber bundle is suppressed from passing over the fiber bundle guide part.

  According to a fourth aspect of the present invention, in the invention of the second aspect, the fiber bundle guide portion includes a flat portion extending forward from the curved portion along the traveling direction of the fiber bundle. Therefore, in this invention, compared with the case where the fiber bundle moves in contact with only the curved portion of the fiber bundle guide portion, the range in which the fiber bundle moves in a free state is narrowed, and the yarn quality is further improved.

  According to a fifth aspect of the present invention, in the invention of the second aspect, the fiber bundle guide portion is bent from the lower side to the front upper side and then to the rear side while the front end side of the holding member extends obliquely downward, and A curved portion is formed. In this invention, even if there is a part where a part of the fiber protrudes long on the surface of the fiber bundle, the curved part is formed on the front side of the part that extends obliquely downward by extending the tip of the holding member. Part of the fibers is prevented from passing over the fiber bundle guide part, and the entire fiber bundle is prevented from passing over the fiber bundle guide part.

  A sixth aspect of the present invention is the fiber bundle according to any one of the first to fifth aspects, wherein the fiber bundle is disposed between the apron draft portion and the back roller as the fiber bundle guide portion. A guide part is provided, and the fiber bundle guide part has a pair of front and rear guide parts having a circular arc cross section. In the present invention, even in the fiber bundle guide portion provided between the apron draft portion and the back roller, the guide portion for guiding the fiber bundle is accurately held at a predetermined position, thereby suppressing variation in yarn quality between weights. can do.

  According to a seventh aspect of the present invention, in the sixth aspect of the present invention, a front guide portion of the pair of front and rear guide portions is formed to be removable. Of the set of guide portions that constitute the fiber bundle guide portion disposed between the apron draft portion and the back roller, the guide portion disposed on the front side is more important than the guide portion disposed on the rear side. Depending on the type of yarn, there is a case where it is desired to use a fiber bundle guide portion having only a rear guide portion. In this invention, since the front guide portion is configured to be removable, the front guide portion is removed while the rear guide portion is held in an appropriate position, so that the state is suitable for spinning conditions. It can be easily changed.

  According to the present invention, the fiber bundle guide portion that guides the fiber bundle is accurately held at a predetermined position, and variation in the yarn quality between the weights can be suppressed.

The fragmentary sectional side view of the draft device in a 1st embodiment. The model perspective view which shows the relationship between a fiber bundle guide member and a top apron. (A) is a schematic perspective view which shows the relationship between a fiber bundle guide member and an apron cradle, (b) is an enlarged side view of a fiber bundle guide part. The fragmentary sectional side view of the draft apparatus in 2nd Embodiment. The fragmentary sectional side view of the draft apparatus in 3rd Embodiment. The perspective view of a fiber bundle guide member. (A) is a fragmentary sectional side view of the draft device of another embodiment, (b) is a perspective view of a fiber bundle guide member. (A), (b) is an enlarged side view of the fiber bundle guide part of another embodiment, respectively. The sectional side view which shows the fiber bundle guide member of another embodiment. The model perspective view of a prior art. The schematic diagram of another prior art.

(First embodiment)
Hereinafter, a first embodiment in which the present invention is embodied in a double spindle integrated draft device of a spinning machine will be described with reference to FIGS.

  As shown in FIG. 1, the draft device 10 is provided with an apron draft portion 12 behind the front roller 11. The front roller 11 includes a front bottom roller 11a and a front top roller 11b. The front bottom roller 11a is supported by a roller stand (not shown), and the front top roller 11b is supported by a weighting arm 13 disposed above the bottom roller via a support arm (not shown).

  The apron draft unit 12 includes a bottom apron 14 and a top apron 15. The bottom apron 14 is wound around a ten server 16 and a middle bottom roller 17. The top apron 15 is supported with respect to the support shaft 18 and a middle top roller 19 rotatably supported at both ends of a support shaft 18 supported by a support arm (not shown) fixed to the weighting arm 13. The apron cradle 20 is wound around.

  As shown in FIG. 3A, the apron cradle 20 has a cradle body 21 having a substantially T-shape. As shown in FIGS. 2 and 3A, the cradle main body 21 has a pair of arcuate portions 21a formed near the base end in contact with the outer peripheral surface of the support shaft 18 by a biasing means (not shown). The top apron 15 is held in a state of urging the top apron 15 toward the bottom apron 14 side. A pair of left and right apron guides 22 are fixed to the front end side of the cradle body 21, and the top apron 15 is wound around the middle top roller 19 and the apron guide 22. The cradle main body 21 is provided with a restricting portion 21 b that restricts the movement of the top apron 15 in the width direction at substantially the same interval as the width of the top apron 15. The pair of left and right top aprons 15 are supported at symmetrical positions with the weighting arm 13 in between.

  In the cradle body 21, a support portion 23 is formed between a pair of apron guides 22, and a fiber bundle guide member 24 is supported on the support portion 23. The fiber bundle guide member 24 includes a fiber bundle guide portion 26 disposed between the apron draft portion 12 and the front roller 11, and a sheet metal holding member 25 that holds the fiber bundle guide portion 26 at a predetermined setting position. It is integrally formed by sheet metal processing.

  As shown in FIGS. 2 and 3A, the holding member 25 extends in parallel with the apron guide 22 between the pair of apron guides 22 and is attached to the support portion 23 at the attachment portion 25a formed on the base end side. It is attached. The fiber bundle guide portion 26 is provided so as to be continuous with the distal end side of the holding member 25 and to extend in parallel with the middle top rollers 19 on both the left and right sides. More specifically, the fiber bundle guide portion 26 has a distal end side of the holding member 25 extending obliquely downward, and is bent backward from the lower side as shown in FIG. The shape is formed and has a wall portion 26b extending continuously upward from the curved portion 26a, that is, the side surface is formed in a substantially water droplet shape as a whole. As shown in FIG. 1, the fiber bundle guide member 24 is disposed so that the fiber bundle F moves in contact with the lower surface of the curved portion 26 a of the fiber bundle guide portion 26.

  As shown in FIGS. 2 and 3A, a distance clip 27 is fixed to the cradle body 21 below the holding member 25. The distance clip 27 adjusts the opening amount of the upper and lower apron tips according to the yarn count and fiber type, that is, the distance between the tip of the bottom apron 14 and the tip of the top apron 15, and the cradle body 21 and the tenserver. This is for adjusting the distance to the 16. As the distance clip 27, a distance clip 27 having an appropriate opening amount according to the spinning condition is attached.

Next, the operation of the apparatus configured as described above will be described.
The bottom apron 14 is rotated by the rotation of the middle bottom roller 17. Then, the top apron 15 is rotated in synchronization with the bottom apron 14 by contact pressure with the bottom apron 14, and the fiber bundle F is transferred together with the bottom apron 14. The top apron 15 is guided at the upper travel portion by the restricting portion 21b, restricted in movement in the width direction, and moves at a predetermined position.

  The fiber bundle F transferred while being gripped by the bottom apron 14 and the top apron 15 is gripped by the middle bottom roller 17 and the middle top roller 19 and stretched due to the difference between the rotational speed of the front roller 11 and the rotational speed of the apron. It is. The opening amounts of the tip portions of the bottom apron 14 and the top apron 15 are appropriately adjusted by the distance clip 27 according to the yarn count and fiber type, and the fiber bundle F is attached to the middle bottom roller 17 and the middle top roller 19. It moves toward the space between the front bottom roller 11a and the front top roller 11b while being gripped with an appropriate gripping pressure.

  The fiber bundle F moves freely without being subjected to pressure by the apron or the roller from the gripping portion by the bottom apron 14 and the top apron 15 to the gripping portion by the front bottom roller 11a and the front top roller 11b. To do. Since the fiber bundle F is a state in which a large number of fibers are bundled and not yet twisted, the fiber bundle F has a wide range (free gauge range) in which the fiber bundle F moves in a free state. While F moves in the free gauge range, short fibers are detached from the fiber bundle F, and fibers that become fluff are likely to increase.

  However, the fiber bundle guide portion 26 is disposed between the front roller 11 and the apron draft portion 12, and the fiber bundle F contacts the lower surface of the curved portion 26a of the fiber bundle guide portion 26 and receives pressure from the curved portion 26a. The free gauge range becomes narrower and shorter. Therefore, while the fiber bundle F moves in the free gauge range, short fibers are prevented from detaching from the fiber bundle F, and the number of fibers that become fluff is difficult to increase.

  It is normal for the fiber bundle F to pass through the lower side of the fiber bundle guide portion 26 while being in contact with the lower surface of the curved portion 26a. However, when there is a part in which a part of the fiber protrudes long on the surface of the fiber bundle F, if a guide element having a circular cross section is used as in Patent Document 1, a part of the fiber passes over the guide part. Thus, the entire fiber bundle F may pass over the fiber bundle guide portion 26 in some cases. However, since the fiber bundle guide portion 26 has a wall portion 26b that extends upward continuously from the curved portion 26a, even if there is a portion of the fiber that protrudes long on the surface of the fiber bundle F, Part of the fiber bundle guide portion 26 is prevented from passing over the wall portion 26b, and the entire fiber bundle F is prevented from passing over the fiber bundle guide portion 26.

  In addition, the fiber bundle guide member 24 has fewer component parts because the fiber bundle guide portion 26 and the holding member 25 that holds the fiber bundle guide portion 26 in an appropriate setting position are integrally formed by sheet metal processing. As a result, the number of mounting steps is reduced, and the variation in action due to the difference in the position of the fiber bundle guide portion 26 between the weights due to the attachment error between the holding member 25 and the fiber bundle guide portion 26 is suppressed. .

According to this embodiment, the following effects can be obtained.
(1) The fiber bundle guide portion 26 is integrally formed by sheet metal processing on the distal end side of a sheet metal holding member 25 that holds the fiber bundle guide portion 26 at a set position. It is supported by the support part 23. A fiber bundle guide portion 26 that plays a role of narrowing the range in which the fiber bundle F moves in a free state and a holding member 25 that holds the fiber bundle guide portion 26 in an appropriate setting position are integrally formed by sheet metal processing. For this reason, the number of components is reduced, and variations in action due to the difference in position of the fiber bundle guide portion 26 between the weights due to attachment errors are suppressed. Therefore, the fiber bundle guide portion 26 that guides the fiber bundle F is accurately held at a predetermined position, and variations in the yarn quality between the weights can be suppressed.

  (2) The fiber bundle guide portion 26 is disposed between the apron draft unit 12 and the front roller 11, has a curved portion 26a that contacts the fiber bundle F, and the fiber bundle F exiting the apron draft unit 12 is It moves while contacting the curved portion 26a of the fiber bundle guide portion. Therefore, the range in which the fiber bundle F moves in a free state between the apron draft unit 12 and the front roller 11 is narrowed, and the yarn quality is improved.

  (3) The fiber bundle guide portion 26 has the distal end side of the holding member 25 extending obliquely downward, and is bent backward from the lower side to form a curved portion 26a, and a wall portion 26b extending upward continuously from the curved portion 26a. Have Therefore, even if there is a part where a part of the fiber is long on the surface of the fiber bundle F, the wall part 26b suppresses a part of the fiber from passing over the fiber bundle guide part 26, and the fiber bundle F The whole is prevented from passing over the fiber bundle guide portion 26.

  (4) The holding member 25 is attached to a support portion 23 formed on the apron cradle 20. Therefore, compared to a configuration in which the holding member 25 is attached to a support portion provided at a place other than the apron cradle 20, the fiber bundle guide portion 26 can be easily attached in a state of being held at an appropriate setting position.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIG. In this embodiment, the shape of the fiber bundle guide portion 26 of the fiber bundle guide member 24 is different from that of the first embodiment, and other configurations are the same. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, the fiber bundle guide portion 26 is different from the first embodiment in the shape and position of the bending portion 26a, and is a flat portion 26c extending forward from the bending portion 26a along the traveling direction of the fiber bundle F. It has. Specifically, the fiber bundle guide portion 26 has a curved portion 26a formed so that the front end side of the holding member 25 extends obliquely downward and protrudes rearward, and the flat portion 26c extends from the curved portion 26a to the front bottom roller 11a. And the front top roller 11b are formed so as to extend toward the grip portion of the fiber bundle F. The fiber bundle guide member 24 is arranged so that the fiber bundle F moves in contact with the entire lower surface of the flat portion 26c of the fiber bundle guide portion 26. Specifically, the flat portion 26c is disposed so as to extend substantially horizontally at a position slightly lower than the gripping portion of the fiber bundle F by the front bottom roller 11a and the front top roller 11b.

Therefore, according to the second embodiment, the following effects can be obtained in addition to the same effects as (1), (2) and (4) of the first embodiment.
(5) The fiber bundle guide portion 26 includes a flat portion 26c that extends forward from the curved portion 26a along the traveling direction of the fiber bundle F, and the fiber bundle F moves in contact with the entire lower surface of the flat portion 26c. . Therefore, compared with the case where the fiber bundle F moves in contact with only the curved portion 26a of the fiber bundle guide portion 26, the range in which the fiber bundle F moves in a free state is narrowed, and the yarn quality is further improved.

  (6) The fiber bundle guide portion 26 includes a flat portion 26c that extends forward from the curved portion 26a along the traveling direction of the fiber bundle F as a guide portion for guiding the fiber bundle F. Accordingly, it is easier to bring the guide portion closer to the gripping portion of the fiber bundle F by the front bottom roller 11a and the front top roller 11b compared to the conventional technique using a rod-shaped guide, and the range for guiding the fiber bundle F is widened. The degree of freedom to do is increased.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. In this embodiment, in addition to the fiber bundle guide member 24 that guides the fiber bundle F between the apron draft unit 12 and the front roller 11, the fiber that guides the fiber bundle F between the apron draft unit 12 and the back roller. The point which provided the bundle guide member differs from 1st Embodiment, and the other structure is the same. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the fiber bundle guide member 29 includes a fiber bundle guide portion 31 disposed between the apron draft portion 12 and the back roller 28, and a sheet metal that holds the fiber bundle guide portion 31 in a predetermined setting position. The holding member 30 made of metal is integrally formed by sheet metal processing. In the holding member 30, an attachment portion 30 a formed at the base end is fitted and fixed to the rear end portion 21 c of the cradle body 21.

  As shown in FIGS. 5 and 6, the fiber bundle guide portion 31 is continuous with the distal end side of the holding member 30 and is a pair of front and rear guide portions provided to extend in parallel with the middle bottom roller 17, that is, a first guide portion. A first guide part 32 and a second guide part 33 are provided. The first guide portion 32 and the second guide portion 33 are both formed in a side semicircular arc shape, and the first guide portion 32 disposed on the rear side, that is, the side close to the back roller 28, has a semicircular arc projecting downward. The second guide portion 33 disposed in the front and disposed on the front side is disposed in a state where the semicircular arc is convex upward. As shown in FIG. 5, the fiber bundle guide member 29 is such that the lower surface of the first guide portion 32 is lower than the grip portion of the fiber bundle F by the back roller 28, and the upper surface of the second guide portion 33 is the bottom apron. 14 and the top apron 15 are arranged so as to be almost at the same height as the gripping portion of the fiber bundle F. In this embodiment, after the fiber bundle F that has come out from the back roller 28 moves downward and forward, the fiber bundle F contacts the lower surface of the first guide portion 32 and is changed so that the moving direction is upward and forward. 2 It contacts the upper surface of the guide part 33 and moves so that the moving direction is directed to the grip part of the fiber bundle F by the bottom apron 14 and the top apron 15.

Therefore, according to this 3rd Embodiment, in addition to the effect similar to (1)-(4) of 1st Embodiment, the following effects can be acquired.
(7) A fiber bundle guide portion 31 disposed between the apron draft portion 12 and the back roller 28 is provided, and the fiber bundle guide portion 31 is made of a sheet metal that holds the fiber bundle guide portion 31 in a set position. The holding member 30 is integrally formed on the distal end side by sheet metal processing, and the holding member 30 is supported on the rear end portion 21c of the cradle body 21 as a support portion on the proximal end side. Therefore, also in the fiber bundle guide portion 31 provided between the apron draft unit 12 and the back roller 28, the fiber bundle guide portion 31 for guiding the fiber bundle F is accurately held at a predetermined position, and the yarn quality weight Variations between them can be suppressed.

  (8) The fiber bundle guide portion 31 has a pair of front and rear first guide portions 32 and second guide portions 33 having a circular arc cross section. Then, after the fiber bundle F that has come out of the back roller 28 moves downward and forward, the fiber guide F is changed so as to come into contact with the lower surface of the first guide portion 32 and the moving direction is upward and forward. The upper apex 33 is brought into contact with the upper apron 33 so that the moving direction is directed toward the gripping portion of the fiber bundle F by the bottom apron 14 and the top apron 15. Accordingly, the pressing force on the fiber bundle F becomes stronger than when the two arcuate guide portions contact the fiber bundle F on the same side.

The embodiment is not limited to the above, and may be embodied as follows, for example.
A fiber bundle guide member 29 that guides the fiber bundle F between the apron draft portion 12 and the back roller 28 has a pair of front and rear first guide portions 32 and second guide portions 33 formed integrally with the holding member 30. It is not limited to the configuration. For example, as shown in FIGS. 7A and 7B, the first guide portion 32 disposed on the rear side is formed integrally with the holding member 30, and the second guide portion 33 on the front side is formed detachably. It is good also as composition which has. The holding member 30 is formed in a substantially L-shaped side surface, and a first guide portion 32 having a substantially circular cross section is formed on the tip side thereof. The second guide portion 33 is formed with a pair of latching pieces 33a and 33b near the center of both long sides of the rectangular metal plate, and the metal plate is formed in a quarter arc shape so that each latching piece 33a is formed. , 33b are attached in a state of being hooked in a hooking hole 30b formed in the holding member 30.

  Of the pair of guide portions 32 and 33 constituting the fiber bundle guide portion 31 disposed between the apron draft portion 12 and the back roller 28, the second guide portion 33 disposed on the front side is disposed on the rear side. This is less important than the first guide portion 32, and depending on the type of yarn, it may be desired to use the fiber bundle guide portion 31 having only the first guide portion 32 on the rear side. In this embodiment, since the front-side second guide portion 33 is configured to be removable, the front-side second guide portion 33 is removed while the rear-side first guide portion 32 is held at an appropriate position. Thus, it is possible to easily change to a state suitable for the spinning conditions.

  The shape of the fiber bundle guide portion 26 disposed between the apron draft portion 12 and the front roller 11 is not limited to the shape of the first embodiment or the second embodiment. For example, as shown in FIG. 8A, as the shape of the fiber bundle guide portion 26 configured to guide the fiber bundle F with the bending portion 26a, the bending portion is bent backward from the lower side of the distal end side of the holding member 25. 26a may be formed, and the length of the wall portion 26b extending upward continuously from the curved portion 26a may be increased. In this case, since the length of the wall part 26b is longer than that of the fiber bundle guide part 26 of the first embodiment, even if there is a part of the fiber that protrudes long on the surface of the fiber bundle F, The function of the wall part 26b which prevents a part from passing the upper side of a fiber bundle guide part improves. As a result, the entire fiber bundle F is prevented from passing over the fiber bundle guide portion 26.

  As shown in FIG. 8 (b), the shape of the fiber bundle guide portion 26 is formed such that the distal end side of the holding member 25 extends obliquely downward and is bent from the lower side to the upper front side and then rearward to form a curved portion 26a. It may be a different shape. Also in this case, on the apron draft 12 side from the curved portion 26a, the wall that prevents a portion of the fiber protruding from the surface of the fiber bundle F from passing through the upper side of the fiber bundle guide portion 26 is prevented. The part 26b exists for a long time. Therefore, even if there is a part of the fiber bundle F that is partly long, the fiber part is prevented from passing over the fiber bundle guide part 26, and the entire fiber bundle F is the fiber bundle. A state of passing over the guide portion 26 is avoided.

  The supporting part that supports the fiber bundle guide members 24 and 29 is only required to be able to support the proximal end side of the holding members 25 and 30 formed by sheet metal processing, and a part of the apron cradle 20 or the apron cradle 20 is attached. The support shaft 18 or the like of the middle top roller 19 may be used as a support portion. For example, as shown in FIG. 9, a fiber bundle guide member 29 disposed between the apron draft 12 and the back roller 28 may be attached to the support shaft 18 instead of being attached to the apron cradle 20. The fiber bundle guide member 29 includes a pair of left and right attachment portions 34 attached to the support shaft 18. The pair of left and right attachment portions 34 have a pair of clamping pieces 34 a that clamp the support shaft 18, and are attached to the support shaft 18 in a state of being positioned outside the pair of arc portions 21 a of the apron cradle 20.

  The shape of the apron cradle 20 is not limited to the shape used in the embodiment. For example, instead of forming the restricting portion 21 b for restricting the movement of the top apron 15 in the width direction in the cradle body 21, a restricting portion may be provided in the apron guide 22.

  The fiber bundle guide part should just be provided in at least one between the apron draft part 12 and the front roller 11 and between the apron draft part 12 and the back roller 28. Therefore, when the fiber bundle guide part 31 is provided between the apron draft part 12 and the back roller 28, the fiber bundle guide part 26 may not be provided between the apron draft part 12 and the front roller 11.

  ○ The bottom apron 14 is not limited to a configuration in which the bottom apron 14 is wound around one ten server 16 and the middle bottom roller 17, but the ten servers 16, the middle bottom roller 17, and the ten servers arranged below the middle bottom roller 17. The structure wound around may be sufficient.

  The present invention is not limited to the drafting device of a spinning machine, and may be applied to a drafting device of another spinning machine such as a rough spinning machine or a binding spinning machine.

  F ... Fiber bundle, 10 ... Draft device, 11 ... Front roller, 12 ... Apron draft part, 21c ... Rear end part as support part, 23 ... Support part, 25, 30 ... Holding member, 26, 31 ... Fiber bundle guide Part, 26a ... curved part, 26b ... wall part, 26c ... flat part, 28 ... back roller, 32 ... first guide part as guide part, 33 ... second guide part as guide part.

Claims (7)

A drafting device for a spinning machine having an apron draft unit integrated with two spindles,
A fiber bundle guide part is provided between at least one of the apron draft part and the front roller and between the apron draft part and the back roller, and the fiber bundle guide part sets the fiber bundle guide part. A drafting device for a spinning machine, which is integrally formed by sheet metal processing on a distal end side of a sheet metal holding member held at a position, and the holding member is supported by a support portion on a proximal end side.   2. The draft device for a spinning machine according to claim 1, wherein the fiber bundle guide portion is disposed between the apron draft portion and a front roller, and the fiber bundle guide portion has a curved portion that contacts the fiber bundle.   The fiber bundle guide portion has a wall portion that extends obliquely downward at the front end side of the holding member, is bent backward from the lower side to form the curved portion, and extends upward continuously from the curved portion. A draft device for a spinning machine as described in 2.   3. The draft device for a spinning machine according to claim 2, wherein the fiber bundle guide portion includes a flat portion extending forward from the curved portion along a traveling direction of the fiber bundle.   3. The draft device for a spinning machine according to claim 2, wherein the fiber bundle guide portion extends obliquely downward at a front end side of the holding member and is bent from a lower side to a front upper side and then rearward to form the curved portion.   The fiber bundle guide portion includes a fiber bundle guide portion disposed between the apron draft portion and a back roller, and the fiber bundle guide portion has a pair of front and rear guide portions having an arcuate cross section. The draft device of the spinning machine as described in any one of Claims 1-5.   The draft device for a spinning machine according to claim 6, wherein a front guide portion of the pair of front and rear guide portions is detachable.

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