JP2015178687A - Belt guide roller, cleaning device, draft machine and spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning device which can prevent a rotation failure even when cotton fly is wound around a belt guide roller.SOLUTION: A first roller (belt guide roller) 67 includes a roller body 30, a roller shaft 50 of the roller body 30, and a shaft attachment part 81. The roller body 30 comes into contact with a cleaning belt for cleaning a draft roller to guide the cleaning belt. The shaft attachment part 81 is attached to cover at least a part of an external surface of the roller shaft 50. The roller body 30 includes recesses 34a and 35a that are recessed in an axial direction of the roller shaft 50, formed thereon, where the shaft attachment part 81 is entered in the recesses 34a and 35a.

Description

  The present invention mainly relates to a belt guide roller for guiding a cleaning belt for cleaning a draft roller.

  2. Description of the Related Art Conventionally, in a spinning machine, a configuration including a draft device for drafting a fiber bundle (sliver) is known. The draft device includes a plurality of draft roller pairs each composed of two opposing rollers, and the fiber bundle can be drafted by rotating the draft roller pairs at different speeds.

  When a fiber bundle is drafted with a draft device, the fibers of the fiber bundle may adhere to the outer peripheral surface of the draft roller. If a large amount of foreign matter adheres to the outer peripheral surface of the draft roller, the quality of the yarn generated in the downstream spinning device may be degraded, or yarn breakage may occur. Therefore, in order to avoid these problems, a configuration for cleaning the outer peripheral surface of the draft roller in the draft device has been proposed.

  Patent Document 1 discloses a belt-type cleaning device. The cleaning device includes an endless belt (cleaning belt) and intermittent feeding means. The endless belt contacts the surface of the draft roller and cleans the surface of the draft roller. The intermittent feeding means includes a plurality of rotating shafts (belt guide rollers) that guide (drive) the endless belt.

JP 2006-83475 A

  It is not realistic to remove all fluff generated during drafting and cleaning. Accordingly, it is difficult to avoid the occurrence of the fluff around the belt guide roller of the cleaning device. Patent Document 1 does not disclose a detailed configuration of the belt guide roller.

  If the fluff is wound around the belt guide roller and the fluff gets inside the belt guide roller, a resistance is generated between the roller body of the belt guide roller and the roller shaft, causing the belt guide roller to malfunction. There is. As a result, the cleaning belt stops and the surface of the cleaning belt is worn.

  A main object of the present invention is to provide a cleaning device that can prevent a rotation failure even when fluff is wound around a belt guide roller.

Means and effects for solving the problems

  According to the first aspect of the present invention, the belt guide roller includes a roller body, a roller shaft of the roller body, and a shaft mounting portion. The roller body contacts a cleaning belt for cleaning the draft roller and guides the cleaning belt. The shaft attachment portion is attached so as to cover at least a part of the outer surface of the roller shaft. A concave portion that is recessed in the axial direction of the roller shaft is formed in one of the roller main body and the shaft mounting portion, and the other of the roller main body and the shaft mounting portion enters the concave portion.

  Thereby, since one of the roller main body and the shaft mounting portion is in the other, the boundary between the roller main body and the shaft mounting portion exists in the recess. Therefore, even if the fluff is wound around the belt guide roller, the fluff can be prevented from entering between the roller body and the shaft mounting portion. Therefore, the rotation failure of the cleaning belt can be prevented.

  The belt guide roller preferably has the following configuration. That is, the roller body is formed with a recess having a circular cross section perpendicular to the axial direction. The shaft mounting portion has a first end located near the roller body, and a second end located opposite to the first end, and the first end is the roller A roller contact portion that enters the recess of the main body is provided, and a cross section perpendicular to the axial direction of the roller contact portion is circular.

  By forming the recess on the roller body side, the size of the shaft mounting portion can be suppressed. Moreover, the operation | work which connects a shaft attaching part to a roller main body can be simplified by making a recessed part and a roller contact part circular.

  In the belt guide roller, the shaft mounting portion is formed so that the outer diameter of the roller contact portion is larger than the outer diameter of the portion located at the end in the axial direction from the roller contact portion. It is preferable that

  Thereby, since the boundary between the shaft mounting portion and the roller body is located further inside the recess, it is possible to more reliably prevent the fluff from entering the inside.

  In the belt guide roller, it is preferable that the shaft mounting portion supports the roller shaft so as to be relatively rotatable.

  Thereby, since rotation of a roller main body is not transmitted to a shaft attaching part, possibility that a fluff will wind around a shaft attaching part can be reduced.

  The belt guide roller preferably includes a cover portion that is attached to the second end portion of the shaft attachment portion and attached to cover the second end portion.

  Thereby, even if it is a case where there exists a convex part etc. in the 2nd end part of a shaft attaching part, it can prevent that a fiber wraps around this convex part etc.

  In the belt guide roller, the cover portion is preferably an elastic member.

  Thereby, a cover part can be attached, without using a volt | bolt and a tool.

  The belt guide roller preferably has the following configuration. That is, the belt guide roller includes a retaining portion that is attached to the second end portion of the shaft attachment portion in the axial direction and prevents the shaft attachment portion from coming off from the roller body. The cover portion is attached so as to cover the retaining portion.

  Thereby, it can prevent that a fluff contacts and gets entangled with a retaining part.

  According to a second aspect of the present invention, there is provided a cleaning device comprising the belt guide roller and a cleaning belt guided by the belt guide roller.

  Thereby, it is possible to realize a cleaning device in which a rotation failure of the cleaning belt hardly occurs.

  The cleaning device preferably has the following configuration. That is, the cleaning device includes a support portion that supports the shaft mounting portion. The shaft attachment portion includes a support portion contact portion that is a portion with which the support portion comes into contact. In the support portion contact portion, a cross-sectional shape perpendicular to the axial direction of a portion in contact with the support portion is linearly formed.

  Thereby, compared with the case where a support part contact part has a circular cross section, rotation of a shaft attachment part can be prevented reliably. In addition, the shaft mounting portion can be stably supported.

  According to a third aspect of the present invention, there is provided a draft device comprising the cleaning device and a plurality of draft roller pairs. Each of the plurality of draft roller pairs includes a top roller and a bottom roller. The cleaning belt is provided in contact with the plurality of top rollers. In the draft device, the top roller located second from the downstream side in the draft direction is provided with a feed cam portion, and the belt guide roller is intermittently driven by the feed cam portion.

  Accordingly, by intermittently driving the belt guide roller, the driving of the cleaning belt can be stopped except when necessary, and a large relative speed difference can be given to the outer peripheral surface of the top roller as a cleaning target. . As a result, a better cleaning effect can be obtained.

  According to a fourth aspect of the present invention, there is provided a spinning machine comprising the draft device, an air spinning device, and a winding device. The pneumatic spinning device twists the fiber bundle drafted by the draft device with an air flow to generate a spun yarn. The winding device winds the spun yarn supplied from the pneumatic spinning device into a package.

  Thereby, it is possible to realize a spinning machine in which the rotation failure of the cleaning belt hardly occurs.

1 is a front view showing an overall configuration of a spinning machine according to an embodiment of the present invention. The side view of a spinning unit. The perspective view of a cleaning apparatus. The exploded perspective view of a 1st roller, and the perspective view which shows the shape of the 1st axial end part side of a roller main body. Sectional drawing of a 1st roller. The schematic diagram which shows a mode that a 1st roller is supported, and the schematic cross section which shows the shape of a support part contact part. Sectional drawing of the conventional belt guide roller.

  Next, a spinning machine (spinning machine) according to an embodiment of the present invention will be described with reference to the drawings. A spinning machine 1 shown in FIG. 1 includes a large number of spinning units 2 arranged in parallel, a yarn splicing carriage 3, a prime mover box 4, a blower box 95, and a machine base control device 90.

  The machine control device 90 is for centrally managing each component provided in the spinning machine 1 and includes a monitor 91 and an input key 92. When the operator performs an appropriate operation using the input keys 92, the settings and / or states of the specific spinning unit 2 or all spinning units 2 can be displayed on the monitor 91.

  As shown in FIG. 2, each spinning unit 2 includes a draft device 7, an air spinning device 9, a yarn storage device 14, and a winding device 70, which are arranged in order from upstream to downstream. Yes. In the present specification, “upstream” and “downstream” mean upstream and downstream in the traveling (conveying) direction of the sliver 6, the fiber bundle 8, and the spun yarn 10 during spinning. Each spinning unit 2 produces a spun yarn 10 by spinning the fiber bundle 8 sent from the draft device 7 by the air spinning device 9, and winds the spun yarn 10 by the take-up device 70 to form a package 45. To do.

  The draft device 7 is provided in the vicinity of the upper end of the casing 5 of the spinning machine 1. The draft device 7 drafts (stretches a fiber bundle) the sliver 6 supplied from a sliver case (not shown) through a sliver guide 20 until a predetermined thickness is reached. The fiber bundle 8 drafted by the draft device 7 is supplied to the air spinning device 9. Details of the draft device 7 will be described later.

  The air spinning device 9 twists the fiber bundle 8 supplied from the draft device 7 to generate a spun yarn 10. In the present embodiment, a pneumatic spinning device that twists the fiber bundle 8 using a swirling airflow is employed. Specifically, the pneumatic spinning device 9 includes a fiber guide portion, a swirl flow generation nozzle, and a hollow guide shaft body, although detailed description and illustration are omitted. The fiber guide unit guides the fiber bundle 8 sent from the draft device 7 to a spinning chamber formed inside the pneumatic spinning device 9. The swirl flow generating nozzle is disposed around the path of the fiber bundle 8 and generates a swirl flow in the spinning chamber. By this swirl flow, the fiber ends of the fiber bundles 8 in the spinning chamber are reversed and swirled. The hollow guide shaft body guides the spun yarn 10 from the spinning chamber to the outside of the pneumatic spinning device 9.

  A yarn quality measuring device 12 and a spinning sensor 13 are provided downstream of the pneumatic spinning device 9. The spun yarn 10 spun by the air spinning device 9 passes through a yarn quality measuring device 12 and a spinning sensor 13.

  The yarn quality measuring device 12 monitors the thickness of the traveling spun yarn 10 using an optical sensor (not shown). The yarn quality measuring device 12 transmits a yarn defect detection signal to a unit controller (not shown) when a yarn defect of the spun yarn 10 (a portion where the thickness of the spun yarn 10 is abnormal) is detected. The yarn quality measuring device 12 is not limited to an optical sensor, and may be configured to monitor the thickness of the spun yarn 10 with a capacitance sensor, for example. Further, the yarn quality measuring device 12 may detect foreign matter contained in the spun yarn 10 as a yarn defect.

  The spinning sensor 13 is arranged immediately downstream of the yarn quality measuring device 12. The spinning sensor 13 can detect the tension of the spun yarn 10 between the pneumatic spinning device 9 and the yarn accumulating device 14. The spinning sensor 13 transmits the detected tension to the unit controller. The unit controller detects an abnormal portion such as a weak yarn by monitoring the tension detected by the spinning sensor 13.

  A yarn accumulating device 14 is provided downstream of the yarn quality measuring device 12 and the spinning sensor 13. As shown in FIG. 2, the yarn storage device 14 includes a yarn storage roller 15 and a motor 16 that rotationally drives the yarn storage roller 15.

  The yarn accumulating roller 15 can temporarily store a certain amount of spun yarn 10 around its outer peripheral surface. When the spun yarn 10 is wound around the outer circumferential surface of the yarn accumulating roller 15, the yarn accumulating roller 15 is rotated at a predetermined rotation speed, whereby the spun yarn 10 is pulled out from the air spinning device 9 at a predetermined speed and is moved downstream. Can be transported. Moreover, since the spun yarn 10 can be temporarily stored on the outer peripheral surface of the yarn storage roller 15, the yarn storage device 14 can function as a kind of buffer. As a result, the problem that the spinning speed in the pneumatic spinning device 9 and the winding speed (speed of the spun yarn 10 wound on the package 45) do not match for some reason (for example, slack of the spun yarn 10) is eliminated. Can do.

  A yarn guide 17 and a winding device 70 are disposed downstream of the yarn storage device 14. The winding device 70 includes a cradle arm 71 supported so as to be swingable around a support shaft 73. The cradle arm 71 can rotatably support a bobbin 48 for winding the spun yarn 10.

  The winding device 70 includes a winding drum (contact roller) 72 and a traverse device 75. The winding device 70 includes a winding drum drive motor (not shown). The winding drum 72 rotates while being in contact with the outer peripheral surface of the bobbin 48 or the package 45 when the driving force of the winding drum drive motor is transmitted. The traverse device 75 includes a traverse guide 76 that can be engaged with the spun yarn 10. The take-up device 70 drives the take-up drum 72 by a take-up drum drive motor while reciprocating the traverse guide 76 by a drive means (not shown). Accordingly, the winding device 70 rotates the package 45 that contacts the winding drum 72 and winds the spun yarn 10 around the package 45 while traversing the spun yarn 10.

  As illustrated in FIGS. 1 and 2, the yarn joining cart 3 includes a yarn joining device 43, a suction pipe 44, and a suction mouth 46. When yarn breakage or yarn cut occurs in a spinning unit 2, the yarn joining cart 3 travels on the rail 41 to the spinning unit 2 and stops. The suction pipe 44 sucks and captures the spun yarn 10 delivered from the pneumatic spinning device 9 and guides it to the yarn splicing device 43 while rotating in the vertical direction about the axis. The suction mouse 46 sucks and captures the spun yarn 10 from the package 45 and guides it to the yarn splicing device 43 while rotating in the vertical direction around the axis. The yarn joining device 43 performs yarn joining between the guided spun yarns 10.

  Next, the draft device 7 will be described in detail with reference to FIG. First, the draft roller included in the draft device 7 will be described.

  As shown in FIG. 2, the draft device 7 includes a cylindrical sliver guide 20 for introducing the fiber bundle 8, and includes a plurality of draft roller pairs including a bottom roller and a top roller facing each other. The bottom roller is located on the back side (lower side) of the spinning machine 1, and the top roller is located on the front side (upper side) of the spinning machine 1. The draft device 7 of this embodiment is configured as a so-called four-wire draft device including a back roller pair, a third roller pair, a middle roller pair, and a front roller pair in order from the upstream side.

  Specifically, the plurality of top rollers are a back top roller 21, a third top roller 22, a middle top roller 24 provided with an apron belt 23, and a front top roller 25 in this order from the upstream side. The plurality of bottom rollers are a back bottom roller 26, a third bottom roller 27, a middle bottom roller 28 provided with an apron belt 23, and a front bottom roller 29 in order from the upstream side.

  Each of the top rollers 21, 22, 25 is a roller having an outer peripheral surface made of an elastic member such as rubber. Each top roller 21, 22, 24, 25 is supported through an unillustrated bearing or the like so as to be rotatable about its axis. Each of the bottom rollers 26, 27, 28, and 29 is a metal roller and is configured to be driven to rotate about its axis.

  The draft device 7 has urging means (not shown) for urging each of the top rollers 21, 22, 24, 25 toward the bottom rollers 26, 27, 28, 29 opposed thereto. As a result, the outer peripheral surfaces of the top rollers 21, 22, 24, and 25 are in elastic contact with the outer peripheral surfaces of the bottom rollers 26, 27, 28, and 29, respectively. With this configuration, when the bottom rollers 26, 27, 28, and 29 are rotationally driven, the top rollers 21, 22, 24, and 25 that are in contact with the bottom rollers are also rotated. The draft device 7 includes a draft cradle (not shown) that rotatably supports the top rollers 21, 22, 24, and 25.

  The draft device 7 nips (pinches) the fiber bundle 8 between the rotating top rollers 21, 22, 24, 25 and the bottom rollers 26, 27, 28, 29, thereby directing the fiber bundle 8 toward the downstream side. Transport. The draft device 7 is configured such that the rotational speed of the downstream draft roller pair increases. Accordingly, the fiber bundle 8 is stretched (drafted) while being conveyed between the draft roller pair and the draft roller pair, and accordingly, the thickness of the fiber bundle 8 becomes thinner toward the downstream side.

  By appropriately setting the rotation speeds of the bottom rollers 26, 27, 28, and 29, the degree to which the fiber bundle 8 is drafted can be changed. Therefore, the fiber bundle 8 drafted to have a desired thickness can be supplied to the air spinning device 9. Accordingly, the spun yarn 10 having a desired count (thickness) can be spun in the pneumatic spinning device 9.

  Next, the cleaning device 60 will be described with reference to FIG. A cleaning device 60 for cleaning the draft roller is provided above the draft device 7. The cleaning device 60 includes a frame 61, which is fixed to a side surface of a draft cradle (not shown).

  A first roller 67 and a second roller 68 as belt guide rollers are rotatably supported on the frame 61. An urging lever 62 is rotatably attached to the frame 61. A tension roller 69 is rotatably supported at the tip of the urging lever 62.

  An endless cleaning belt (endless belt) 74 is wound around the first roller 67, the second roller 68, and the tension roller 69. As shown in FIG. 2, the cleaning belt 74 is disposed such that its outer peripheral surface (cleaning surface) is in contact with the outer peripheral surfaces of the top rollers 21 and 22 and the apron belt 23. A biasing spring (not shown) is attached to the biasing lever 62. The urging spring urges the urging lever 62 in a direction in which tension is applied to the cleaning belt 74.

  With the above configuration, the top rollers 21 and 22 and the apron belt 23 rotate with their outer peripheral surfaces in contact with the cleaning belt 74. Thereby, the deposits on the outer peripheral surfaces of the top rollers 21 and 22 and the apron belt 23 can be cleaned by the cleaning belt 74.

  The first roller 67 is disposed in the vicinity of the middle top roller 24. A gear portion 35 b having several gear teeth is fixed to the first roller 67. A boss portion 64 protrudes from one end of the middle top roller 24 in the axial direction, and a rotation protrusion (feed cam portion, rotation engagement portion) 65 protrudes from the boss portion 64. The rotation protrusion 65 is formed to face the radial direction. The distal end of the rotation protrusion 65 is configured to be engageable with the gear portion 35b.

  The rotation protrusion 65 rotates together with the middle top roller 24, and engages with the gear portion 35b every rotation to rotate the gear portion 35b by one tooth. As a result, the first roller 67 is rotated and the cleaning belt 74 is fed by an appropriate amount.

  As a result, each time the middle top roller 24 makes one rotation, the fresh cleaning surface of the cleaning belt 74 comes into contact with the top rollers 21 and 22 and the apron belt 23, and the cleaning effect of the cleaning belt 74 can be enhanced. . In addition, by the intermittent feeding, the driving of the cleaning belt 74 is stopped except when necessary, and a large relative speed difference is given to the outer peripheral surfaces of the top rollers 21 and 22 and the apron belt 23 to be cleaned. Can do. As a result, a better cleaning effect can be obtained.

  Next, the first roller 67 and the second roller 68 that guide the cleaning belt 74 will be described with reference to FIGS. The second roller 68 has substantially the same configuration as that of the first roller 67 except that the second roller 68 does not include the gear portion 35b. Therefore, the first roller 67 will be described below as a representative. As shown in FIG. 4, the first roller 67 includes a roller body 30, a roller shaft 50, two shaft mounting portions 81, two E rings (prevention portions) 83, two cover portions 85, Is provided. The shaft mounting portion 81, the E-ring 83, and the cover portion 85 are almost the same in shape and have the same function, and will be described collectively.

  The roller body 30 is a member that drives (guides) the cleaning belt 74 in contact with the cleaning belt 74. The roller body 30 includes a belt contact portion 32, a central base portion 33, a first end base portion 34, and a second end portion base portion 35. The center base portion 33, the first end portion base portion 34, and the second end portion base portion 35 are made of resin and are integrated.

  The center base part 33 is a part located in the center of a longitudinal direction (axial direction). The central base portion 33 is a cylindrical member, and the belt contact portion 32 is attached to the outside thereof.

  The belt contact portion 32 is a rubber cylindrical member and is a portion that contacts the cleaning belt 74. A plurality of rectangular parallelepiped protrusions for preventing the cleaning belt 74 from slipping are provided on the surface of the belt contact portion 32. Note that this protrusion can be omitted to more reliably prevent the wind surface from adhering to the belt contact portion 32.

  The first end base portion 34 is a portion located at one end portion in the longitudinal direction (axial direction) of the roller body 30. A concave portion 34 a for attaching the shaft attachment portion 81 is formed at an outer end portion (the end portion on the one side) of the first end portion base portion 34. The recess 34a is recessed inward in the axial direction, and has a circular cross section cut in the axial direction.

  The second end base portion 35 is a portion located at the other end portion in the longitudinal direction (axial direction) of the roller body 30. The second end base portion 35 is formed with a recess 35a and the gear portion 35b. The recess 35a is formed at the outer end of the second end base portion 35 in the axial direction (the end on the other side), and is a portion for attaching the shaft attachment portion 81. The recess 35a is recessed inward in the axial direction and has a circular cross section cut in the axial direction.

  The roller shaft 50 is a metal member that is disposed inside the roller body 30 and rotates integrally with the roller body 30. As illustrated in FIG. 5, the roller shaft 50 includes a shaft center portion 51, a first shaft end portion 52, and a second shaft end portion 53.

  The shaft center portion 51 is located at the center in the axial direction of the roller shaft 50 and is located inside the roller body 30. The outer diameter of the shaft central portion 51 is larger than the outer diameter of the first shaft end portion 52 and the outer diameter of the second shaft end portion 53. Further, shaft attachment portions 81 are attached to the outer surfaces of the first shaft end portion 52 and the second shaft end portion 53, respectively.

  The shaft attachment portion 81 is a substantially cylindrical member made of resin. Hereinafter, the end portion of the shaft mounting portion 81 located near the roller body 30 and the vicinity thereof may be referred to as a first end portion, and the opposite end portion and the vicinity thereof may be referred to as a second end portion (see FIG. 4). A through hole 81a is formed in the shaft attachment portion 81, and the first shaft end portion 52 (second shaft end portion 53) is inserted into the through hole 81a. The shaft attachment portion 81 includes a roller contact portion 81b, a support portion contact portion 81c, and a cover portion attachment portion 81d.

  The roller contact portion 81 b is a portion located at the inner end (first end) in the axial direction of the shaft attachment portion 81. The roller contact portion 81 b is a portion attached to the concave portion 34 a of the first end base portion 34 of the roller body 30. The roller contact portion 81b has a disc shape (circular cross section cut in the axial direction). The roller contact portion 81b is attached to the first end base portion 34 so as to be relatively rotatable. Therefore, even when the roller main body 30 and the roller shaft 50 are rotating, the shaft mounting portion 81 does not rotate. Thereby, it is possible to prevent the fluff around the shaft mounting portion 81.

  The outer diameter of the roller contact portion 81b is larger than the outer diameter of the outer portion of the shaft mounting portion 81 (the portion of the shaft mounting portion 81 located on the side opposite to the roller body 30). As a result, the boundary between the first end base portion 34 of the roller body 30 and the shaft mounting portion 81 is located inside the first end base portion 34, so the shaft mounting portion 81 and the first end base It becomes difficult for the fluff to enter between the portions 34.

  The support part contact part 81c is a part supported by the support part 77 which supports the 1st roller 67, as shown to Fig.6 (a). As shown in FIG. 6B, the support portion contact portion 81c has a shape in which a circle is cut out (a part of the circle is linear) in a cross-sectional view cut perpendicular to the axial direction. Specifically, the support portion contact portion 81c is configured such that only one surface that contacts the support portion 77 and the other surface are linear. Thereby, while being able to hold | maintain the shaft attaching part 81 stably, it can prevent more reliably that the shaft attaching part 81 rotates.

  The cover portion attachment portion 81d is a portion located at the outer end portion (second end portion) of the shaft attachment portion 81 in the axial direction. The outer diameter of the cover portion attachment portion 81d is larger than the outer diameter of a part of the shaft attachment portion 81 (portion close to the roller main body 30) located immediately inside the cover portion attachment portion 81d in the axial direction. The cover part 85 is attached to the cover part attaching part 81d. The cover portion 85 is made of rubber and can be elastically deformed. Therefore, the cover part 85 can be attached to the cover part attaching part 81d only by opening the cover part 85 and covering the cover part attaching part 81d.

  E-rings 83 are attached to both ends of the roller shaft 50, respectively. The E-ring 83 is a member for preventing the shaft attachment portion 81 from being detached from the roller shaft 50. The cover portion 85 covers the first shaft end portion 52 (second shaft end portion 53), the shaft attachment portion 81, and the E ring 83 together. Thereby, it is possible to prevent the fluff from being caught on the above portion.

  Next, with reference to FIG.5 and FIG.7, the subject in the past and the difference of a structure of this embodiment and the conventional product are demonstrated.

  The conventional belt guide roller 100 includes a roller main body 101, a roller shaft 102, a shaft mounting portion 103, and an E ring 104. The boundary between the end portion 101 a of the roller body 101 and the shaft mounting portion 103 is exposed to the outside of the belt guide roller 100. For this reason, when the fluff is wound, the fluff easily enters the inside. As a result, a resistance is generated between the roller body 101 and the roller shaft 102, and the belt guide roller 100 may be poorly rotated. Moreover, since the E-ring 104 is exposed, the E-ring 104 may become entangled.

  On the other hand, in the first roller (belt guide roller) 67 of this embodiment, the boundary between the end portion 101 a of the roller body 101 and the shaft mounting portion 81 is located inside the roller body 101. For this reason, even if the cotton wool is wound, it is difficult for the cotton wool to enter the inside. As a result, the rotation failure of the first roller 67 hardly occurs. Further, since the E ring 83 is covered with the cover portion 85, it is possible to prevent the cotton ring from being tangled with the E ring 83.

  As described above, the first roller 67 of this embodiment includes the roller main body 30, the roller shaft 50 of the roller main body 30, and the shaft attachment portion 81. The roller body 30 contacts the cleaning belt 74 that cleans the draft roller and guides the cleaning belt 74. The shaft attachment portion 81 is attached so as to cover at least a part of the outer surface of the roller shaft 50. The roller body 30 is formed with recesses 34 a and 35 a that are recessed in the axial direction of the roller shaft 50. The shaft attachment portion 81 enters each of the recesses 34a and 35a.

  Since the shaft mounting portion 81 has entered the roller main body 30, the boundary between the shaft mounting portion 81 and the roller main body 30 exists inside the recess 34a. Accordingly, even if the fluff is wound around the first roller 67, it is possible to make it difficult for the fluff to enter between the roller body 30 and the shaft mounting portion 81. Therefore, the rotation failure of the cleaning belt 74 can be prevented.

  In the first roller 67 of the present embodiment, the roller body 30 is formed with recesses 34a and 35a having a circular cross section perpendicular to the axial direction. The shaft attachment portion 81 includes a roller contact portion 81b that enters the recess of the roller body 30 at the end (first end) on the roller body 30 side, and a cross section perpendicular to the axial direction of the roller contact portion 81b is provided. It is circular.

  Thereby, the operation | work which connects the axis | shaft attaching part 81 to the roller main body 30 can be simplified by making recessed part 34a, 35a and the roller contact part 81b circular.

  The cleaning device 60 of this embodiment includes a support portion 77 that supports the shaft attachment portion 81. The shaft attachment portion 81 includes a support portion contact portion 81c that is a portion with which the second end portion contacts the support portion 77. In the cross-sectional shape perpendicular to the axial direction of the support portion contact portion 81c, the portion in contact with the support portion contact portion 81c is linear.

  Thereby, compared with the case where the cross section of the support part contact part 81c is circular, rotation of the shaft attachment part 81 can be prevented reliably. Further, the shaft mounting portion 81 can be stably supported.

  The preferred embodiment of the present invention has been described above, but the above configuration can be modified as follows, for example.

  In the above embodiment, the shaft attachment portion 81 is inserted into the recesses 34 a and 35 a formed in the roller body 30. However, the roller main body 30 may be configured to enter the recess formed in the shaft attachment portion 81.

  In the said embodiment, the roller contact part 81b and the recessed parts 34a and 35a of the shaft attaching part 81 are not restricted circularly, It can change suitably. In addition, when the shaft attachment part 81 rotates integrally with the roller main body 30, the roller contact part 81b and the recessed parts 34a and 35a need to be circular.

  The E-ring 83 of the above embodiment can be changed to a retaining ring such as a snap ring.

  The arrangement of the top roller and the bottom roller of the draft device 7 described above is an example. You may change suitably the positional relationship of a top roller and a bottom roller, or the number of draft roller pairs. Therefore, the top roller may be disposed on the lower side, and a cleaning device may be provided for the top roller.

  The material and shape of each member constituting the cleaning device 60 are arbitrary and can be appropriately changed.

DESCRIPTION OF SYMBOLS 1 Spinning machine 7 Draft device 9 Spinning device 30 Roller body 33 Central base part 34 First end base part 34a Recess 35 Second end base part 35a Recess 35b Gear part 50 Roller shaft 60 Cleaning device 67 First roller (belt guide roller)
68 Second roller (belt guide roller)
70 Winding device 81 Shaft mounting part 83 E-ring (prevention part)
85 Cover part

Claims (11)

A roller body for guiding the cleaning belt in contact with a cleaning belt for cleaning the draft roller;
A roller shaft of the roller body;
A shaft attachment portion attached so as to cover at least a part of the outer surface of the roller shaft;
With
One of the roller body and the shaft mounting portion is formed with a recess recessed in the axial direction of the roller shaft, and the other of the roller body and the shaft mounting portion enters the recess. Belt guide roller to do. The belt guide roller according to claim 1,
The roller body is formed with a recess having a circular cross section perpendicular to the axial direction,
The shaft mounting portion has a first end located near the roller body, and a second end located opposite to the first end, and the first end is the roller A belt guide roller comprising a roller contact portion that enters a recess of a main body, and a cross section perpendicular to the axial direction of the roller contact portion is circular. The belt guide roller according to claim 2,
The shaft mounting portion is formed such that an outer diameter of the roller contact portion is larger than an outer diameter of a portion located at an end portion in the axial direction from the roller contact portion. Belt guide roller. The belt guide roller according to claim 2 or 3,
The shaft mounting portion supports the roller shaft so as to be relatively rotatable. The belt guide roller according to claim 4,
A belt guide roller comprising: a cover portion attached to the second end portion of the shaft attachment portion and attached to cover the second end portion. The belt guide roller according to claim 5,
The belt guide roller, wherein the cover portion is an elastic member. The belt guide roller according to claim 5 or 6,
A retaining portion that is attached to the second end portion of the shaft attaching portion in the axial direction and prevents the shaft attaching portion from coming off from the roller body;
The belt guide roller, wherein the cover portion is attached so as to cover the retaining portion. The belt guide roller according to any one of claims 1 to 7,
A cleaning belt guided by the belt guide roller;
A cleaning device comprising: The cleaning device according to claim 8,
A support portion for supporting the shaft mounting portion;
The shaft mounting portion includes a support portion contact portion that is a portion with which the support portion contacts,
The cleaning device according to claim 1, wherein a cross-sectional shape perpendicular to the axial direction of a portion in contact with the support portion is formed in a straight line. A cleaning device according to claim 8 or 9,
Multiple draft roller pairs,
With
Each of the plurality of draft roller pairs is composed of a top roller and a bottom roller,
The cleaning belt is provided in contact with the plurality of top rollers,
The top roller located second from the downstream side in the draft direction is provided with a feed cam portion, and the belt guide roller is intermittently driven by the feed cam portion. A draft device according to claim 10;
An air spinning device for producing a spun yarn by twisting a fiber bundle drafted by the draft device with an air flow;
A winding device for winding the spun yarn supplied from the pneumatic spinning device into a package;
A spinning machine characterized by comprising:

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