JP2011032618A - Cleaning device for draft roller, draft machine, and textile machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning device for a draft roller in which a pad body is provided to be made into contact with or to be moved away from the draft roller and pressing force of the pad body against the draft roller is maintained constant. <P>SOLUTION: The cleaning device 61 for a front bottom roller 28 includes a pad supporting lever 70, a fixed member 90, a first torsion spring, and a pressing lever 31. The pad supporting lever 70 supports a pad body 62. The pad supporting lever 70 is mounted on the fixed member 90 in a manner that the pad supporting lever can be rotated. The first torsion spring is mounted on the fixed member 90 and applies force to rotate the pad supporting lever 70 in a direction in which the pad body 62 is made into contact with an outer peripheral surface of the front bottom roller 28. By moving away from the front bottom roller 28, the pressing lever 31 applies force to rotate the pad supporting lever 70 in a direction in which the pad body 62 moves away from the outer peripheral surface of the front bottom roller 28. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cleaning device that removes cotton sugar and the like adhering to a draft roller for drafting a fiber bundle to clean the fiber bundle.

  2. Description of the Related Art Conventionally, in a textile machine such as a spinning machine, a configuration including a cleaning device for cleaning a peripheral surface of a draft roller by bringing a pad body into contact with the peripheral surface of the draft roller is known. In such a cleaning device, when a yarn breakage occurs during the spinning operation, the pad body is automatically moved from the outer peripheral surface of the draft roller as the spinning nozzle for spinning the yarn retracts from the fixed position. Some are configured to be separated from each other. Patent Document 1 discloses a cleaning device of this type.

  Patent Document 1 discloses a cleaning device configured as follows. That is, the cleaning device includes a pad body provided so as to be in contact with the outer peripheral surface of the draft roller, and a suction collector provided to face the outer peripheral surface of the draft roller. The width of the pad body is configured to be not less than ½ of the average fiber length of the drafted fiber and not more than the width of the suction port of the suction collector. Further, the cleaning device includes a pad support member made of an elastic body that supports the pad body. The pad support member is integrally formed with a pad support portion to which the pad body is attached, a fixing portion fixed to the fixing member, and a driven portion that is pushed to separate the pad body from the draft roller. Configured. The pad body is pressed against the outer peripheral surface of the draft roller by the restoring force of the pad support member that is elastically deformed.

JP 2009-68126 A

  However, the configuration in which the pad body is pressed against the draft roller by using the elastic force of the pad support member itself, which is an elastic body, changes the force that presses the pad body against the draft roller because the pad support member is easily plastically deformed. There was a thing. If the force that presses the pad body against the draft roller changes, the pad body may resonate with the rotation of the draft roller, and it may cause an adverse effect on the yarn physical properties. In this respect, even in the configuration of Patent Document 1, since a plate-like member is used as an elastic member, there is room for improvement from the viewpoint of preventing a change in pressing force caused by plastic deformation.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a draft roller capable of maintaining the pressing force to the draft roller by the pad body constant while the pad body is configured to be able to contact and separate from the draft roller. It is to provide a cleaning device.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to a first aspect of the present invention, there is provided a draft roller cleaning device configured as follows. That is, the draft roller cleaning device includes a pad support member, a fixing member, a torsion spring, and a lever member. The pad support member supports the pad body. The pad support member is rotatably attached to the fixing member. The torsion spring is attached to the fixing member and applies a force for rotating the pad support member in a direction in which the pad body is brought into contact with the outer peripheral surface of the draft roller. By moving the lever member away from the draft roller, it is possible to apply a force for rotating the pad support member in a direction in which the pad body is separated from the outer peripheral surface of the draft roller.

  As a result, the pad body is pressed against the draft roller using the force of the torsion spring that is difficult to be plastically deformed, so that the pressing force of the pad body against the draft roller can be kept constant for a long period of time. Accordingly, since the force pressing the pad body against the draft roller is stabilized, resonance of the pad body can be prevented, and the feed of the draft roller can be stabilized. Further, it is possible to realize a simple mechanism capable of separating the pad body from the draft roller in conjunction with the operation of the lever member moving away from the draft roller.

  The draft roller cleaning device is preferably configured as follows. That is, the draft roller cleaning device includes a transmission member and a second torsion spring. The transmission member includes a contact portion that can contact the pad support member and a driven portion that can contact the lever member, and is configured to be rotatable with respect to the fixed member. The second torsion spring has one end connected to the transmission member and the other end connected to the pad support member. The second torsion spring applies a spring force so that the contact portion is pressed against the pad support member. The lever member moves away from the draft roller, thereby contacting the driven portion and rotating the transmission member. As the transmission member rotates, the pad support member rotates, and the pad body is separated from the outer peripheral surface of the draft roller.

  As a result, even when a force in the direction of separating the pad body from the draft roller acts on the transmission member in a state where the movement of the pad support member is restricted due to contact with another member or the like, the force is exerted by the second torsion spring. Can be absorbed. Further, even if a force that overcomes the spring force of the second torsion spring is further applied from this state, the contact portion only moves away from the pad support member. As described above, even when the lever member moves largely in a state where the movement of the pad support member is restricted, an excessive force is not directly applied to the pad support member. Therefore, it is possible to effectively prevent the pad support member from being damaged due to the movement of the lever member.

  In the draft roller cleaning device, the fixing member preferably has a plurality of positions to which the torsion spring can be attached.

  Thereby, the pressing force of the pad body acting on the draft roller can be adjusted only by changing the position where the torsion spring is attached.

  The draft roller cleaning device preferably includes a regulating member that regulates rotation of the pad support member in a direction in which the pad body is separated from the draft roller.

  Thereby, even when a lever member moves largely, it can prevent that a pad support member rotates too much. In addition, when the pad body is attached to the pad support member, the position of the pad support member can be fixed by bringing the pad support member into contact with the regulating member, so that the attachment work can be easily performed.

  According to a second aspect of the present invention, there is provided a draft device provided with the draft roller cleaning device.

  According to the 3rd viewpoint of this invention, a spinning machine provided with the said draft apparatus is provided.

  Thereby, the fall of the physical property of the thread | yarn caused by the resonance of a pad body can be suppressed, and the quality of the spun yarn can be improved.

  The spinning machine is preferably configured as follows. That is, the spinning machine includes an apron belt roller, an apron belt position changing member, an attachment member, and a fixing member support portion. An apron belt is wound around the apron belt roller. The apron belt position changing member is traversed to traverse the apron belt. The apron belt position changing member is attached to the attachment member. The fixing member support portion is configured separately from the attachment member in order to attach the fixing member.

  Thereby, when the apron belt is traversed, local wear of the apron belt caused by the traveling of the yarn can be prevented. In addition, since the apron belt position changing member is attached to the mounting member which is a member different from the fixing member supporting portion to which the fixing member is attached, vibrations caused by the traverse driving of the apron belt position changing member are caused by the pad body. Can be effectively suppressed.

1 is a front view showing an overall configuration of a spinning machine according to an embodiment of the present invention. The side view which shows the mode of a draft apparatus. The enlarged side view which shows the structure of a cleaning apparatus. The expansion perspective view which shows the structure of a cleaning apparatus. The enlarged perspective view which shows the principal part of the pad support mechanism of a cleaning apparatus. The expanded side view which shows the mode of the cleaning apparatus when a pad body leaves | separates from the front bottom roller. The enlarged side view which shows the mode of a pad support mechanism when a transmission lever leaves | separates from a pad support lever.

  Next, an embodiment of the invention will be described. FIG. 1 shows a spinning machine 1 as a textile machine having a large number of spinning units (yarn processing units) 2 arranged side by side.

  As shown in FIG. 1, each spinning unit 2 includes a draft device 7, a spinning device 9, a yarn storage device 11, and a winding device 12 as main components.

  The draft device 7 is provided in the vicinity of the upper end of the frame 6 of the spinning machine 1, and the fiber bundle 8 sent from the draft device 7 is spun by the spinning device 9. The spun yarn 10 discharged from the spinning device 9 is sent to the yarn accumulating device 11 after passing through a clearer 52 for detecting a yarn defect and performing yarn cutting to remove the yarn defect portion. After passing through the yarn storage device 11, the spun yarn 10 is wound up by the winding device 12 to form a package 45.

  The spinning machine 1 includes a blower box 80 and a prime mover box 81. Further, the spinning machine 1 includes a yarn splicing cart 3 provided so as to be able to travel in the direction in which the spinning units 2 are arranged. As shown in FIG. 1, the yarn splicing cart 3 of this embodiment includes a splicer (yarn splicing device) 43, a suction pipe 44, and a suction mouth 46. When yarn breakage or yarn breakage occurs in a spinning unit 2, the yarn splicing carriage 3 travels on the rail 41 fixed to the frame 6 to the spinning unit 2 and stops at that position. The yarn splicing carriage 3 captures the yarn end on the spinning device 9 side with the suction pipe 44 and also captures the yarn end on the winding device 12 side with the suction mouth 46, and rotates the suction pipe 44 and the suction mouth 46, respectively. By doing so, the captured yarn end on the spinning device 9 side and the yarn end on the winding device 12 side are guided to the splicer 43. The yarn end on the spinning device 9 side guided by the splicer 43 and the yarn end on the winding device 12 side are spliced by the splicer 43. As a result, the yarn end on the spinning device 9 side and the yarn end on the winding device 12 side are connected, and the winding operation can be resumed.

  The spinning machine 1 is provided with a doffing cart (not shown in the drawings) for doffing a full package, and the doffing cart is configured to be able to run independently of the yarn joining cart. ing.

  FIG. 2 is an enlarged side view of the draft device 7, the spinning device 9, and the yarn storage device 11. As shown in FIG. 2, the draft device 7 includes a plurality of draft rollers for drawing the sliver 13 into the fiber bundle 8. The draft roller is composed of a top roller and a bottom roller that are arranged to face each other.

  The top roller is composed of four draft rollers: a back roller 14, a third roller 15, a middle roller 16 on which a top apron belt 17 is mounted, and a front roller 18. On the other hand, the bottom roller is composed of four draft rollers: a back bottom roller 24, a third bottom roller 25, a middle bottom roller (apron belt roller) 26 on which a bottom apron belt 27 is mounted, and a front bottom roller 28. . Each of the bottom rollers 24, 25, 26, and 28 is disposed to face the top rollers 14, 15, 16, and 18.

  Further, the draft device 7 of the present embodiment includes a cleaning device 61 for removing cotton sugar and the like attached to the front bottom roller 28. The detailed configuration of the cleaning device 61 will be described later.

  With the above configuration, the sliver 13 sent to the draft device 7 is drawn by the draft roller to become a fiber bundle 8 and sent to the spinning device 9. The spinning device 9 performs air spinning on the fiber bundle 8 sent from the draft device 7. The air-spun fiber bundle 8 becomes a spun yarn 10 and is sent to the yarn storage device 11.

  The yarn storage device 11 has a function of giving a predetermined tension to the spun yarn 10 and pulling it out from the spun device 9, and the spun yarn 10 sent from the spun device 9 is retained at the time of yarn splicing by the yarn splicing carriage 3, for example. It has a function of preventing slack, and a function of adjusting the tension so that fluctuations in tension on the winding device 12 side are not transmitted to the spinning device 9 side. As shown in FIG. 2, the yarn storage device 11 includes a yarn storage roller 21, a yarn hooking member 22, and an electric motor 23 as main components.

  The yarn hooking member 22 is configured to be able to engage (hang) with the spun yarn 10. The yarn hooking member 22 is supported so as to be relatively rotatable with respect to the yarn accumulating roller 21, and torque that resists the relative rotation of the yarn hooking member 22 with respect to the yarn accumulating roller 21 by appropriate biasing means. Is configured to occur. With this resistance torque, the yarn hooking member 22 rotates following the rotation of the yarn accumulating roller 21, and as a result, both can be rotated together. On the other hand, when a force that overcomes this resistance torque is applied to the yarn hooking member 22, the yarn hooking member 22 can rotate relative to the yarn accumulating roller 21.

  The yarn storage roller 21 is configured so that the spun yarn 10 can be wound around and stored on the outer peripheral surface thereof. The yarn accumulating roller 21 is rotationally driven by an electric motor 23. With the above configuration, when the yarn hooking member 22 with the yarn engaged is rotated integrally with the yarn accumulating roller 21, the spun yarn 10 is swung by the yarn accumulating member 22 and guided to the outer peripheral surface of the yarn accumulating roller 21. It is wrapped around. The spun yarn 10 wound around the yarn accumulating roller 21 is sent to the distal end side of the yarn accumulating roller 21 by the new spun yarn 10 that is sequentially wound around the proximal end side of the yarn accumulating roller 21. Then, the spun yarn 10 is pulled out from the front end side of the yarn accumulating roller 21, passes through the yarn hooking member 22, and then sent to the winding device 12.

  Next, the tension adjustment function of the yarn storage device 11 will be described. When a force for pulling the spun yarn 10 engaged with the yarn hooking member 22 downstream is applied in a state where the spun yarn 10 is wound around the yarn accumulating roller 21, the spun yarn 10 is pulled from the tip side of the yarn accumulating roller 21. A force for rotating the yarn hooking member 22 so as to be unwound is applied to the yarn hooking member 22. Therefore, if the yarn tension on the downstream side of the yarn accumulating device 11 (the yarn tension between the yarn accumulating device 11 and the winding device 12) is strong enough to overcome the resistance torque, the yarn hooking member 22 becomes independent of the yarn accumulating roller 21. The spun yarn 10 is gradually unwound from the front end side of the yarn accumulating roller 21 via the yarn hooking member 22.

  Conversely, when the yarn tension on the downstream side of the yarn accumulating device 11 is not so strong as to overcome the resistance torque, the yarn hooking member 22 rotates integrally with the yarn accumulating roller 21. In this case, the yarn hooking member 22 functions to prevent the spun yarn 10 from being unwound from the leading end side of the rotating yarn accumulating roller 21.

  In this way, the yarn storage device 11 operates to unwind the yarn when the downstream yarn tension increases and to stop the yarn unwinding when the yarn tension decreases (yarn seems to loosen). Thus, the slack of the yarn can be eliminated and an appropriate tension can be applied.

  Next, the cleaning device 61 provided in the draft device 7 for cleaning the front bottom roller 28 and the configuration in the vicinity thereof will be described with reference to FIGS. FIG. 3 is an enlarged side view showing the configuration of the cleaning device 61. FIG. 4 is an enlarged perspective view showing the configuration of the cleaning device 61. FIG. 5 is an enlarged perspective view showing a main part of the pad support mechanism 63 of the cleaning device 61.

  As shown in FIG. 3, the cleaning device 61 includes a pad body 62 configured to be able to contact the outer peripheral surface of the front bottom roller 28, a pad support mechanism 63 that supports the pad body 62, and a push lever (lever). Member) 31. The push lever 31 is for separating the pad body 62 from the front bottom roller 28.

  The pad body 62 is made of a soft resin, and is formed in a plate shape having a predetermined thickness as shown in FIG. The pad body 62 is formed in a substantially rectangular shape, and its corner is formed in a circular shape (smooth curved shape). Thus, since the pad body 62 is formed in a rounded rectangular shape and the corner portion is not sharp, it is possible to prevent the fiber from being caught and entangled with the corner portion.

  The pad support mechanism 63 is disposed slightly below the front bottom roller 28. 3 and 4, the pad support mechanism 63 includes a fixing member 90, a pad support lever (pad support member) 70, a transmission lever (transmission member) 71, and a first torsion spring (torsion spring) 94. And a second torsion spring (second torsion spring) 95.

  The fixing member 90 is fixed to a fixing frame (fixing member support portion) 67 supported by the frame 6 of the spinning machine 1. The fixing member 90 includes a main body 85 and a spring force adjusting unit 87. The main body 85 is fixed to the fixed frame 67 by an appropriate means such as a bolt and supports each part of the pad support mechanism 63. A pad support lever 70 and a transmission lever 71 are rotatably supported by the main body 85. The pad support lever 70 and the transmission lever 71 are supported by the main body 85 so that the center of rotation is in the left-right direction (the direction parallel to the axial direction of the front bottom roller 28).

  As shown in FIGS. 4 and 5, the spring force adjusting portion 87 is formed on one side of the main body 85 in the left-right direction and around the portion supporting the transmission lever 71. The spring force adjusting portion 87 has a plurality of hooking portions 87 a for attaching one end of the first torsion spring 94. The hook portions 87a are arranged in the circumferential direction around the portion of the fixing member 90 that supports the transmission lever 71 while forming an appropriate interval.

  The coil portion of the first torsion spring 94 is inserted into the rotation shaft portion of the transmission lever 71. Further, one end of the spring line of the first torsion spring 94 is fixed so as to be hooked on one of a plurality of hooking portions 87a, and the other end is rotatably supported by the main body 85. It is fixed on the side. The first torsion spring 94 applies a biasing force in a direction in which the pad body 62 approaches the front bottom roller 28 side to the pad support lever 70 via the transmission lever 71.

  In addition, since a plurality of the hooking portions 87a are formed in the spring force adjusting portion 87 of the present embodiment, the operator can appropriately select the position where the first torsion spring 94 is hooked. For example, the first torsion spring 94 may become loose due to long-term use, and the urging force may be weakened. Even in such a case, according to the configuration of the present embodiment, an appropriate biasing force is transmitted by changing the mounting position of one end of the first torsion spring 94 and increasing the elastic force of the first torsion spring 94. It can be applied to the lever 71. That is, the force acting on the transmission lever 71 (pad support lever 70) is increased by changing the mounting position of the first torsion spring 94 so as to increase the amount of elastic deformation of the spring as compared with the current state (during aging). It can be done. As a result, the pressing force of the pad body 62 against the front bottom roller 28 can be maintained with an appropriate force.

  As shown in FIG. 4 and the like, the transmission lever 71 includes a transmission lever side driven portion 97 that is pushed by the push lever 31 and a lever contact portion (contact portion) 96 that pushes the pad support lever 70. The transmission lever side driven portion 97 is formed as a tapered arm-like plate-like member protruding downward from the rotation center thereof. The lever contact portion 96 is formed as a plate-like member that protrudes from the end surface on one side of the transmission lever side driven portion 97 so as to bend toward the pad support lever 70 side. As the transmission lever 71 rotates, the tip of the lever contact portion 96 can contact and press the lower portion of the pad support lever 70 (pad-side driven portion 98).

  The pad support lever 70 includes a clip support portion 72, a clip 73, and a pad side driven portion 98. The clip support part 72 is for supporting the clip 73, and is formed in a substantially L shape in a side view of FIG. One end of the clip support portion 72 is connected to the base portion (rotation shaft portion) of the pad support lever 70, and a clip 73 is attached to the other end. The clip 73 is configured to be able to sandwich the pad body 62, and is fixed by being sandwiched between the distal ends of the clip support portions 72. The pad-side driven portion 98 is formed as an arm-shaped plate-like member that protrudes downward from the base portion of the pad support lever 70. As shown in FIGS. 3 and 4, during the spinning operation, the lever contact portion 96 (transmission lever 71) is in contact with the pad-side driven portion 98 (pad support lever 70).

  In addition, a restricting member 74 for preventing the pad support lever 70 from rotating too much is attached to the fixed frame 67 described above. The regulating member 74 is configured as a plate-like member and is fixed to the fixed frame 67.

  The coil portion of the second torsion spring 95 is inserted through the rotating shaft portion of the pad support lever 70. One end of the spring line of the second torsion spring 95 is fixed to the transmission lever 71 side, and the other end is fixed to the pad support lever 70 side. The transmission lever 71 and the pad support lever 70 are connected to each other by a second torsion spring 95, and the second torsion spring 95 is attached so that the lever contact portion 96 is pressed against the pad side driven portion 98. Power is acting.

  Further, the spinning machine 1 is provided with an elongated shaft (attachment member) 68 in the left-right direction. Each member such as a tensioner bar (not shown in the drawing) for generating tension on the bottom apron belt 27 is attached to the shaft 68. The shaft 68 is supported by the frame 6 of the spinning machine 1 independently of the fixed frame 67.

  As shown in FIGS. 4 and 5, an apron fork 99 as an apron belt position changing member is attached to the shaft 68 via a traverse frame 69. The apron fork 99 has two protrusions, and the apron fork 99 is fixed to the traverse frame 69 with the bottom apron belt 27 inserted between the two protrusions. The traverse frame 69 is configured to be movable in the longitudinal direction of the shaft 68 with respect to the shaft 68 and is connected to a traverse driving device (not shown).

  With this configuration, the apron fork 99 reciprocates left and right by driving the traverse driving device, and the bottom apron belt 27 can be traversed in a direction substantially parallel to the axial direction of the middle bottom roller 26. As a result, the contact location between the bottom-side apron belt 27 and the fiber bundle 8 is always changed, and local wear of the bottom-side apron belt 27 can be prevented and the service life can be extended.

  As shown in FIG. 3, the push lever 31 is fixed to a support arm 29 arranged on the downstream side of the draft device 7 (downstream in the transport direction of the fiber bundle 8). The support arm 29 is arranged so as to face substantially in the vertical direction, and the spinning device 9 is fixed to the upper portion thereof. Further, the support arm 29 is configured to be rotatable about a support shaft 30 disposed at the lower end thereof, and the push lever 31 moves as the support arm 29 rotates, so that the pad The contact between the body 62 and the front bottom roller 28 can be released. The details of this contact release operation will be described later.

  With the above configuration, the state during normal operation is shown in FIG. As shown in FIG. 3, during the spinning operation of the spinning machine 1, a plurality of draft rollers including the front bottom roller 28 are respectively driven to rotate, and the sliver 13 is stretched to be sent to the spinning device 9 as a fiber bundle 8. It has become. During this normal operation, the transmission lever 71 (lever contact portion 96) urged by the spring force of the first torsion spring 94 causes the pad support lever 70 (pads) so that the pad body 62 approaches the front bottom roller 28. The side driven part 98) is pushed. As a result, the pad support lever 70 rotates integrally with the transmission lever 71 to bring the pad body 62 attached to the clip support portion 72 into contact with the outer peripheral surface of the front bottom roller 28. In this state, the pad body 62 is in contact with the outer peripheral surface of the front bottom roller 28 at a substantially constant pressure, and the cotton sugar, the fluff and the dust that are generated from the sliver 13 and adhere to the front bottom roller 28. Such foreign matter is scraped off by the pad body 62.

  Next, with reference to FIG.6 and FIG.7, the operation | movement which cancels | releases the contact of the pad body 62 and the front bottom roller 28 is demonstrated. FIG. 6 is an enlarged side view showing a state of the cleaning device 61 when the pad body 62 is separated from the front bottom roller 28. FIG. 7 is an enlarged side view showing a state of the pad support mechanism 63 when the transmission lever 71 is separated from the pad support lever 70.

  When yarn breakage or the like occurs during operation of the spinning machine 1, spinning by the spinning device 9 is stopped, and drafting by the draft device 7 is also stopped. An actuator is connected to the support arm 29 of each spinning unit 2, and a control unit (not shown) controls the actuator of the corresponding spinning unit 2 to operate. As a result, the support arm 29 rotates about the support shaft 30 as shown in FIG. At this time, the push lever 31 moves integrally with the support arm 29 so as to be separated from the pad support mechanism 63.

  Eventually, the end of the push lever 31 comes into contact with the transmission lever side driven portion 97 and applies a pressing force to the transmission lever 71 via the transmission lever side driven portion 97. With this pressing force, the transmission lever 71 rotates in a direction against the spring force of the first torsion spring 94. The pad support lever 70 connected to the transmission lever 71 by the second torsion spring 95 rotates to follow the rotation of the transmission lever 71, and as a result, the pad body 62 is separated from the front bottom roller 28.

  As described above, the pad support lever 70 rotates in conjunction with the operation of the push lever 31. When the pad support lever 70 rotates by a predetermined angle, the upper end of the regulating member 74 contacts the pad support lever 70. And further rotation is prevented. Even if the transmission lever 71 is rotated in such a direction that the pad body 62 is further separated from the front bottom roller 28 from this state, the displacement of the transmission lever 71 is absorbed by the elastic deformation of the second torsion spring 95, and the pad support lever 70 does not rotate. That is, as shown in FIG. 7, the contact between the transmission lever 71 (lever contact portion 96) and the pad support lever 70 (pad side driven portion 98) is merely released.

  As described above, in the configuration of the present embodiment, even if the push lever 31 further moves after the pad support lever 70 comes into contact with the restriction member 74 and cannot rotate, the transmission lever 71 moves the pad support lever 70. Can be absorbed by rotating. Accordingly, it is possible to prevent the pad support lever 70 from being pressed against the regulating member 74 side with an excessive force, so that the push lever 31, the pad support lever 70, the transmission lever 71 and the like can be protected from damage.

  As described above, when the support arm 29 is rotated, the push lever 31 moves away from the front bottom roller 28, and the push lever 31 pushes the transmission lever 71 of the pad support mechanism 63. The pad body 62 operates so as to be separated from the front bottom roller 28. As a result of the movement of the support arm 29, the spinning device 9 moves to a position away from the front roller 18 and the front bottom roller 28. In this way, an appropriate space is formed between the front roller 18 and the front bottom roller 28 and the spinning device 9 by the mechanical operation of the pad support mechanism 63 and the support arm 29 interlocked with each other, and fiber removal or the like is performed. Maintenance work can be easily performed.

  By the way, the pad body 62 supported by the pad support mechanism 63 is configured to be detachable from the clip 73. When the pad body 62 is worn by rubbing against the outer peripheral surface of the front bottom roller 28, the pad body 62 is concerned. Need to be replaced with a new one. However, even if the pad body 62 is inserted into the clip 73 at the tip of the pad support lever 70, the soft resin pad body 62 is elastically deformed or the pad support lever 70 rotates in the direction in which the pad body 62 is inserted. May escape and reduce workability. In this regard, in the configuration of the present embodiment, an operator who attaches the pad body 62 can rotate the pad support lever 70 to a position where the pad support lever 70 comes into contact with the restriction member 74, and press and fix the pad support lever 70 from above. it can. In this state, the pad body 62 can be inserted into the clip 73 from above while the pad support lever 70 is received by the restricting member 74 so that the clip 73 does not escape downward, so that the operator can insert the pad body 62 into the clip 73. Easy to install.

  As described above, the draft device 7 of this embodiment includes the cleaning device 61 for cleaning the front bottom roller 28. The cleaning device 61 includes a pad support lever 70, a fixing member 90, a first torsion spring 94, and a push lever 31. The pad support lever 70 supports the pad body 62. A pad support lever 70 is rotatably attached to the fixing member 90. The first torsion spring 94 is attached to the fixing member 90 and applies a force for rotating the pad support lever 70 in a direction in which the pad body 62 is brought into contact with the outer peripheral surface of the front bottom roller 28. By moving the push lever 31 away from the front bottom roller 28, a force for rotating the pad support lever 70 in a direction in which the pad body 62 is separated from the outer peripheral surface of the front bottom roller 28 can be applied.

  Thereby, the pad body 62 is pressed against the front bottom roller 28 by using the force of the first torsion spring 94 which is difficult to be plastically deformed, so that the pressing force of the pad body 62 against the front bottom roller 28 can be kept constant for a long time. . Therefore, since the force pressing the pad body 62 against the front bottom roller 28 is stabilized, the resonance of the pad body 62 can be prevented and the feed of the front bottom roller 28 can be stabilized. Further, it is possible to realize a simple mechanism that can separate the pad body 62 from the front bottom roller 28 in conjunction with the movement of the push lever 31 away from the front bottom roller 28.

  In addition, the cleaning device 61 of the present embodiment is configured as follows. That is, the cleaning device 61 for the front bottom roller 28 includes a transmission lever 71 and a second torsion spring 95. The transmission lever 71 includes a lever contact portion 96 that can contact the pad support lever 70 and a transmission lever side driven portion 97 that can contact the push lever 31, and is configured to be rotatable with respect to the fixing member 90. The second torsion spring 95 has one end connected to the transmission lever 71 and the other end connected to the pad support lever 70. In addition, the second torsion spring 95 applies a spring force so that the lever contact portion 96 is pressed against the pad support lever 70. The push lever 31 moves away from the front bottom roller 28 to contact the transmission lever side driven portion 97 to rotate the transmission lever 71. As the transmission lever 71 rotates, the pad support lever 70 rotates and the pad body 62 is separated from the outer peripheral surface of the front bottom roller 28.

  As a result, the second torsion can be achieved even when a force in the direction of separating the pad body 62 from the front bottom roller 28 acts on the transmission lever 71 in a state where the movement of the pad support lever 70 is restricted due to contact with another member. The force can be absorbed by the spring 95. Further, even if a force that overcomes the spring force of the second torsion spring 95 is further applied from this state, the transmission lever 71 (lever contact portion 96) only moves away from the pad support lever 70. As described above, even when the push lever 31 moves greatly in a state where the movement of the pad support lever 70 is restricted, an excessive force is not directly applied to the pad support lever 70. Therefore, damage to the pad support lever 70 caused by the movement of the push lever 31 can be effectively prevented.

  Further, in the cleaning device 61 of the present embodiment, the fixing member 90 has a plurality of positions where the first torsion spring 94 can be attached.

  Thereby, the pressing force of the pad body 62 acting on the front bottom roller 28 can be adjusted only by changing the position where the first torsion spring 94 is attached.

  Further, the cleaning device 61 of the present embodiment includes a regulating member 74 that regulates the rotation of the pad support lever 70 in the direction in which the pad body 62 moves away from the front bottom roller 28.

  Thereby, even when the push lever 31 moves greatly, the pad support lever 70 can be prevented from rotating too much. Further, when the pad body 62 is attached to the pad support lever 70, the position of the pad support lever 70 can be fixed by bringing the pad support lever 70 into contact with the regulating member 74, so that the attachment work can be easily performed.

  Further, the spinning machine 1 according to the present embodiment includes the draft device 7.

  Thereby, the fall of the physical property of the thread | yarn caused by the resonance of the pad body 62 can be suppressed, and the quality of the spun yarn can be improved.

  Further, the spinning machine 1 of the present embodiment is configured as follows. That is, the spinning machine 1 includes a middle bottom roller 26, an apron fork 99, a shaft 68, and a fixed frame 67. A bottom apron belt 27 is wound around the middle bottom roller 26. The apron fork 99 is traversed to traverse the bottom apron belt 27. An apron fork 99 is attached to the shaft 68. The fixing frame 67 is configured separately from the shaft 68 for attaching the fixing member 90.

  Thereby, when the bottom apron belt 27 is traversed, local abrasion of the bottom apron belt 27 caused by running of the yarn can be prevented. In addition, since the apron fork 99 is attached to the shaft 68 which is a member different from the fixing frame 67 to which the fixing member 90 is attached, the vibration caused by the traverse driving of the apron fork 99 has an influence on the pad body 62. It can be effectively suppressed.

  Although the embodiment of the present invention has been described above, the above configuration can be further modified as follows.

  In the above-described embodiment, the urging force of the first torsion spring 94 is applied to the pad support lever 70 via the transmission lever 71, but this configuration can be changed as appropriate according to circumstances. For example, the cleaning device can be configured to apply a spring force directly to the pad support lever by a torsion spring. Even in this configuration, the urging means for pressing the pad body against the front bottom roller is composed of a torsion spring that is hard to be plastically deformed, so that the pressing force of the pad body against the front bottom roller is maintained within a certain range for a long time. can do. Moreover, according to this structure, simplification of a structure can also be implement | achieved. However, from the viewpoint of preventing the pad support lever 70 from being damaged, the configuration of the above embodiment including the transmission lever 71 and the second torsion spring 95 is preferable.

  The material of the pad body 62 may be, for example, rubber or non-woven fabric instead of soft resin.

  The cleaning device 61 is not limited to cleaning the front bottom roller 28 but can be employed as a configuration for cleaning other draft rollers.

  In addition to the configuration of the above-described embodiment, a suction collector for sucking and removing cotton sugar, fiber scraps, and the like attached to the pad body 62 may be arranged. For example, the suction collector may be attached to the support arm 29 so that the suction port of the suction collector faces the outer peripheral surface of the front bottom roller 28. In this case, the amount of fiber deposited on the pad body 62 can be reduced by removing the fiber by suction, and the maintenance labor can be reduced.

  The draft device 7 of the above embodiment can be applied not only to the spinning machine 1 but also to a textile machine such as a roving machine and a continuous spinning machine.

1 Spinning machine 7 Draft device 26 Middle bottom roller (apron belt roller)
27 Bottom apron belt (apron belt)
28 Front bottom roller (draft roller)
31 Push lever (lever member)
61 Cleaning device 62 Pad body 67 Fixed frame (fixing member support)
68 Shaft (Mounting member)
70 Pad support lever (pad support member)
71 Transmission lever (transmission member)
90 fixing member 94 first torsion spring (torsion spring)
95 Second torsion spring (second torsion spring)
96 Lever contact part (contact part)
97 Driven lever side driven part (driven part)
99 Apron fork (Apron belt position changing member)

Claims (7)

A pad support member for supporting the pad body;
A fixing member to which the pad support member is rotatably attached;
A torsion spring, which is attached to the fixing member, for applying a force to rotate the pad support member in a direction in which the pad body is brought into contact with an outer peripheral surface of a draft roller;
A lever member capable of applying a force to rotate the pad support member in a direction away from the outer peripheral surface of the draft roller by moving away from the draft roller;
A cleaning device for a draft roller, comprising: The draft roller cleaning device according to claim 1,
A transmission member configured to be rotatable with respect to the fixed member, and having a contact portion that can contact the pad support member and a driven portion that can contact the lever member;
A second torsion spring having one end connected to the transmission member and the other end connected to the pad support member;
With
The second torsion spring exerts a spring force so that the contact portion is pressed against the pad support member,
The lever member moves away from the draft roller to contact the driven portion to rotate the transmission member, and the pad support member rotates as the transmission member rotates, so that the pad A cleaning device for a draft roller, wherein the body is separated from the outer peripheral surface of the draft roller. A draft roller cleaning device according to claim 1 or 2,
The drafting roller cleaning device, wherein the fixing member has a plurality of positions to which the torsion spring can be attached. A draft roller cleaning device according to any one of claims 1 to 3,
A cleaning device for a draft roller, comprising: a regulating member that regulates rotation of the pad support member in a direction in which the pad body is separated from the draft roller.   A drafting device comprising the drafting roller cleaning device according to any one of claims 1 to 4.   A spinning machine comprising the draft device according to claim 5. The spinning machine according to claim 6, wherein
An apron belt roller around which an apron belt is wound;
An apron belt position changing member that is traverse-driven to traverse the apron belt;
An attachment member to which the apron belt position changing member is attached;
In order to attach the fixing member, a fixing member support portion configured separately from the attachment member;
A spinning machine characterized by comprising:

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