• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a strap tensioning device for a drawing device of a spinning machine, comprising a rod (25), a lever (18) pivotally supported by the rod (25), a part of tensioning application (19) which is arranged at the distal end of the lever (18) and configured to apply the tension to a lower lug (15), and a torsion spring (26) arranged on the shank (25). ). The lower strap (15) is wound on a central lower roll (13), a strap guide member, and the tension application portion (19). The lever (18) is pushed by the torsion spring (26) in a direction in which the tension is applied to the lower strap (15). A positioning engagement portion which positions the lever (18) relative to the longitudinal direction of the shank (25) is arranged at the boundary between the shank (25) and the twist spring (26) or the limit between the rod (25) and the lever (18).
    公开号:CH712023B1
    申请号:CH00172/17
    申请日:2017-02-14
    公开日:2017-11-30
    发明作者:Hayashi Hisaaki；Mitsutsuka Naoyuki
    申请人:Toyota Jidoshokki Kk；
    IPC主号:
    专利说明:

    Description
    BACKGROUND OF THE INVENTION [0001] The present invention relates to a strap tensioning device for a drawing device of a spinning machine, and more particularly to a strap tensioning device for a lower strap.
    In a ring spinning machine, a wick provided from a wick spool is drawn by a drawing device and dispensed by a front cylinder. As such a drawing device, there is known a drawing device comprising a strap tensioning device. The strap tensioner applies the tension to a lower strap wound on a central lower cylinder, which is a component of the draw device. See, for example, Japanese Patent Laid-Open Publication JP 2001 207 344.
    The strap tensioning device comprises a strap tensioning lever having a tension applying portion, which applies tension to the lower strap, in a distal end section of the strap tensioning device. Hereinafter, the strap tension lever is simply referred to as a lever. While receiving the correct tension of the lever, the bottom strap wraps around the lower cylinder through the tension application portion. A rod is inserted through a proximal end of the lever. A coil spring is mounted on and engaged with the rod. The coil spring pushes the lever in the direction in which the tension is applied to the bottom strap.
    In the strap tension device, the rod is typically attached to a cylinder support. Six or eight levers are pivotally supported by the rod and spaced at regular intervals. The six or eight levers configure one unit. Conventionally, there is no positioning mechanism for each lever relative to the rod or the machine. Typically, such positioning is done visually or using a longitudinal gauge by the operator. Positioning is performed to ensure alignment in the relative longitudinal positions of the lower lanyard and a linear section (a groove in the drawing roll surface) of the lower central roll or an upper liner.
    It is particularly difficult for the operator to quickly position each lever with sufficient accuracy by visual verification and sensations or using a longitudinal gauge. This can cause a misalignment in the relative longitudinal positions of each lever or lower strap and linear section of the lower cylinder. Also, the misalignment may occur in the relative longitudinal positions of each lever or lower strap and an upper portion such as the upper strap. SUMMARY OF THE INVENTION [0006] Accordingly, an object of the present invention is to provide a strap tensioning device for a spinning device of a spinning machine capable of arranging a lever and a torsion coil spring, which are components of the strap tensioning device, in a state positioned in the correct positions without position adjustment by the operator.
    To achieve the foregoing objective and according to one aspect of the present invention, a strap tensioning device for a drawing device of a spinning machine is provided which comprises a rod, a lever pivotally supported by the rod, a voltage application portion which is arranged at a distal end of the lever and configured to apply the tension to a lower strap, and a torsion coil spring arranged on the rod. The lower strap is wound on a central lower cylinder, a strap guide member and the tension application portion. The lever is pushed by the helical torsion spring in a direction in which the tension is applied to the lower strap. A positioning engagement portion that is configured to position the lever relative to a longitudinal direction of the shaft is arranged at a boundary between the shaft and the torsion coil spring or a boundary between the shaft and the lever.
    Other aspects and advantages of the present invention will emerge more clearly from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the invention.
    Brief Description of the Drawings [0009] The invention, together with its objects and advantages, will be better understood by reference to the following description of the presently preferred embodiments together with the accompanying drawings, in which: FIG. 1A is a partial sectional view of a drawing device; fig. 1B is a schematic partial perspective view of a strap tensioning device; fig. 2A is a partially omitted diagram illustrating a state in which helical torsion levers and springs corresponding to a unit are attached to a rod; fig. 2B is a partial plan view showing the relation among the rod, a lever and the corresponding torsion coil spring; fig. 3A is a partial perspective view of the rod; fig. 3B is an enlarged front view of the helical torsion spring; fig. 3C is a partial front view of the rod; fig. 4 is an enlarged partial sectional view schematically illustrating the relationship between the rod and the torsion coil spring; fig. 5A is a schematic view of an end section of a rod according to another embodiment; fig. 5B is a partial schematic of a rod and a section of a helical torsion spring according to another embodiment; figs. 6A to 6D are partial diagrams schematically illustrating a rod according to another embodiment; fig. 7A is a partially sectional diagram schematically illustrating the relationship among a rod, a rod, and a helical torsion spring according to another embodiment; fig. 7B is a partially omitted sectional view taken on line B-B of FIG. 7A; fig. 7C is a partial sectional view of a lever according to another embodiment; and FIG. 8 is a partial diagram schematically illustrating a rod according to another embodiment.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0010] A strap tensioning device for a spinning device of a spinning machine according to an embodiment of the present invention will now be described with reference to FIGS. 1A to 4.
    As illustrated in FIG. 1A, a drawing device 11 has a three-cylinder configuration comprising lower front rollers 12, lower central rollers 13, and rear lower rollers 14. A lower strap 15 is wound on a lower tensioning device 16 serving as the web guiding member, a tension applying portion 19 of a lever 18, which is a component of a tensioning device 17, and the lower central cylinder 13.
    An upper front cylinder 21, a central upper cylinder 22, and a rear upper cylinder 23 are supported by a load arm 20 through an upper cylinder support member 24 in positions corresponding to the lower front cylinder. 12, the lower central cylinder 13, and the lower lower cylinder 14, respectively. An upper liner 22a is wound on the central upper cylinder 22. Each of the cylinders 21 to 23 forms a pair which is supported by a single spindle.
    The tensioning device 17 comprises a rod 25 and a lever 18 in rearward and downward positions of a rear lower cylinder 14. The rod 25 is arranged parallel to the rear lower cylinder 14. The lever 18 is pivotally supported by the shank 25 at the proximal end of the lever 18. The lever 18 includes the tension application portion 19, which applies the tension to the lower lug 15 at the distal end. lever 18. Referring to FIG. 1B, the lever 18 is urged by a helical torsion spring 26 in the direction in which the tension is applied to the lower strap 15 (counterclockwise, as seen in Fig. 1A).
    As shown in FIG. 2A, in a strap tensioning device 30, a plurality of tensioning devices 17 are arranged and spaced at regular intervals. The rod 25 is of such a length that the rod 25 can support the levers 18 corresponding to one unit, which are typically six or eight levers 18, in positions spaced at regular intervals. Each of the levers 18 is configured by a channel-shaped proximal end section 18a, through which the rod 25 is inserted, and an arm portion 18b extending from one end of the proximal end section. 18a. The voltage application portion 19 is arranged at the distal end of the arm portion 18b. In communication with each of the levers 18, a helical torsion spring 26 is arranged in a state in which the rod 25 is inserted through the helical torsion spring 26. Referring to FIG. 2B, each of the coil springs 26 is supported by the rod 25 in a manner that provides clearance with respect to the proximal end section 18a of the corresponding lever of the levers 18.
    As illustrated in FIG. 3A, the rod 25 has a groove 25a which extends in the longitudinal direction and along the entire length of the rod 25. Referring to FIG. 3B, each coil spring 26 includes a mounting portion 26a, which is mounted on the rod 25. The mounting portion 26a has a smaller outer diameter than the other sections of the coil spring 26 so that the mounting portion 26a is wound tightened around the shank 25 relative to the other sections of the coil spring 26. The torsion spring 26 has a stop portion (a claw portion) 26b, which is engaged with the groove 25a of the shank 25 to limit the circumferential movement of the torsion spring 26, in an end section of the mounting portion 26a. The coil spring 26 has a contact portion 26c, which is in contact with the lever 18, in the end section of the coil spring 26 on the side opposite the mounting portion 26a.
    With reference to FIGS. 3A and 3C, the shank 25 has grooves 28, each of which is a recess serving as a positioning engagement portion, in the outer circumferential surface. The grooves 28 extend in the circumferential direction of the rod 25 in a state spaced at regular intervals. In this embodiment, each groove 28 extends substantially along the entire circumference of the shank 25 (except for the section corresponding to the groove 25a).
    As shown in FIG. 4, the groove 28 is engaged with the mounting portion 26a of the coil springs 26 at opposite side surfaces 28a, thereby positioning the coil spring 26 at a predetermined position in the longitudinal direction of the rod 25. This is that is, in this embodiment, the mounting portions 26a and the grooves 28 configure a positioning engagement portion. Also, the groove 28 limits the separation of the mounting portion 26a from the groove 28 due to vibration of the spinning machine in operation. The groove 28 has a depth such that, when the force is applied by the operator to move the coil spring 26 in the longitudinal direction of the rod 25, the mounting portion 26a is allowed to easily separate from the groove 28.
    The operation of the strap tension device 30, which is configured as described above, is described hereinafter.
    When the load arm 20 is arranged in a pressurized position (a spinning position), in which the load arm 20 compresses the upper rollers 21 to 23 against the corresponding lower rolls 12 to 13, the thong upper 22a comes into contact with the lower strap 15.
    When the lower central cylinder 13 rotates, the lower strap 15 pivots. Then, the contact pressure between the upper strap 22a and the lower strap 15 rotates the upper strap 22a synchronously with the lower strap 15. The upper strap 22a thus cooperates with the lower strap 15 for transporting a bundle of fibers.
    The lower lanyard 15 rotates in a wound state on the lower tension device 16 the tension application portion 19 of the lever 18 and the lower central cylinder 13. The lower lanyard 15 rotates in a state in which the lever 18 is pushed by the helical tension spring 26 in the direction in which the tension is applied to the lower strap 15 and a correct level of tension is applied to the lower strap 15.
    The grooves 28, each of which configures a positioning engagement portion, are provided in the shaft 25 and spaced at regular intervals in the longitudinal direction of the shaft 25. Each torsional coil spring 26 is arranged in a a state in which a section of the mounting portion 26a is received in the corresponding groove 28 for positioning the torsion spring 26 in the longitudinal direction. Each lever 18 is pivotally supported by the rod 25 in a state in which the lever 18 is positioned by the corresponding helical spring 26 in the longitudinal direction. The depth of each groove 28 is determined so that the force required to separate the mounting portion 26a from the groove 28 exceeds the force acting on the mounting portion 26a due to vibration of the spinning machine in operation. Therefore, each lever 18, which guides the corresponding lower lug 15 through the tension application portion 19, is maintained in a correct position even when the loom is in operation. This allows the lower lug 15 to rotate to a state in which the correct tension is applied to the lower lug 15 and in a proper state which limits the misalignment in the relative longitudinal positions of the lower lug 15 and a linear section. of the lower central cylinder 13 and the misalignment in the relative longitudinal positions of the lower strap 15 and an upper portion such as the upper strap 22a.
    The levers 18 are supported, pivotally, by the rod 25 in a state spaced by regular intervals in the longitudinal direction. To replace a certain component such as the bottom lug 15, the lever 18 must be removed from the shank 25 and then re-attached, or rearranged, to the predetermined position. The strap tensioning device 30 is fixed to the machine in a predetermined position in a state in which the tension devices 17 corresponding to one unit are mounted on the shaft 25. The operator must therefore fix the tensioning devices. 17 corresponding to a unit at the rod 25 in predetermined positions spaced at regular intervals. At this time, the operator must arrange the levers 18, each of which is in a stopped state by the corresponding helical spring 26, in the predetermined positions by inserting the rod 25 through the levers 18, as well as the coil springs 26 .
    With the abutment portion 26b of the coil spring 26 engaged with the groove 25a, which extends in the longitudinal direction of the rod 25, the operator inserts the rod 25 through the lever 18 and the coil spring. 26 and then moves the lever 18 and the torsion spring 26 along the rod 25. As the lever 18 and the torsion spring 26 are moved, the mounting portion 26a of the coil spring 26 is switched to a state engaged with the groove 28, which extends in the circumferential direction of the rod 25. The coil spring 26 is thus arranged in the predetermined position. When the coil spring 26 is in the predetermined position, the coil spring 26 is received in the space within the proximal end section 18a, which is channel shaped. The lever 18 is therefore also arranged in the predetermined position. The predetermined number of tensioning devices 17 must be assembled to the shaft 25. Therefore, unless the currently manipulated tensioning device 17 is the last one, the operator applies the force necessary to separate the mounting portion 26a from the groove 28 in a continuous manner moves the lever 18 and the torsion spring 26 along the rod 25 continuously. By repeating such an operation, the tensioning device 17 is arranged in a state positioned in the corresponding predetermined position. Finally, the voltage devices 17 corresponding to one unit are arranged sequentially in a state in which the voltage devices 17 are positioned in the corresponding predetermined positions.
    Unlike conventional techniques, when the operator simply moves the lever 18 and the helical torsion spring 26 along the rod 25 without performing the position adjustment of the lever 18 and the torsional coil spring 26 with respect to the longitudinal direction of the rod 25, the mounting portion 26a is engaged with the groove 28 and the lever 18 and the torsion spring 26 is arranged in the predetermined position while being moved. The force required to separate the mounting portion 26a from the grooves 28 in the state in which the mounting portion 26a is engaged with the groove 28 and positioned in the longitudinal direction of the rod 25 must be greater than the force acting on the helical torsion spring 26 due to the vibration of the spinning machine in operation. This allows the operator to easily separate each mounting portion 26a from any of the grooves 28.
    The present embodiment obtains the following advantages.
    (1) In the strap tensioning device 30, the levers 18 are pivotally supported by the rod 25. Each lever 18 includes the tension application portion 19, which applies the tension to the lower strap 15 at the distal end of the lever 18. The lower strap 15 is wound on the lower central cylinder 13, the strap guide member (the lower tensioning device 16), and the tension application portion 19 The lever 18 is pushed by the helical torsion spring 26 in the direction in which the tension is applied to the corresponding lower strap 15. The positioning engagement portions (each mounting portion 26a and the corresponding groove 28), which position the corresponding lever 18 relative to the longitudinal direction of the rod 25, are arranged at the boundary between the rod 25 and the spring. helical torsion 26.
    The levers 18 are pivotally supported by the rod 25 and spaced at regular intervals in the longitudinal direction. To replace a component such as the lower straps 15, the levers 18 must be removed from the rod 25 and then remixed in the predetermined positions. Each recess (each groove 28) configuring one of the positioning engaging portions, which positions the corresponding lever 18 relative to the longitudinal direction of the rod 25 at the time of component replacement, is arranged at the boundary between the rod 25 and the torsion spring 26 corresponding torsion. Therefore, by moving the lever 18 and the torsion spring 26 along the rod 25, the lever 18 and the torsion spring 26 are allowed to be supported in a state positioned in correct positions without the adjustment of position by the operator. For this reason, the levers 18 and torsion coil springs 26, which are components of the strap tension device 30, are arranged in a state positioned in the corresponding correct positions without position adjustment by the operator.
    (2) The positioning engagement portions comprise the recesses (the grooves 28), which are arranged in the outer circumferential surface of the rod 25 so that the mounting portions 26a of the torsion coil springs 26 may be engaged with the recesses. Generally, since each twist coil spring 26 includes a mounting portion 26a that can be pressed against the shank 25, the twist spring 26 and the lever 18 are attached to the shank 25 by means of the mounting portion 26a. in a state in which the helical torsion spring 26 and the lever 18 are positioned. Also, manufacture is simplified in this configuration with respect to the case where the recesses configuring the positioning engagement portions are replaced by projections.
    [0030] (3) The recesses are the grooves 28, each of which extends into the outer circumferential surface of the rod 25 in a circumferential direction. In this configuration, simply by moving each helical torsion spring 26 in the longitudinal direction of the rod 25, the mounting portion 26a is switched into a state engaged with the corresponding groove 28 and thus positioned.
    (4) Each groove 28 extends substantially along the entire circumference of the rod 25. The groove 28 does not necessarily need to extend substantially along the entire circumference of the rod 25. However, the grooves 28 extending along the entire circumference of the shank 25 are favorable to facilitate the holding of the mounting portions 26a each in an engaged state.
    The present invention is not limited to the embodiment described above, but may, for example, be implemented in the following manner.
    The positioning engagement portions, which position the levers 18 relative to the longitudinal direction of the rod 25, do not necessarily need to include grooves 28, each of which extends substantially along any the circumference of the shank 25 in the outer circumferential surface of the shank 25. For example, a plurality of grooves which intermittently extend on an imaginary circumferential line in a predetermined position in the longitudinal direction of the shank 25 may be provided. Alternatively, a single groove which has a length less than the entire circumference may be provided.
    As shown in FIG. 5A, a recess 31, with which the abutment portion 26b of the corresponding torsion coil spring 26 can be engaged, can be arranged in a side surface of the groove 25a, which extends along the entire length of the In this case, each abutment portion 26b and the corresponding recess 31 define positioning engagement portions that position the corresponding lever 18 relative to the longitudinal direction of the rod 25.
    With reference to FIG. 5B, each helical torsion spring 26 may have a linear portion 32 in a section of the mounting portion 26a. Holes 33, each of which is a recess serving as a positioning engagement portion, may be provided in the outer circumferential surface of the shank 25. A lower surface 33a of the recess 33 may be a flat surface in contact with the linear portion. 32. That is, the linear portion 32 is in contact with the lower surface 33a of the recess 33 in a manner that is in linear contact. In other words, a section of the mounting portion 26a of the torsion spring 26 is substantially D-shaped and the sections of the shank 25 corresponding to the recesses 33 are each formed to have substantially a cross-sectional shape. D. This facilitates engagement between the mounting portions 26a and the recesses 33, with respect to a case in which each mounting portion 26a has an arcuate shape. In this case, the linear portions 32 and recesses 33 function as a stop portion which limits the circumferential movement of the corresponding torsion coil spring 26, a positioning engagement portion which positions the corresponding lever 18 relative to the direction of movement. longitudinally of the shank 25, and a positioning engagement portion which positions the lever 18 relative to a circumferential direction of the shank 25. Therefore, the abutment portions 26b of the coil springs 26 and the groove 25a, which extends along the entire longitudinal length of the rod 25, may be omitted.
    As illustrated in FIG. 6A, two protrusions 34 may be arranged as positioning engaging portions in a side surface of the groove 25a, which is provided along the entire length of the rod 25, and spaced at such intervals, that the abutment portion 26b of the torsion spring 26 is clamped between the projections 34. Alternatively, a single projection 34 may be provided. However, the arrangement of two protrusions 34 is favorable for limiting the displacement of the corresponding helical spring 26 in any position in the longitudinal direction of the rod 25.
    [0037] Referring to FIG. 6B, a projection 35 serving as a positioning engagement portion may be provided on the outer circumferential surface of the shaft 25 to extend in a circumferential direction. The protrusion 35 may extend substantially along the entire circumferential length or be divided into several sections.
    [0038] Referring to FIG. 6C, a recess 36 which is a recess serving as a positioning engagement portion, may be arranged in the outer circumferential surface of the shaft 25. Alternatively, with reference to FIG. 6D, a projection (a protuberance) 37 serving as a positioning engagement portion may be provided on the outer circumferential surface of the shaft 25. A plurality of depressions 36 and projections 37 may be arranged in a circumferential direction.
    Each of the positioning engagement portions that position the levers 18 relative to the longitudinal direction of the rod 25 may be arranged not at the boundary between the rod 25 and a corresponding spring of the torsion coil springs 26. but at the limit between the rod 25 and a lever corresponding levers 18. For example, as shown in Figs. 7A and 7B, a groove 28, which extends in a circumferential direction, can be arranged in a predetermined position in an outer surface of the rod 25 and a pin 40 can be arranged in the proximal end section 18a of the lever 18 corresponding. The distal end of the pin 40 projects into a hole 38, through which the rod 25 is inserted. The pin 40 is biased by a spring 39 in the protruding direction and can be engaged with the groove 28. The groove 28 and the pin 40 each configure a positioning engagement portion. The arrangement of the positioning engagement portions at the boundary between the shank 25 and each lever 18 ensures precise positioning, relative to the arrangement of the positioning engagement portions at the boundary between the shank 25 and each helical torsion spring 26.
    [0040] Referring to FIG. 7C, a leaf spring 41, instead of the pin 40, may be provided as a positioning engagement part which positions the corresponding lever 18 with respect to the longitudinal direction of the rod 25, in a state in which a section of the leaf spring 41 protrudes into the hole 38.
    As a positioning engaging part, an elastomer such as plastic or rubber may be arranged on the inner surface of the hole 38 of each lever 18.
    Referring to FIG. 8, recesses 42 may be provided in the longitudinal direction of the rod 25 and spaced by a regular interval. The recesses 42 each perform the positioning by being engaged with the corresponding abutment portion 26b, which is arranged on the opposite side to the contact portion 26c stopping the coil spring 26 relative to the corresponding lever 18. Each recess 42 corresponds to a positioning engagement portion. The coil springs 26 do not necessarily need to understand the mounting portions 26a. However, each helical spring 26 is configured so that the rod 25 is inserted through the coil spring 26 in a state in which the distal end of the abutment portion 26b, which is engaged with the corresponding recess 42, is pressed against and pushed toward the circumferential surface of the shank 25. In this case, the abutment portions 26b and the recesses 42 function as a positioning engagement portion that positions the lever 18 relative to the longitudinal direction of the shank. rod 25 and a positioning engagement portion which positions the lever 18 relative to a circumferential direction of the shaft 25. The groove 25a which extends along the entire longitudinal length of the rod 25, therefore becomes unnecessary.
    权利要求:
    Claims (5)
    [1]
    The present invention can be used not only on a ring spinning machine but also on any other spinning machine having a drawing device, such as a beam spinning machine. claims
    A strap tensioning device (30) for a drawing device (11) of a spinning machine, comprising: - a rod (25); - a lever (18) pivotally supported by the rod (25); a voltage application portion (19) which is arranged at a distal end of the lever (18) and configured to apply the voltage to a lower strap (15); and - a helical coil spring (26) arranged on the rod (25), wherein: the lower strap (15) is wound on a central lower cylinder (13), a strap guide member, and the portion of application (19), the lever (18) is urged by the torsion spring (26) in a direction in which the tension is applied to the lower strap (15), and a positioning engagement portion which is configured to position the lever (18) relative to a longitudinal direction of the rod (25) is arranged at a boundary between the rod (25) and the torsion spring (26) or a limit between the rod (25) and the lever (18).
    [2]
    The strap tensioning device (30) according to claim 1, wherein the torsion coil spring (26) has a mounting portion which is mounted on the rod (25), and the positioning engagement portion is a recess arranged in an outer circumferential surface of the shank (25) so that a section of the torsion coil spring mounting portion (26) is received in the recess.
    [3]
    The strap tensioning device (30) according to claim 2, wherein the recess is a groove (28) which is arranged in the outer circumferential surface of the rod (25) and extends in a circumferential direction.
    [4]
    A strap tensioning device (30) according to claim 2, wherein the recess is a recess (33) arranged in the outer circumferential surface of the shaft (25), the mounting portion has a linear portion in a section of the mounting part, and a lower surface of the recess (33) in the rod is a flat surface which is in contact with the linear part.
    [5]
    The strap tensioning device (30) according to claim 1, wherein the positioning engagement portion is arranged in the lever (18) in a state in which the positioning engagement portion compresses the rod ( 25).
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    同族专利:
    公开号 | 公开日
    CN107099890B|2022-01-21|
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    CH712023A2|2017-08-31|
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    引用文献:
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    CN2813647Y|2005-08-13|2006-09-06|许恒坤|Metal plate part sliding bar type spinning apron-tensioning support|
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    CN201172714Y|2008-02-04|2008-12-31|河北太行机械工业有限公司|Medium and lower roller assembly for drafting device for spinning machine|
    CN101718016A|2008-10-09|2010-06-02|秦锡沧|Rotary lower leather apron tension bracket device of ring spinning machine|
    CN203007520U|2012-12-28|2013-06-19|新疆溢达纺织有限公司|Spinning machine back area leather collar drafting device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2016029861A|JP6409795B2|2016-02-19|2016-02-19|Apron tension device in drafting machine of spinning machine|
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