JP2008013860A - Yarn twister - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yarn twister capable of changing the twisting direction of the yarn in yarn-twisting devices. <P>SOLUTION: This yarn twister 1 has a yarn-twisting devices each equipped with a spindle, a rotor rotating integrally with the spindle and a spindle-driving motor 32 for rotationally driving the spindle, and a changeover switch 57 for changing over the twisting direction of the yarn on the yarn-twisting device, and is so constituted as capable of setting the yarn twisting directions of the yarns in a part of a plurality of yarn-twisting devices in reverse direction to the twisting direction of the yarns on the residual yarn-twisting devices. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a twisting machine for twisting yarns.

  Conventionally, various twisting machines for twisting yarns are known. For example, Patent Document 1 describes a twisting machine for industrial materials that manufactures tire cords and the like. This twisting machine includes a number of twisting units including a twisting device that twists two yarns fed from two types of yarn supply packages, respectively, and a plurality of twisted yarns can be simultaneously produced by these twisting units. Is possible.

  Each twisting device includes a spindle, a rotor that rotates integrally with the spindle, and a drive motor that rotationally drives the spindle. One of two types of yarn supply packages is supported on the spindle in a stationary state. Then, the two yarns fed from the two types of yarn feeding packages are rotated by rotating the yarn fed from the other yarn feeding package outside the one yarn feeding package by the rotor driven to rotate by the drive motor. It is comprised so that it may twist together.

JP 2005-48312 A

  By the way, in the twisting machine as described above, the rotational direction (forward or reverse) of the drive motor is usually the same in all twisting devices, and therefore the twisting direction (S twisting) in all these twisting devices. (Or Z twist) is the same. However, depending on the application of the twisted yarn, there are cases where both a large number of twisted yarns having the same twisting direction and a small amount of twisted yarn having a twisting direction opposite to each other are required. In this case, when producing a small amount of twisted yarn in which the twisting direction is reversed, only a part of the twisted yarn units among a large number of twisted yarn units are operated, resulting in a reduction in production efficiency.

  The objective of this invention is providing the twisting machine which can change the twist direction of the thread | yarn in a twisting apparatus.

Means for Solving the Problems and Effects of the Invention

  A twisting machine according to a first aspect of the present invention includes a spindle, a rotor that rotates integrally with the spindle, and a drive motor that rotates the spindle, and performs twisting processing on the yarn by the rotation of the rotor. And a twisting direction changing means for changing the twisting direction of the yarn in the twisting device by switching the rotational direction of the drive motor.

  According to this configuration, since the twisting direction of the yarn in the twisting device can be changed by the twisting direction changing means, it is possible to produce two types of twisted yarns in which the twisting directions are opposite to each other with one twisting device. It becomes.

  A twisting machine according to a second invention is the twisting machine according to the first invention, comprising a plurality of the twisting devices, wherein the twisting direction changing means is a twisting direction of a yarn in a part of the plurality of twisting devices, In the remaining twisting device, it is set in the direction opposite to the yarn twisting direction.

  According to this configuration, it is possible to simultaneously produce twisted yarns in which the twisting directions are opposite to each other in some twisting yarn devices and the remaining twisting device. Therefore, in most of the twisting devices, a twisted yarn having a certain twisting direction can be manufactured, and in the remaining part of the twisting device, a twisted yarn having a reverse twisting direction can be manufactured in a small amount. It is possible to produce different types of twisted yarn.

  A twisting machine according to a third aspect of the present invention is the first or second aspect of the invention, further comprising switching prohibiting means for prohibiting switching of the rotational direction of the driving motor by the twisting direction changing means during rotation of the driving motor. It is characterized by this. According to this configuration, the rotation direction of the drive motor is not switched during the rotation of the spindle, and damage to the drive motor can be prevented.

  Next, an embodiment of the present invention will be described. The twisting machine 1 of this embodiment is a twisting machine for industrial materials such as tire cords. FIG. 1 is a view of the twisting machine 1 of the present embodiment as seen from the longitudinal direction of the machine base 2. FIG. 2 is a partially enlarged view of FIG.

  As shown in FIG. 1, the twist unit 3 is arranged on each of the left and right sides of the machine base 2 in FIG. 1, and the twist unit 3 is arranged in the longitudinal direction of the machine base 2 (perpendicular to the plane of FIG. 1). Many are arranged (for example, 60 weights on one side, 120 weights on both left and right sides). The longitudinal direction of the machine base 2 (the vertical direction in FIG. 1) is the front-rear direction of the twisting machine 1, and the short direction (the left-right direction of FIG. 1) of the machine base 2 is the left-right direction of the twisting machine 1. To do.

  First, a schematic configuration of the twisted yarn unit 3 will be described. In addition, since the structure of the some twisting unit 3 is substantially the same structure, the one is demonstrated below.

  As shown in FIG. 1, each twisting unit 3 includes a twisting device 10 disposed at a lower portion of the machine base 2, a yarn feeding roller 11 that feeds a yarn subjected to twisting processing by the twisting device 10, and a yarn feeding roller. 11 is provided with a winding device 12 or the like that winds the yarn fed by 11 onto the bobbin 20.

  In the twisting device 10, the yarn Y1 unwound from the yarn supplying package 13 disposed in the lower part of the machine base 2 and the yarn Y2 unwound from the yarn supplying package 14 disposed above the machine base 2. These two yarns are twisted together to produce a twisted yarn Y.

  As shown in FIGS. 1 and 2, the twisted yarn Y manufactured by the twisting device 10 is sent to the yarn feeding roller 11 through the guide roller 15. The yarn feed roller 11 is rotatably supported by the machine base 2 and is driven to rotate by a yarn feed drive motor (not shown). Then, the twisted yarn Y is wound around the yarn feeding roller 11 a plurality of times, and is fed to the downstream winding device 12 through the guide roller 16 while the tension is appropriately lowered.

  The winding device 12 includes a winding roller 17 and a bobbin holding device 18 that holds the bobbin 20. The winding roller 17 is rotationally driven by a winding driving motor (not shown). The bobbin 20 has a flange 20b at both ends of the central shaft 20a, and is held in a rotatable state by the bobbin holding device 18 (see FIG. 5). The bobbin holding device 18 is swingably supported by a support frame 22 attached to the machine base 2 and swings up and down according to the diameter of the winding package 21 formed on the outer periphery of the bobbin 20. The outer surface of the winding package 21 is always in contact with the winding roller 17. Accordingly, the twisted yarn Y fed by the yarn feeding roller 11 is guided between the winding roller 17 and the bobbin 20 and then is transferred to the bobbin 20 (winding package 21) that rotates in conjunction with the winding roller 17. It is wound up.

  The winding package 21 formed by winding the twisted yarn Y on the bobbin 20 is removed from the bobbin holding device 18 and then travels between the left and right twisted yarn units 3 in the front-rear direction (not shown). ). And the winding package 21 each manufactured with many twisting units 3 is conveyed ahead or back by a belt conveyor.

  Next, in the configuration of the twisting unit 3 described above, the twisting device 10, the yarn feeding roller 11, and the bobbin holding device 18 of the winding device 12 will be described in detail.

  First, the twisting device 10 will be described. As shown in FIG. 1, the twisting device 10 includes a spindle 30 that is rotatably provided, a rotor 31 that is provided at a lower end portion of the spindle 30 and rotates integrally with the spindle 30, and rotates the spindle 30. A spindle drive motor 32 for driving is provided.

  A stationary bobbin container 33 is provided outside the spindle 30, and the yarn supply package 13 is accommodated in the stationary bobbin container 33. Then, the yarn Y1 unwound from the stationary yarn supply package 13 is sent to the length adjuster 35 via the tension applying device 34 located above the stationary bobbin container 33.

  A support frame 36 is fixed to the upper part of the machine base 2, a bobbin support frame 37 is connected to the support frame 36, and the yarn feeding package 14 is supported by a bobbin support shaft 38 of the bobbin support frame 37. ing. The yarn Y2 unwound from the yarn supply package 14 is guided to the spindle drive motor 32 through the guide tube 40 through the nip tensor 39. Further, the yarn Y2 passes through a hollow portion in the spindle drive motor 32 to reach the rotor 31, and is fed out in the radial direction (radially outward) by the rotor 31 that rotates together with the spindle 30. The yarn Y2 is guided to the length adjuster 35 while turning around the stationary bobbin container 33 and expanding. Further, the two yarns Y1, Y2 are twisted together while the length adjuster 35 is adjusted so that the twist length is uniform.

  Although not described in detail, the support frame 36 and the bobbin support frame 37 are connected via a parallel link. The bobbin support frame 37 is configured to be movable over two positions: an upper position of the machine base 2 shown by a solid line in FIG. 1 and a side position of the machine base 2 shown by a two-dot chain line in FIG. Thus, the bobbin support frame 37 is pulled down so that the yarn supply package 14 can be easily replaced (see JP-A-2005-48312).

  By the way, the direction in which the yarn Y2 turns around the stationary bobbin container 33 is determined by the rotation direction of the spindle 30 (rotor 31) driven by the spindle drive motor 32, and the twist direction of the twisted yarn Y (S twist or Z twist). Is determined. In the present embodiment, the rotation direction of the spindle drive motor 32 in the twisting device 10 of a part (for example, four) of the twisting units 3 among a large number of twisting units 3 arranged in the front-rear direction (perpendicular to the plane of FIG. 1). Is changed so that the twisting direction of the yarn Y in these twisting devices 10 can be changed. The specific configuration will be described below.

  FIG. 3 is a diagram schematically showing a power supply system and a control configuration of the spindle drive motor 32 of the twisting device 10. In FIG. 3, some (five) of the plurality of spindle drive motors 32 are shown.

  A control device 50 that controls the entire twisting machine 1 includes a CPU (Central Processing Unit) that is an arithmetic processing unit, a program executed by the CPU, and a ROM (Read-Only Memory) that stores data used for the program. ) And a RAM (Random Access Memory) for temporarily storing data when the program is executed. The control device 50 controls the operation of each part of the twisting machine 1 such as a driving motor for the yarn feeding roller 11 and a driving motor for the winding roller 17 (not shown) in addition to the spindle driving motor 32 of the twisting device 10.

  The power supply unit 51 supplies power to various motors of the twisting machine 1 and supplies three-phase alternating current (U, V, W) to the spindle drive motors 32 of the plurality of twisting units 3. Are connected via three power lines 52a, 52b, and 52c. The power supply unit 51 supplies predetermined power to the spindle drive motor 32 based on a command from the control device 50 regarding the motor rotation direction, rotation speed, and the like.

  A set of three electromagnetic switches 53 is provided between the three stator coils (U, V, W) of the stator of each spindle drive motor 32 and the three power lines 52a, 52b, 52c. . Then, the switch controller 55 of the control device 50 performs ON / OFF switching of the electromagnetic switch 53 to switch ON / OFF of the spindle drive motor 32.

  2 and 3, the machine base 2 is provided with a switch 56 for turning on / off the spindle drive motor 32 for each twisting device 10. The ON / OFF switch 56 is provided at an appropriate position on the machine base 2 that is easy for an operator to operate. When the switch 56 is switched, the signal is sent to the control device 50, and the switch controller 55 switches the electromagnetic switch 53 ON / OFF, that is, the spindle drive motor 32 ON / OFF. That is, it is possible to stop only the spindle drive motor 32 of the specific twisting unit 3 among the many twisting units 3 by switching the ON / OFF switch 56 provided in the specific twisting unit 3 to OFF. .

  Further, among a plurality (for example, 60 spindles) of the twisting unit 3 arranged in a line in the longitudinal direction of the machine base 2, the spindle drive motor 32 (in FIG. 3) of some (for example, four) twisting units 3. In addition to the electromagnetic switch 53 described above, another set of electromagnetic switches is provided between the two spindle drive motors 32b) located on the right side and the three power lines 52a, 52b, 52c. 54 is provided. This electromagnetic switch 54 has three power lines 52a, 52b, 52c and three coils (U, V, W) of the stator connected to the electromagnetic switch 53 so that the U phase and the W phase are connected. It connects so that it may become reverse.

  Therefore, when the spindle drive motor 32 (32b) of some twisting unit 3 is connected to the three power lines 52a, 52b, 52c via the electromagnetic switch 53, the other spindle drive motor 32 ( 32a) and the rotation direction are the same. When the spindle drive motors 32 (32b) of some twisting units 3 are connected to the three power lines 52a, 52b, 52c via the electromagnetic switch 54, the other spindle drive motors 32 ( 32a) and the rotation direction is reversed.

  As shown in FIGS. 2 and 3, the machine base 2 has a twisting direction of the yarn Y in a part of the twisting device 10 having a part of the spindle drive motor 32 (32 b) as described above. A changeover switch 57 is provided for switching between “twist direction same as that of the other twisting device 10)” and “reverse twisting (twisting direction opposite to that of the other twisting device 10)”. Note that only one changeover switch 57 is provided for some of the twisting devices 10 so that the twisting directions of some (for example, four) twisting devices 10 can be switched simultaneously. . The changeover switch 57 is provided side by side with the ON / OFF switch 56 at an appropriate position where the operator of the machine base 2 can easily operate.

  When the changeover switch 57 is changed to “positive twist”, the changeover signal is sent to the control device 50, and an electromagnetic switch provided to some of the spindle drive motors 32 (32b) by the switch control unit 55. At the same time that 53 is switched ON, the electromagnetic switch 54 is switched OFF. Then, the rotation directions of some of the spindle drive motors 32 (32b) are the same as those of the other spindle drive motors 32 (32a). That is, the twisting direction in some twisting devices 10 is the same as that of other twisting devices 10.

  On the other hand, when the changeover switch 57 is changed to “reverse twisting”, the changeover signal is sent to the control device 50, and an electromagnetic switch provided to some of the spindle drive motors 32 (32b) by the switch control unit 55. At the same time that 53 is switched OFF, the electromagnetic switch 54 is switched ON. Then, the rotation direction of some of the spindle drive motors 32 (32b) is opposite to that of the other spindle drive motors 32 (32a). In other words, the twisting direction of some twisting devices 10 is opposite to that of other twisting devices 10.

  The changeover switch 57 and the electromagnetic switches 53 and 54 described above and the switch control unit 55 of the control device 50 correspond to the twist direction changing means of the present invention that changes the twist direction of the twisting device 10.

  By the way, if the rotation direction is changed while the spindle 30 is rotating, an excessive load is applied to the spindle drive motor 32 and the parts of the twisting device 10 are adversely affected. For this reason, the switching operation of the changeover switch 57 needs to be performed while the spindle 30 is stopped. However, in the unlikely event that the changeover switch 57 is switched during the rotation of the spindle drive motor 32, the control device 50 rotates the rotation direction of the switch control unit 55 so that the rotation direction of the drive motor 32 is not switched. Is provided with a switching prohibition unit 58 that prohibits switching between the two.

  When the changeover switch 57 is mistakenly switched while the spindle drive motor 32 is being driven, the switch prohibiting unit 58 prohibits switching of the rotation direction by the switch control unit 55. At the same time, the switch controller 55 turns off both the electromagnetic switches 53 and 54 and stops the spindle drive motor 32 (32b). After a predetermined time required for the spindle 30 to completely stop, the switch control unit 55 turns on the electromagnetic switch 53 or the electromagnetic switch 54 to move the spindle drive motor 32 to the immediately preceding direction. Rotate in the opposite direction.

  Alternatively, when the changeover switch 57 is mistakenly switched while the spindle drive motor 32 is being driven, the changeover prohibiting unit 58 may only invalidate the changeover operation of the changeover switch 57. In this case, the twisting process is continuously performed in the same state (same twist direction) as immediately before the changeover switch 57 is switched.

  As described above, in the twisting machine 1 according to the present embodiment, the twisting direction of the yarn in some of the twisting devices 10 can be changed by switching the changeover switch 57. It is possible to produce two types of twisted yarns Y whose directions are opposite to each other. Furthermore, since the twisting direction of the yarn Y in a part (for example, four) of the plurality of twisting devices 10 can be set in a direction opposite to the twisting direction of the yarn Y in the remaining twisting devices 10, In the partial twisting device 10, a twisted yarn Y having a certain twisting direction can be produced, and in the remaining part of the twisting device 10, a small amount of twisted yarn Y having a reverse twisting direction can be produced. That is, two types of twisted yarn Y can be manufactured without reducing the production efficiency.

  Next, the yarn feed roller 11 will be described in detail. 4 is a cross-sectional view taken along line IV-IV in FIG. As shown in FIGS. 2 and 4, the yarn feed roller 11 is fixed to one end of a shaft 60 that is rotatably supported by the machine base 2 via two bearings 61 and 62. A pulley 63 is provided at the other end of the shaft 60, and the yarn feed roller 11 is rotationally driven by a drive motor (not shown) via the pulley 63.

  A guide roller 64 is provided in the vicinity of the yarn feeding roller 11. The guide roller 64 is rotatably supported by a rotary shaft 66 fixed to the machine base 2 via a holder 65. A spiral groove 66 a (guide groove) is formed on the surface of the guide roller 64.

  As shown in FIG. 4, the twisted yarn Y extends from the proximal end portion (left end portion in FIG. 4) to the distal end portion (right end portion in FIG. 4) over the yarn feed roller 11 and the guide roller 64. ) Is wound multiple times. When the yarn feed roller 11 is rotationally driven, the twisted yarn Y is sent to the winding device 12 on the downstream side while the tension is lowered by friction with the yarn feed roller 11. At this time, the twisted yarn Y is guided by the spiral groove 66a of the guide roller 64 and wound around the axial direction of the yarn feed roller 11 at a predetermined interval, so that the yarn Y wound a plurality of times overlaps. There is no.

  Further, as shown in FIG. 4, the surface of the base end side portion 11a of the yarn feed roller 11 is mirror-finished, and the surface of the tip end portion 11b of the yarn feed roller 11 is surface rougher than the mirror finish. Has a large satin finish with a small coefficient of friction. That is, the surface roughness of the front end portion 11b of the yarn feed roller 11 is larger than the surface roughness of the proximal end portion 11a. The surface treatment of the yarn feed roller 11 can be performed as follows, for example. First, a satin finish is performed by forming irregularities by shot blasting on the entire surface of the yarn feed roller 11. Next, only the surface of the base end side portion 11a of the yarn feeding roller 11 is polished to reduce the surface roughness, thereby giving a mirror finish. Thereafter, the entire surface of the yarn feed roller 11 is plated.

  In this way, since the friction coefficient is large on the surface of the base end side portion 11a around which the yarn Y is wound first, the tension of the twisted yarn Y is greatly reduced. On the other hand, since the friction coefficient is smaller in the distal end portion 11b of the yarn feed roller 11 than in the proximal end portion 11a, the tension of the twisted yarn Y is gradually lowered.

  Therefore, even when the tension of the twisted yarn Y on the upstream side of the yarn feeding roller 11 is high, the tension can be greatly reduced in the base end side portion 11a subjected to the mirror finish. Therefore, without increasing the length of the yarn feed roller 11 and increasing the number of windings of the yarn Y, the tension of the yarn Y can be lowered appropriately, and the yarn Y is reliably sent to the winding device 12 on the downstream side. Can do. Further, since the surface roughness of the tip end portion 11b of the yarn feed roller 11 is larger than that of the base end portion 11a, the tension of the twisted yarn Y is excessively lowered at the tip end portion of the yarn feed roller 11 and the yarn Y is loosened. Is prevented.

  In other words, according to the yarn feed roller 11, by adjusting the winding position of the yarn Y, the tension does not become too high, or the tension is not excessively lowered to cause looseness. It becomes possible to finely adjust the tension of the yarn Y.

  Further, since the yarn that is hardly twisted sent from the twisting device 10 immediately after the start of twisting processing has a larger contact area with the yarn feeding roller 11 than the yarn Y, the yarn feeding roller 11 The larger the surface friction coefficient, the easier it is to wind. However, since the surface roughness of the base end portion 11a is increased, such winding is also suppressed.

  Next, the bobbin holding device 18 will be described in detail. 5 is a view of the bobbin holding device 18 of FIG. 2 as viewed from the right side, and FIG. 6 is a plan view of the bobbin holding device 18. As shown in FIGS. 2, 5, and 6, the bobbin holding device 18 includes a base material 70 connected to the support frame 22 and two cradle arms 71 and 72 supported by the base material 70 in a swingable manner. And two bobbin holding parts 73 and 74 that are provided on the two cradle arms 71 and 72, respectively, and the two bobbin holding parts 73 and 74 approach each other (closing direction: direction of arrow A in FIG. 5). And a spring 75 (biasing member) for urging the two cradle arms 71 and 72.

  The base material 70 is a member that extends in the front-rear direction (perpendicular to the plane of FIG. 2) and is formed in an inverted U shape when viewed from the longitudinal direction. The base material 70 is connected to the support frame 22 via link members 90, 91, 92, and is configured to be able to swing up and down so that the winding package 21 always contacts the winding roller 17. Yes.

  As shown in FIGS. 5 and 6, each of the two cradle arms 71 and 72 includes base portions 71a and 72a extending in the front-rear direction, and support portions 71b and 72b extending downward from the base portions 71a and 72a. It is formed in an L shape. In addition, the two cradle arms 71 and 72 are rotatably supported by shafts 76 at both front and rear ends of the base material 70 at their bent portions. That is, the two cradle arms 71 and 72 are supported by the base material 70 so as to be swingable back and forth about the shaft 76.

  A plate-shaped small piece 77 is fixed to the lower surface of the distal end portion of the base portion 71a of the cradle arm 71 located on the front side. As shown in FIG. 5, the lower surface of the small piece 77 is formed in a circular arc shape in cross section. Then, the upper surface of the distal end of the base 72 a of the cradle arm 72 located on the rear side is in contact with the arcuate lower surface of the small piece 77.

  The two opposing bobbin holding portions 73 and 74 are attached to the insides of the tip portions (lower end portions) of the support portions 71b and 72b of the two cradle arms 71 and 72, respectively. The two bobbin holding portions 73 and 74 hold the two flange portions 20b provided at both ends of the shaft 20a of the bobbin 20, and the bobbin 20 rotates between the two cradle arms 71 and 72. It is supported freely.

  A spring housing member 78 is disposed inside the rear end of the base material 70, and the spring housing member 78 is fixed to the base material 70 with two screws 79. A hole 78a that opens rearward is formed in the spring accommodating member 78, and the spring 75 is accommodated in the hole 78a. On the other hand, the upper end of the support portion 72 b of the rear cradle arm 72 protrudes further upward than the base portion 72 a, and the protrusion 85 closes a hole 78 a provided in the spring accommodating member 78. The rear end of the spring 75 inside the hole 78 a is in contact with the protruding portion 85. Accordingly, the projecting portion 85 is urged rearward by the spring 75, and as a result, the support portion 72b of the rear cradle arm 72 is urged forward. At the same time, the tip of the base 71a of the front cradle arm 71 is pushed up via the small piece 77 by the tip of the base 72a of the rear cradle arm 72, so that the support 71b of the front cradle arm 71 moves rearward. Be energized. That is, the two cradle arms 71 and 72 are urged by the spring 75 in the closing direction in which the two bobbin holding portions 73 and 74 approach (direction in which the bobbin 20 is sandwiched: the direction of arrow A in FIG. 5).

  The bobbin holding device 18 of the present embodiment biases the two cradle arms 71 and 72 in the closing direction so that the winding package 21 having a relatively large weight (for example, a little over 10 kg) can be held. A spring 75 having a large urging force is selected.

  By the way, the cradle arm 71 on the front side swings the two cradle arms 71 and 72 in the direction in which the two bobbin holding portions 73 and 74 are separated from each other, that is, in the opening direction (direction of arrow B in FIG. 5). Handles 80 and 81 are provided. First, a handle 80 (first release handle) extending rightward is fixed to the right surface of the distal end portion of the base 71a of the cradle arm 71. A handle 81 (second opening handle) extending rightward is also fixed to the distal end portion of the support portion 71 b of the cradle arm 71.

  When the handle 80 is pulled down or the handle 81 is pushed forward (outside), the front cradle arm 71 swings in the opening direction (the direction of arrow B) against the biasing force of the spring 75. At the same time, the front end portion of the base portion 71a of the front cradle arm 71 moves downward and presses the front end portion of the base portion 72a of the rear cradle arm 72 downward via the small piece 77, so that the rear cradle arm 72 Swings in the opening direction (in the direction of arrow B) against the biasing force of the spring 75. That is, by one handle operation, the two cradle arms 71 and 72 are simultaneously swung in the opening direction, and both end portions of the bobbin 20 are simultaneously detached from both the cradle arms 71 and 72. Accordingly, the bobbin 20 can be easily removed even when the winding package 21 is heavy.

  The handle 80 is attached in the vicinity of the connecting portion (contact portion) of the two cradle arms 71 and 72. The operation of pulling down the handle 80 is a state facing the bobbin 20 (a state facing FIG. 5). ), It is easier to apply a force than the operation of pushing the handle 81 outward (forward) while spreading the sides. Therefore, even when the biasing force of the spring 75 (the clamping force of the cradle arms 71 and 72) is large, the bobbin 20 (winding package 21) can be easily removed by operating the handle 80.

  Furthermore, since the cradle arm 71 is provided with the two handles 80, 81 for opening, the handle that is easier for the operator to operate can be selected and used. Alternatively, the two handles 80 and 81 can be operated simultaneously, such as pressing the handle 81 outward with the left elbow while grasping and pulling down the handle 80 with the left hand, so that the bobbin 20 can be removed quickly. Is possible.

  Next, modified embodiments in which various modifications are made to the embodiment will be described. However, components having the same configuration as in the above embodiment are given the same reference numerals and description thereof is omitted as appropriate.

  1] In the above embodiment, one changeover switch 57 is provided for all (for example, four) twisting devices 10 that can change the twisting direction (see FIG. 3). A changeover switch 57 may be provided for each of the twisting devices 10, and the twisting direction may be changed for each twisting device 10.

  2] In the above-described embodiment, a switching signal from the changeover switch 57 is output to the control device 50, and the ON / OFF of the electromagnetic switches 53 and 54 is controlled by the switch control unit 55 of the control device 50, so that the spindle drive motor The rotation direction of 32 is switched (see FIG. 3), but the switching operation of the changeover switch 57 switches the ON / OFF of the electromagnetic switches 53 and 54 directly (not via the control device 50). It may be configured to be.

  3] A plurality of regions having different surface roughnesses exist in the axial direction on the surface of the yarn feed roller 11, and the surface roughness of these regions gradually increases from the base end to the tip. Also good. Even in this configuration, the yarn Y can be reliably fed by properly reducing the tension of the twisted yarn Y, and the winding and loosening of the yarn Y can be prevented as in the above embodiment. Further, since the surface friction coefficient of the yarn feed roller 11 gradually decreases from the base end portion toward the tip end portion, the tension of the yarn Y can be adjusted more finely.

  4] In the bobbin holding device (see FIG. 5), not only one (front side) cradle arm 71 but also the other (rear side) cradle arm 72 may be provided with two handles 80 and 81. In this case, the bobbin 20 can be removed by operating the two handles 80, 81 with the right hand (pushing the handle 81 outward with the right elbow while pulling down the handle 80 with the right hand).

  In the above-described embodiment, the handles 80 and 81 are provided at both ends (the front end portion of the base portion 71a and the front end portion of the support portion 71b) of one (front side) cradle arm 71, but the front end portion of the base portion 71a. It is easy to apply a downward force to the handle 80 provided on the cradle arm, and it is easier to open the cradle arms 71 and 72 than the handle 81 provided on the support portion 71b. May be omitted.

It is the figure seen from the longitudinal direction of the machine base of the twisting machine which concerns on embodiment of this invention. FIG. 2 is a partially enlarged view of FIG. 1. It is a figure which shows roughly the electric power supply system and control structure of the spindle drive motor of a twisting apparatus. It is the IV-IV sectional view taken on the line of FIG. It is the figure which looked at the bobbin holding device of FIG. 2 from the right side. It is a top view of a bobbin holding device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Twisting machine 10 Twisting apparatus 11 Thread feeding roller 18 Bobbin holding | maintenance apparatus 20 Bobbin 30 Spindle 31 Rotor 32 Spindle drive motor 53 Electromagnetic switch 54 Electromagnetic switch 55 Switch control part 57 Switching switch 58 Switching prohibition part 64 Guide roller 66a Guide Groove 70 Base material 71, 72 Cradle arm 73, 74 Bobbin holding part 75 Spring 80 Handle (first opening handle)
81 Handle (second opening handle)

Claims (3)

A twisting device that includes a spindle, a rotor that rotates integrally with the spindle, and a drive motor that rotationally drives the spindle, and twists the yarn by the rotation of the rotor;
Twist direction changing means for changing the twist direction of the yarn in the twisting device by switching the rotation direction of the drive motor;
A twisting machine characterized by comprising: Comprising a plurality of twisting devices,
The twisting direction changing means sets the twisting direction of the yarn in a part of the plurality of twisting devices to a direction opposite to the twisting direction of the yarn in the remaining twisting devices. Twisting machine.   3. The twisting machine according to claim 1, further comprising a switching prohibiting unit that prohibits switching of the rotational direction of the driving motor by the twisting direction changing unit while the driving motor is rotating.

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