JP2019023120A - Yarn splicing device and yarn winding device - Google Patents

Abstract

To introduce yarn having a length according to a yarn kind thereof to an untwisting pipe, without performing complicated adjustment, etc.SOLUTION: A distance D2 between a rotation axis 105a and a contact point 99c with a first cam follower 112 on a second cam surface 111a2, when rotating a first rotation cam 111 by an angle θ in a first direction from an original position, as viewed from above is smaller than a distance D1 between the rotation axis 105a and a contact point 99b with the first cam follower 112 on a first cam surface 111a1, when rotating the first rotation cam 111 by the angle θ in the first direction from the original position, as viewed from above. Then, as the distance is smaller, a difference of the foregoing distance and a distance D0 between the rotation axis 105a and a contact point 99a of a cam surface 111a at a time when the first rotation cam 111 is present at the original position, with the first cam follower 112 becomes larger, and a moving amount of a thread handler arm becomes larger. Accordingly, yarn is largely bent, and thus yarn end length introduced into an untwisting pipe becomes long.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a yarn joining device that performs yarn joining, and a yarn winding device including the yarn joining device.

  In the winder unit described in Patent Literature 1, when the yarn feeding bobbin side yarn and the winding bobbin side yarn are spliced by the yarn splicing device, the yarn shifting lever driven by the cam mechanism is rotated, The yarn is introduced into the untwisting pipe by cutting it with a cutter after bringing it to the back side. Then, a swirling air flow is generated in the untwisting pipe to untwist the yarn end introduced into the untwisting pipe. After the yarn ends are untwisted, the yarn gathering lever is further rotated to draw out the untwisted yarn ends from the untwisting pipe and set them in the yarn joining holes. Then, a swirling air flow is generated in the yarn joining hole, and the untwisted yarn ends are twisted together to join the yarns.

Japanese Unexamined Patent Publication No. 2016-199381

  Here, in the yarn splicing device as described in Patent Document 1, the length of the yarn end introduced into the untwisting pipe may be changed depending on the type of yarn. For example, when the yarn is highly stretchable, the length of the yarn end introduced into the untwisted pipe is increased in order to stabilize the length of the yarn end introduced (sucked) into the untwisted pipe. The length of the yarn end introduced into the untwisting pipe can be changed depending on how much the yarn gathering lever is rotated before the yarn is introduced into the untwisting pipe.

  In Patent Document 1, since the yarn shifting lever is rotated by the cam mechanism, the rotation amount of the yarn shifting lever is adjusted by adjusting the rotation amount of the motor that drives the cam mechanism (rotation amount of the cam). Can be considered. However, since adjusting the rotation amount also affects the synchronized cam, instead of adjusting the cam rotation amount, the length of the link mechanism connected from the cam follower contacting the cam is adjusted. Such adjustment has been complicated.

  An object of the present invention is to provide a yarn joining device capable of introducing a yarn having a length corresponding to the type of yarn into an untwisting pipe without complicated adjustments, and a yarn winding device including the yarn joining device. Is to provide a device.

  The yarn splicing device of the present invention is a yarn splicing device for splicing two yarns, has two untwisting pipes into which the yarn ends of each yarn are introduced, and is introduced into the untwisting pipe Two yarns having an untwisting portion for untwisting the yarn end and a twisting nozzle into which the yarn ends of the two yarns untwisted at the untwisting portion are introduced and introduced into the twisting nozzle A twisting section for twisting ends, a yarn shifting lever for guiding yarn to the untwisting pipe and the twisting nozzle, and a first cam mechanism for transmitting power from a driving source to the yarn shifting lever, The first cam mechanism includes a first rotating cam that rotates about a predetermined rotating shaft, and a first cam follower that contacts a cam surface of the first rotating cam. When not performed, it is located at a predetermined origin position and rotated at an angle within 180 ° in the first direction from the origin position. A first cam surface that comes into contact with the first cam follower and a second cam that comes into contact with the first cam follower when rotated from the origin position in a second direction opposite to the first direction within an angle of 180 ° And the first cam surface is configured so that the yarn-feeding lever and the yarn end of the yarn are in a state where the first rotating cam is rotated in the first direction by a first angle from the origin position. The second cam surface is formed at a first untwisting position for introduction into the untwisting pipe by a first length, and the second cam surface is formed by the first rotation cam from the origin position by a second angle. In a state rotated in two directions, the yarn shifting lever is positioned at a second untwisting position for introducing the yarn end of the yarn into the untwisting pipe by a second length longer than the first length. Is formed.

  According to the present invention, the length of the yarn end introduced into the untwisting pipe can be changed depending on the rotation direction of the first rotating cam. Accordingly, it is possible to introduce a yarn having an appropriate length into the untwisting pipe according to the type of the yarn without performing complicated adjustment.

  In the yarn splicing device of the present invention, the first cam surface may be configured so that the first cam is rotated in the first direction further than the first angle from the origin position, and The yarn end untwisted by the untwisting part is formed to be positioned at a twisting position for introducing the yarn end into the twisting nozzle, and the second cam surface is formed by the first rotating cam from the origin position. It is formed so that the yarn shifting lever is positioned at the twisting position in a state where it is further rotated in the second direction than the second angle.

  According to the present invention, after the yarn end is untwisted at the untwisting portion, the untwisted yarn end can be introduced into the twisting nozzle by further rotating the first rotating cam.

  In the yarn splicing device of the present invention, the first angle and the second angle are the same size.

  Regardless of the direction of rotation of the first rotating cam, the rotation angle of the first rotating cam when the yarn is introduced into the untwisting pipe can be made the same, so that the control of the yarn splicing device is simplified. Can do.

  In the yarn splicing device of the present invention, the yarn splicing device includes a second rotating cam that rotates integrally with the first rotating cam, and a second cam follower that contacts the cam surface of the second rotating cam. A second cam mechanism having a cam surface of the second rotating cam when the first rotating cam is located at the origin position when viewed from a direction parallel to the rotating shaft. The cam surface of the two-rotation cam is symmetric with respect to a straight line connecting the contact point with the second cam follower and the rotation shaft.

  According to the present invention, the magnitude of the rotation angle of the first rotation cam when the yarn is introduced into the untwisting pipe is the same regardless of the rotation direction of the first rotation cam. While changing the length of the yarn end introduced into the untwisting pipe, the same operation can be performed on the power transmission target by the second cam mechanism.

  The yarn splicing device of the present invention includes the first cam follower on the first cam surface in a state where the first rotating cam is located at the origin position when viewed from a direction parallel to the rotating shaft. The first cam of the second cam surface in a state in which the first rotating cam is rotated in the second direction by the second angle from the origin position with a distance between the contact point of the rotating shaft and the rotating shaft as a reference distance. The difference between the reference distance and the distance between the contact point with one cam follower and the rotating shaft is that the first rotating cam rotates in the first direction by the first angle from the origin position. The distance between the contact point of the first cam surface with the first cam follower and the rotation shaft is larger than the difference between the reference distance and the first rotation cam from the origin position to the second position. When rotated in the second direction by an angle, the original The length of the yarn end of the yarn introduced into the untwisting pipe is greatly bent as the yarn shifting lever moves more than when rotated in the first direction from the position by the first angle. Is configured to be long.

  According to the present invention, if the yarn splicing device has such a configuration, when the first rotating cam is rotated by the second angle from the reference position in the second direction, the first angle is rotated from the reference position by the first angle in the first direction. The length of the yarn end introduced into the untwisting pipe can be lengthened by largely moving the yarn gathering lever so that the yarn is bent largely.

  The yarn splicing device of the present invention further includes a sensor for detecting that the first rotating cam is located at the origin position.

  According to the present invention, the first rotary cam can be rotated after being accurately aligned with the origin position, so that the yarn gathering lever can be accurately positioned at a necessary position at the time of yarn joining.

The yarn winding device of the present invention is a yarn winding device including the yarn joining device of the present invention,
A yarn supplying section for supplying yarn;
A winding unit for winding the yarn supplied from the yarn supplying unit;
The yarn joining device, which is arranged between the yarn feeding unit and the winding unit, and performs yarn joining between the yarn end of the yarn on the yarn feeding unit side and the yarn end of the yarn on the winding unit side; A yarn winding device comprising:

  According to the present invention, the length of the yarn end introduced into the untwisting pipe can be changed by changing the rotation direction of the first rotating cam. Accordingly, it is possible to introduce a yarn having an appropriate length into the untwisting pipe in accordance with the type of yarn supplied from the yarn supplying unit and wound by the winding unit.

The yarn splicing device of the present invention further includes a drive source connected to the first cam mechanism, and a control device that controls the drive source, and the control device is supplied from the yarn supplying section. When information related to the yarn core ratio is input and the yarn core ratio indicated by the information is less than a predetermined value, the drive source is controlled to rotate the first rotating cam in the first direction. Then, power is transmitted from the drive source to the yarn shifting lever via the first cam mechanism, and when the core ratio of the yarn indicated by the information is equal to or greater than the predetermined value, the first rotary cam is moved to the first rotation cam. The drive source is controlled to rotate in two directions, and power is transmitted from the drive source to the yarn moving lever via the first cam mechanism.

  Yarns with a high core ratio tend to be highly stretchable. Strongly stretchable yarns tend to expand and contract, and the suction of the yarn end introduced into the untwisting pipe is not stable. Therefore, in the present invention, when the core ratio of the yarn is high (stretchability is strong), the length of the portion to be untwisted is ensured by increasing the length of the yarn end introduced into the untwisting pipe. Thus, the success rate of yarn joining can be increased.

  According to the present invention, the length of the yarn end introduced into the untwisting pipe can be changed by changing the rotation direction of the first rotating cam. Accordingly, it is possible to introduce a yarn having an appropriate length into the untwisting pipe according to the type of the yarn without performing complicated adjustment.

It is a schematic block diagram of the automatic winder which concerns on embodiment of this invention. It is a schematic block diagram of the winding unit which comprises an automatic winder. It is a schematic block diagram of a yarn splicing device, (a) is a state immediately before the cutting of the yarn by the cutter, (b) is a state in which the yarn end is introduced into the untwisting pipe, and (c) is an untwisted yarn end. Shows a state of being introduced into the twisting nozzle. It is a perspective view which shows the structure of a yarn splicing device. It is the perspective view seen from the direction different from FIG. 4 which shows the structure of a yarn splicing device. (A) is a figure which shows the positional relationship of the yarn shifting lever and 1st cam mechanism in an initial state, (b) is a figure which shows the positional relationship of the clamp mechanism and 2nd cam mechanism in an initial state. (C) is a diagram showing the positional relationship between the cutter and the second cam mechanism in the initial state. (A) is a top view of a 1st rotation cam, (b) is a top view of a 2nd rotation cam. FIGS. 6A and 6B are views showing a state in which the first and second rotating cams are rotated by θ in the first direction from the origin position, where FIG. 6A corresponds to FIG. 6A and FIG. (C) is a figure corresponding to Drawing 6 (c). It is a figure which shows the state which rotated the 1st, 2nd rotation cam further in the 1st direction, (a) is a figure corresponding to Fig.6 (a), (b) is a figure corresponding to FIG.6 (b). (C) is a figure corresponding to Drawing 6 (c). It is a figure which shows the state which rotated the 1st, 2nd rotation cam by (theta) in the 2nd direction from the origin position, (a) is a figure corresponding to Fig.6 (a), (b) is FIG.6 (b). (C) is a figure corresponding to Drawing 6 (c). It is a figure for demonstrating the difference in the length of the yarn end introduce | transduced into an untwisting pipe, When (a) rotates the 1st and 2nd rotation cam to a 1st direction, (b) is 1st. FIG. 10 is a diagram when the second rotating cam is rotated in a second direction. It is a figure which shows the state which rotated the 1st, 2nd rotation cam further in the 2nd direction, (a) is a figure corresponding to Fig.6 (a), (b) is a figure corresponding to FIG.6 (b). (C) is a figure corresponding to Drawing 6 (c). It is a block diagram which shows the electric constitution of an automatic winder. It is a flowchart which shows the flow of control by the unit control apparatus when performing yarn splicing with a yarn splicing device.

  Hereinafter, preferred embodiments of the present invention will be described.

<Automatic winder>
As shown in FIG. 1, the automatic winder 1 includes a plurality of winding units 2 (“yarn winding device” of the present invention) arranged in one direction, and an arrangement direction along the plurality of winding units 2. The doffing device 3 is provided so as to be able to run freely, and the machine base control device 4 that controls the entire automatic winder 1 is provided. In the following description, the left-right direction in FIG. 1 in which a plurality of winding units 2 are arranged will be described as “left-right direction”. In the following description, the vertical direction in FIG. 1 is the front-rear direction, the front side in the vertical direction in FIG. 1 is “front side”, and the back side is “rear side”.

  The automatic winder 1 sends a signal from the machine base control device 4 to a unit control device 150 (see FIG. 13) provided individually for each winding unit 2, and the yarn feeding bobbin in each winding unit 2. The yarn Y unwound from B is wound around a winding tube Q to form a package P. When a full package P is formed in a certain winding unit 2, the doffing device 3 moves to a position facing the winding unit 2, and the full package P is removed from the empty winding tube Q. It is supposed to be replaced with. In addition, the machine control device 4 controls the operation of the unit control device 150 (see FIG. 13) of each winding unit 2, and monitors the operation state of the entire automatic winder 1, sets operation parameters, and stores the operation parameters.

  Next, the detailed configuration of each winding unit 2 will be described. The winding unit 2 forms a package P by winding the yarn Y unwound from the yarn supplying bobbin B while winding it around the winding tube Q.

  As shown in FIG. 2, the winding unit 2 is unwound from a yarn supplying unit 11 that holds the yarn Y of the yarn supplying bobbin B in a state where it can be supplied, and a yarn supplying bobbin B that is held by the yarn supplying unit 11. A yarn processing execution unit 12 that performs various processes on the yarn Y, and a winding unit 13 that winds the yarn Y processed by the yarn processing execution unit 12 around a winding tube Q to form a package P. . The yarn feeding unit 11, the yarn processing execution unit 12, and the winding unit 13 are arranged in this order from bottom to top.

  The yarn supplying unit 11 includes a bobbin holding unit 15 that holds the yarn supplying bobbin B and a unwinding assisting device 16 that assists in unwinding the yarn Y from the yarn supplying bobbin B. The unwinding assisting device 16 has a cylindrical body 29 that covers the yarn feeding bobbin B from above. The cylinder 29 is moved up and down by a cylinder drive motor 151 (see FIG. 13). The unwinding assisting device 16 regulates the swelling (balloon) of the yarn Y being unwound by lowering the tubular body 29 by the tubular body drive motor 151 (see FIG. 13) as the unwinding of the yarn Y progresses. And the tension of the yarn Y is stabilized.

  The winding unit 13 includes a cradle 14 that grips the winding tube Q in a rotatable manner, and a traverse drum 18. The traverse drum 18 is rotationally driven by a drum motor 152 (see FIG. 13). A spiral traverse groove 18a is formed on the outer peripheral surface of the traverse drum 18, and the yarn Y is traversed by the traverse groove 18a. Then, the traverse drum 18 rotates while contacting the package P formed on the winding tube Q while traversing the yarn Y by the traverse groove 18a, so that the package is caused by contact friction with the traverse drum 18. P rotates in the winding direction, and the yarn Y unwound from the yarn supplying bobbin B is wound on the winding tube Q.

  The yarn processing execution unit 12 disposed between the yarn supplying unit 11 and the winding unit 13 includes a yarn feeler 19, a tension applying device 20, a yarn joining device 21, and a yarn clearer 22.

  The yarn feeler 19 is disposed between the unwinding assisting device 16 and the tension applying device 20, and detects the presence or absence of the yarn Y.

  The tension applying device 20 applies a predetermined tension to the traveling yarn Y. FIG. 2 shows a so-called gate-type tension applying device 20 as an example. In the gate tension applying device 20, a plurality of fixed gate bodies 20a and a plurality of movable gate bodies 20b are alternately arranged in the vertical direction. Then, by adjusting the horizontal position of the plurality of movable gate bodies 20b, tension is applied to the yarn Y that travels between the fixed gate body 20a and the movable gate body 20b.

  The yarn joining device 21 is fed when a yarn defect is detected by a yarn clearer 22 to be described later and the yarn Y is cut by the cutter 22a, or when the yarn is broken during winding of the package, or when the yarn on the yarn feeding bobbin B runs out. When the yarn bobbin B is not detected by the yarn feeler 19, such as when the yarn bobbin B is replaced, the yarn Y1 on the yarn feeding bobbin B side and the yarn Y2 on the package P side are spliced.

  On the lower side and the upper side of the yarn joining device 21, a yarn catching guide member 23 that catches the yarn Y1 on the yarn feeding bobbin B (yarn feeding unit 11 side) and guides it to the yarn joining device 21, and the package P side (winding) A yarn catching guide member 24 for catching and guiding the yarn Y2 on the take-up portion 13 side) to the yarn joining device 21 is provided. The yarn catching guide member 23 is rotatable about a shaft 23a, and is turned up and down by being driven to rotate by a turning motor 153 (see FIG. 13). The yarn catching guide member 24 is also configured to be rotatable about a shaft 24a, and is rotated up and down by being driven to rotate by a turning motor 154 (see FIG. 13). The yarn catching guide member 23 and the yarn catching guide member 24 are each connected to a suction source (not shown).

  The yarn catching guide member 23 has a suction portion 23b that sucks and catches the yarn end of the yarn Y1 on the yarn feeding portion 11 side at the tip thereof. In a state where the yarn catching guide member 23 is trapped at the lower position and the yarn end of the yarn Y1 is caught by the suction portion 23b, the yarn catching guide member 23 turns upward to guide the yarn Y1 to the yarn joining device 21. To do.

  The yarn catching guide member 24 has a suction mouth 24b that sucks and catches the yarn end of the yarn Y2 on the winding portion 13 side at the tip thereof. First, the yarn catching guide member 24 is swung upward from below to place the suction mouth 24b in the vicinity of the contact point between the package P and the traverse drum 18, so that the yarn Y2 attached to the surface of the package P Aspirate the yarn end and catch it. Then, after catching the yarn end of the yarn Y2, the yarn catching guide member 24 turns downward from above to guide the caught yarn Y2 to the yarn joining device 21.

  The yarn joining device 21 connects the yarn end portion of the yarn Y1 guided by the yarn catching guide member 23 and the yarn end portion of the yarn Y2 guided by the yarn catching guide member 24 into one yarn Y. To do. The configuration and operation of the yarn joining device 21 will be described in detail later.

  The yarn clearer 22 always obtains information on the thickness of the traveling yarn Y, and based on the information on the thickness of the yarn Y, the yarn clearer 22 identifies an abnormal portion whose thickness is greater than a certain value as a yarn defect. Detect as. The yarn clearer 22 is provided with a cutter 22a. When a yarn defect is detected by the yarn clearer 22, the cutter 22a immediately cuts the yarn Y.

<Thread joining device>
Next, the yarn joining device 21 will be described in detail. As shown in FIGS. 3A to 3C, the yarn joining device 21 includes an untwisting portion 31, a twisting portion 32, an upper guide plate 33, a lower guide plate 34, a yarn shifting lever 35a, 35b and twist guides 36a and 36b.

  The untwisting part 31 is for untwisting the yarn ends of the yarns Y1 and Y2. The untwisting part 31 has two untwisting pipes 41a and 41b arranged at intervals in the vertical direction. The untwisting pipes 41a and 41b are substantially cylindrical members extending in the front-rear direction, and open at the front end (front end). Further, a suction source (not shown) is connected to the base end portions (rear end portions) of the untwisting pipes 41a and 41b, and the yarn ends of the yarns Y1 and Y2 can be sucked from the front end openings, respectively. It is like that. Moreover, the injection hole 42 for injecting compressed air is opened in the inner wall face of the untwisting pipe 41a, 41b. When a compressed air flow is injected from the injection hole 42, a swirling air flow is generated in the untwisting pipes 41a and 41b. Thereby, in the untwisting part 31, the yarn end of the yarn Y1 introduced into the untwisted pipe 41a and the yarn end of the yarn Y2 introduced into the untwisted pipe 41b as described later Can be untwisted.

  The twisted portion 32 is used to join the yarn Y1 and the yarn Y2 by twisting the yarn end of the yarn Y1 untwisted by the untwisting portion 31 and the yarn end of the yarn Y2. The twisting portion 32 includes a twisting nozzle 46. The twisting nozzle 46 is positioned in front of the untwisting pipes 41a and 41b in the front-rear direction, and is positioned between the untwisting pipe 41a and the untwisting pipe 41b in the vertical direction. The twisting nozzle 46 is formed in a cylindrical shape extending in the vertical direction. Further, the front end portion of the twisting nozzle 46 is opened over the entire length in the vertical direction, and the yarn Y1 and the yarn Y2 can be introduced from the front. Then, the yarns Y1 and Y2 guided to the yarn joining device 21 by the yarn catching guide member 23 and the yarn catching guide member 24 are introduced into the twisting nozzle 46 from the opening at the front end portion.

  Further, an injection hole 47 capable of injecting compressed air is opened on the inner wall surface of the twisting nozzle 46. When compressed air is injected from the injection hole 47, a swirling air flow is generated in the twisting nozzle 46. Thereby, in twisting part 32, after untwisting in untwisting part 31, as mentioned below, the yarn end of yarn Y1 introduced into twisting nozzle 46 and the yarn end of yarn Y2 are the above-mentioned. The yarn can be spun together by a swirling air flow.

  As shown in FIGS. 3A to 3C, 4, and 5, the upper guide plate 33 is disposed above the untwisting portion 31 and the yarn joining portion 32. The upper guide plate 33 is formed with a guide groove 51a for introducing the yarn Y1 and a guide groove 52a for introducing the yarn Y2. The guide grooves 51a and 52a extend in the front-rear direction, and the upper and lower ends and the front end are open. Further, the guide groove 51a and the guide groove 52a are arranged with a space in the left-right direction. When the yarns Y1 and Y2 are guided to the yarn joining device 21 by the yarn catching guide member 23 and the yarn catching guide member 24, the yarn Y1 is introduced into the guide groove 51a from the opening at the front end, and the yarn Y2 is opened at the front end. To the guide groove 52a.

  The upper guide plate 33 is provided with a cutter 53a and a clamp mechanism 54a. The cutter 53 a is provided for the guide groove 51 a and has a fixed piece 55 and a movable piece 56. Then, the cutter 53a cuts the yarn Y1 with the fixed piece 55 and the movable piece 56 sandwiching the yarn Y1 as will be described later. The cutter 53a is a so-called clamp cutter that can grip the yarn Y1 even after the yarn Y1 is cut.

  The clamp mechanism 54 a is provided with respect to the guide groove 52 a and includes a fixed piece 57 and a movable piece 58. The clamp mechanism 54a holds the thread Y2 with the fixed piece 57 and the movable piece 58 as will be described later.

  The lower guide plate 34 is disposed below the untwisting portion 31 and the yarn joining portion 32. The lower guide plate 34 is formed with a guide groove 51b into which the yarn Y1 is introduced and a guide groove 52b into which the yarn Y2 is introduced. The guide grooves 51b and 52b are located almost directly below the guide grooves 51a and 52a, respectively. The guide grooves 51b and 52b extend in the front-rear direction, and the upper and lower ends and the front end are open. When the yarns Y1 and Y2 are guided to the yarn joining device 21 by the yarn catching guide member 23 and the yarn catching guide member 24, the yarn Y1 is introduced into the guide groove 51b from the opening at the front end, and the yarn Y2 is opened at the front end. To the guide groove 52b.

  The lower guide plate 34 is provided with a cutter 53b and a clamp mechanism 54b. The cutter 53b is provided for the guide groove 52a. The cutter 53b is a clamp cutter having a fixed piece 55 and a movable piece 56, similar to the cutter 53a. The cutter 53b then cuts the yarn Y2 with the fixed piece 55 and the movable piece 56 sandwiching the yarn Y2 as will be described later. The clamp mechanism 54b is provided for the guide groove 51b.

  The clamp mechanism 54b has a fixed piece 57 and a movable piece 58 similar to the clamp mechanism 54a. The clamp mechanism 54b holds the thread Y2 with the fixed piece 57 and the movable piece 58 interposed therebetween.

  The yarn shifting lever 35a is located between the untwisting pipe 41a and the upper guide plate 33 in the vertical direction. The yarn shifting lever 35b is located between the untwisting pipe 41b and the lower guide plate 34 in the vertical direction. The yarn gathering lever 35a and the yarn gathering lever 35b are integrally formed and moved rearward as will be described later, so that the yarn gathering guide members 23 and 24 guide the yarns Y1 and Y2 guided to the yarn joining device 21. Pressed. The yarns Y1 and Y2 pressed by the yarn gathering levers 35a and 35b are bent.

  The anti-twist guide 36a is positioned between the upper guide plate 33 and the twisting nozzle 46 in the vertical direction. The twist prevention guide 36 b is located between the lower guide plate 34 and the twisting nozzle 46 in the vertical direction. The anti-twist guide 36a and the anti-twist guide 36b are integrally formed. The twist prevention guides 36a and 36b are connected to the yarn shifting levers 35a and 35b, and are movable together with the yarn shifting levers 35a and 35b. However, the yarn joining device 21 is provided with a stopper (not shown) that restricts the movement of the anti-twisting guides 36a and 36b, and in the state where the movement of the anti-twisting guides 36a and 36b is restricted by the stopper, the yarn shifting lever Even if 35a and 35b move, the anti-twist guides 36a and 36b do not move. When the yarn end of the yarn Y1 and the yarn end of the yarn Y2 are twisted together by the twisting portion 32, the twist prevention guide 36a contacts the yarn Y2, and the twist prevention guide 36b contacts the yarn Y1. This prevents the twist from being transmitted to the upper part of the yarn Y2 than the anti-twist guide 36a and the lower part of the yarn Y1 than the anti-twist guide 36b.

<Thread joining operation>
Next, the yarn joining operation in which the yarn joining device 21 joins the yarn Y1 and the yarn Y2 will be described. As described above, when the yarn Y1 and the yarn Y2 are guided to the yarn joining device 21 by the yarn catching guide member 23 and the yarn catching guide member 24, the yarn Y1 is introduced into the twisting nozzle 46 and the guide grooves 51a and 52a. The yarn Y2 is introduced into the twisting nozzle 46 and the guide grooves 51b and 52b. In this state, the yarn splicing device 21 moves the yarn shifting levers 35a and 35b rearward and presses them against the yarns Y1 and Y2, thereby bringing the upper guide plates of the yarns Y1 and Y2 into an upper guide plate as shown in FIG. The part between 33 and the twisting nozzle 46 and the part between the lower guide plate 34 and the twisting nozzle 46 are bent. At this time, the greater the amount of movement of the yarn shifting levers 35a and 35b, the more the yarns Y1 and Y2 are bent, and the portions of the yarns Y1 and Y2 between the upper guide plate 33 and the twisting nozzle 46 and the lower The length of the part between the side guide plate 34 and the twisting nozzle 46 becomes long.

  Subsequently, after the clamp mechanism 54b grips the yarn Y1 introduced into the guide groove 51b, the cutter 53a causes the yarn Y1 introduced into the guide groove 51a to be cut. At the same time, the clamp mechanism 54a grips the yarn Y2 introduced into the guide groove 52a, and then causes the cutter 53b to cut the yarn Y2 introduced into the guide groove 52b. Then, as shown in FIG. 3B, the yarn end of the cut yarn Y1 is sucked into the untwisting pipe 41a and introduced into the untwisting pipe 41a, and the yarn end of the cut yarn Y2 is unwound. By being sucked into the twisted pipe 41b, it is introduced into the untwisted pipe 41b.

  Here, when a yarn defect is detected by the yarn clearer 22 and the yarn Y is cut by the cutter 22a, the yarn defect remains in the yarn Y2. At this time, the yarn Y2 is cut by the cutter 53b, so that the yarn Y2 is cut. The remaining yarn defects are removed.

  Subsequently, the compressed air is injected from the injection holes 42 of the untwisting pipes 41a and 41b to generate a swirling air flow in the untwisting pipes 41a and 41b, whereby the yarns Y1 and Y2 in the untwisting pipes 41a and 41b. Untwist the end of the yarn.

  Subsequently, the yarn shifting levers 35a and 35b are further moved rearward. Then, as shown in FIG. 3C, the yarn ends of the untwisted yarns Y1 and Y2 are drawn out from the untwisted pipes 41a and 41b and further introduced into the twisting nozzle 46. Then, with the yarn ends of the untwisted yarns Y1 and Y2 being introduced into the twisting nozzle 46, compressed air is injected from the injection holes 47 to generate a swirling air flow in the twisting nozzle 46. The yarn end of the untwisted yarn Y1 and the yarn end of the yarn Y2 are twisted together to join the yarn Y1 and the yarn Y2. At this time, the twist guides 36a and 36b are in contact with the yarns Y1 and Y2, and a portion below the twist guide 36b of the yarn Y1 and a portion above the twist guide 36a of the yarn Y2. It is prevented that the twist is transmitted to the wire. Then, after the yarn splicing is completed, the yarn shifting levers 35a and 35b and the twisting stop guides 36a and 36b are returned to the initial positions away from the yarn Y, and the winding in the winding unit 13 is resumed.

<Drive mechanism>
Next, the drive mechanism 100 for driving the cutters 53a and 53b, the clamp mechanisms 54a and 54b, and the yarn shifting levers 35a and 35b of the yarn joining device 21 will be described. As shown in FIGS. 4 to 6, the drive mechanism 100 includes a stepping motor 101, timing pulleys 102 and 103, a timing belt 104, a shaft 105, a first cam mechanism 106 and a second cam mechanism 107.

  The stepping motor 101 is provided at the rear end portion of the yarn splicing device 21, and the rotation shaft 101a extends in the vertical direction. Further, the tip end portion of the rotation shaft 101 a of the stepping motor 101 is positioned at the upper end portion of the yarn joining device 21. The timing pulley 102 is attached to the rotating shaft 101 a of the stepping motor 101. The timing pulley 103 is located in front of the timing pulley 102. The timing belt 104 is formed in an endless shape and is wound around the timing pulleys 102 and 103. The shaft 105 extends in the vertical direction, and an upper end portion thereof is attached to the timing pulley 103. Thereby, when the stepping motor 101 is driven, the power is transmitted to the shaft 105 via the timing pulley 102, the timing belt 104, and the timing pulley 103, and the shaft 105 rotates.

  The first cam mechanism 106 is for transmitting power to the yarn shifting levers 35a and 35b and the twist prevention guides 36a and 36b. The first cam mechanism 106 includes a first rotating cam 111, a first cam follower 112, and arms 113 and 114.

  The first rotating cam 111 is a plate-shaped cam, and an outer peripheral surface thereof is a cam surface 111 a that contacts the first cam follower 112. The first rotating cam 111 is attached to the shaft 105 and rotates integrally with the shaft 105. The yarn joining device 21 is in a predetermined initial state when yarn joining is not performed in the yarn joining device 21, such as during winding by the winding unit 13, and at this time, the first rotating cam 111 is configured as shown in FIG. It is located at the origin position shown in (a). At this time, the cam surface 111a is in contact with the first cam follower 112 at the contact point 99a. When the first rotating cam 111 of the cam surface 111a is rotated clockwise at an angle within 180 ° from the origin position (hereinafter referred to as “first direction”), A portion in contact with the one cam follower 112 is a first cam surface 111a1. When the first rotating cam 111 of the cam surface 111a is rotated in the counterclockwise direction (hereinafter referred to as “second direction”) viewed from above at an angle within 180 ° from the origin position, A portion in contact with the cam follower 112 is a second cam surface 111a2.

  As shown in FIG. 7A, the first cam surface 111a1 and the second cam surface 111a2 are substantially symmetrical with respect to a straight line L1 that connects the rotation axis 105a of the shaft 105 and the contact point 99a when viewed from above. Although it has a shape, the shape is not symmetrical in part. More specifically, the first cam surface 111a1 includes a contact point 99b that comes into contact with the first cam follower 112 when the first rotating cam 111 is rotated in the first direction by an angle θ from the origin position. In a part of the cam surface 111a1 that is continuous in the circumferential direction, the distance between the shaft 105 and the rotating shaft 105a is a distance D1. In contrast, the second cam surface 111a2 includes a contact point 99c that contacts the first cam follower 112 when the first rotating cam 111 is rotated in the second direction by a predetermined angle θ from the origin position. In a part of the cam surface 111a2 that is continuous in the circumferential direction, the distance between the shaft 105 and the rotating shaft 105a is a distance D2 that is smaller than the distance D1. Here, the distances D1 and D2 are both smaller than the distance D0 (the “reference distance” in the present invention) between the rotating shaft 105a and the contact point 99a. The cam surface 111a is the same as that described in, for example, Japanese Patent Application Laid-Open No. 2013-067465 except that there is a difference between the distance D1 and the distance D2 as described above. Further detailed description of the shape of the cam surface 111a will be omitted. In the present embodiment, the angle θ corresponds to the “first angle” and the “second angle” of the present invention, and the first angle and the second angle are the same size. Further, in FIG. 7A, for reference, unlike the present embodiment, the second cam surface 111a2 when the second cam surface 111a2 is symmetrical to the first cam surface 111a1 with respect to the straight line L1. The position is indicated by a broken line.

  The first cam follower 112 is located behind the first rotating cam 111 and is in contact with the cam surface 111 a of the first rotating cam 111. When the first rotating cam 111 rotates, the first cam follower 112 moves while being guided by the cam surface 111a. The arm 113 extends along the left-right direction, and a first cam follower 112 is attached to the center of the arm 113. Further, the arm 113 is rotatably supported by a shaft 108 extending in the vertical direction at the left end portion thereof. A torsion coil spring 109 is attached to the shaft 108, and one end of the torsion coil spring 109 is attached to the arm 113. Thus, the arm 113 is urged clockwise by the torsion coil spring 109 around the shaft 108 as viewed from above. As a result, the first cam follower 112 is pressed against the cam surface 111 a of the first rotating cam 111.

  The arm 114 is rotatably connected to the right end portion of the arm 113 via a shaft 114a extending in the vertical direction. The arm 114 extends forward from a connecting portion with the arm 113, and is supported so as to be rotatable around a shaft 114b extending in the vertical direction in the vicinity of the front end thereof. An integrally formed yarn shifting lever 35a, 35b is connected to the front end portion of the arm 114.

  The second cam mechanism 107 is for transmitting power to the movable pieces 56 of the cutters 53a and 53b and the movable pieces 58 of the clamp mechanisms 54a and 54b. The second cam mechanism 107 includes a second rotating cam 121, a second cam follower 122, a rotating member 123, and arms 124 and 125.

  The second rotating cam 121 is a plate-shaped cam, and the outer peripheral surface thereof is a cam surface 121 a that contacts the second cam follower 122. The second rotating cam 121 is attached to the shaft 105 and rotates integrally with the shaft 105 and the first rotating cam 111. The second rotary cam 121 is located at the origin position shown in FIGS. 6B and 6C when the yarn joining device 21 is in the initial state. At this time, the cam surface 121a is in contact with The point 98a is in contact with the second cam follower 122.

  As shown in FIG. 7B, the cam surface 121a is in contact with the second cam follower 122 when the second rotating cam 121 is rotated in the first direction at a rotation angle within 180 ° from the origin position; A portion that contacts the second cam follower 122 when rotated in the second rotation direction at a rotation angle within 180 ° is symmetric with respect to a straight line L2 connecting the rotation shaft 105a and the contact point 98a when viewed from above. It has a shape. The specific shape of the cam surface 121a is, for example, in contact with the second cam follower 122 when the second rotating cam 121 of the cam surface 121a is rotated in the second direction at a rotation angle within 180 ° from the origin position. The shape of the portion to be made is the same shape as the portion that comes into contact with the cam follower when rotated in the direction corresponding to the second direction, among the cam surfaces of the cam described in JP2013-0667465A. Yes.

  Moreover, the 2nd rotation cam 121 has the protrusion part 121b which protruded below rather than the part for forming the cam surface 121a. Three magnets 119a to 119c are embedded in the protruding portion 121b. The three magnets 119a to 119c are arranged in this order along the circumferential direction of the second rotating cam 121, and the magnets 119a and 119c are arranged in such an orientation that the upper end is an N pole and the lower end is an S pole. 119b is arranged in such an orientation that the upper end is the S pole and the lower end is the N pole. Or, conversely, the magnets 119a and 119c are arranged in such an orientation that the upper end is the S pole and the lower end is the N pole, and the magnet 119b is the orientation in which the upper end is the N pole and the lower end is the S pole. May be arranged. Correspondingly, the yarn joining device 21 is provided with a magnetic sensor 155 (see FIG. 13) for detecting the direction of the magnetic field by the magnets 119a to 119c. The magnetic sensor 155 is disposed so as to overlap with the center magnet 119b when the rotary cams 111 and 121 are located at the origin positions. Thereby, as will be described later, based on the direction of the magnetic field detected by the magnetic sensor 155, the rotating cams 111 and 121 can be positioned at the origin position.

  The second cam follower 122 is located on the left side of the second rotating cam 121 and is in contact with the cam surface 121 a of the second rotating cam 121. When the second rotating cam 121 rotates, the second cam follower 122 moves while being guided by the cam surface 121a.

  The rotating member 123 is rotatably supported on the shaft 108. Further, the other end portion of the torsion coil spring 109 is attached to the rotating member 123. The rotating member 123 is urged by the torsion coil spring 109 in the counterclockwise direction with the shaft 108 as the center as viewed from above. The rotating member 123 includes three arm portions 123a, 123b, and 123c. The arm portion 123a and the arm portion 123b are located at the lower end portion of the rotating member 123 and extend separately from the portion supported by the shaft 108 in two horizontal directions. The 2nd cam follower 122 is attached to the front-end | tip part of the arm part 123a. Then, as described above, the rotating member 123 is biased by the torsion coil spring 109, whereby the second cam follower 122 is pressed against the cam surface 121 a of the second rotating cam 121.

  An arm 124 is rotatably connected to the distal end portion of the arm portion 123b via a shaft 124a extending in the vertical direction. The arm 124 extends forward from the connecting portion with the arm portion 123b. Further, a bent portion 124b bent to the left side is provided in the middle portion of the arm 124.

  Here, the fixing piece 57 of the clamp mechanism 54b is located on the lower surface of the lower guide plate 34 between the guide groove 51b and the guide groove 52b. On the other hand, in the initial state, the movable piece 58 of the clamp mechanism 54b is located at a position shifted to the left side from the fixed piece 57 just below the lower guide plate 34. Further, a shaft 34a extending in the vertical direction is provided on the lower surface of the lower guide plate 34, and a central portion in the left-right direction of the movable piece 58 of the clamp mechanism 54b is rotatably supported by the shaft 34a. Further, a torsion coil spring 130 is attached to the shaft 34a, and both end portions of the torsion coil spring 130 are attached to the lower guide plate 34 and the distal end portion of the movable piece 58, respectively. Thereby, the movable piece 58 is urged counterclockwise by the torsion coil spring 130 as viewed from above around the shaft 34a. Further, a contact portion 58a is provided at the rear end portion of the movable piece 58 of the clamp mechanism 54b. In the initial state, the contact portion 58a of the clamp mechanism 54b is in contact with the bent portion 124b of the arm 124, and the rotation of the movable piece 58 due to the biasing force of the torsion coil spring 130 is restricted.

  The movable piece 56 of the cutter 53b is rotatably connected to the upper surface of the distal end portion of the arm 124 via a shaft 124c extending in the vertical direction. Here, the fixing piece 55 of the cutter 53b is located in a portion between the guide groove 51b and the guide groove 52b on the upper surface of the lower guide plate 34. On the other hand, the movable piece 56 is positioned at a position where the tip thereof is shifted rightward from the fixed piece 55 just above the lower guide plate 34. Further, a shaft 34 b extending in the vertical direction is provided on the upper surface of the lower guide plate 34. The central part of the movable piece 56 is rotatably supported by the shaft 34b. The fixed piece 55 has a rear end portion fixed to the shaft 34b.

  The arm portion 123 c is located at the upper end portion of the rotating member 123. The arm part 123c has substantially the same shape as the arm part 123b, and extends in parallel with the arm part 123b. An arm 125 having a structure similar to that of the arm 124 is coupled to the distal end portion of the arm portion 123c so as to be rotatable about a shaft 125a extending in the vertical direction.

  Here, the fixed piece 57 and the movable piece of the clamp mechanism 54a are arranged on the upper surface of the upper guide plate 33 by the same structure as the fixed piece 57 and the movable piece of the clamp mechanism 54b are attached to the lower face of the lower guide plate 34. A piece 58 is attached (not shown). Further, the fixed piece 55 and the movable piece of the cutter 53a are arranged on the lower surface of the upper guide plate 33 by the same structure as the fixed piece 55 and the movable piece 56 of the cutter 53b are attached to the upper surface of the lower guide plate 34. 56 is attached (not shown). Then, similarly to the arm 124, the arm 125 regulates the rotation of the movable piece 58 by contacting the contact portion 58a of the movable piece 58 of the clamp mechanism 54a in the initial state. Further, similarly to the arm 124, the arm 125 is rotatably connected to the distal end portion of the cutter 53a via a shaft extending in the vertical direction.

<Operations of the thread clamp lever, cutter and clamp mechanism>
Next, operations of the yarn shifting levers 35a and 35b, the twist guides 36a and 36b, the cutters 53a and 53b, and the clamp mechanisms 54a and 54b when the stepping motor 101 is driven will be described.

  In the yarn joining device 21, in the initial state, as shown in FIG. 6A, the yarn shifting levers 35 a and 35 b and the twist prevention guides 36 a and 36 b are located at positions away from the untwisting portion 31 and the twisting portion 32. doing. In the initial state, the clamp mechanism 54a, 54b has the movable piece 58 separated from the fixed piece 57, and the guide grooves 51b, 52a are respectively provided between the fixed piece 57 and the movable piece 58 as viewed from above. Is located. In the cutters 53a and 53b, the movable piece 56 is separated from the fixed piece 55, and the guide grooves 51a and 52b are located between the fixed piece 55 and the movable piece 56, respectively, as viewed from above.

  In the yarn joining device 21, the yarn catching guide members 23 and 24 introduce the yarn Y1 into the guide grooves 51a and 51b, the yarn Y2 into the guide grooves 52a and 52b, respectively, and the yarns Y1 and Y2 are twisted. After being introduced into the nozzle 46, the stepping motor 101 is driven to rotate the shaft 105 in the first direction or the second direction from the initial state.

  A case where the shaft 105 is rotated in the first direction will be described. When the shaft 105 is rotated by the angle θ in the first direction, the first cam follower 112 is moved by being guided by the first cam surface 111a of the rotating first rotating cam 111 as shown in FIG. To do. As a result, the arm 114 rotates clockwise around the shaft 108 as viewed from above, and the shaft 114a moves forward. As the shaft 114a moves forward, the arm 114 rotates clockwise around the shaft 114b as viewed from above, and the yarn shifting levers 35a and 35b and the anti-twisting guide 36a attached to the tip of the shaft 114b. , 36b rotate in the clockwise direction when viewed from above, and these tip end portions move backward. As a result, the yarn shifting levers 35a and 35b are pressed against the yarns Y1 and Y2, and the yarns Y1 and Y2 are bent. Also, at this time, the yarn Y1 by the yarn gathering levers 35a and 35b from when the yarn gathering levers 35a and 35b start to contact the yarns Y1 and Y2 until the first rotating cam 111 rotates by an angle slightly smaller than the angle θ. , Y2 is increased in bending, and then the bending magnitudes of the yarns Y1, Y2 are kept constant until the first rotating cam 111 rotates by an angle θ. The position of the yarn shifting levers 35a and 35b shown in FIG. 8A when the first first rotating cam 111 is rotated in the first direction by the angle θ from the origin position is the “first solution” of the present invention. Corresponds to “twisting position”.

  When the shaft 105 is rotated by the angle θ in the first direction, the second cam follower 122 is guided to the cam surface 121a of the rotating second rotating cam 121 as shown in FIGS. 8B and 8C. Move. As a result, the pivot member 123 pivots clockwise around the shaft 108 as viewed from above, so that the arms 124 and 125 connected to the arm portions 123b and 123c move rearward.

  When the arm 124 moves rearward, as shown in FIG. 8B, the bent portion 124 b is separated from the contact portion 58 a of the movable piece 58 of the clamp mechanism 54 a, and the movable piece 58 is shafted by the biasing force of the torsion coil spring 130. It rotates about 34a, contacts the fixed piece 57, and holds the yarn Y1 in the guide groove 51b. Further, when the arm 124 moves rearward, as shown in FIG. 8C, the movable piece 56 of the cutter 53b rotates clockwise around the shaft 34b to approach the fixed piece 55. . Thereby, the yarn Y2 in the guide groove 52b is cut by the cutter 53b. As described above, since the cutter 53b is a clamp cutter, after cutting the yarn Y2, the cutter 53b grips the yarn end of the cut yarn Y2.

  At this time, the arm portion 123c and the arm 125 move in the same manner as the arm portion 123b and the arm 124, respectively. As a result, the movable piece 58 of the clamp mechanism 54a comes into contact with the fixed piece 57, thereby gripping the yarn Y2 in the guide groove 52a. Further, when the movable piece 56 of the cutter 53a approaches the fixed piece, the yarn Y1 in the guide groove 51a is cut by the cutter 53a, and the yarn end of the cut yarn Y1 is gripped by the cutter 53a.

  When the shaft 105 is further rotated in the first direction after the yarns Y1 and Y2 are cut, the second rotating cam 121 rotates. As shown in FIG. 9B, the contact portion 58a is a bent portion. The state apart from 124b is maintained, and the state where the movable piece 58 of the clamp mechanism 54b is in contact with the fixed piece 57 is maintained. The same applies to the clamp mechanism 54a.

  On the other hand, in the cutter 53b, even if the second rotary cam 121 rotates after the yarn Y2 is cut, the state where the yarn Y1 is gripped by the fixed piece 55 and the movable piece 56 is maintained for a while. As shown in (c), the movable piece 56 is separated from the fixed piece 55 and the gripping of the yarn Y1 is released. The same applies to the cutter 53a. Then, when the holding of the yarns Y1 and Y2 by the cutters 53a and 53b is released, the yarn ends of the yarns Y1 and Y2 are introduced into the untwisting pipes 41a and 41b as described above. The yarn ends of the yarns Y1 and Y2 are untwisted by the swirling air flow generated in the untwisting pipes 41a and 41b by the compressed air injected from the injection holes 42.

  Here, unlike the present embodiment, if the yarns Y1 and Y2 cut by the cutters 53a and 53b are not gripped and are immediately removed from the cutters 53a and 53b, the yarns Y1 and Y2 are highly elastic yarns. In some cases, the yarn ends of the yarns Y1 and Y2 move to a position away from the untwisting pipes 41a and 41b, and the yarns Y1 and Y2 may not be introduced into the untwisting pipes 41a and 41b. Therefore, in this embodiment, the cutters 53a and 53b are used as clamp cutters, and after the yarns Y1 and Y2 are cut, the yarn ends of the cut yarns Y1 and Y2 are held. As a result, after the yarns Y1 and Y2 are cut, the portions near the yarn ends of the yarns Y1 and Y2 are sucked by the untwisting pipes 41a and 41b, and then the yarn ends of the yarns Y1 and Y2 are separated from the cutters 53a and 53b. Thus, the yarns Y1 and Y2 can be reliably introduced into the untwisting pipes 41a and 41b.

  When the shaft 105 is further rotated in the first direction after the yarn ends of the yarns Y1 and Y2 are untwisted, the rotation of the first first rotation cam 111 causes the yarn shifting lever 35a, 35b and the anti-twist guides 36a and 36b further move backward. Thereby, as mentioned above, the yarn ends of the yarns Y1 and Y2 are drawn out from the untwisting pipes 41a and 41b and introduced into the twisting nozzle 46. However, at this time, the movement of the anti-twisting guides 36a and 36b is stopped halfway by a stopper (not shown), and thereafter only the yarn shifting levers 35a and 35b move. The yarn end of the yarn Y1 introduced into the twisting nozzle 46 and the yarn end of the yarn Y2 are, as described above, the swirling air flow generated in the twisting nozzle 46 by the compressed air injected from the injection hole 47. The yarns Y1 and Y2 are spliced together.

  During this time, as shown in FIG. 9B, the state in which the movable piece 58 of the clamp mechanism 54b is in contact with the fixed piece 57 is maintained. The same applies to the clamp mechanism 54a. Moreover, as shown in FIG.9 (c), the state which the fixed piece 55 and the movable piece 56 of the cutter 53b left | separated is maintained. The same applies to the cutter 53a.

  Next, the case where the shaft 105 is rotated in the second direction will be described. When the shaft 105 is rotated in the second direction by an angle θ, the first cam follower 112 is moved by being guided by the second cam surface 111a2 of the rotating first rotating cam 111 as shown in FIG. As described above, the yarn shifting levers 35a and 35b and the twist prevention guides 36a and 36b move, the yarn shifting levers 35a and 35b are pressed against the yarns Y1 and Y2, and the yarns Y1 and Y2 are bent. The position of the yarn shifting levers 35a and 35b when the second rotary cam 121 shown in FIG. 10A is rotated in the second direction by an angle θ from the origin position is the “second untwisting position” of the present invention. Is equivalent to. For reference, FIG. 10 (a) shows the position of the yarn shifting lever 35a in the state of FIG. 8 (a) with a broken line.

  When the second rotating cam 121 is rotated in the second direction by the angle θ by the rotation of the shaft 105, as shown in FIGS. 10B and 10C, as in the case where the second rotating cam 121 is rotated in the first direction by the angle θ. In this manner, the movable piece 58 of the clamp mechanism 54b and the movable piece 56 of the cutter 53b move. Thereby, the thread Y2 in the guide groove 51b is gripped by the clamp mechanism 54b, and the thread Y2 in the guide groove 52b is cut by the cutter 53b. The same applies to the clamp mechanism 54a and the cutter 53a.

  As described above, when the yarns Y1 and Y2 are cut and then the cutters 53a and 53b release the yarns Y1 and Y2, the yarn ends of the yarns Y1 and Y2 are untwisted pipes 41a and 41b. The yarn ends of the yarns Y1 and Y2 are untwisted. However, in the present embodiment, as described above, since the distance D2 is smaller than the distance D1 in the first rotating cam 111, the difference [D0−D2] between the distance D2 and the distance D0 is the distance D0 of the distance D1. And the difference [D0−D1]. Therefore, when the first rotating cam 111 is rotated from the origin position by the angle θ in the second direction, the yarn shifting levers 35a and 35b are more rearward than when the first rotation cam 111 is rotated from the origin position by the angle θ in the first direction. The yarns Y1 and Y2 are greatly bent.

  Here, the length of the yarn end of the yarn Y1 introduced into the untwisting pipe 41a becomes longer as the length of the portion of the yarn Y1 located between the twisting nozzle 46 and the cutter 53a is longer. Moreover, the length of the said part of the thread | yarn Y1 becomes so long that the thread | yarn Y1 is largely bent by the yarn shifting levers 35a and 35b. Similarly, the length of the yarn end of the yarn Y2 introduced into the untwisting pipe 41b becomes longer as the length of the portion of the yarn Y2 located between the twisting nozzle 46 and the cutter 53b is longer. Further, the longer the yarn Y2 is bent by the yarn shifting levers 35a and 35b, the longer the length of the portion of the yarn Y2 after being cut by the cutter 53b. Therefore, in the present embodiment, as shown in FIG. 11B, when the first rotating cam 111 is rotated in the second direction by an angle θ, the yarn Y1 introduced into the untwisting pipes 41a and 41b, When the Y2 yarn end length Ly2 (the “second length” in the present invention) is rotated by the angle θ in the first direction as shown in FIG. 11A, respectively. In addition, the yarn end length of the yarns Y1 and Y2 introduced into the untwisting pipes 41a and 41b is longer than the length Ly1 (the “first length” in the present invention).

  Then, after the yarn ends of the yarns Y1 and Y2 are untwisted, when the shaft 105 is further rotated in the first direction, as shown above, the yarn shifting levers 35a and 35b are moved backward as shown in FIG. The yarn ends of the yarns Y1 and Y2 are pulled out from the untwisting pipes 41a and 41b and introduced into the twisting nozzle 46. In the same manner as described above, the swirling air generated in the twisting nozzle 46 by the compressed air ejected from the ejection hole 47 between the yarn end of the yarn Y1 and the yarn end of the yarn Y2 introduced into the twisting nozzle 46. The yarns Y1 and Y2 are spliced together by the flow. The positions of the yarn shifting levers 35a and 35b shown in FIGS. 9 (a) and 12 (a) correspond to the “twisting position” of the present invention.

  Also at this time, as described above, during this time, the state in which the movable piece 58 of the clamp mechanism 54b is in contact with the fixed piece 57 is maintained as shown in FIG. The same applies to the clamp mechanism 54a. Moreover, as shown in FIG.12 (c), the state which the fixed piece 55 and the movable piece 56 of the cutter 53b left | separated is maintained. The same applies to the cutter 53a.

<Electric configuration of automatic winder>
Next, the electrical configuration of the automatic winder 1 will be described. As shown in FIG. 13, in the automatic winder 1, a unit control device 150 is provided for each winding unit 2, and the unit control device 150 includes a cylinder drive motor 151, a drum motor 152, and a yarn clearer 22. Cutter 22a, turning motors 153, 154, stepping motor 101, untwisting section 31 (suction of yarns Y1, Y2 in untwisting pipes 41a, 41b, injection of compressed air from injection holes 42, etc.), twisting section 32 (injection) The operation of the compressed air from the hole 47 is controlled. Further, the unit controller 150 receives signals indicating detection results of the yarn feeler 19, the yarn clearer 22, and the magnetic sensor 155. In FIG. 13, for the sake of convenience, only the unit control device 150 of one winding unit 2 is illustrated with its control target, etc., and other unit control devices 150 are not illustrated with their control target. doing.

  The unit control devices 150 of the plurality of winding units 2 are connected to the machine base control device 4, and their operations are controlled by the machine base control device 4. Further, in the automatic winder 1, before starting winding in the winding unit 2, by operating an operation panel (not shown) of the machine control device 4, the yarn Y wound by the winding unit 13 of the winding unit 2 is illustrated. Type information ("information relating to the core ratio of the yarn" of the present invention) can be input. At this time, information on the type of the common yarn Y may be input to the plurality of winding units 2 at once, or the yarn Y may be individually input to each winding unit 2. It may be possible to input information of a type. Here, the stretchable yarn is composed of an exterior yarn with less stretch that is made of cotton or synthetic fiber spun yarn, and a synthetic fiber such as highly stretchable polyurethane. The ratio of the cross-sectional area of only the synthetic fiber to the cross-sectional area of the whole yarn composed of natural fibers and synthetic fibers is called the core ratio. Further, when tension is applied to the yarn, the core area changes because the cross-sectional area of the synthetic fiber is reduced. Therefore, the core ratio of the present invention is a ratio in a state where no tension is applied to the yarn.

<Control during yarn splicing>
Next, the control of the unit control device 150 when the yarn joining device 21 performs yarn joining in each winding unit 2 will be described. When the yarn joining is performed by the yarn joining device 21, the unit control device 150 performs processing along the flow of FIG. Here, the flow of FIG. 14 shows that when the yarn defect is detected by the yarn clearer 22, and when the yarn breaks during the winding of the package or the yarn in the yarn feeding bobbin B is lost, the yarn feeler 19 Started when Y is no longer detected.

  14 will be described in detail. First, the unit controller 150 controls the turning motors 153 and 154 to guide the yarn Y1 and the yarn Y2 to the yarn catching guide members 23 and 24 to the yarn joining device 21. The guide grooves 51a, 51b, 52a, 52b and the twisting nozzle 46 are introduced (S101). Subsequently, the unit controller 150 determines whether or not the core ratio Ry of the yarn Y is less than the predetermined value R0 (S102). The core ratio Ry of the yarn Y is determined by the type of the yarn Y, and in S102, the above determination is made based on the information on the type of the yarn Y input from the machine control device 4 before the start of winding.

  If the core ratio Ry of the yarn Y is less than the predetermined value R0 (S102: YES), the unit controller 150 sets the rotation direction of the shaft 105 to the first direction (S103), and proceeds to S105. On the other hand, when the core ratio Ry of the yarn Y is equal to or greater than the predetermined value R0 (S102: NO), the unit controller 150 sets the rotation direction of the shaft 105 to the second direction (S104), and proceeds to S105.

  After setting the rotation direction of the shaft 105 in S103 or S104, the unit control device 150 subsequently controls the stepping motor 101, the untwisting unit 31, and the like to untwist the yarn ends of the yarns Y1 and Y2 ( S105). At this time, the unit controller 150 controls the stepping motor 101 so as to rotate the shaft 105 in the direction set in S103 or S104. The operation of the yarn joining device 21 at this time is as described above.

  After untwisting the yarn ends of the yarns Y1 and Y2, the unit controller 150 subsequently controls the stepping motor 101, the twisting unit 32, etc., and the yarn ends of the untwisted yarn Y1 and yarn Y2 Are spun together to join the yarn Y1 and the yarn Y2 (S106). Also at this time, the unit controller 150 controls the stepping motor 101 so as to rotate the shaft 105 in the direction set in S103 or S104. The operation of the yarn joining device 21 at this time is also as described above.

  Then, after the yarn joining is completed, the unit controller 150 subsequently controls the stepping motor 101 to rotate the shaft 105 in the direction opposite to that set in S103 or S104, thereby causing the yarn joining device 21 to be rotated. The initial state is restored (S107). At this time, when the direction of the magnetic force detected by the magnetic sensor 155 is switched twice, that is, the magnetic force in the direction emitted from the magnet 119a or 119c is detected, and then the magnetic force in the direction emitted from the magnet 119b is detected. The rotation of the stepping motor 101 is stopped.

  According to the embodiment described above, at the time of yarn joining by the yarn joining device 21, it is introduced into the untwisting pipes 41a and 41b depending on whether the first rotating cam 111 is rotated in the first direction or the second direction. The lengths of the yarn ends of the yarns Y1 and Y2 can be made different. As a result, the yarns Y1 and Y2 can be moved to the untwisting pipes 41a and 41b by an appropriate length according to the type of the yarn Y only by changing the rotation direction of the first rotating cam 111 without performing complicated adjustments. Can be introduced.

  In the present embodiment, when the core ratio Ry of the yarn Y is less than the predetermined value R0, the rotation direction of the first rotating cam 111 at the time of yarn joining is set to the first direction, and the untwisting pipe 41a, The lengths of the yarn ends of the yarns Y1 and Y2 introduced into 41b are shortened. On the other hand, when the core ratio Ry is equal to or greater than the predetermined value R0, the yarn Y is introduced into the untwisting pipes 41a and 41b by setting the rotation direction of the first rotating cam 111 at the time of yarn joining to the second direction. The lengths of the yarn ends of the yarns Y1 and Y2 are increased. When the core ratio of the yarn Y is high, the stretchability of the yarn Y is high, so that the length of the portion introduced into the untwisting pipes 41a and 41b at the yarn end tends to vary. Therefore, when the core ratio of the yarn Y is high, by increasing the length of the yarn ends of the yarns Y1 and Y2 introduced into the untwisting pipes 41a and 41b, the length of the portion where the yarns Y1 and Y2 are spliced By securing the length (length of the part to be untwisted), the success rate of yarn joining can be increased.

  In the present embodiment, when viewed from above, the distance between the contact point 99a of the cam surface 111a with the first cam follower 112 and the center of the shaft 105 when the first rotating cam 111 is located at the origin position. And D1 is the distance between the contact point 99b of the cam surface 111a with the first cam follower 112 and the center of the shaft 105 when the first rotating cam 111 is rotated in the first direction by an angle θ from the origin position. When the second rotating cam 121 is rotated in the second direction by an angle θ from the origin position, the distance D2 is defined as the distance between the contact point 99c of the cam surface 111a with the first cam follower 112 and the center of the shaft 105 as D2. The difference [D0−D2] from the distance D0 is greater than the difference [D0−D1] from the distance D1 to the distance D0. Thus, when the first rotating cam 111 is rotated in the second direction by the angle θ, the yarn shifting levers 35a and 35b are moved more greatly than in the case where the first rotating cam 111 is rotated by the angle θ in the first direction, and the yarn Y1 , Y2 can be greatly bent, and as a result, the lengths of the yarn ends of the yarns Y1 and Y2 introduced into the untwisting pipes 41a and 41b can be increased. Of course, the sizes of [D0-D2] and [D0-D1] may be reversed. In this case, the same effect can be obtained by controlling the rotation in the first direction and the rotation in the second direction in reverse.

  In the present embodiment, the first rotating cam 111 is shaped as described above, so that the first rotating cam 111 is rotated in the first direction and the second rotating direction. In any case, the rotation angle of the first rotating cam 111 when the yarn ends of the yarns Y1 and Y2 are untwisted is set to the same angle θ. That is, the first angle and the second angle of the present invention are the same angle. Further, the second rotating cam 121 is symmetrical with respect to a straight line L2 connecting the second cam follower 122 of the cam surface 121a, the contact point 98a, and the rotating shaft 105a of the shaft 105 in a state where the second rotating cam 121 is located at the origin position. It has a shape.

  Accordingly, the cutters 53a and 53b and the clamp mechanism 54a are arranged while varying the lengths of the yarn ends of the yarns Y1 and Y2 introduced into the untwisting pipes 41a and 41b according to the rotation direction of the first rotating cam 111 at the time of yarn joining. , 54b can perform the same operation.

  Further, in the present embodiment, after the untwisting of the yarn ends of the yarns Y1 and Y2 is completed, the first rotating cam 111 is further rotated in the same direction as before so that the untwisted yarns Y1 and Y2 The yarn end can be pulled out from the untwisting pipes 41 a and 41 b and introduced into the twisting nozzle 46.

  In the present embodiment, three magnets 119a to 119c are embedded in the second rotating cam 121, and the magnetic sensor 155 detects the magnetic force of the magnets 119a to 119c, whereby the first rotating cam 111, It can be detected that the two-rotation cam 121 is located at the origin position. Thereby, when the yarn splicing is not performed, the first rotating cam 111 and the second rotating cam 121 can be accurately positioned at the origin position.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications are possible as long as they are described in the claims.

  In the above-described embodiment, the rotary cams 111 and 121 are plate-like cams, but the present invention is not limited to this. For example, instead of the rotating cams 111 and 121, a cylindrical cam member in which a groove for guiding the first cam follower 112 and a groove for guiding the second cam follower 122 are formed may be used. In this case, the portion of the cam member in which the groove for guiding the first cam follower 112 is formed corresponds to the “first rotating cam” of the present invention and guides the second cam follower 122. The portion in which the groove for forming is formed corresponds to the “second rotating cam” of the present invention. In this case, the surfaces of these grooves that come into contact with the cam followers 112 and 122 are the cam surfaces of the first and second rotating cams.

  Further, in the above-described embodiment, the yarn joining device 21 is the distance D0 between the contact point of the cam surface 111a of the first rotating cam 111 with the cam follower 112 and the rotating shaft 105a as viewed from above. As the difference is larger, the yarns Y1 and Y2 are bent more greatly. Correspondingly, the distance D2 is made smaller than the distance D1 (distance difference [D0−D2] is made larger than [D0−D1]). However, it is not limited to this. For example, contrary to the above-described embodiment, the yarn joining device 21 is configured such that the difference between the distance D0 between the contact point between the cam surface 111a of the first rotating cam 111 and the cam follower 112 and the rotating shaft 105a is different. The smaller the size, the larger the yarns Y1 and Y2 may be bent, and the distance D2 may be smaller than the distance D1.

  In the above-described embodiment, the second rotating cam 121 is configured to rotate integrally with the first rotating cam 111 for transmitting power to the yarn moving levers 35a and 35b. Is not limited. The first rotating cam 111 and the second rotating cam 121 may be independently rotatable, such as being connected to different motors.

  In the above-described embodiment, the yarn ends of the yarns Y1 and Y2 are untwisted both when the first rotating cam 111 is rotated in the first direction and when it is rotated in the second rotation direction. At this time, the rotation angle of the first rotation cam 111 is set to the same angle θ. That is, the first angle and the second angle of the present invention are the same angle. Furthermore, with respect to a straight line L2 connecting the second cam follower 122 of the cam surface 121a, the contact point 98a, and the rotation axis 105a of the shaft 105 in a state where the second rotation cam 121 is located at the origin position. It has a symmetrical shape. However, it is not limited to this.

  For example, when the second rotating cam 121 is rotated in the first direction and when the second rotating cam 121 is rotated in the second direction, the second rotation cam 121 is rotated in order to cause the cutters 53a and 53b and the clamp mechanisms 54a and 54b to perform different operations. The cam 121 may have an asymmetric shape with respect to the straight line L2.

  Further, for example, when the first rotating cam 111 is rotated in the second direction by the angle θ2 from the origin position, the contact point of the second cam surface 111a2 with the first cam follower 112, the rotating shaft 105a of the shaft 105, and Of the first cam follower 112 of the first cam surface 111a1 and the rotation of the shaft 105 when the first cam surface 111a1 is rotated in the first direction by an angle θ1 different from the angle θ2. The distance from the shaft 105a may be D1. In this case, for example, when the yarn ends of the yarns Y1 and Y2 are untwisted by the untwisting portion 31, if the core ratio Ry of the yarn Y is less than the predetermined value R0, the first rotating cam 111 is moved in the first direction. When the core ratio Ry of the yarn Y is equal to or greater than the predetermined value R0, the first rotating cam 111 is rotated by θ2 in the second direction. In this way, the lengths of the yarn ends of the yarns Y1 and Y2 introduced into the untwisting pipes 41a and 41b of the first rotating cam 111 can be made different as in the above-described embodiment.

  However, in the case where the first rotating cam 111 and the second rotating cam 121 are configured to rotate integrally, the shape of the second rotating cam 121 is changed to the above-mentioned according to the angles θ1 and θ2. It is necessary to be different from the case of the embodiment.

  In the above-described embodiment, the second rotating cam 121 is for transmitting power to the movable pieces 56 of the cutters 53a and 53b and the movable pieces 58 of the clamp mechanisms 54a and 54b. It is not limited to. The second rotating cam 121 may transmit power to only one of the movable pieces 56 of the cutters 53a and 53b and the movable pieces 58 of the clamp mechanisms 54a and 54b. Furthermore, the second rotating cam 121 may be for transmitting power to a drive target other than the movable piece 56 of the cutters 53a and 53b and the movable piece 58 of the clamp mechanisms 54a and 54b.

  In the above-described embodiment, after the yarn ends of the yarns Y1 and Y2 introduced into the untwisting pipes 41a and 41b are untwisted, the first rotary cam 111 is further rotated, thereby the yarn shifting lever 35a. 35b, the yarn ends of the untwisted yarns Y1 and Y2 are introduced into the twisting nozzle 46, but this is not restrictive. For example, after the yarn ends of the yarns Y1 and Y2 are untwisted as in the above-described embodiment, the yarn ends of the untwisted yarns Y1 and Y2 are added by a device different from the yarn shifting levers 35a and 35b. It may be introduced into the twist nozzle 46.

  In the above-described embodiment, the rotating cams 111 and 121 are positioned at the origin position based on the magnetic force detection results of the magnets 119a to 119c by the magnetic sensor 155. However, the present invention is not limited to this. The rotating cams 111 and 121 may be positioned at the origin position based on the detection result of another sensor. For example, in a photosensor having a light-emitting element and a light-receiving element that are provided with holes or slits in either the first rotating cam 111 or the second rotating cam 121 and sandwiching the holes or slits, light is received by the light-receiving element. Based on the result of whether or not the light is received, the rotary cams 111 and 121 may be positioned at the origin position.

  Further, there is no sensor for detecting that the rotating cams 111 and 121 are located at the origin position, and the rotating cams 111 and 121 may be located at the origin position only by the control of the stepping motor 101. .

  In the above-described embodiment, the first rotating cam 111 and the second rotating cam 121 are rotated by the stepping motor 101. However, the present invention is not limited to this. For example, another motor capable of controlling the forward / reverse rotation direction, such as a DC motor, may be used.

  In the above-described embodiment, the type of the yarn Y to be wound by the winding unit 13 is input, and whether or not the core ratio Ry of the yarn Y is less than the predetermined value R0 based on the input type of the yarn Y. However, the present invention is not limited to this. For example, the value of the core ratio Ry of the yarn Y may be input, and the above determination may be performed based on the input value of the core ratio Ry.

  Moreover, although the example which applied this invention to the winding unit of the automatic winder was demonstrated above, it is not restricted to this. The present invention may be applied to another yarn winding device such as a yarn winding device provided with a spinning device. Further, the yarn joining device is not limited to being provided in each yarn winding device. For example, the doffing device 3 may be provided with a yarn joining device.

2 Winding unit 11 Yarn feeding portion 13 Winding portion 21 Yarn splicing device 31 Untwisting portion 32 Twisting portion 35a, 35b Yarn feeding lever 41a, 41b Untwisting pipe 46 Twisting nozzle 101 Stepping motor 106 First cam mechanism 105a Rotation Shaft 107 Second cam mechanism 111 First rotating cam 111a Cam surface 111a1 First cam surface 111a2 Second cam surface 119a to 119c Magnet 112 Cam follower 121 Second rotating cam 122 Cam follower 150 Unit control device 155 Magnetic sensor

Claims (8)

A yarn joining device for joining two yarns,
An untwisting portion having two untwisting pipes into which the yarn ends of each yarn are introduced, and untwisting the yarn ends introduced into the untwisting pipe;
A twisting portion that has a twisting nozzle into which the yarn ends of two yarns untwisted at the untwisting portion are introduced, and twists the two yarn ends introduced into the twisting nozzle;
A yarn feeding lever for guiding yarn to the untwisting pipe and the twisting nozzle;
A first cam mechanism for transmitting power from a drive source to the yarn gathering lever,
The first cam mechanism is
A first rotating cam that rotates about a predetermined rotation axis;
A first cam follower that contacts a cam surface of the first rotating cam;
The first rotating cam is
When yarn splicing is not performed, it is located at a predetermined origin position,
A first cam surface that contacts the first cam follower when rotated at an angle of 180 ° or less in the first direction from the origin position;
A second cam surface that contacts the first cam follower when rotated at an angle of 180 ° or less from the origin position in a second direction opposite to the first direction;
The first cam surface is configured so that the yarn shifting lever and the yarn end of the yarn are disengaged by a first length in a state where the first rotating cam is rotated in the first direction by a first angle from the origin position. Formed to be located at the first untwisting position for introduction into the twisted pipe,
The second cam surface is configured such that when the first rotating cam is rotated in the second direction by a second angle from the origin position, the yarn shifting lever and the yarn end of the yarn are longer than the first length. A yarn splicing device formed so as to be positioned at a second untwisting position for introduction into the untwisting pipe by a length of two. The first cam surface is a yarn in which the yarn shifting lever is untwisted by the untwisting portion in a state where the first rotating cam is further rotated in the first direction than the first angle from the origin position. It is formed so as to be located at a twisting position for introducing an end into the twisting nozzle,
The second cam surface is formed so that the yarn shifting lever is positioned at the twisting position in a state where the first rotating cam is rotated further in the second direction than the second angle from the origin position. The yarn splicing device according to claim 1, wherein the yarn splicing device is provided.   The yarn splicing device according to claim 1 or 2, wherein the first angle and the second angle are the same size. The yarn joining device is
A second cam mechanism having a second rotating cam that rotates integrally with the first rotating cam; and a second cam follower that contacts a cam surface of the second rotating cam;
The cam surface of the second rotating cam is the second cam of the second rotating cam in a state where the first rotating cam is located at the origin position when viewed from a direction parallel to the rotating shaft. The yarn joining device according to claim 3, wherein the yarn joining device is symmetrical with respect to a straight line connecting a contact point with the cam follower and the rotation shaft. Seen from a direction parallel to the rotation axis,
The distance between the contact point of the first cam surface with the first cam follower and the rotation shaft in a state where the first rotation cam is located at the origin position, and a reference distance,
The distance between the contact point of the second cam surface with the first cam follower and the rotation shaft when the first rotation cam is rotated in the second direction by the second angle from the origin position, The difference from the reference distance is
The distance between the contact point of the first cam surface with the first cam follower and the rotation shaft in a state where the first rotation cam is rotated in the first direction by the first angle from the origin position. By being larger than the difference from the reference distance,
When the first rotating cam is rotated in the second direction by the second angle from the origin position, the thread gathering is more effective than when the first rotating cam is rotated in the first direction by the first angle from the origin position. 5. The structure according to claim 1, wherein the length of the yarn end of the yarn introduced into the untwisting pipe is increased by largely bending the yarn when the lever moves greatly. Yarn splicing device according to the above.   The yarn joining device according to any one of claims 1 to 5, further comprising a sensor for detecting that the first rotary cam is located at the origin position. A yarn winding device comprising the yarn joining device according to any one of claims 1 to 6,
A yarn supplying section for supplying yarn;
A winding unit for winding the yarn supplied from the yarn supplying unit;
The yarn joining device, which is arranged between the yarn feeding unit and the winding unit, and performs yarn joining between the yarn end of the yarn on the yarn feeding unit side and the yarn end of the yarn on the winding unit side; A yarn winding device comprising: A drive source connected to the first cam mechanism;
A control device for controlling the drive source,
The control device includes:
Information related to the core ratio of the yarn supplied from the yarn supplying unit is input,
When the yarn core ratio indicated by the information is less than a predetermined value, the drive source is controlled to rotate the first rotating cam in the first direction, and the first cam mechanism is moved from the drive source. Power is transmitted to the yarn shifting lever through
When the yarn core ratio indicated by the information is equal to or greater than the predetermined value, the drive source is controlled to rotate the first rotating cam in the second direction, and the first cam mechanism is moved from the drive source. The yarn winding device according to claim 7, wherein power is transmitted to the yarn moving lever through the yarn winding device.

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