Patent Description:
Patent Literature <NUM> (<CIT>) discloses a yarn winding machine including a roller which contacts a package during the formation of the package, a traverse device, and a free length changing member that is able to change a free length of a yarn between the roller and the traverse device during the formation of the package.

Patent Literature <NUM> (<CIT>) discloses a yarn winding machine including a bobbin holder which coaxially mounts and supports a plurality of winding bobbins and a plurality of traverse devices which have a yarn guide and reciprocates the yarn guide to twill each yarn for each winding bobbin. The traverse device of Patent Literature <NUM> is a belt type traverse device including an endless belt to which a yarn guide is attached, a pair of support units which support the endless belt so that at least a part of the endless belt is substantially parallel to the longitudinal direction of the bobbin holder, and a motor which drives the endless belt. A yarn winding machine according to the preamble of claim <NUM> is known from <CIT>. Another yarn winding machine is known from <CIT>.

In the yarn winding machine, the yarn traversed by the traverse device is wound to form a winding package. In the winding package, a so-called ear height (ear stand) phenomenon may occur in which the height of both ends is higher than that of the center due to the accumulation of yarns at both ends (folded yarns) of the package corresponding to the folded position of the yarn traverse. When the winding package in which the ear height phenomenon has occurred is unwound in a subsequent process, poor unwinding may occur. Therefore, in the yarn winding machine, it is required to suppress the occurrence of the ear height phenomenon. Then, it is necessary to change the traverse width and to control the change of the traverse width in order to suppress the occurrence of the ear height phenomenon.

In the yarn winding machine disclosed in Patent Literature <NUM>, it is possible to change the traverse width without changing the reciprocating range of the traverse guide by changing the distance (free length) between the roller and the traverse device. However, the yarn winding machine becomes large due to the moving distance between the roller and the traverse device. Since a space in which the yarn winding machine can be installed is limited depending on a factory in which the yarn winding machine is installed, or the like, it is desired to save the space of the yarn winding machine.

In the belt type traverse device disclosed in Patent Literature <NUM>, it is possible to change a traverse width or a traverse cycle by changing the forward/reverse rotation or rotation speed of the motor. Therefore, in the belt type traverse device, it is possible to suppress the occurrence of the ear height phenomenon by changing the traverse width during winding of the yarn and suppressing the difference in height between both ends and the center. However, the ability of the belt type traverse device depends on the performance of the motor. When the traverse width becomes narrow or the yarn winding speed becomes fast, it is necessary to shorten the cycle of switching between forward and reverse rotation (it is necessary to increase the switching frequency). Therefore, the current motor performance may not cope with the desired traverse cycle. As a result, in the belt type traverse device, there is concern that the occurrence of the ear height phenomenon cannot be effectively suppressed.

An object of the present invention is to provide a yarn winding machine capable of saving a space and changing a traverse width to a desired value while coping with a desired traverse cycle regardless of performance of a motor.

Further, another object is to provide a yarn winding machine capable of suppressing an occurrence of an ear height phenomenon in a winding package by controlling a change to a desired traverse width.

A yarn winding machine according to the invention is defined in independent claim <NUM>. A yarn winding machine according to the present invention is a yarn winding machine for winding a yarn to form a package, including: a winding mechanism which winds the yarn; and a traverse mechanism which traverses the wound yarn, wherein the traverse mechanism includes: a drive unit which generates a rotation of a drive shaft, a crank portion which converts the rotation of the drive shaft of the drive unit into a rotation of a circular orbit, and a rotary reciprocating conversion portion which converts the rotation of the circular orbit of the crank portion into a reciprocating motion, wherein the crank portion includes: a first power transmission portion which rotates while being connected to the drive shaft and transmits power of the drive unit, and a second power transmission portion which transmits power to the rotary reciprocating conversion portion, wherein a distance between the first power transmission portion and the second power transmission portion is changeable, and wherein the rotary reciprocating conversion portion includes a traverse guide locking the yarn.

In the yarn winding machine according to the present invention, the rotational motion of the crank portion is converted into the reciprocating motion in the rotary reciprocating conversion portion. Accordingly, in the yarn winding machine, it is not necessary to switch the forward/reverse rotation of the drive unit. Thus, in the yarn winding machine, it is possible to wind the yarn at a desired traverse cycle regardless of the performance of the motor.

Further, in the yarn winding machine, the distance between the first power transmission portion and the second power transmission portion is changeable. When the distance between the first power transmission portion and the second power transmission portion is changed, the rotation radius (rotation orbit) of the second power transmission portion is changed. Accordingly, the reciprocating range of the rotary reciprocating conversion portion, that is, the traverse width is changed. That is, the traverse width decreases when the rotation radius of the second power transmission portion is decreased and the traverse width increases when the rotation radius of the second power transmission portion is increased. Thus, in the yarn winding machine, it is possible to wind the yarn at a desired traverse width. Further, in the yarn winding machine, it is possible to change the traverse width even when the distance between the roller and the traverse device is not changed and hence to save a space.

The yarn winding machine according to the invention further includes a changing device which changes a distance between the first power transmission portion and the second power transmission portion and a control device which controls an operation of the changing device. In this configuration, it is possible to change a distance between the rotation axis of the first power transmission portion and the second power transmission portion at a desired timing by controlling the changing device using the control device. Therefore, in the yarn winding machine, it is possible to suppress the occurrence of the ear height phenomenon by controlling the changing device so that the traverse width is changed at a desired timing.

In an embodiment, the yarn winding machine may further include an elastic member that biases the second power transmission portion toward the first power transmission portion and a moving member that moves the second power transmission portion in a direction opposite to a biasing direction of the elastic member. In this configuration, since the second power transmission portion is biased toward the first power transmission portion by the elastic member, it is possible to shorten the distance between the second power transmission portion and the first power transmission portion, that is, the traverse width by the biasing force of the elastic member. Therefore, in the yarn winding machine, it is possible to promptly change the traverse width.

In an embodiment, the changing device may send a fluid to the moving member in a direction opposite to the biasing direction of the elastic member and may move the moving member by adjusting a pressure of the fluid. In this configuration, it is possible to accurately move the second power transmission portion.

In an embodiment, the second power transmission portion may be provided to be movable along a direction orthogonal to the rotation axis of the first power transmission portion. In this configuration, since the second power transmission portion is linearly moved along a direction orthogonal to the rotation axis of the first power transmission portion, it is possible to change the traverse width. Therefore, in the yarn winding machine, it is possible to promptly change the traverse width. Thus, in the yarn winding machine, it is possible to cope with the change of the traverse width even when the yarn is wound at a high speed.

In an embodiment, the crank portion may have a circular shape when viewed from a direction along the first power transmission portion.

According to an aspect of the present invention, it is possible to save a space and to change a traverse width to a desired value while coping with a desired traverse cycle regardless of the performance of a motor.

Further, since the change of the traverse width is controlled, it is possible to suppress the occurrence of an ear height phenomenon in a winding package.

In the description of the drawings, the same or equivalent components are designated by the same reference numerals, and duplicate description is omitted. In the following description, a first direction D1 (which is a right and left direction and in which an arrow side is a right side), a second direction D2 (which is a front and rear direction and in which an arrow side is a rear side), and a third direction D3 (which is an up and down direction and in which an arrow side is an upper side) specified in the drawings is used for description.

A yarn winding machine <NUM> shown in <FIG> is applied to spinning equipment (not shown) including a spinning device (not shown) that simultaneously spins a plurality of yarns Y (see <FIG>) such as spandex spinning. The yarn winding machine <NUM> winds the yarn Y spun from the above-described spinning device on a winding bobbin B to form a winding package P. In this embodiment, the yarn winding machine <NUM> can simultaneously form a plurality of (for example, ten) winding packages P.

As shown in <FIG>, the yarn winding machine <NUM> includes a support mechanism <NUM>, a winding mechanism <NUM>, and a traverse mechanism <NUM>.

The support mechanism <NUM> is disposed at one end portion in the first direction D1. The support mechanism <NUM> accommodates an air pressure adjusting device (changing device) <NUM> which adjusts an air pressure of air supplied from an air pressure supply device (not shown) disposed in a factory having the yarn winding machine <NUM> installed therein and supplies the air (fluid) to a traverse device <NUM> (rotary union <NUM>), a drive motor which supplies power to each part, and the like. Further, the support mechanism <NUM> is provided with a control device <NUM>. The control device <NUM> is a part that controls various operations of the yarn winding machine <NUM> and a processor having an integrated circuit mounted therein or a computer system having the same.

The winding mechanism <NUM> winds the yarn Y to form the winding package P. The winding mechanism <NUM> includes a touch roller <NUM>, bobbin holders <NUM> and <NUM>, and a turret <NUM>.

The touch roller <NUM> is a roller which contacts the winding package P. The touch roller <NUM> is rotatably supported by a swing arm (not shown). As shown in <FIG>, the touch roller <NUM> is disposed along the first direction D1. As shown in <FIG> and <FIG>, the touch roller <NUM> rotates while being in contact with the winding package P and sends the yarn Y traversed by the traverse device <NUM> to the outer periphery (outer layer) of the winding package P. The touch roller <NUM> is provided to be movable in a direction moving toward the winding package P (winding bobbin B) at the winding position or a direction moving away from the winding package P by swinging the swing arm.

As shown in <FIG> and <FIG>, the bobbin holders <NUM> and <NUM> support the winding bobbin B. The bobbin holders <NUM> and <NUM> rotationally drive the winding bobbin B to wind the yarn Y on the winding bobbin B. The bobbin holders <NUM> and <NUM> are arranged along the first direction D1. The bobbin holders <NUM> and <NUM> are cantilevered by the turret <NUM>. That is, one ends of the bobbin holders <NUM> and <NUM> are fixed to the turret <NUM>. The bobbin holders <NUM> and <NUM> are arranged at positions symmetrical with respect to the rotation axis of the turret <NUM>. The bobbin holders <NUM> and <NUM> are rotationally driven by a drive motor (not shown).

As shown in <FIG>, the turret <NUM> is supported by the support mechanism <NUM>. The turret <NUM> is rotatably provided in the support mechanism <NUM>. The turret <NUM> is rotated around the rotation axis by a drive motor (not shown). The turret <NUM> supports the bobbin holders <NUM> and <NUM>. The turret <NUM> switches the positions of the bobbin holders <NUM> and <NUM>. By rotating the turret <NUM> itself half a turn, the positions of two bobbin holders <NUM> and <NUM> can be switched so that one of the bobbin holders <NUM> and <NUM> is located at the upper winding position and the other is located at the lower standby position.

The traverse mechanism <NUM> traverses the yarn Y. The traverse mechanism <NUM> is disposed on the upstream side of the touch roller <NUM> of the winding mechanism <NUM> in the running direction of the yarn Y. As shown in <FIG>, <FIG>, and <FIG>, in this embodiment, the traverse mechanism <NUM> includes a plurality of (for example, ten) traverse devices <NUM>. The number of the traverse devices <NUM> corresponds to the number of the winding bobbins B (winding packages P). The plurality of traverse devices <NUM> are accommodated in a housing <NUM>. The housing <NUM> is fixed to the support mechanism <NUM>. The plurality of traverse devices <NUM> are arranged in the housing <NUM> at predetermined intervals in the first direction D1.

As shown in <FIG>, <FIG>, and <FIG>, the traverse device <NUM> includes a reciprocating double slider crank portion (rotary reciprocating conversion portion) <NUM>, a crank disc (crank portion) <NUM>, a drive motor (drive unit) <NUM>, and a rotary union <NUM>.

As shown in <FIG>, the reciprocating double slider crank portion <NUM> includes guide supports <NUM> and <NUM>, slider guides <NUM> and <NUM>, a slider <NUM>, a traverse guide <NUM>, and a fixing portion <NUM>. The reciprocating double slider crank portion <NUM> converts the rotational motion of the crank disc <NUM> into the reciprocating motion of the slider <NUM>.

The guide supports <NUM> and <NUM> support the slider guides <NUM> and <NUM>. The guide supports <NUM> and <NUM> have, for example, a rectangular parallelepiped shape. The guide supports <NUM> and <NUM> are fixed to the housing <NUM>. The guide supports <NUM> and <NUM> are arranged along the third direction D3. The guide supports <NUM> and <NUM> are arranged to face each other at a predetermined interval in the first direction D1.

The slider guides <NUM> and <NUM> guide the slider <NUM> in a predetermined direction. The slider guides <NUM> and <NUM> have, for example, a bar shape. The slider guides <NUM> and <NUM> are supported by the guide supports <NUM> and <NUM>. The slider guides <NUM> and <NUM> are arranged along the first direction D1. One ends of the slider guides <NUM> and <NUM> are fixed to the guide support <NUM> and the other ends of the slider guides <NUM> and <NUM> are fixed to the guide support <NUM>. That is, the slider guides <NUM> and <NUM> are hung on the guide support <NUM> and the guide support <NUM>. The slider guides <NUM> and <NUM> are arranged to face each other at a predetermined interval in the third direction D3.

The slider <NUM> moves the traverse guide <NUM> in a predetermined direction. The slider <NUM> has, for example, a rectangular parallelepiped shape. The slider <NUM> is provided in the slider guides <NUM> and <NUM> to be movable (slidable). The slider <NUM> is inserted into the slider guides <NUM> and <NUM>. The slider <NUM> moves along the longitudinal direction of the slider guides <NUM> and <NUM>, that is, the first direction D1. The slider <NUM> is disposed along the third direction D3 and is provided over the slider guide <NUM> and the slider guide <NUM>.

The slider <NUM> is provided with an elongated hole <NUM>. The elongated hole <NUM> is a through-hole which penetrates the slider <NUM> in the thickness direction (second direction D2). The elongated hole <NUM> is disposed along a direction in which the slider <NUM> is disposed, that is, the third direction D3. The width of the elongated hole <NUM> is equal to or larger than an outer diameter of a crank pin <NUM> to be described later and is substantially equal to the outer diameter of the crank pin <NUM>.

The traverse guide <NUM> locks the yarn Y. The traverse guide <NUM> traverses the yarn Y sent in the downstream direction by reciprocating with the traverse width in the traverse direction (corresponding to the first direction D1) with the yarn Y locked. The traverse guide <NUM> is fixed to the slider <NUM> through the fixing portion <NUM>. The fixing portion <NUM> has, for example, a rectangular parallelepiped shape. The traverse guide <NUM> moves in accordance with the movement of the slider <NUM>.

The crank disc <NUM> includes a disc portion (first power transmission portion) <NUM>, a connection portion (first power transmission portion) <NUM>, a crank pin (second power transmission portion) <NUM>, a piston (moving member) <NUM>, and a spring (elastic member) <NUM>. The crank disc <NUM> converts the rotation of a drive shaft <NUM> (to be described later) of the drive motor <NUM> into the rotation of a circular orbit.

The disc portion <NUM> has, for example, a disc shape. That is, the disc portion <NUM> has a circular shape when viewed from the direction along a rotation axis Ax of the disc portion <NUM> (see <FIG>). The disc portion <NUM> rotates around the rotation axis Ax.

The connection portion <NUM> is connected to the drive shaft <NUM> of the drive motor <NUM>. The connection portion <NUM> transmits the power of the drive motor <NUM>. The connection portion <NUM> is provided integrally with the disc portion <NUM>. When the connection portion <NUM> is rotationally driven by the drive motor <NUM>, the disc portion <NUM> rotates.

The crank pin <NUM> has, for example, a pillar shape. The crank pin <NUM> transmits power to the reciprocating double slider crank portion <NUM>. As shown in <FIG>, the crank pin <NUM> is projected toward the rear side of the crank disc <NUM>. The crank pin <NUM> is disposed at a position offset from the rotation axis Ax of the disc portion <NUM>. A distance between the crank pin <NUM> and the connection portion <NUM> is changeable. In this embodiment, the rotation axis of the connection portion <NUM> matches the rotation axis Ax of the disc portion <NUM>. That is, a distance between the crank pin <NUM> and the rotation axis Ax of the disc portion <NUM> is changeable.

A front end portion (a part) of the crank pin <NUM> is located inside the elongated hole <NUM> of the slider <NUM>. The crank pin <NUM> is located in a crank pin guide <NUM> of the disc portion <NUM> and is provided to be movable along the crank pin guide <NUM>. As shown in <FIG>, the crank pin guide <NUM> is disposed between the outer edge and the rotation axis Ax of the disc portion <NUM> along the radial direction of the disc portion <NUM> (the direction orthogonal to the rotation axis of the connection portion <NUM>).

The piston <NUM> is provided integrally with the crank pin <NUM>. The piston <NUM> is disposed inside the hollow portion <NUM>. The piston <NUM> has, for example, a columnar shape. The hollow portion <NUM> is disposed along the radial direction of the disc portion <NUM> and forms a space for accommodating the piston <NUM>. The piston <NUM> moves inside the hollow portion <NUM> in accordance with the pressure of air supplied to the hollow portion <NUM>.

The spring <NUM> is provided between the piston <NUM> and the upper surface of the hollow portion <NUM>. The spring <NUM> biases the piston <NUM> toward the rotation axis Ax of the disc portion <NUM>. As shown in <FIG>, the piston <NUM> is provided to be movable inside the hollow portion <NUM>. The piston <NUM> moves inside the hollow portion <NUM> in accordance with the pressure of air supplied to the hollow portion <NUM>. When air of a predetermined pressure is supplied to the hollow portion <NUM>, the piston <NUM> moves in a direction against the biasing force of the spring <NUM>, that is, toward the outer edge of the disc portion <NUM>. When the supply of air to the hollow portion <NUM> is stopped (when the pressure of air decreases), the piston <NUM> moves toward the rotation axis Ax of the disc portion <NUM> by the biasing force of the spring <NUM>.

As shown in <FIG>, when air is supplied to the hollow portion <NUM> of the disc portion <NUM>, the crank pin <NUM> moves in a direction moving away from the rotation axis Ax in accordance with the movement of the piston <NUM>. The crank pin <NUM> moves up to a separation position. The separation position is a position in which the crank pin <NUM> is the farthest from the rotation axis Ax of the disc portion <NUM>. As shown in <FIG>, the crank pin <NUM> is located at an initial position in an initial state (a state in which no air is supplied). The initial position is a position in which the crank pin <NUM> is the closest to the rotation axis Ax of the disc portion <NUM>. When the supply of air is stopped (the air pressure decreases), the crank pin <NUM> moves to the initial position by the biasing force of the spring <NUM>.

The drive motor <NUM> rotationally drives the crank disc <NUM>. The drive motor <NUM> is, for example, an induction motor. The drive motor <NUM> generates the rotation of the drive shaft <NUM> (see <FIG>). The operation of the drive motor <NUM> is controlled by the control device <NUM>. As shown in <FIG>, a shaft portion <NUM> described later of the rotary union <NUM> is inserted into the drive shaft <NUM> of the drive motor <NUM>.

The rotary union <NUM> supplies air to the rotating crank disc <NUM>. As shown in <FIG>, the rotary union <NUM> includes a main body portion <NUM>, a rotation portion <NUM>, and a shaft portion <NUM>. Air is supplied from the air pressure adjusting device <NUM> to the main body portion <NUM>. The main body portion <NUM> is fixed to the housing <NUM>. The rotation portion <NUM> is rotatably provided in the main body portion <NUM>. The shaft portion <NUM> is connected to the rotation portion <NUM>.

The shaft portion <NUM> is disposed along the second direction D2 and is inserted into the drive shaft <NUM> of the drive motor <NUM> and the front end (supply port) is located at the hollow portion <NUM> of the crank disc <NUM>. The main body portion <NUM> includes a channel <NUM> through which air supplied from the air pressure adjusting device <NUM> flows. The shaft portion <NUM> includes a channel <NUM> which communicates with the channel <NUM> and supplies air to the hollow portion <NUM> of the crank disc <NUM> by allowing the air to flow. The air pressure adjusting device <NUM> is controlled by the control device <NUM> and supplies air of a predetermined pressure to the rotary union <NUM>. The control device <NUM> controls the air pressure adjusting device <NUM> based on the setting contents to control the pressure of air supplied to the rotary union <NUM>.

In the traverse device <NUM>, the slider <NUM> moves in a reciprocating manner when the crank disc <NUM> rotates. Specifically, in the traverse device <NUM>, when the crank disc <NUM> rotates, the crank pin <NUM> rotates in accordance with the rotation. The crank pin <NUM> moves in a reciprocating manner inside the elongated hole <NUM> while contacting the elongated hole <NUM> of the slider <NUM>. Accordingly, the slider <NUM> moves in a reciprocating manner along the slider guides <NUM> and <NUM> and the traverse guide <NUM> moves in a reciprocating manner in the traverse width. In the traverse device <NUM>, the moving direction of the slider <NUM> is switched at a cycle of half a rotation of the crank disc <NUM>.

In the traverse device <NUM>, it is possible to change the traverse width (the movement range of the traverse guide <NUM>) by changing the position of the crank pin <NUM>. That is, in the traverse device <NUM>, it is possible to change the traverse width by changing the rotation radius of the crank pin <NUM>. In the traverse device <NUM>, the traverse width decreases when the rotation radius of the crank pin <NUM> is decreased (the distance from the rotation axis Ax is decreased) and the traverse width increases when the rotation radius of the crank pin <NUM> is increased (the distance from the rotation axis Ax is increased).

As shown in <FIG>, in the traverse device <NUM>, the traverse width becomes W1 by setting the position of the crank pin <NUM> to the separation position (<FIG>). The traverse width W1 is the largest width in the traverse device <NUM>. As shown in <FIG>, in the traverse device <NUM>, the traverse width becomes W2 by setting the position of the crank pin <NUM> to the initial position (<FIG>). The traverse width W2 is the smallest width in the traverse device <NUM> (W1 > W2). In the traverse device <NUM>, it is possible to change the traverse width in the range between the traverse width W1 and the traverse width W2 by changing (adjusting) the position of the crank pin <NUM>.

In the yarn winding machine <NUM>, the position of the crank pin <NUM> is set in accordance with the traverse width corresponding to the winding package P. The control device <NUM> controls the air pressure adjusting device <NUM> so that the position of the crank pin <NUM> becomes a position corresponding to the traverse width. In the yarn winding machine <NUM>, the traverse width is changed at a desired timing by changing the position of the crank pin <NUM> at a desired timing during the formation of the winding package P. Specifically, the control device <NUM> controls the pressure of air supplied to the traverse device <NUM> (rotary union <NUM>) by controlling the air pressure adjusting device <NUM>. Accordingly, the traverse device <NUM> changes the traverse width at a desired timing. The traverse device <NUM> decreases the traverse width, for example, at a cycle of once every four round trips.

As described above, in the yarn winding machine <NUM> according to this embodiment, the rotation of the crank disc <NUM> is converted into the reciprocating motion. Accordingly, in the yarn winding machine <NUM>, it is not necessary to switch between forward rotation and reverse rotation in the drive motor <NUM>. Further, in the yarn winding machine <NUM>, it is possible to increase the traverse speed in the traverse device <NUM> by increasing the rotation speed of the drive motor <NUM>. Thus, in the yarn winding machine <NUM>, it is possible to wind the yarn at a desired traverse cycle regardless of the performance of the drive motor <NUM>. Thus, in the yarn winding machine <NUM>, it is possible to decrease the traverse width by changing the position of the crank pin <NUM>.

Further, in the yarn winding machine <NUM>, it is possible to change a distance between the crank pin <NUM> and the rotation axis Ax of the disc portion <NUM> of the traverse device <NUM>. When the position of the crank pin <NUM> is changed, the rotation radius (rotation orbit) of the crank pin <NUM> is changed. Accordingly, the reciprocating range of the slider <NUM>, that is, the traverse width is changed. That is, in the yarn winding machine <NUM>, the traverse width decreases when the rotation radius of the crank pin <NUM> is decreased and the traverse width increases when the rotation radius of the crank pin <NUM> is increased. Thus, in the yarn winding machine <NUM>, it is possible to wind the yarn at a desired traverse width. Further, it is possible to change the traverse width even when the distance between the touch roller <NUM> and the traverse device <NUM> is not changed and hence to save a space.

The yarn winding machine <NUM> according to this embodiment includes the changing device which changes a distance between the crank pin <NUM> and the rotation axis Ax of the disc portion <NUM> and the control device <NUM> which controls the operation of the changing device. In this configuration, it is possible to change a distance between the crank pin <NUM> and the rotation axis Ax of the disc portion <NUM> at a desired timing by controlling the changing device using the control device <NUM>. Therefore, in the yarn winding machine <NUM>, it is possible to suppress the occurrence of an ear height phenomenon by controlling the changing device so that the traverse width is changed at a desired timing.

The yarn winding machine <NUM> according to this embodiment includes the spring <NUM> which biases the crank pin <NUM> toward the rotation axis Ax of the disc portion <NUM> and the piston <NUM> which moves the crank pin <NUM> in a direction opposite to the biasing direction of the spring <NUM>. In this configuration, since the crank pin <NUM> is biased toward the rotation axis Ax of the disc portion <NUM> by the spring <NUM>, it is possible to shorten a distance between the crank pin <NUM> and the rotation axis Ax of the disc portion <NUM>, that is, the traverse width by the biasing force of the spring <NUM>. Therefore, in the yarn winding machine <NUM>, it is possible to promptly change the traverse width.

In the yarn winding machine <NUM> according to this embodiment, the changing device sends a fluid to the piston <NUM> in a direction opposite to the biasing direction of the spring <NUM> and moves the piston <NUM> by adjusting the pressure of the fluid. In this configuration, it is possible to accurately move the crank pin <NUM>.

In the yarn winding machine <NUM> according to this embodiment, the crank pin <NUM> is provided to be movable along the radial direction of the disc portion <NUM>. In this configuration, it is possible to change the traverse width by linearly moving the crank pin <NUM> along the radial direction. Therefore, in the yarn winding machine <NUM>, it is possible to promptly change the traverse width. Thus, in the yarn winding machine <NUM>, it is possible to cope with the change of the traverse width even when the yarn Y is wound at a high speed.

Next, a second embodiment will be described. As shown in <FIG> and <FIG>, a yarn winding machine 1A includes a support mechanism <NUM>, a winding mechanism <NUM>, and a traverse mechanism 4A.

In this embodiment, the traverse mechanism 4A includes one traverse device 5A. The traverse device 5A is disposed at the center portion of the housing <NUM> in the first direction D1.

As shown in <FIG>, the traverse device 5A includes a reciprocating double slider crank portion 51A, a crank disc <NUM>, a drive motor <NUM>, and a rotary union <NUM>.

As shown in <FIG> and <FIG>, the reciprocating double slider crank portion 51A includes a fixing portion 517A. The fixing portion 517A is fixed to a slider <NUM>. As shown in <FIG>, the fixing portion 517A is disposed along the first direction D1. A plurality of (for example, ten) traverse guides <NUM> are arranged in the fixing portion 517A. The traverse guides <NUM> are arranged at predetermined intervals in the direction (first direction D1) in which the fixing portion 517A is disposed. That is, the traverse guide <NUM> is disposed to correspond to the position of the winding bobbin B. The plurality of traverse guides <NUM> fixed to the fixing portion 517A move in accordance with the movement of the slider <NUM>.

In the traverse device 5A, the slider <NUM> moves in a reciprocating manner when the crank disc <NUM> rotates. Specifically, in the traverse device 5A, when the crank disc <NUM> rotates, the crank pin <NUM> rotates in accordance with the rotation. The crank pin <NUM> moves inside an elongated hole <NUM> while contacting the elongated hole <NUM> of the slider <NUM>. Accordingly, the slider <NUM> moves in a reciprocating manner along the slider guides <NUM> and <NUM> and the plurality of traverse guides <NUM> move in a reciprocating manner together in the traverse range. In the traverse device 5A, the moving direction of the slider <NUM> is switched at a cycle of half a rotation of the crank disc <NUM>.

As described above, in the yarn winding machine 1A according to this embodiment, it is possible to suppress the occurrence of an ear height phenomenon in the winding package, to save a space, and to increase a yarn winding speed. Further, only one traverse device 5A is provided in the yarn winding machine 1A. In the traverse device 5A, the plurality of traverse guides <NUM> are driven at one time. Accordingly, it is possible to reduce the manufacturing cost and running cost of the yarn winding machine <NUM>.

As described above, the embodiments of the present invention have been described, but the present invention is not essentially limited to the above-described embodiments and can be modified into various forms within the scope of the invention which is defined by the appended claims.

In the above-described embodiments, a mode in which the crank disc <NUM> has a circular shape when viewed from the direction along the rotation axis Ax has been described as an example. However, the shape of the crank disc <NUM> is not limited thereto and may be, for example, a rectangular shape, a polygonal shape, or the like. It is preferable that the crank disc <NUM> has a circular shape when the crank disc rotates at a high speed.

In the above-described embodiments, a mode in which the elongated hole <NUM> is the through-hole has been described as an example. However, the elongated hole <NUM> may not be the through-hole, but may be, for example, a recess such as a concave portion, or the like.

In the above-described embodiments, a mode in which the piston <NUM> provided integrally with the crank pin <NUM> is moved by an air pressure has been described as an example. However, the means for changing the position of the crank pin <NUM> is not limited thereto. For example, the position of the crank pin <NUM> may be changed by a hydraulic pressure and the position may be changed by a solenoid valve or the like.

In the above-described embodiments, a mode in which the first power transmission portion includes the disc portion <NUM> and the connection portion <NUM> has been described as an example. However, the first power transmission portion may include only the connection portion <NUM>. In this configuration, the connection portion <NUM> and the crank pin <NUM> may be connected to each other by a connection member or the like.

Claim 1:
A yarn winding machine (<NUM>, 1A) for winding a yarn (Y) to form a package (P), comprising:
a winding mechanism (<NUM>) which winds the yarn (Y); and
a traverse mechanism (<NUM>, 4A) which traverses the wound yarn (Y),
wherein the traverse mechanism (<NUM>, 4A) includes:
a drive unit (<NUM>) which generates a rotation of a drive shaft (<NUM>),
a crank portion (<NUM>) which converts the rotation of the drive shaft (<NUM>) of the drive unit (<NUM>) into a rotation of a circular orbit, and
a rotary reciprocating conversion portion (<NUM>) which converts the rotation of the circular orbit of the crank portion (<NUM>) into a reciprocating motion,
wherein the crank portion (<NUM>) includes:
a first power transmission portion (<NUM>) which rotates while being connected to the drive shaft (<NUM>) and transmits power of the drive unit (<NUM>), and
a second power transmission portion (<NUM>) which transmits power to the rotary reciprocating conversion portion (<NUM>),
wherein a distance between a rotation axis (Ax) of the first power transmission portion (<NUM>) and the second power transmission portion (<NUM>) is changeable, and
wherein the rotary reciprocating conversion portion (<NUM>) includes a traverse guide (<NUM>) locking the yarn (Y), wherein
the yarn winding machine (<NUM>, 1A) further comprises a changing device (<NUM>) which changes a distance between the rotation axis (Ax) of the first power transmission portion (<NUM>) and the second power transmission portion (<NUM>),
characterized in that the yarn winding machine (<NUM>, 1A) further comprises a control device (<NUM>) which is a processor provided with an integrated circuit or a computer system equipped with said processor and controls an operation of the changing device (<NUM>), so that a traverse width is changed at a desired timing.