Patent Description:
A spinning winding machine disclosed in Patent Literature <NUM> produces a package by winding a yarn on a bobbin. The spinning winding machine includes two bobbin holders and a turret. A plurality of bobbins are attached to each of the two bobbin holders. Two bobbin holders are attached to the turret. The position of the bobbin holder changes between a winding position, a standby position, and a yarn switching position by rotation of the turret. While one bobbin holder is positioned at the winding position to produce the package, the other bobbin holder is positioned at the standby position. After the yarn winding is completed, the two bobbin holders are positioned at the yarn switching positions by rotation of the turret. Next, the spinning winding machine switches from a state of winding the yarn on the bobbin of one bobbin holder to a state of winding the yarn on the bobbin of the other bobbin holder by operating a slide guide.

The spinning winding machine of Patent Literature <NUM> sets the position of one bobbin holder to the position of the full package at the time of yarn switching, in other words a position shifted <NUM>° clockwise from the winding position in order to thread the yarn on the bobbin of one bobbin holders before starting package produce. However, in a yarn winding machine having two winding units arranged upper and lower for producing a package by winding a yarn fed from a yarn feeding roller, it is necessary to avoid interference between a bobbin holder of the upper yarn winding unit and the yarn heading for the lower yarn winding unit from the yarn feed roller. Therefore, it is necessary to be largely offset the lower winding unit with respect to the upper winding unit. As a result, the installation area of the yarn winding machine becomes large, and there is room for improvement.

<CIT> presents a spun yarn winding device and spun yarn winding facility. A spun yam winding device is compacted in a vertical direction provided with: a machine body; a turret; a feeding roller fixed to the machine body, is not in contact with the winding bobbins and feeds yarns to the winding bobbins at a speed equal to or faster than the winding speed; a traverse device is fixed in upstream side of advance direction of the yarns relative to the feeding roller and which traverses the yarns; a peripheral speed detection unit detecting the peripheral speed of the winding bobbins; and a control unit performing basic operation for maintaining the free length of the yarns at a standard length by controlling the rotational angle of the turret during a yam winding period, the free length of the yarns located between the feeding roller and the winding bobbins.

The present invention has been made in view of the above circumstances, and a primary object thereof is to provide a configuration with a small installation area in a yarn winding machine having two winding units arranged at upper and lower for producing a package by winding a yarn fed from a yarn feed roller.

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

According to an aspect of the present invention, a yarn winding machine with the following configuration is provided. That is, the yarn winding machine includes a lower winding unit and an upper winding unit. The lower winding unit winds a yarn fed from a yarn feed roller to produce a package. The upper winding unit is arranged at a higher position than the lower winding unit and at an offset position perpendicular to an axial direction of the package with respect to the lower winding unit in the plan view, and the upper winding unit winds the yarn fed from the yarn feed roller to produce the package. The upper winding unit includes a first bobbin holder, a second bobbin holder, a bobbin holder moving mechanism, and a contact roller. The first bobbin holder holds the first bobbin. The second bobbin holder holds the second bobbin. The first bobbin holder and the second bobbin holder are attached to the bobbin holder moving mechanism, and the bobbin holder moving mechanism changes a position of the first bobbin holder and the second bobbin holder by rotating around a rotation axis parallel to the axial direction of the package. The contact roller rotates in contact with the first bobbin, the second bobbin, or the package when producing the package. With relation to a position in which the bobbin holder moving mechanism holds the first bobbin holder or the second bobbin holder, a position where the first bobbin, the second bobbin, or the package contact with the contact roller and the yarn is wound on the first bobbin or the second bobbin to produce the package is defined as <NUM>° or <NUM>°. A rotation direction of rotating from <NUM>° toward an offset direction in which the upper winding unit is offset with respect to the lower winding unit is defined as positive. The bobbin holder moving mechanism sets the position of the first bobbin holder to a position larger than <NUM>° and smaller than <NUM>° by receiving a signal for threading the yarn to the first bobbin.

As a result, the offset amount in which the upper winding unit is offset with respect to the lower winding unit can be reduced, and the installation area of the yarn winding machine can be reduced.

In the yarn winding machine described above, after receiving a signal for threading the yarn on the first bobbin, the bobbin holder moving mechanism preferably sets the position of the first bobbin holder to a position larger than <NUM>° and smaller than <NUM>°.

As a result, the yarn threading of the upper winding unit can be performed at a position farther from the yarn path of the lower winding unit and at a position where the possibility of contact between the yarn and the contact roller is further reduced.

In the yarn winding machine described above, after receiving a signal for performing a yarn switching in which when the yarn is wound on the first bobbin, the yarn comes to be wound on the second bobbin, or when the yarn is wound on the second bobbin, the yarn comes to be wound on the first bobbin, the bobbin holder moving mechanism preferably sets a position of one of the first bobbin holder and the second bobbin holder to <NUM>° and sets the other position to <NUM>°.

As a result, when performing the yarn switching in which after threading the yarn on the first bobbin, the yarn wound on the first bobbin come to be wound on the second bobbin, or the yarn switching in which after producing the package, the yarn wound on the fully wound package of the first bobbin or the second bobbin come to be wound on the second bobbin or the first bobbin which is not wound the yarn, the yarn switching can be performed in a state where the first bobbin and the second bobbin are positioned far from the yarn path of the lower winding unit.

In the yarn winding machine described above, the bobbin holder moving mechanism preferably rotates so that positions of the first bobbin holder and the second bobbin holder are changed only in the positive direction from the state where the yarn is threaded on the first bobbin to the state where the yarn is wound on the second bobbin to produce the package.

Control of the bobbin holder moving mechanism can be simplified. In addition, since the first bobbin on which the yarn layer is formed by waste winding does not pass through the area of the lower winding unit near the yarn path, the offset amount can be reduced.

The yarn winding machine described above preferably has the following configuration. That is, by receiving a signal for threading the yarn on the first bobbin, a position of the first bobbin holder is set to the position larger than <NUM>° and smaller than <NUM>°, and then by receiving a signal indicating a completion of an operation of threading the yarn to the first bobbin, a position of the first bobbin holder is set to a position greater than <NUM>° and less than <NUM>°.

As a result, it is possible to prevent the first bobbin from being wound thicker at a position greater than <NUM>° and less than <NUM>°, so that the first bobbin or its yarn layer is less likely to interfere with the yarn path of the lower winding unit.

In the yarn winding machine described above, the upper winding unit preferably includes a windbreak plate for preventing accompanying flow generated by a rotation of the package formed on the first bobbin holder or the second bobbin holder from affecting the yarn wound at the lower winding unit.

By providing the windbreak plate, the influence of the accompanying flow on the yarn can be reduced.

In the yarn winding machine described above, when the package formed on the second bobbin is fully wound, in a state where the bobbin holder moving mechanism sets a position of the first bobbin holder to a position of less than ±<NUM>° with respect to <NUM>°, the yarn wound on the second bobbin preferably switched to be wound on the first bobbin.

As a result, the fully wound package does not pass through a range close to the yarn path to the lower winding unit. Therefore, it is possible to further reduce the offset amount of the upper winding unit. In addition, the operation of winding the yarn connected to the package on the first bobbin can be easily performed.

Next, an embodiment of the present invention will be described with reference to drawings. <FIG> is a front view of a yarn winding machine <NUM> according to an embodiment of the present invention. <FIG> is a block diagram of the yarn winding machine <NUM>. In the following description, upstream or downstream in a yarn running direction may simply be referred to as "upstream" or "downstream".

An unillustrated spinning machine is arranged upstream of the yarn winding machine <NUM> illustrated in <FIG>. A yarn <NUM> produced by the spinning machine is supplied to the yarn winding machine <NUM> via a yarn feed roller. The yarn winding machine <NUM> winds the yarn <NUM> on bobbins <NUM>, <NUM> and form yarn layers to produce packages <NUM>. The yarn <NUM> is an elastic yarn such as spandex. However, the type of yarn <NUM> is not limited to that yarn, and a synthetic yarn including nylon, polyester, or the like may be used.

As illustrated in <FIG>, the yarn winding machine <NUM> includes an upper winding unit 10a and a lower winding unit 10b. The yarn <NUM> is separately fed to each of the upper winding unit 10a and the lower winding unit 10b from the common yarn feed roller <NUM>, and the packages <NUM> are separately produced at the upper winding unit 10a and the lower winding unit 10b The yarn <NUM> includes a plurality of the yarns <NUM>, and each of the winding unit <NUM> is supplied with the plurality of yarns <NUM> arranged in the axial direction of the package <NUM>. Each of the winding unit <NUM> winds each of the plurality of yarns <NUM> to produce the plurality of package <NUM>.

The upper winding unit 10a and the lower winding unit 10b are basically provided with the same device. Therefore, the upper winding unit 10a will be described below as a representative. As illustrated in <FIG>, the upper winding unit 10a includes a frame <NUM>, a first housing <NUM>, a second housing <NUM>, and a turret plate (bobbin holder moving mechanism) <NUM>.

The frame <NUM> is a member that holds each component provided in the upper winding unit 10a. The first housing <NUM> is attached with a traverse device <NUM>. As a result of the traverse device <NUM> reciprocating in a winding width direction (axial direction of the package <NUM>) with a traverse guide <NUM> described later being engaged with the yarn <NUM>, each yarn <NUM> forwarded downstream is traversed. As illustrated in <FIG>, the traverse device <NUM> includes a traverse cam <NUM>, the traverse guide <NUM>, and a traverse motor <NUM>. <FIG> shows a block diagram of one winding unit (upper winding unit 10a or lower winding unit 10b).

The traverse cam <NUM> is a roller-shaped member arranged parallel to the bobbin <NUM>, <NUM>. A spiral cam groove is formed on an outer peripheral surface of the traverse cam <NUM>. The traverse cam <NUM> is rotationally driven by a traverse motor <NUM>.

The traverse guide <NUM> is a part that engages the yarn <NUM>. A distal end of the traverse guide <NUM> includes, for example, a substantially U-shaped guide part that engages with the yarn <NUM> while sandwiching the yarn <NUM> in the winding width direction. A proximal end of the traverse guide <NUM> is positioned in a cam groove of the traverse cam <NUM>. When the traverse cam <NUM> is rotationally driven, it is possible to reciprocate the traverse guide <NUM> in the winding width direction.

The traverse motor <NUM> is controlled by a control device <NUM>. The control device <NUM> includes a CPU, a ROM, and a RAM. The CPU executes various controls related to the upper winding unit 10a by reading a program stored in the ROM into the RAM and executing such a program.

The second housing <NUM> is rotatably attached with a contact roller <NUM>. When the yarn <NUM> is wound, the contact roller <NUM> is driven to rotate with a contact with the yarn layer of the package <NUM> with a certain pressure to form a yarn layer shape of the package <NUM> into a shape.

An operation panel <NUM> is provided on the second housing <NUM>. The operation panel <NUM> is a device operated by an operator. The operator applies an instruction to the upper winding unit 10a by operating the operation panel <NUM>. Examples of the instruction applied by the operator include starting yarn threading, starting winding, stopping winding, and changing a winding condition.

As illustrated in <FIG>, the upper winding unit 10a includes a lifting and lowering device <NUM>. The lifting and lowering device <NUM> lifts and lowers the first housing <NUM> and the second housing <NUM> altogether. Specifically, the first housing <NUM> and the second housing <NUM> are attached to an unillustrated lifting and lowering member. A ball nut <NUM> is attached to the lifting and lowering member. A screw rod <NUM> is attached to the frame <NUM>. When the screw rod <NUM> is rotated by using a lifting and lowering motor <NUM>, it is possible to lift and lower the first housing <NUM> and the second housing <NUM>. The lifting and lowering motor <NUM> is controlled by the control device <NUM>. It is noted that the lifting and lowering device <NUM> may be realized by using a cylinder instead of the ball screw.

The turret plate <NUM> is a disk-shaped member. The turret plate <NUM> is rotatably attached to the frame <NUM>. A rotation axis of the turret plate <NUM> is at a center position of the turret plate <NUM>. The turret plate <NUM> is rotationally driven by a turret motor <NUM> illustrated in <FIG>. The turret motor <NUM> is controlled by the control device <NUM>.

At two locations facing each other across the center position, within the turret plate <NUM>, a first bobbin holder <NUM> and a second bobbin holder <NUM> are each provided. The first bobbin holder <NUM> is attachable with the first bobbin <NUM> including a plurality of the first bobbins <NUM> to be aligned in the axial direction. The second bobbin holder <NUM> is attachable with the second bobbin <NUM> including a plurality of the second bobbins <NUM> to be aligned in the axial direction. When the turret plate <NUM> is rotated, it is possible to change positions of the first bobbin holder <NUM> and the second bobbin holder <NUM>. It is noted that as long as it is possible to change the positions of the first bobbin holder <NUM> and the second bobbin holder <NUM>, a different device may be used instead of the turret plate <NUM>.

The first bobbin holder <NUM> is rotatable with respect to the turret plate <NUM> with the axial position of the first bobbin holder <NUM> being the center of rotation. The first bobbin holder <NUM> is rotationally driven by a first bobbin holder motor <NUM> illustrated in <FIG>. Similarly, the second bobbin holder <NUM> is rotatable with respect to the turret plate <NUM> with the axial position of the second bobbin holder <NUM> being the center of rotation. The second bobbin holder <NUM> is rotationally driven by a second bobbin holder motor <NUM> illustrated in <FIG>. The first bobbin holder motor <NUM> and the second bobbin holder motor <NUM> are controlled by the control device <NUM>.

As illustrated in <FIG>, in a state where the first bobbin holder <NUM> and the second bobbin holder <NUM> are arranged vertically, the yarn <NUM> is wound on a first bobbin of the first bobbin holder <NUM> at a higher position to produce the package <NUM>. In the following description, a bobbin attached to the first bobbin holder <NUM> is referred to as a first bobbin <NUM>, and a bobbin attached to the second bobbin holder <NUM> is referred to as a second bobbin <NUM>.

Once a predetermined amount of yarn <NUM> has been wound on the first bobbin <NUM> attached to the first bobbin holder <NUM> and full winding of the package <NUM> has been achieved, the turret plate <NUM> rotates to switch the positions of the first bobbin holder <NUM> and the second bobbin holder <NUM>. Thereafter, while the package <NUM> in which the full winding is achieved is collected, the yarn <NUM> is wound on the second bobbin <NUM> attached to the second bobbin holder <NUM>.

The one ends (turret plate <NUM> side ends) of the bobbin holders <NUM>, <NUM> are supported to the turret plate <NUM>. The yarn winding machine <NUM> further includes a support member <NUM> that supports the other ends (the ends opposite to the turret plate <NUM>) of the bobbin holders <NUM>, <NUM> positioned for producing the package <NUM>.

As illustrated in <FIG>, the bobbin holders <NUM>, <NUM> of the upper winding upper winding unit 10a pass through the vicinity of the yarn <NUM> from the yarn feed roller <NUM> to the lower winding unit 10b by the rotation of the turret plate <NUM>. Also, the accompanying flow is generated by the rotation of the package <NUM> formed on the bobbin holders <NUM>, <NUM> of the upper winding unit 10a. A windbreak plate <NUM> is provided with the upper winding unit 10a in order to suppress the accompanying flow from acting on the yarn <NUM> wound on the lower winding unit 10b. The windbreak plate <NUM> is not provided with the lower winding unit 10b. The windbreak plate <NUM> may be omitted from the upper winding unit 10a.

Next, the yarn threading operation and the waste winding (dead winding or preliminary winding) will be described. The yarn threading operation is an operation in which the operator winds the yarn <NUM> on the bobbins <NUM>, <NUM> in a prior step to producing the package <NUM>. The waste winding is an operation to wind the yarn <NUM> having a low quality at the start of winding, which is performed after the yarn threading operation. The yarn <NUM> that has been wound up by the waste winding is discarded.

The reason why the yarn <NUM> has low quality is as follows. That is, at the step of the yarn threading by the operator, the yarn <NUM> is wound in a state in which the yarn <NUM> is not engaged with the traverse guide <NUM>. Also, the traverse guide <NUM> is driven at a lower speed than usual. Therefore, even if the yarn <NUM> is engaged with the traverse guide <NUM> after the yarn threading, the quality of the yarn <NUM> is low until the traverse guide <NUM> reaches the normal speed.

In the present embodiment, the winding width direction, the axial direction of the package <NUM>, and the axial directions of the bobbin holders <NUM>, <NUM> are all parallel. In the description below, these directions are collectively referred to simply as the "axial direction". The direction in which the yarn feed roller <NUM> is positioned with respect to the yarn winding machine <NUM> is referred to as the "height direction". In particular, the side closer to the yarn feed roller <NUM> in the height direction is referred to as an upper side, and the opposite side is referred to as a lower side. A direction perpendicular to both the axial direction and the height direction is referred to as a "direction perpendicular to the axis".

<FIG> shows the process from performing the yarn threading operation and the waste winding to starting the produce of the package <NUM>. Process from S1 to S7 is process related to the yarn threading operation, the waste winding, and preparation thereof. First, the process from S1 to S7 is performed on the upper winding unit 10a, and then the process from S1 to S7 is performed on the lower winding unit 10b. The process from S1 to S7 will be specifically described below.

First, the operator performs a predetermined first operation on the operation panel <NUM> (S1). The first operation is an operation for notifying the yarn winding machine <NUM> that the yarn threading operation is to be performed. The first operation is to operate a predetermined button on the operation panel <NUM>, for example.

By performing the first operation, the operation panel <NUM> transmits a yarn threading start signal to the control device <NUM> (S2). The yarn threading start signal is an electrical signal that is transmitted to the control device <NUM> by performing the first operation on the operation panel <NUM>. The yarn threading start signal may be referred to as a signal for threading the yarn to the first bobbin <NUM>.

By receiving the yarn threading start signal, the control device <NUM> controls the turret motor <NUM> to rotate the turret plate <NUM> counterclockwise, thereby setting the first bobbin holder <NUM> at the yarn threading position (S3, from state <NUM> to state <NUM> in <FIG>). The yarn threading position is a position of the first bobbin holder <NUM> when the operator performs the yarn threading operation.

Here, each position of the bobbin holders <NUM>, <NUM> will be described with reference to <FIG>. When the bobbin holders <NUM>, <NUM> are arranged vertically, the higher position of the bobbin holder <NUM>, <NUM> is the winding position and the lower position of the bobbin holder <NUM>, <NUM> is the standby position. The yarn winding machine <NUM> winds the yarn <NUM> on the bobbins <NUM>, <NUM> of the bobbin holders <NUM>, <NUM> at the winding position to produce the package <NUM>. The winding position is a position where the bobbins <NUM>, <NUM> of the bobbin holders <NUM>, <NUM> or the package <NUM> contacts the contact roller <NUM>. A center of rotation of the turret plate <NUM> is referred to as a point C. The position of the bobbin holders <NUM>, <NUM> (more specifically, the positions of the axes of the bobbin holders <NUM>, <NUM>) is expressed using an angle with the point C as a reference (center), as follows. That is, the winding position is <NUM>° (or <NUM>°) and the standby position is <NUM>°. As illustrated in <FIG>, the direction in which the upper winding unit 10a is offset with respect to the lower winding unit 10b is defined as the offset direction. The offset described above is an offset at the position projected on the horizontal plane (in other words, offset in plain view), and the offset direction is parallel to the direction perpendicular to the axis. A rotation direction in which an object (a bobbin holder) positioned at the winding position rotates toward (along) the offset direction (counterclockwise in <FIG>) is positive. In this embodiment, the turret plate <NUM> rotates only counterclockwise, that is, so that the positions of the bobbin holders <NUM>, <NUM> are changed only in the positive direction.

As illustrated in <FIG>, the yarn threading position in the present embodiment is at a position larger than <NUM>° and smaller than <NUM>°. If the yarn threading position is <NUM>° or more and less than <NUM>°, the yarn <NUM> contacts the contact roller <NUM>, then the yarn threading operation may fail. If the yarn threading position is <NUM>° or more and <NUM>° or less, in a situation where the turret plate <NUM> rotates counterclockwise after the yarn threading operation, the first bobbin <NUM> on which the yarn <NUM> is wound by the yarn threading operation or the yarn layer by performing the waste winding may contact with the windbreak plate <NUM> (even if there is no windbreak plate <NUM>, there is a possibility of interfering with the yarn path of the lower winding unit 10b). By changing the position of the windbreak plate <NUM> in the direction perpendicular to the axis away from the first bobbin <NUM>, contact with the windbreak plate <NUM> can be reliably prevented, but in this case, an installation area of the yarn winding machine <NUM> increases because an offset amount of the upper winding unit 10a with respect to the lower winding unit 10b. For the reasons described above, it is preferable that the yarn threading position is at a position larger than <NUM>° and smaller than <NUM>°. Also, if the bobbin holders <NUM>, <NUM> are much close to the support member <NUM> or the windbreak plate <NUM>, the yarn threading operation may become difficult. Furthermore, if the bobbin holders <NUM>, <NUM> are positioned close to the contact roller <NUM>, the possibility of contact of the yarn <NUM> and the contact roller <NUM> arises. Therefore, it is more preferable that the yarn threading position is at a position larger than <NUM>° and smaller than <NUM>°. In the present embodiment, the yarn threading position is set at <NUM>°.

After adjusting the bobbin holder <NUM> to the yarn threading position, the control device <NUM> controls the first bobbin holder motor <NUM> to rotationally drive the first bobbin <NUM> (S4). Next, the control device <NUM> drives the traverse device <NUM> at low speed (S5). The low speed of the traverse device <NUM> indicates that the traverse speed is lower than the traverse speed when producing the package <NUM>.

Next, the operator performs yarn threading operation (S6). Specifically, the operator holds the plurality of yarns <NUM> hooked on the yarn feed roller <NUM> with a suction gun or the like. Then, the operator winds the plurality of held yarn <NUM> on the bobbin holder <NUM> of the upper winding unit 10a. The upper winding unit 10a is provided with a yarn dividing guide that individually holds the plurality of yarns <NUM> while maintaining the spacing between the plurality of yarns <NUM>. The operator causes the yarns <NUM> to be held individually by the yarn dividing guide. Then, the yarn threading operation is completed. Since the first bobbin holder <NUM> has already been rotationally driven, the yarn <NUM> is wound on the first bobbin <NUM> attached to the first bobbin holder <NUM> by the completion of the yarn threading operation (waste winding, S7). State <NUM> in <FIG> shows a state in which the yarn threading operation is completed and the waste winding is being performed. Thereafter, the process from S1 to S7 is performed on the lower winding unit 10b.

After the process from S1 to S7 are performed on the upper winding unit 10a and the lower winding unit 10b, the process for starting the produce of the package <NUM> is performed. Specifically, the process from S11 to S16 in <FIG> corresponds to the process for starting the produce of the package <NUM>. First, the process from S11 to S16 is performed on the upper winding unit 10a, and then the process from S11 to S16 is performed on the lower winding unit 10b. The process from S11 to S16 will be specifically described below.

First, the operator performs a predetermined second operation to the operation panel <NUM> (S11). The second operation is an operation for notifying the yarn winding machine <NUM> of the start of producing the package <NUM>. The second operation is to operate a predetermined button on the operation panel <NUM>, for example. The first operation and the second operation may be the same operation (for example, the operation of the same button) or different operation (for example, the operation of the different button).

By performing the second operation, the operation panel <NUM> transmits a producing start signal to the control device <NUM> (S12). The producing start signal is an electrical signal that is transmitted to the control device <NUM> by performing the second operation on the operation panel <NUM>.

By receiving the producing start signal, the control device <NUM> controls the turret motor <NUM> to rotate the turret plate <NUM> counterclockwise, thereby setting the first bobbin holder <NUM> at the standby position and the second bobbin holder <NUM> at the winding position (S13, from state <NUM> in <FIG> to state <NUM> in <FIG>).

Next, the control device <NUM> switches so that the yarn <NUM> wound on the first bobbin <NUM> of the first bobbin holder <NUM> is wound on the second bobbin <NUM> of the second bobbin holder <NUM> (S14, from state <NUM> in <FIG> to state <NUM> in <FIG>). Specifically, the winding member <NUM> is pressed against the yarn <NUM> stretched between the first bobbin holder <NUM> and the second bobbin holder <NUM> to increase a winding angle of the yarn <NUM> with respect to the second bobbin <NUM>, thereby the yarn <NUM> is wound on the second bobbin <NUM> of the second bobbin holder <NUM>. In this way, switching the winding of the yarn <NUM> from the bobbin <NUM> of one bobbin holder <NUM> to the bobbin <NUM> of the other bobbin holder <NUM> is referred to as yarn switching, and the yarn switching is performed in a state where the bobbin holders <NUM>, <NUM> are positioned at the winding position and the standby position, respectively. That is, the positions where the bobbin holders <NUM>, <NUM> are at <NUM>° and <NUM>°, respectively are the yarn switching positions. The producing start signal described above is also a yarn switching signal.

Next, the control device <NUM> switches the traverse device <NUM> from low speed drive to high speed drive (S15). The high speed of the traverse device <NUM> indicates that the traverse speed is higher than the traverse speed when performing the yarn threading and the traverse speed when producing the package <NUM>. Thereafter, the control device <NUM> controls the lifting and lowering motor <NUM> to lower the traverse device <NUM> and the contact roller <NUM> (S16, state <NUM> in <FIG>). Thereby, the contact roller <NUM> contacts with the second bobbin <NUM> of the second bobbin holder <NUM>, and the produce of the package <NUM> is started. Thereafter, when the package <NUM> of the second bobbin <NUM> becomes a fully wound package <NUM> with a predetermined diameter, a yarn switching signal is generated and transmitted, the yarn switching is performed, and the turret plate <NUM> is moved so that the package <NUM> is formed on the first bobbin <NUM> of the first bobbin holder <NUM>. The details of above the process will be described later. After that, formation of a fully wound package <NUM>, the yarn switching, and the replacement of the fully wound package <NUM> with new bobbins <NUM>, <NUM> are continuously repeated.

In the present embodiment, from a timing when the first bobbin holder <NUM> is positioned at the yarn threading position to a timing when the package <NUM> is produced by winding the yarn <NUM> on the second bobbin <NUM> of the second bobbin holder <NUM>, the turret plate <NUM> rotates so that the positions of the bobbin holders <NUM>, <NUM> are changed only in the positive direction. Therefore, control of the turret plate <NUM> is simple. Also, since the bobbin holder <NUM> does not come close to the windbreak plate <NUM> until the bobbin holder <NUM> reaches the standby position from the yarn threading position, the contact between the first bobbin holder <NUM> which the yarn <NUM> is wound by the yarn threading operation or the yarn layer of the waste winding and the windbreak plate <NUM> can be suppressed more reliably. In the present embodiment, the turret plate <NUM> rotates so that the positions of the bobbin holders <NUM>, <NUM> are changed only in the positive direction, and the yarn switching is performed in a state where the first bobbin holder <NUM> and the second bobbin holder <NUM> are positioned at <NUM>° and <NUM>°, respectively. Therefore, the fully wound package <NUM> does not come close to the windbreak plate <NUM>, and this also makes it possible to suppress the amount by which the upper winding unit 10a is offset with respect to the lower winding unit 10b.

Next, a modification of the above embodiment will be described with reference to <FIG>, <FIG> and <FIG>. Only the control of the turret plate <NUM> is different between the above embodiment and this modification, and the configuration of the yarn winding machine <NUM> is otherwise the same.

In the above embodiment, the yarn winding machine <NUM> performs the waste winding at the yarn threading position. Instead of that, in this modification, the yarn threading position and the waste winding position are different. Specifically, as illustrated in <FIG>, the waste winding position in this modification is a <NUM>° position. The waste winding position may be larger than <NUM>° and smaller than <NUM>°. In a case where the yarn threading position and the waste winding position are the same, if time of the waste winding is long, the yarn layer becomes large, and there is a possibility that the yarn layer and the windbreak plate <NUM> come into contact with each other. In this regard, since the waste winding position in this modification is far from the windbreak plate <NUM>, contact between the yarn layer and the windbreak plate <NUM> can be more reliably prevented. In this modification, the reason why the waste winding position is set to the <NUM>° position is as follows. That is, the positioning mechanisms of the turret plate <NUM> for positioning at each of the winding position, the standby position, and the yarn switching position are provided, in the same way, another positioning mechanism for positioning at the yarn threading position is required. Since the waste winding position is set at <NUM>°, the waste winding position is opposite to the yarn threading position across the point C which is the center of rotation of the turret plate <NUM>, and there is no need to provide a new positioning mechanism.

Hereinafter, process of this modification will be described with reference to <FIG> and <FIG>. Since the process from S1 to S6 in <FIG> are the same as those in the above embodiment, description of these process is omitted.

The operator performs a predetermined third operation on the operation panel <NUM> after the yarn threading operation (S7). The third operation is an operation for notifying the yarn winding machine <NUM> that the yarn threading operation is completed. The third operation is to operate a predetermined button on the operation panel <NUM>, for example.

By performing the third operation, the operation panel <NUM> transmits a yarn threading completion signal to the control device <NUM> (S8). The yarn threading completion signal is an electrical signal that is transmitted to the control device <NUM> by performing the third operation on the operation panel <NUM>.

By receiving the yarn threading completion signal, the control device <NUM> controls the turret motor <NUM> to rotate the turret plate <NUM> counterclockwise, thereby setting the first bobbin holder <NUM> at the waste winding position (S9, from state 3A to state 3B in <FIG>). As a result, the waste winding is continuously performed at the waste winding position (S10).

Next, with reference to <FIG>, the process of newly winding yarn <NUM> on the first bobbin <NUM> after the fully wound package <NUM> is formed on the second bobbin <NUM> will be described.

When the fully wound package <NUM> is formed, the control device <NUM> controls the turret motor <NUM> to rotate the turret plate <NUM> counterclockwise, thereby setting the first bobbin holder <NUM> at the first switching position and the second bobbin holder <NUM> at the second switching position (from state A in <FIG> to state B in <FIG>). The first switching position and the second switching position are positions of the bobbins <NUM>, <NUM> when switching the bobbins <NUM>, <NUM> for winding the yarn <NUM>. Specifically, the first switching position is a position of the bobbin on which winding of the yarn <NUM> is newly started (in other words, a bobbin on which the yarn <NUM> is not wound, the first bobbin <NUM>). The second switching position is a position of the bobbin (second bobbin <NUM>) of the fully wound package <NUM>. A preferable angular range of the first switching position will be described later.

Next, the control device <NUM> switches so that the yarn <NUM> wound on the second bobbin <NUM> (package <NUM>) is wound on the first bobbin <NUM> (from state C in <FIG> to state D in <FIG>). The specific process is the same as the yarn switching at the time of waste winding described above. The fully wound package <NUM> of the second bobbin <NUM> is removed from the second bobbin holder <NUM>, and a new second bobbin <NUM> (the second bobbin <NUM> on which the yarn <NUM> is not wound) is attached to the second bobbin holder <NUM>. The turret plate <NUM> rotates only in the same direction (positive direction) from a timing when the fully wound package <NUM> is formed on the second bobbin <NUM> to a timing when the yarn <NUM> is newly wound on the first bobbin.

Next, the control device <NUM> controls the lifting and lowering motor <NUM> to lower the traverse device <NUM> and the contact roller <NUM> (state E in <FIG>). Thereby, the contact roller <NUM> contacts with the first bobbin <NUM>, and the produce of the package <NUM> is started.

Next, a preferable angular range of the first switching position will be described with reference to <FIG>.

As illustrated in <FIG>, the first switching position is preferably a position within ±<NUM>° with respect to <NUM>°. If the first switching position is <NUM>° or more alternatively <NUM>° or less, the second switching position is <NUM>° or more alternatively <NUM>° or less, and the fully wound package <NUM> closes to a yarn path to the lower winding unit 10b. Therefore, in order to prevent interference between the fully wound package <NUM> and the yarn path, an offset amount of the upper winding unit 10a with respect to the lower winding unit 10b is increased, so the installation area of the yarn winding machine <NUM> is increased. Therefore, it is not preferable that the first switching position is <NUM>° or more and <NUM>° or less.

When the first switching position is <NUM>° or more alternatively <NUM>° or less, it becomes difficult to wind the yarn <NUM> connected to the fully wound package <NUM> on the first bobbin <NUM>. Therefore, it is not preferable that the first switching position is <NUM>° or more and <NUM>° or less.

As described above, the first switching position is preferably a position within ±<NUM>° with respect to <NUM>°. When the first switching position is not <NUM>°, after switching so that the yarn <NUM> wound on the second bobbin <NUM> is wound on the first bobbin <NUM>, the control device <NUM> controls the turret motor <NUM> and rotates the turret plate <NUM> to set first bobbin holder <NUM> at <NUM>° position (winding position). That is, when the first switching position is larger than <NUM>° and smaller than <NUM>°, the control device <NUM> rotates the turret plate <NUM> counterclockwise (positive direction) after the switching. On the other hand, when the first switching position is larger than <NUM>° and smaller than <NUM>°, the control device <NUM> rotates the turret plate <NUM> clockwise (opposite direction) after the switching. After that, the upper winding unit 10a winds the yarn <NUM> on the first bobbin <NUM> to produce the package <NUM>.

As described above, the yarn winding machine <NUM> of this embodiment includes the lower winding unit 10b and the upper winding unit 10a. The lower winding unit 10b winds the yarn <NUM> fed from the yarn feed roller <NUM> to produce the package <NUM>. The upper winding unit 10a is arranged at a higher position than the lower winding unit 10b and at an offset position perpendicular to the axial direction of the package <NUM> with respect to the lower winding unit 10b in the plan view, the upper winding unit 10a winds the yarn <NUM> fed from the yarn feed roller <NUM> to produce the package <NUM>. The upper winding unit 10a includes the first bobbin holder <NUM>, the second bobbin holder <NUM>, turret plate <NUM>, and the contact roller <NUM>. The first bobbin holder <NUM> holds the first bobbin <NUM>. The second bobbin holder <NUM> holds the second bobbin <NUM>. The first bobbin holder <NUM> and the second bobbin holder <NUM> are attached to the turret plate <NUM>, and the turret plate <NUM> changes the position of the first bobbin holder <NUM> and the second bobbin holder <NUM> by rotating around the rotation axis parallel to the axial direction of the package <NUM>. The contact roller <NUM> rotates in contact with the first bobbin <NUM>, the second bobbin <NUM>, or the package <NUM> when producing the package <NUM>. With relation to the position in which the turret plate <NUM> holds the first bobbin holder <NUM> or the second bobbin holder <NUM>, the position where the first bobbin <NUM>, the second bobbin <NUM>, or the package <NUM> contact with the contact roller <NUM> and the yarn is wound on the first bobbin <NUM> or the second bobbin <NUM> to produce the package <NUM> is defined as <NUM>° or <NUM>°, the rotation direction of rotating from the <NUM>° toward the offset direction in which the upper winding unit 10a is offset with respect to the lower winding unit 10b is defined as positive, and the turret plate <NUM> sets the position of the first bobbin holder <NUM> to the position larger than <NUM>° and smaller than <NUM>° by receiving the signal for threading the yarn <NUM> to the first bobbin <NUM> (yarn threading start signal).

As a result, the offset amount in which the upper winding unit 10a is offset with respect to the lower winding unit 10b can be reduced, and the installation area of the yarn winding machine <NUM> can be reduced.

In the yarn winding machine <NUM> of the present embodiment, the turret plate <NUM> receives the signal for threading the yarn <NUM> on the first bobbin <NUM> and sets the position of the first bobbin holder <NUM> to the position larger than <NUM>° and smaller than <NUM>°.

As a result, the yarn threading of the upper winding unit 10a can be performed at a position farther from the yarn path of the lower winding unit 10b and at a position where the possibility of contact between the yarn <NUM> and the contact roller <NUM> is further reduced.

In the yarn winding machine <NUM> of the present embodiment, after receiving the signal for performing the yarn switching (the yarn switching signal) in which when the yarn <NUM> is wound on the first bobbin <NUM>, the yarn <NUM> is wound on the second bobbin <NUM>, or when the thread <NUM> is wound on the second bobbin <NUM>, the yarn <NUM> is to be wound on the first bobbin <NUM>, the turret plate <NUM> sets the position of one of the first bobbin holder <NUM> and the second bobbin holder <NUM> to <NUM>° and sets the other position to <NUM>°.

As a result, when performing the yarn switching in which after threading the yarn <NUM> on the first bobbin <NUM>, the yarn wound on the first bobbin <NUM> is wound on the second bobbin <NUM>, or the yarn switching in which after producing the package <NUM>, the yarn wound on the fully wound package <NUM> of the first bobbin <NUM> or the second bobbin <NUM> is wound on the second bobbin <NUM> or the first bobbin <NUM> which is not wound the yarn <NUM>, the yarn switching can be performed in a state where the first bobbin <NUM> and the second bobbin <NUM> are positioned far from the yarn path of the lower winding unit 10b.

In the yarn winding machine <NUM> of the present embodiment, from the state where the yarn <NUM> is threaded on the first bobbin <NUM> to the state where the yarn <NUM> is wound on the second bobbin <NUM> to produce the package <NUM>, the turret plate <NUM> rotates so that the positions of the first bobbin holder <NUM> and the second bobbin holder <NUM> are changed only in the positive direction.

Control of the turret plate <NUM> can be simplified. In addition, since the first bobbin <NUM> on which the yarn layer is formed by waste winding does not pass through the area of the lower winding unit 10b near the yarn path, the offset amount can be reduced.

In the yarn winding machine <NUM> of the present embodiment, by receiving the signal for threading the yarn <NUM> on the first bobbin <NUM>, the position of the first bobbin holder <NUM> is set to the position larger than <NUM>° and smaller than <NUM>°, and then by receiving the signal indicating the completion of the operation of threading the yarn <NUM> to the first bobbin <NUM> (the yarn threading completion signal), the position of the first bobbin holder <NUM> is set to the position greater than <NUM>° and less than <NUM>°.

As a result, it is possible to prevent the first bobbin <NUM> from being wound thicker at a position greater than <NUM>° and less than <NUM>°, so that the first bobbin <NUM> or its yarn layer is less likely to interfere with the yarn path of the lower winding unit 10b.

In the yarn winding machine <NUM> of the present embodiment, the upper winding unit 10a includes the windbreak plate <NUM> for preventing the accompanying flow generated by the rotation of the package <NUM> formed on the first bobbin holder <NUM> or the second bobbin holder <NUM> from affecting the yarn wound at the lower winding unit 10b.

By providing the windbreak plate <NUM>, the influence of the accompanying flow on the yarn <NUM> can be reduced.

In the yarn winding machine <NUM> of the present embodiment, when the package <NUM> formed on the second bobbin <NUM> is fully wound, in a state where the turret plate <NUM> sets the position of the first bobbin holder <NUM> to the position of less than ±<NUM>° with respect to <NUM>°, the yarn <NUM> wound on the second bobbin <NUM> is switched to be wound on the first bobbin <NUM>.

As a result, the fully wound package <NUM> does not pass through a range close to the yarn path to the lower winding unit 10b. Therefore, it is possible to further reduce the offset amount of the upper winding unit 10a. In addition, the operation of winding the yarn <NUM> connected to the package <NUM> on the first bobbin <NUM> can be easily performed.

Although a preferred embodiment of the present invention has been described above, the above-described configuration can be modified, for example, as follows.

Although the traverse device <NUM> of the above embodiment is of cam drum type, the traverse device <NUM> may have a different configuration as long as it is possible to reciprocate the traverse guide <NUM> in the winding width direction. For example, instead of the traverse device <NUM>, a belt-type traverse device may be used.

Claim 1:
A yarn winding machine, comprising:
a lower winding unit (10b) which winds a yarn (<NUM>) fed from a yarn feed roller (<NUM>) to produce a package (<NUM>); and
an upper winding unit (10a) which is arranged at a higher position than the lower winding unit (10b) and at an offset position perpendicular to an axial direction of the package (<NUM>) with respect to the lower winding unit (10b) in the plan view, and winds the yarn (<NUM>) fed from the yarn feed roller (<NUM>) to produce the package (<NUM>),
wherein the upper winding unit (10a) comprising:
a first bobbin holder (<NUM>) which holds the first bobbin (<NUM>);
a second bobbin holder (<NUM>) which holds the second bobbin (<NUM>);
a bobbin holder moving mechanism (<NUM>) to which the first bobbin holder (<NUM>) and the second bobbin holder (<NUM>) are attached, and changes a position of the first bobbin holder (<NUM>) and the second bobbin holder (<NUM>) by rotating around a rotation axis parallel to the axial direction of the package (<NUM>); and
a contact roller (<NUM>) which rotates in contact with the first bobbin (<NUM>), the second bobbin (<NUM>), or the package (<NUM>) when producing the package (<NUM>),
characterized in that with relation to a position in which the bobbin holder moving mechanism (<NUM>) holds the first bobbin holder (<NUM>) or the second bobbin holder (<NUM>), a position where the first bobbin (<NUM>), the second bobbin (<NUM>), or the package (<NUM>) contact with the contact roller (<NUM>) and the yarn (<NUM>) is wound on the first bobbin (<NUM>) or the second bobbin (<NUM>) to produce the package (<NUM>) is defined as <NUM>° or <NUM>°,
a rotation direction of rotating from <NUM>° toward an offset direction in which the upper winding unit (10a) is offset with respect to the lower winding unit (10b) is defined as positive, and
the bobbin holder moving mechanism (<NUM>) sets the position of the first bobbin holder (<NUM>) to a position larger than <NUM>° and smaller than <NUM>° by receiving a signal for threading the yarn (<NUM>) to the first bobbin (<NUM>).