1. A yarn winding device, comprising:
a rotation support section to which a winding member is attached;
a yarn guide section configured to guide the yarn to the winding member, the yarn guide section having a traverse drum; and
a lever member configured to move between a non-restriction position at which the lever member does not restrict a movable position of the yarn in a rotational axis direction of the traverse drum to guide the yarn to the traverse drum with a predetermined traverse width, and a restriction position at which the lever member restricts the movable position of the yarn in the rotational axis direction of the traverse drum to supply the yarn to the traverse drum with a traverse width narrower than the predetermined traverse width, thereby guiding the yarn to different traverse grooves of the traverse drum between the restriction position and the non-restriction position wherein yarn winding operations with different widths are repeated to perform a step forming winding or a yarn winding operation with a traverse width narrower than the predetermined traverse width is continuously effected to perform a yarn winding with a traverse width narrower than the predetermined traverse width.
2. The yarn wingding device as claimed in claim 1, wherein
the lever member includes a plurality of lever members provided corresponding to different positions in a rotational axis direction of the traverse drum.

3. The yarn wingding device as claimed in claim 1 or 2, further
comprising:
a driving section configured to drive the lever member; and
a control section configured to control the driving section, wherein
the control section controls the driving section to perform a set of the following steps alternately:
a step of locating the lever member at the restriction position to guide the yarn to the traverse drum with a traverse width narrower than the predetermined traverse width; and
a step of locating the lever member at the non-restriction position to guide the yarn to the traverse drum with the predetermined traverse width.
4. The yarn winding device as claimed in claim 3, wherein
the control section executes the steps depending on predetermined winding pattern information.
5. The yarn winding device as claimed in one of claims 1 to 4,
wherein
traverse grooves of the traverse drum include a first groove extending so as to widen a path of the yarn toward a first side in a width direction of the traverse drum, and a second groove extending so as to narrow a path of the yarn toward a second side in a width

direction of the traverse drum, the second groove intersecting the first groove to define an intersection,
wherein the yarn travelling along the first groove passes the intersection and continues to travel along the first groove when the lever member is positioned at the non-restriction position,
wherein the yarn travelling along the first groove shifts to the second groove at the intersection and continues to travel along the second groove when the lever member is positioned at the restriction position.
6. The yarn winding device as claimed in one of claims 1 to 5,
wherein
the rotation support section includes a pair of support sections, and an adaptor that can be detachably attached to at least one of the pair of support sections and supports an end of the winding member.
7. The yarn winding device as claimed in claim 3, wherein
the control section controls the driving section such that the yarn includes a first portion and a second portion arranged with each other in a longitudinal direction of the winding member, the second portion has a diameter larger than that of the first portion, and the yarn includes a first yarn layer wound at the first portion and the second portion with a first width from a reference end of the winding member, and a second yarn layer layered alternately with the first yarn layer, the second yarn layer is wound only at the second portion

with a second width from the reference end of the winding member narrower than the first width.
8. The yarn winding device as claimed in claim 7, wherein
the control section controls the driving section such that the yarn includes a third portion arranged with the second portion in the longitudinal direction of the winding member, the yarn includes a third yarn layer alternately layered with the first yarn layer and the second yarn layer, and the third layer is wound only at the third portion with a third width from the reference end of the winding member narrower than the second width.
9. The yarn winding device as claimed in claim 8, wherein
the control section controls the driving section such that a ratio of traverse number of the first yarn layer, the second yarn layer, and third yarn layer is 2: 3: 4.
10. The yarn winding device as claimed in claim 9, wherein
the control section controls the driving section such that a drum winding number for forming the first yarn layer, the second yarn layer, and the third yarn layer are 2.5w: 2.0w: 1.5w and the widths of the first yarn layer, the second yarn layer, and the third yarn layer are 6 inches: 4 inches: 3 inches, respectively.

11. The yarn winding device as claimed in claim 8, wherein the control section controls the driving section such that a ratio of a traverse number of the first yarn layer, the second yarn layer, and the third yarn layer is 1: 2: 2.
12. The yarn winding device as claimed in claim 11, wherein
the control section controls the driving section such that a drum winding number for forming the first yarn layer, the second yarn layer, and the third yarn layer are 2.0w: 1.5w: 1.5w, and the widths of the first yarn layer, the second yarn layer, and the third yarn layer are 4 inches: 3.8 inches: 3 inches, respectively.
13. A yarn winding method performed by a yarn winding device
including a support rotation section to which a winding member is
attached, a yarn guide section having a traverse drum and configured
to guide the yarn to the winding member, a lever member configured to
move between a non-restriction position at which the lever member
does not restrict a movable position of the yarn in a rotational axis
direction of the traverse drum to guide the yarn to the traverse drum
with a predetermined traverse width, and a restriction position at
which the lever member restricts the movable position of the yarn in
the rotational axis direction of the traverse drum to supply the yarn to
the traverse drum with a width narrower than the predetermined
traverse width, the method repeatedly performing the following steps
alternately to realize a step forming winding:
a first step of locating the lever member at the restriction position to guide the yarn to the traverse drum with a width narrower

than the predetermined traverse width; and
a second step of locating the lever member at the non-restriction position to guide the yarn to the traverse drum with the predetermined traverse width, thereby guiding the yarn to a traverse groove of the traverse drum different in the first step or continuously performing the first step to realize a winding width narrower than the predetermined traverse width.