Method for yaw oscillation of fiber unwinding bobbin

Abstract

To provide a method for yaw oscillation of a fiber unwinding bobbin that allows for miniaturization of the equipment. [Solution] The yaw oscillation method for a fiber unwinding bobbin uses a fiber unwinding bobbin having a cylindrical bobbin that is rotatable for unwinding, a pivot base that rotatably holds the bobbin and is pivotable, a pivot axis of the pivot base, a base part that fixes the pivot axis, a stopper for stopping the rotation, and a spring part for providing a reaction force, such as a spring, that assists in the return after rotation. The cylindrical bobbin is rotated in accordance with the movement of the fiber unwinding position toward the end of the cylindrical bobbin (b), and when the fiber unwinding position reaches the end of the cylindrical bobbin, the pivot reaction force spring and the rotation moment due to unwinding are balanced (c), and when the fiber unwinding position begins to return to the center of the cylindrical bobbin, the reaction force of the spring rotates the cylindrical bobbin in the opposite direction (d).

Description

Technical Field

[0001] The present invention relates to a yawing method for a fiber unwinding bobbin.

Background Art

[0002] Patent Document 1 describes a method of unwinding a material from a spool by sliding a bobbin in accordance with the fiber to be unwound so as to suppress the detachment angle to 0 ± 20 degrees.

Prior Art Document

Patent Document

[0003] [[ID=I21]]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, there is a problem that a space for sliding the bobbin is required, and the equipment needs to be enlarged. Also, when using the force of the fiber to be unwound, there is a problem that sufficient tension for sliding is required.

Means for Solving the Problems

[0005] A yawing method for a fiber unwinding bobbin according to an embodiment is configured to have a turning axis about which a cylindrical bobbin turns.

Effects of the Invention

[0006] According to the yawing method for a fiber unwinding bobbin of the present disclosure, the equipment can be miniaturized.

Brief Description of the Drawings

[0007] [Figure 1] It is a perspective view of a fiber unwinding bobbin used in the yawing method for a fiber unwinding bobbin according to Embodiment 1. [Figure 2]This is a top view showing an example of a yaw oscillation method for a fiber unwinding bobbin according to Embodiment 1. [Modes for carrying out the invention]

[0008] Embodiment 1 Embodiments of the present invention will be described below with reference to the drawings. Figure 1 is a perspective view of a fiber unwinding bobbin used in the yaw oscillation method of a fiber unwinding bobbin according to Embodiment 1.

[0009] In Figure 1, the fiber unwinding bobbin 10 comprises a cylindrical bobbin 11, a swivel base 12, a swivel shaft 13, a base portion 14, a swivel stopper 15, and a reaction force spring portion 16.

[0010] The cylindrical bobbin 11 is a bobbin on which fibers are wound. The cylindrical bobbin 11 is rotatable for unwinding the fibers.

[0011] The swivel base 12 is a base that rotatably holds the cylindrical bobbin 11. The swivel base 12 is also configured to allow the cylindrical bobbin 11 to swing in the direction of fiber winding (x-axis direction).

[0012] The pivot axis 13 is the axis that rotates the pivot base 12 with the z-axis as the axis of rotation.

[0013] The base portion 14 is a base for fixing the pivot axis 13.

[0014] The rotation-preventing stopper 15 is a stopper that limits the rotation of the z-axis of the swivel base 12 to within an acceptable range.

[0015] The reaction spring section 16 is a spring that assists the return of the pivot base 12 after it has pivoted.

[0016] As the unwinding position of the fiber moves toward the end of the cylindrical bobbin 11, the cylindrical bobbin 11 is rotated. When the unwinding position of the fiber reaches the end of the cylindrical bobbin 11, the force of the reaction spring portion 16 and the turning moment due to unwinding are balanced.

[0017] When the unwinding position of the fiber starts to return to the center of the cylindrical bobbin 11, it is rotated in the direction opposite to the fiber unwinding direction by the reaction force of the reaction spring portion 16.

[0018] Next, a method for yaw oscillation of the fiber unwinding bobbin will be described. FIG. 2 is a top view showing an example of a method for yaw oscillation of the fiber unwinding bobbin according to Embodiment 1.

[0019] As shown in FIG. 2(a), when the winding position of the fiber is at the center of the cylindrical bobbin 11, the fiber is unwound as it is.

[0020] As shown in FIG. 2(b), the cylindrical bobbin 11 is rotated as the unwinding position of the fiber moves toward the end of the cylindrical bobbin 11.

[0021] As shown in FIG. 2(c), when the unwinding position of the fiber reaches the end of the cylindrical bobbin 11, the turning reaction spring and the turning moment due to unwinding are balanced.

[0022] As shown in FIG. 2(d), when the unwinding position of the fiber starts to return to the center of the cylindrical bobbin 11, the cylindrical bobbin 11 is rotated in the direction opposite to that in FIG. 2(b) by the reaction force of the spring.

[0023] As shown in FIG. 2, since the cylindrical bobbin 11 has a turning axis 13 around which it turns, the cylindrical bobbin 11 turns in accordance with the movement of the unwinding position of the fiber. As a result, the direction of the fiber being detached can be maintained in a state close to 0° (90° with respect to the cylindrical bobbin 11).

[0024] As described above, the yaw oscillation method for the fiber unwinding bobbin of Embodiment 1 eliminates the need for space in the longitudinal direction of the bobbin, allowing for miniaturization of the equipment. Furthermore, in the case of driving using the unwinding force, the direction of the unwinding force and the direction of the force required for rotation coincide. As a result, unwinding is possible even with low tension, and it can be applied to fibers with low strength.

[0025] Furthermore, by providing a pivoting shaft on the bobbin from which the fibers are unwound, the bobbin is made to oscillate, reducing the fiber release angle. This reduces fiber slippage at the unwinding end and prevents fiber breakage.

[0026] Furthermore, the rotation reduces the angle of fiber detachment (the amount of deviation from perpendicular to the bobbin), thereby reducing slippage.

[0027] It should be noted that the present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from the spirit of the invention. [Explanation of Symbols]

[0028] 10 Fiber unwinding bobbins 11 Cylindrical bobbin 12 Swivel Base 13. Swivel axis 14 Base section 15. Swivel stopper 16. Reaction spring section

Claims

[Claim 1] A fiber unwinding bobbin is used, which has a cylindrical bobbin that is rotatable for unwinding, a pivoting base that rotatably holds the bobbin and is pivotable, a pivoting shaft of the pivoting base, a base part that fixes the pivoting shaft, a stopper for preventing rotation, and a spring part for providing a reaction force, such as a spring, to assist in the return after rotation. A method for yaw oscillation of a fiber unwinding bobbin, in which the cylindrical bobbin is rotated in accordance with the movement of the fiber unwinding position toward the end of the cylindrical bobbin, and when the fiber unwinding position reaches the end of the cylindrical bobbin, the rotational reaction force spring and the rotational moment due to unwinding are balanced, and as the fiber unwinding position begins to return to the center of the cylindrical bobbin, the reaction force of the spring rotates the cylindrical bobbin in the opposite direction.

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