Wooden member fabrication method
AssigneesKabushiki Kaisha Tokai Rika Denki Seisakusho, Aichi Prefecture
InventorsKentaro Hayashi, Yasuo Takasu, Satoshi Fukuta
Life of this patent
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Abstract
A wooden member fabrication method which, by a simple process, can enable greater stability of shape subsequent to processing and uniformity of color tone. A wooden original piece with a long form has a hole thereinside which extends in the length direction. Corner portions are chamfered and radial direction thicknesses are substantially constrained to a certain range. An outer periphery of this wooden original piece is compression-deformed in directions toward an axial central portion and the outer periphery is thus made an arc surface. Because of the chamfering, radial direction thicknesses of the wooden original piece are constrained, and differences by location between compression ratios can be suppressed.
Claims18
A wooden member fabrication method comprising the sequential steps of:
- providing a wooden member original with a long form and including a hole inside which extends in a length direction, the wooden member including a cross-section perpendicular to the length direction which is substantially a rectangle having corner portions;
- chamfering said corner portions of the wooden member such that said wooden member has a polygonal cross-section for avoiding breakage of the wooden member during a compression deforming step;
- and
- compression-deforming the chamfered wooden member original in directions toward a center of the cross-section, for making an outer periphery of the wooden member original an arcuate surface.
A wooden member fabrication method comprising the sequential steps of:
- providing a wooden member original with a long form and including a substantially rectangular cross-section;
- dividing the wooden member original into two segments by a plane which passes along a length direction through a substantial center of the cross-section;
- forming, at a divided face of each of the two segments, a channel which extends along the length direction;
- chamfering corner portions of the wooden member original along the length direction such that said cross-section is polygonal, wherein said chamfering step constrains thicknesses of the wooden member original to within a predetermined range such that in the cross-section, a thickness dimension of a largest portion is at most 1.85 times a thickness dimension of a smallest portion for avoiding breakage of the wooden member during a compression deforming step;
- and
- pressing and joining the two segments such that the divided faces are matched up.
A method for fabricating a wooden member for covering a vehicle steering wheel, the method comprising the sequential steps of:
- providing a wooden member original with a long form and including a hole inside which extends in a length direction, the wooden member including a cross-section perpendicular to the length direction which is substantially a rectangle, chamfering corner portions of said rectangular cross-section such that in cross-section, a thickness dimension of a largest portion is at most 1.85 times a thickness dimension of a smallest portion for avoiding breakage of the wooden member during a compression deforming step, wherein the thicknesses are defined by dimensions of thickness of the wooden member original along straight lines from a substantial center of the cross-section toward any location at the outer periphery of the cross-section, and wherein the angles at portions which are chamfered are at least 120° and at most 150°;
- and
- compression-deforming the wooden member original in directions toward a center of the cross-section, for making an outer periphery of the wooden member original an arcuate surface.
Dependencies are inferred from the claim text.