Structural member, structural member manufacturing method, and structural member manufacturing device

A structural member manufacturing method that is made of a metal material sheet, and includes

• a first region extending to intersect with a third direction among a first direction, a second direction, and the third direction that are orthogonal to each other;
• a first ridge connected to the first region and extending in the second direction;
• an inclined portion connected to the first region through the first ridge in the first direction and inclined with respect to the first region;
• a second ridge formed at an end portion of the inclined portion on a side opposite to the first region in the first direction and extending along the second direction;
• and
• a second region connected through the second ridge and extending to intersect with the third direction,
• in which in the inclined portion,
• an intersection angle with the third direction in a first plane that is defined by the first direction and the third direction changes according to a position in the second direction, and
• an intersection angle with the first direction in a second plane that is defined by the first direction and the second direction changes according to a position in the second direction,
• the inclined portion includes
• a pair of second inclined portions, each of which is located on each side of both end portion sides in the second direction,
• a pair of third inclined portions, each of which is connected to each of the pair of second inclined portions, and
• a first inclined portion which is connected to both of the pair of third inclined portions,
• an intersection angle with the third direction of each of the pair of third inclined portions is in a range between an intersection angle with the third direction of the first inclined portion and an intersection angle with the third direction of each of the pair of second inclined portions, the first ridge has a convex shape whose center portion protrudes in a direction of the first region, and
• the second ridge has a convex shape whose center portion protrudes to a side opposite to the second region,
• the method comprising:
• a first process of restraining the first region by a first restraining part;
• a second process of restraining the second region by a second restraining part;
• and
• a third process of forming the inclined portion by relatively moving the first restraining part and the second restraining part in a direction in which the first restraining part and the second restraining part are separated from each other, along a smaller intersection angle of two intersection angles of an intersection angle with the third direction of the first inclined portion and an intersection angle with the third direction of each of the pair of second inclined portions.

A structural member manufacturing device that is made of a metal material sheet, and includes

• a first region extending to intersect with a third direction among a first direction, a second direction, and the third direction that are orthogonal to each other;
• a first ridge connected to the first region and extending in the second direction;
• an inclined portion connected to the first region through the first ridge in the first direction and inclined with respect to the first region;
• a second ridge formed at an end portion of the inclined portion on a side opposite to the first region in the first direction and extending along the second direction;
• and
• a second region connected through the second ridge and extending to intersect with the third direction,
• in which in the inclined portion,
• an intersection angle with the third direction in a first plane that is defined by the first direction and the third direction changes according to a position in the second direction, and
• an intersection angle with the first direction in a second plane that is defined by the first direction and the second direction changes according to a position in the second direction,
• the inclined portion includes
• a pair of second inclined portions, each of which is located on each side of both end portion sides in the second direction,
• a pair of third inclined portions, each of which is connected to each of the pair of second inclined portions, and
• a first inclined portion which is connected to both of the pair of third inclined portions,
• an intersection angle with the third direction of each of the pair of third inclined portions is in a range between an intersection angle with the third direction of the first inclined portion and an intersection angle with the third direction of each of the pair of second inclined portions,
• the first ridge has a convex shape whose center portion protrudes in a direction of the first region, and
• the second ridge has a convex shape whose center portion protrudes to a side opposite to the second region,
• the device comprising:
• a first clamping part having a first lower clamping member and a second upper clamping member that are disposed to face each other and are opened and closed;
• a second clamping part having a third lower clamping member and a fourth upper clamping member that are disposed to face each other with respect to the first lower clamping member and the second upper clamping member and are opened and closed;
• and
• clamping part driver for allowing the first clamping part and the second clamping part to relatively move in a direction in which the first clamping part and the second clamping part are separated from each other, along a smaller intersection angle of two intersection angles of an intersection angle with the third direction of the first inclined portion and an intersection angle with the third direction of each of the pair of second inclined portions.