Interior material for vehicles, comprising subsidiary part

A vehicle interior component comprising:

• a base portion in which a trench is formed;
• a skin portion made of freely-flexible material, which is wrapped around the base portion;
• a seam allowance portion that, with a main seam, is stitched onto the skin portion along a seam allowance portion centerline;
• an auxiliary portion that is interposed between the seam allowance portion and the trench and that combines the seam allowance portion with the trench;
• and
• a decoration seam that is formed in the skin portion in a manner that is positioned at a fixed distance from the seam allowance portion or the seam allowance portion centerline,
• when the auxiliary portion is inserted into the trench, the auxiliary portion is bent in a direction that is the same as a direction of extension of the trench;
• the auxiliary portion causes at least one of a direction of extension of the seam allowance portion, a direction of extension of the seam allowance portion centerline, and a direction of extension of the decoration seam to be the same as the direction of the extension of the trench;
• and
• a second wind portion that, with the main seam, is stitched onto the seam allowance portion is provided on the auxiliary portion.

A vehicle interior component comprising:

• a base portion in which a trench is formed;
• a skin portion that is wrapped around the base portion;
• a seam allowance portion that, with a main seam, is stitched onto the skin portion along a seam allowance portion centerline;
• an auxiliary portion that is interposed between the seam allowance portion and the trench and that combines the seam allowance portion with the trench;
• and
• a decoration seam that is formed in the skin portion in a manner that is positioned at a fixed distance from the seam allowance portion or the seam allowance portion centerline,
• wherein, when the auxiliary portion is inserted into the trench, the auxiliary portion is bent in a direction that is the same as a direction of extension of the trench;
• the auxiliary portion causes at least one of a direction of extension of the seam allowance portion, a direction of extension of the seam allowance portion centerline, and a direction of extension of the decoration seam to be the same as the direction of the extension of the trench;
• a groove into which the seam allowance portion is to be inserted is provided in the auxiliary portion;
• the skin portion includes a first sheet and a second sheet that are in a state of being separated from each other before being stitched onto each other with the main seam;
• when with the main seam, the first sheet and the second sheet are stitched onto each other, a first end portion that corresponds to an edge portion of the first sheet is bent in such a manner as to be inserted from the first sheet into the groove in the arbitrary portion, and a second end portion that corresponds to an edge portion of the second sheet is bent in such a manner as to be inserted from the second sheet into the groove in the auxiliary portion;
• a first surface of the first end portion, which is an extension of an external surface of the first sheet that is exposed to the outside, and a second surface of the second end portion, which is an extension of an external surface of the second sheet that is exposed to the outside are brought into contact with each other in a state of facing each other, and form a contact surface between the end portions, after the main seam is formed;
• a first rear surface that is opposite in direction to the first surface of the first end portion, and a second rear surface that is opposite in direction to the second surface of the second end portion are positioned at positions, respectively, that are symmetrical with respect to the contact surface of the end portions, and form an exposure surface of the end portion of the seam allowance portion, after the main seam is formed;
• the groove in the auxiliary portion includes both sidewalls and a bottom surface between both the sidewalls;
• the exposure surface of the end portion, when inserted into the groove in the auxiliary portion, is brought into contact with both the sidewalls of the groove;
• and
• the first end portion and the second end portion that form the seam allowance portion extend from the main seam toward the bottom surface of the groove.