Stretchable sheet manufacturing device, stretchable sheet manufacturing method, and wearable article

A stretchable sheet manufacturing method, comprising:

• a forming step in which a first sheet that is continuous, a second sheet that is continuous, and an elastic member that is continuous and is disposed between the first sheet and the second sheet are integrated to form a stretchable sheet continuous body;
• and
• a cutting step by which the elastic member of the stretchable sheet continuous body is cut,
• wherein the forming step includes
• a conveying step in which the first sheet, the second sheet, and the elastic member are conveyed in a conveyance direction in a state in which the elastic member has been disposed between the first sheet and the second sheet;
• a first forming step in which the elastic member, the first sheet, and the second sheet conveyed in the conveyance direction are sandwiched between a first joining member that supports the first sheet, the elastic member, and the second sheet, and a second joining member to join the elastic member and at least one of the first sheet and the second sheet together so that a fixed part is formed in the stretchable sheet continuous body, and
• a second forming step in which the elastic member, the first sheet, and the second sheet are sandwiched between the first joining member and the second joining member to join the first sheet and the second sheet together so that a restricting part is formed in a position adjacent to the fixed part on the stretchable sheet continuous body,
• in the cutting step, the elastic member of the stretchable sheet continuous body is cut in the restricting part of the stretchable sheet continuous body, and
• in the restricting part, the first sheet and the second sheet are not joined to the elastic member, and contraction movement of the elastic member, which has been cut in the cutting step, is restricted by the first sheet and the second sheet.

A stretchable sheet manufacturing method comprising a forming step in which a first sheet that is continuous, a second sheet that is continuous, and an elastic member that is continuous and is disposed between the first sheet and the second sheet are integrated to form a stretchable sheet continuous body, wherein the forming step includes:

• a conveying step in which the first sheet, the second sheet, and the elastic member are conveyed in a conveyance direction in a state in which the elastic member has been disposed between the first sheet and the second sheet;
• a first forming step in which the elastic member, the first sheet, and the second sheet conveyed in the conveyance direction are sandwiched between a first joining member, which supports the first sheet, the elastic member, and the second sheet, and an upstream second joining member to form a temporary joined portion in which the elastic member and at least one of the first sheet and the second sheet are temporarily joined together;
• and
• a second forming step in which the temporary joined portion is sandwiched between the first joining member and a downstream second joining member disposed downstream of the upstream second joining member in the conveyance direction to permanently join the elastic member and at least one of the first sheet and the second sheet together and form the stretchable sheet continuous body.