Joining jig and joining apparatus

A joining jig configured to join a sheet-shaped adherend on a sheet-shaped material, the joining jig comprising:

• a placement base including a placement surface on which the sheet-shaped material is configured to be placed and to be superimposed on the sheet-shaped adherend, wherein an end edge portion of the placement surface is formed in a shape corresponding to an end edge portion of the sheet-shaped material;
• and
• a plurality of attachment pieces configured to have the sheet-shaped adherend attached, the plurality of attachment pieces disposed side by side along the end edge portion of the placement base, and each attachment piece of the plurality of attachment pieces including a tip portion that pivots and an attachment surface configured to be attached to the sheet-shaped adhered,
• wherein each attachment piece of the plurality of attachment pieces is switchable between a deployment position and a facing position by pivoting the tip portion of each attachment piece adjacent to the end edge portion of the placement surface of the placement base, and
• when the sheet-shaped material is superimposed on the sheet-shaped adhered on the placement surface, the joining jig is configured to fold back the sheet-shaped adherend over the end portion of the sheet-shaped material and adhere the sheet-shaped adherend to the sheet-shaped material by switching from the deployment position to the facing position, and
• in the deployment position the attachment surface of each attachment piece extends away from the end edge portion of the placement surface so that the sheet-shaped adherend is in an unfolded position when adhered to the attachment surface of each attachment piece, and
• in the facing position the attachment surface of each attachment piece faces the placement surface so that, when adhered to the attachment surface of each attachment piece during switching, the sheet-shaped adherend is folded back and adhered over the sheet-shaped material.