Winding core holding tool, winding core unit and film type adhesive set

摘要

The utility model provides a core retaining tool, a winding core unit and a film adhesive assembly. The core retaining tool allows a winding core to be mounted on a rotating shaft and allows force to be reliably transmitted between a core material and the rotating shaft, so that film adhesive can be stably and continuously drawn out. The core retaining tool (1) comprises a peripheral portion (10), a rotating shaft passage portion (9), a connection portion (11) and an accommodating portion (13); the peripheral portion (10) can be inserted into the winding core to retain the same; the rotating shaft passage portion (9) which is provided with an opening (8) allowing passage of the rotating shaft is connected with the rotating shaft in an embedded joint manner; the connection portion (11) extends from the rotating shaft passage portion (9) to the radial outside and is connected with the peripheral portion (10); the accommodating portion (13) arranged at the periphery of the opening (8) accommodates a protrusion which protrudes from the outer peripheral surface of the rotating shaft.