HEAD SCREW AND MANUFACTURING METHOD THEREOF

• Main Authors: YAMAZAKI HIROFUMI, NISHIGAKI YASUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 21.12.2023
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BLASTING; DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

To provide a head screw which is improved in rigidity while suppressing an increase of a mass.SOLUTION: In a head screw, a male screw thread is formed at a shaft part which extends from a head part. The head screw comprises a resin molded part and a reinforcing shaft. The resin molded part is composed of a synthetic resin material, and integrally constitutes the head part and the shaft part. The reinforcing shaft is embedded into the resin molded part over the shaft part from the head part, and formed into a rod shape having an axial core on an axial core of the shaft part. The reinforcing shaft has an external peripheral face having irregularities, and shaft holes opened at the head part along the axial core of the shaft part, and at least at one end of the shaft part.SELECTED DRAWING: Figure 1 【課題】質量の増加を抑制しながら強度を向上させた頭付きネジを提供する。【解決手段】頭付きネジは、頭部から延びた軸部に雄ネジ山が形成された頭付きネジである。この頭付きネジは、樹脂成形部と、補強軸とを備える。樹脂成形部は、合成樹脂材料から成り、頭部および軸部を一体的に構成する。補強軸は、頭部から軸部に亘って樹脂成形部に埋設され、軸部の軸心上に軸心を有する棒状を成す。補強軸は、凹凸が形成された外周面と、軸部の軸心に沿って頭部および軸部の少なくとも一方の端に開放された軸孔とを有する。【選択図】図１