SCREW WITH FALLING-OFF PREVENTION FUNCTION

• Main Author: MIYAKE YOSHIO
• Format: Patent
• Language: English; Japanese
• Published: 28.12.2017
• Subjects: 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; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a screw that does not drop off from a screw driver whatever material quality may be used in the screw and additionally the screw can be easily fastened with one hand even if the working location is narrow to eliminate inconvenience that the screw of non-magnetic raw material cannot be held by a screw driver and the fastening work should be performed while holding the screw with one hand and additionally the screw is hardly held at the narrow part by a screw driver including tweezers.SOLUTION: A screw having an elliptical or polygonal hole at its head part to which a screw fastening tool is enabled to be held by a screw fastening tool and to perform a fastening work easily only with one hand without being dropped by making the hole having a tapered surface deeper as it becomes deeper continuously to a deep side of a vertical surface that is formed in the same size from the end surface of the fitting hole toward its depth direction and the screw fastening tool is held by the tapered surface.SELECTED DRAWING: Figure 1 【課題】非磁性素材のネジは、磁石付きネジ回しでは保持できないため、片方の手でネジを保持しながら作業をする必要がある。また、ピンセット付きドライバーでは狭間部ではネジを挟持しにくいという問題がある。そこでどのような材質のネジでもドライバーから落ちることがなく、狭間部でも容易に片手で締めることができるネジを提供する。【解決手段】頭部に楕円形又は多角形のネジ締め工具が嵌まる穴を有するネジにおいて、嵌合穴の端面から深さ方向に同寸法で形成されている垂直面に加え、垂直面の奥側に連続して深くなるに従って窄まるテーパー面を有する穴にすることで、テーパー面がネジ締め工具を挟み込むことによって、ネジ締め工具がネジを挟持し、ネジを落とすことなく、かつ片方の手だけでも締めつけ作業を容易に行うことを可能にする。【選択図】図１