To provide a strength varying fastener capable of reusing a fastening member by suppressing breakage of the fastening member itself even when operated so as to decrease fastening strength.SOLUTION: A strength varying fastener includes a fastening shaft part (a screw rod part) 20 provided with a fitting part (a male screw) 21 and a head 12 projecting the screw rod part, holds fastening members 1A, 1B laid over each other through the screw rod part between the head and the fitting tool (a nut) 70 fitted to the screw rod part, fastens them, controls them by a controller 10, and decreases fastening strength so as to be able to release fastening of the fastening members. The screw rod part is provided with: an outer peripheral side part 23 provided with a male screw; and a core material part 29 which is disposed in an outer peripheral side part so as to maintain strength of the outer peripheral side part and is movably disposed up to a release area RA releasing the arrangement area PA when the fastening members are fastened in the outer peripheral side part. In the head, moving means 38 whose operation is controlled by a controller and which moves the core material part to a release area is disposed.SELECTED DRAWING: Figure 1
【課題】締結強度を低下させるように作動されても、締結部材自体の破損を抑制して、締結部材の再利用が可能となる強度可変締結具を提供すること。【解決手段】取付部(雄ねじ)21を設けた締結軸部(ねじ棒部)20と、ねじ棒部を突設させた頭部12と、を備えて、ねじ棒部を貫通させて重ねた締結部材1A,1B相互を、頭部とねじ棒部に取り付けた取付具(ナット)70との間で保持して、締結し、制御装置10に制御されて、締結部材の締結を解除可能に、締結強度を低下させる。ねじ棒部は、雄ねじを設けた外周側部23と、外周側部の強度を維持するように、外周側部内に配設されるとともに、外周側部における締結部材の締結時の配置エリアPAから離脱する離脱エリアRAまで、移動可能に配設される芯材部29と、を備える。頭部内には、制御装置に作動を制御されて、芯材部を離脱エリアまで移動させる移動手段38が配設されている。【選択図】図1
STRENGTH VARYING BOLT
強度可変ボルト
2021-03-01
Patent
Electronic Resource
Japanese
IPC: | F16B DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES , Vorrichtungen zum Befestigen oder Sichern von Konstruktionselementen oder Maschinenteilen, z.B. Nägel, Bolzen, Schrauben, Sprengringe, Klemmen, Klammern oder Keile / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / B62D MOTOR VEHICLES , Motorfahrzeuge |
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