PROBLEM TO BE SOLVED: To prevent dropping accident of a workpiece even under a decreased clamping force by increasing a holding force more than a prior art screw type clamp.SOLUTION: This invention relates to a screw type clamp where a workpiece 1 is lifted up under a state in which the workpiece is held between a socket 12 fitted rotatably and in slanting manner to a leg 11 of a clamp main body 10 and a fastening bolt 14 installed at a leg 13 so as to be freely advanceable/retreatable. A hanging hole 21 is arranged in such a way that its center is placed at a position displaced from an opening center line to the leg 13 and a gravity center of the workpiece is always positioned closer to the leg 11 side than the hanging hole center line C . If this invention is formed as a two-hole type in which there is provided a second hanging hole 23 having a center at a position displaced from the opening center line toward the leg 11, the hanging hole capable of attaining the longer inter-distance L2 between the hanging center and the gravity center can be selected for use in response to a thickness of the workpiece, thereby a maximum holding force can be realized.SELECTED DRAWING: Figure 1
ネジ式クランプ
2019-05-15
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 / B25B TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING , Werkzeuge oder Werkbankvorrichtungen zum Befestigen, Verbinden, Lösen oder Halten, soweit nicht anderweitig vorgesehen / B66C Krane , CRANES |