CLAMP DEVICE

To provide a clamp device which can position workpiece with high precision without damaging the workpiece.SOLUTION: A clamp device includes: a pair of clamp members 10 which is arranged in a position sandwiching a rib (a clamped part) 102 of workpiece 100 and has an abutment surface 13 abutting on the rib 102; a support part 20 which operates each of the pair of clamp members 10 to support so as to advance and retract along a predetermined advancing/retracting direction with respect to the rib 102, and press and sandwich the rib 102 in advancing; a guide part 50 which can move each of the pair of clamp members 10 in a positioning direction along a protrusion direction of the rib 102 by reaction force generated when the pair of clamp members 10 presses the rib 102; and a coil spring (a biasing member) 30 which elastically biases the pair of clamp members 10 in a direction opposite to the positioning direction.SELECTED DRAWING: Figure 4 【課題】ワークを傷付けることなく高精度で位置決めすることができるクランプ装置を提供する。【解決手段】ワーク１００のリブ（被クランプ部）１０２を挟む位置に配置され、リブ１０２に当接する当接面１３を有する一対のクランプ部材１０と、一対のクランプ部材１０のそれぞれを、リブ１０２に対して所定の進退方向に沿って進退可能に支持し、かつ、進出時にリブ１０２を押圧して挟持するように作動させる支持部２０と、一対のクランプ部材１０がリブ１０２を押圧するときに生じる反力により、一対のクランプ部材１０のそれぞれをリブ１０２の突出方向に沿った位置決め方向に移動可能とするガイド部５０と、一対のクランプ部材１０を、位置決め方向と反対方向に弾性的に付勢するコイルばね（付勢部材）３０と、を備える。【選択図】図４