MAIN AND SUB PAWLS FOR CHUCK

• Main Authors: KAWAI YUTAKA, KAWAI KOTA
• Format: Patent
• Language: English; Japanese
• Published: 18.10.2018
• Subjects: BORING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; TRANSPORTING; TURNING

PROBLEM TO BE SOLVED: To provide main and sub pawls for a chuck, enhanced in the fixing strength and easy to remove.SOLUTION: Main and sub pawls for a chuck comprise a sub pawl holding a workpiece, and a main pawl having an almost rectangular parallelepiped outer shape, fixing the sub pawl and fixed to a chuck body. The sub pawl has an almost hexagonal columnar insertion part inserted into the main pawl, and a holding part having a diameter larger than that of the insertion part and holding the workpiece, and the main pawl has two or more almost hexagonal columnar holes into which the insertion part of the sub pawl is inserted, a slit provided so as to connect the adjacent holes, and a bolthole vertically penetrating into the slit. A pair of opposing surfaces of the two or more almost hexagonal columnar holes, the slit, and a surface along the longitudinal direction of the main pawl are each in parallel, the slit is provided so as to connect the adjacent holes in a minimal distance, and the bolthole is attached with a split fastening bolt tightening the slit.SELECTED DRAWING: Figure 1 【課題】固定が強固でしかも取り外しの容易なチャック用親子爪を提供する。【解決手段】ワークを把持する子爪と、前記子爪を固定するとともにチャック本体に固定される、外形が略直方体状の親爪と、を備えるチャック用親子爪において、前記子爪は、前記親爪に挿入される略六角柱状の挿入部と、前記挿入部よりも径の大きい、ワークを把持する把持部と、を有し、前記親爪は、前記子爪の挿入部が挿入される略六角柱状の２以上の穴と、隣接する前記穴を繋ぐように設けられたスリットと、前記スリットを垂直に貫くボルト穴と、を有し、前記略六角柱状の２以上穴のうちの対向する一組の面と、前記スリットと、前記親爪の長手方向に沿った面とが、それぞれ平行であり、前記スリットは、隣接する前記穴を最短距離で繋ぐように設けられ、前記ボルト穴には、前記スリットを締め付ける割締めボルトが取り付けられていることを特徴とする。【選択図】 図１