Tool pot

A tool pot comprising;

• a resin-made pot body;
• and
• a metallic reinforcing member embedded in the pot body by insert molding,
• wherein
• the pot body includes a through hole in a vertical axial direction, and a portion of one end side of the through hole constitutes an insertion hole portion in which a shank of the tool is inserted, and a portion of the other end side of the through hole constitutes a retaining hole portion that retains a distal end portion of the shank, and
• the reinforcing member consists of a pair of reinforcing plates embedded in the pot body so as to face each other in the fore-and-aft direction with the retaining hole portion interposed therebetween, and an entire surface of each of the reinforcing plates is covered by the pot body, and
• at least on portion to reduce generation of thermal stress is formed in each of the reinforcing plates, the portion is formed of a thickness cut-off hole, and a portion around the thickness cut-off hole is resiliently deformable without hindering thermal contraction of the pot body at the time of cooling after the insert molding, a horizontal pin is inserted in the pot body so as to penetrate through the pair of reinforcing plates and avoid the retaining hole portion, the reinforcing member further comprises a reinforcing ring embedded in the pot body so that an inner peripheral surface of the reinforcing ring is exposed to the retaining hole portion, the reinforcing ring is joined at part of opposing surfaces of the pair of the reinforcing plates, a plurality of holes each for housing a ball that retain a distal end portion of the shank are formed therethrough at the reinforcing ring and a portion of each of the reinforcing plates joined to the reinforcing ring at regular intervals in the circumferential direction of the reinforcing ring, the portion to reduce generation of thermal stress is formed on the each of the reinforcing plates so as to avoid a portion that the horizontal pin penetrates through and the portion joined to the reinforcing ring, the thickness cut-off hole constituting the portion to reduce generation of thermal stress is provided in proximity to a required corner portion of each reinforcing plate, and the thickness cut-off hole has the shape of a square including two intersecting edges respectively extending in parallel to corresponding two intersecting edges of the reinforcing plate, and the two intersecting edges of the reinforcing plate constitute the comer portion.