Toshiba Kikai Kabushiki Kaisha

Seiji Nakajima

Takeshi Momochi

Masahito Shiozaki

Mituharu Sato

In a machine tool provided with a column 4 mounted on a back end portion of a bed 1 having a table 2, and a spindle head 20 arranged in a vertically movable manner to the column 4, both sides of an upper portion of the column 4 is connected with both sides of a front-end portion of the bed 1 through support members 42, 43. Even the machine has a structure that the spindle head 20 embeds a main shaft rotating at high rpm, vibration can be reduced. The column is affected by a force to fall down in the direction due to the weight of the spindle head 20, but the tilt caused by the force can be avoided. Accordingly, a high finish surface accuracy can be ensured without an increase in size and weight.

Machine tool

Machine tool operation console

There are provided a pair of concentric inner and outer annular magazines each provided with a plurality of tool pots and a blind pot which are arranged along a circle, and magazine driving device for independently rotating the outer and inner magazines to bring a tool pot containing a designated or the blind pot to predetermined tool pot indexing positions, and a tool holding pot disposed on the outside of the outer annular magazine for temporarily holding a tool taken out from one of the tool pots of the inner or outer magazine or a tool returned from a machine tool. The center of the holding pot lies on a line interconnecting the center of the inner and outer magazines and the tool pot indexing positions thereof. A saddle including a tool transfer arm with a tool gripper is moved along the line for inserting and taking out a tool into and out of a designated tool pot, and a tool exchanging mechanism is used to exchange a tool between the tool holding pot and the machine tool.

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Numazu, Japan

Seiji Nakajima