JPS61117612U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of a machine tool in which the present invention has been implemented, Fig. 2 is a plan view showing the rack and pinion parts, Fig. 3 is a front view showing how the pinion is attached to the hydraulic cylinder, and Fig. 4 is FIG. 5 is a front view of the hydraulic cylinder attached to the swing arm, FIG. 6 is a plan view for explaining the operating state, and FIG.
The figure is a perspective view of main parts of another embodiment, and FIG. 8 is a perspective view of a conventional machine tool. In the drawing, 1 is a column, 2 is a saddle, 3 is a headstock, 4 is a headstock suspension chain, and 5
is the saddle suspension chain, 6 is the counterweight,
8 is a swing arm, 16 is a balance weight for overturning moment, 21 is a hydraulic cylinder, 21a is an in/out rod, 30 and 31 are racks, 32 is a pinion,
34 is a hydraulic cylinder, and 34a is an in/out rod.

Amendment April 19, 1980 The scope of claims for utility model registration is amended as follows.

[Claims for Utility Model Registration] A head stock that can freely pivot horizontally with respect to the column; A saddle that is suspended in balance with a counterweight by a swinging arm for suspending the head stock that can freely pivot horizontally with respect to the column, and that can freely move up and down along the column; a headstock movably supported by the headstock;
Alternatively, a movable rack fixed to the chain connection position adjustment mechanism on the headstock in its horizontal movement direction, a fixed rack fixed to the saddle facing the rack, and a fixed rack fixed to the saddle so as to be interlocked with both racks. a hydraulic cylinder for detecting headstock movement with the pinion supported on an in/out rod; and a hydraulic cylinder interposed between the headstock lifting arm and the column and installed to drive the arm horizontally. A headstock balance device for a machine tool, which is equipped with a hydraulic cylinder for driving arm rotation in conjunction with the operation, and is configured to rotate a headstock suspension arm in accordance with the horizontal movement of the headstock. The brief description of the drawing has been amended as follows. Between lines 9 and 10 on page 12 of the specification, “
17 is a chain connection position adjustment mechanism.

Claims (1)

[Scope of utility model registration request] A headstock that is horizontally movable with respect to a column; A headstock that is suspended in balance with a counterweight by a swinging arm for suspension, and that is supported so as to be movable in a horizontal direction with respect to a saddle that is movable up and down along the column. a movable rack fixed to the headstock in its horizontal movement direction; a fixed rack fixed to the saddle opposite to the rack; a pinion disposed between the two racks and meshed with both the racks; A hydraulic cylinder for detecting headstock movement with a pinion supported on an in/out rod; and a hydraulic cylinder interposed between the headstock lifting arm and the column, which is attached to drive the arm in horizontal rotation, and is moved by the operation of the hydraulic cylinder. A headstock balance device for a machine tool, which is equipped with a hydraulic cylinder for driving arm rotation, and is configured to rotate a headstock suspension arm according to the horizontal movement of the headstock and move the suspension position thereof.