JPH0274135U - - Google Patents

Description

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view of a table of a machine tool, Fig. 2 is a perspective view of a clamping device, Fig. 3 is a longitudinal sectional view of the device, and Fig. 4 is a plan view of a table of a machine tool.
The figure is a longitudinal cross-sectional view showing the clamped state of the device.
The figure is a diagram corresponding to Figure 3 of a modification of the same device, Figure 6 is a plan view of the piston rod in Figure 5, Figure 7 is a sectional view taken along the line of Figure 5, and Figure 8 is a machine tool according to another embodiment. 9 is a perspective view of a clamping device of another embodiment, FIG. 10 is a view corresponding to FIG. 3 of the same device, FIG. 11 is a view equivalent to FIG. 4 showing the clamping state of the same device, FIG. 12 is a perspective view of a modification of the device. C, CA, CB... Clamp device, 3, 32...
...Body member, 4,33,60...Hydraulic cylinder,
15, 39, 62... Piston rod, 5, 34
, 70...clamp member, 5c...engaging groove, 15
a... Fitting recess, 20... Accommodating groove, 21... Accommodating hole, 22... Steel ball, 34c... Engaging portion, 40...
Engaging member, 62a...fitting hole, 62b...engaging female threaded portion, 70c...engaging male threaded portion.

Claims (1)

[Claims for Utility Model Registration] (1) A clamping device for fixing objects such as workpieces to be processed by machine tools on a base such as a table, and a main body member fixed to the base in the form of an elongated block. A plurality of hydraulic cylinders are provided in the main body member with the piston rods facing outside the board surface and perpendicular to the board surface, and clamp members are provided coaxially on the piston rod side of each hydraulic cylinder. A head part for pressing the target article toward the board side is formed at the end opposite to the board side, a fitting recess into which the leg part of the clamp member is removably fitted is formed at the end of each piston rod, and the leg part of the clamp member an annular engagement groove is formed on the outer circumferential surface of the piston rod; a plurality of accommodation holes are formed in a portion of the circumferential wall of the fitting recess of the piston rod that faces the engagement groove; An annular accommodation groove is formed in a portion facing the accommodation hole when the piston rod moves to the clamp release position on the advancing side, and when the piston rod is in a position other than the clamp release position, it fits into the accommodation hole and the engagement groove. The piston rod and the clamp member are connected through the steel ball, and when the piston rod is in the clamp release position, the steel ball is accommodated in the accommodation hole and the accommodation groove, so that the connection between the piston rod and the clamp member can be released. A clamp device with a removable clamp member characterized in that: (2) A clamping device for fixing objects such as workpieces to be processed by a machine tool on a base such as a table, which includes a main body member in the shape of an elongated block that is fixed to the base, and the main body member has a board surface and A plurality of hydraulic cylinders are provided orthogonally with their piston rods facing outside the panel surface, and a clamp member is provided coaxially on the piston rod side of each hydraulic cylinder. A head part is formed to press the article toward the board surface, a fitting hole is formed at the end of each piston rod into which the leg part of the clamp member is removably attached, and a fitting hole is formed at the end of each piston rod to which the leg part of the clamp member is detachably attached. An engaging male threaded portion is formed on the peripheral surface portion, and an engaging female threaded portion into which the engaging male threaded portion is screwed is formed on the inner peripheral surface portion on both sides of the fitting hole of each piston rod that are spaced apart from each other. By inserting the legs of the clamp member into the fitting hole with the phase of the male engagement thread part shifted by about 90 degrees with respect to the female engagement thread part, and then rotating the clamp member about 90 degrees around the axis. 1. A removable clamping device for a clamp member, characterized in that the clamp member is configured to be removably connected to a piston rod by screwing an engaging male threaded portion into an engaging female threaded portion. (3) A clamping device for fixing objects such as workpieces to be processed by a machine tool onto a base such as a table, which includes a main body member that is fixed to the base in the shape of an elongated block, and has a board surface and a base member fixed to the base. A plurality of hydraulic cylinders are provided orthogonally with their piston rods facing outside the panel surface, and a clamp member is provided coaxially on the piston rod side of each hydraulic cylinder. An engagement having a head part that presses the article toward the board surface, an engaging part formed at the other end, and an engaging groove in which the engaging part engages detachably from the side at the end of each piston rod. 1. A removable clamping device for a clamp member, characterized in that an axial clamping force can be transmitted from a piston rod to a clamp member in a state where the member is fixed and the engaging portion is engaged with the engaging groove.