Geometrical instruments – Gauge – Coordinate movable probe or machine
Patent
1986-09-19
1988-03-01
Haroian, Harry N.
Geometrical instruments
Gauge
Coordinate movable probe or machine
33 1M, G01B 503, G01B 703
Patent
active
047276533
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to coordinate measuring instrument including a two-dimensional and a tridimensional measuring instruments for measuring a configuration and the like of a work to be measured by movements of a measuring element relative to a mount plate mounted thereon with the work, and more particularly to a coordinate measuring instrument, in which relative movement guide of a measuring element support member to the mount plate is improved.
BACKGROUND ART
There has heretofore been known a coordinate measuring instrument, wherein a measuring instrument is moved relative to a work to be measured, which is mounted on a mount plate, and a configuration and the like of the work are measured from relative displacement values of this measuring element. The coordinate measuring instruments of the type described are widely used in various fields of industries for displaying the advantages in raising the measuring accuracy, improving the operating efficiency of measurement and the like.
FIG. 1 shows a conventional coordinate measuring instrument. This coordinate measuring instrument is a tridimensional measuring instrument of the type, wherein a mount plate is fixed and the measuring element is movable. A gate-shaped measuring element support member 103 constituting a moving mechanism is mounted on a mount plate 102 rested on a base 100. This measuring element support member 103 comprises: a right and a left supports 104 and 105; a transverse member 106 transversely racked across top portions of these supports 104 and 105 in a direction of X-axis; a slider 107 provided in a manner to be movable along the transverse member 106; and a spindle 108 provided in a manner to be movable in a direction perpendicular to the slider 107, i.e. a direction of Z-axis. A measuring element 109 is secured to the bottom end of this spindle 108.
Movement of the measuring element 109 in a direction of Y-axis is performed due to the movement of the measuring element support member 103 along a guide rail member 110 affixed to the top surface of the mount plate 102, movement of the measuring element 109 in the direction of X-axis is performed due to the movement of the slider 107 along the transverse member 106, and further, movement of the measuring element 109 in the direction of Z-axis is performed due to the movement of the spindle 108 in the vertical direction. The guide rail member 110 is secured thereto with a detector 111 for the direction of Y-axis. A displacement value in the direction of Y-axis of the measuring element 109 due to the movement of the measuring element support member 103 along the guide rail member 110 is detected by this detector 111, a displacement value in the direction of X-axis of the measuring element 109 due to the movement of the slider 107 is detected by a detector 112 secured to the transverse member 106, and further, a displacement value in the direction of Z-axis of the measuring element 109 due to the vertical movement of the spindle 108 is detected by a detector 113 secured to the slider 107. The work to be measured is rested on and affixed to the top surface of the mount plate 102, whereby the measuring element 109 is brought into contact with the surface of the work and moved tridimensionally, so that the configuration and the like of the work can be measured.
In the conventional technique shown in FIG. 1, since the guide rail member 110 as being the reference of guide in the direction of Y-axis is secured to the top surface of the mount plate 102, troublesome assembling and adjusting works for securing the mounting accuracy of the guide rail member 110 are required, and the effective area of the top surface of the mount plate 102 is restricted by the guide rail, member 110, whereby the size of the work to be rested on the mount plate 102 is restricted. There have been such disadvantages that, since the guide rail member 110 becomes an obstacle to the work, when the work is carried onto the mount plate, only after the direction of the work is changed, the work can be mou
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Fujitani Matusiro
Takaku Hideo
Yoda Yukiji
Haroian Harry N.
Mitutoyo Mfg. Co. Ltd.
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