1 clarified that a moving member is consisted of a trolley moving between a retracted position set inside a storage housing and a measuring position on a measurement table, and the trolley is provided with a lift mechanism having an elevator frame which is driven to be raised or lowered so as to lift up and hold the testing master block:
- The present invention is concerned with a calibrating apparatus for examining the accuracy of a measurement probe of a measuring machine. However, all of the references 1-3 (Japanese Utility Model Publication S60-32564, Laid-open publication JPH04-220513 and Laid-open publication JPH08-187528) are concerned with the measuring device with a gage block (masterpiece) giving a reference plane or origin for the measurement. That is, the purposes of invention of the references 1-3 are different from the one of the present invention in the point of that all inventions of the references are not a measuring device with the function of calibrating the accuracy of the measurement probe.
- According to reference I (Japanese Utility Model Publication S60-32564), the gage block is equipped movably between a measuring position and a retracted position by a cam mechanism, but it is different from the present invention in the point that it does not provide a storage housing at the retracted position and the trolley is moved by a pantograph and side rail.
- Though reference 2 (Laid-open publication JPH04-220513) is concerned with a positioning device of the plate and it provides an up-down lift mechanism of a pantograph style, it is for setting the plate as a measured object in the measurement position. Moreover, for the purpose of invention, it is different from the lift mechanism of the present invention in which the measurement master is put on or put off the trolley, which moves the measurement master.
- Though reference 3 (Laid-open publication JPH08-187528) provides the lift mechanism which moves the masterpiece between the measurement position and the retracted position, it is different from the present invention in the point that it does not provide the storage housing at the retracted position and the trolley which is moved by a pantograph and side rail.
- In reference 4 (Laid-open publication JPH2000-136921) and reference 5 (Laid-open publication JPH2000-136924), though the mechanism in which the masterpiece carried on the trolley is moved between a calibration position and the retracted position, it is different from the mechanism of the present invention in the point that the movement of the trolley of the reference invention is carried on a rail, it does not provide the storage housing at the retracted position and it does not provide an up-down frame provided with the lift mechanism which is independent from the trolley.
- The main effects of the present invention are summarized as follows:
- (1) According to the present invention, by using a trolley moving by a pantograph and a side rail, it is possible to guide the trolley straightly and exactly without using the rail on the measurement table. Consequently, it is able to raise the accuracy of the setting of the measurement master, to effectively use an area of the measurement table and to make the measuring operation easy.
- (2) By providing a storage housing at the retracted position of the measurement master, it is possible to prevent damage of the expensive testing master block.
- (3) By providing an up-down frame having the lift mechanism being independent from the trolley, it is possible to set the up-down frame on the measurement table and to make setting the measurement master and measuring object on the measurement table easy.