Mitutoyo Corporation

Yuichi Ichikawa

Osamu Saito

Shuuji Hayashida

Takahiro Nakamura

Yuji Fujikawa

Yuuzou Hashimoto

Nobuyuki Hayashi

Mikio Suzuki

Kouji Sasaki

Seigo Takahashi

Masamichi Suzuki

Hiroaki Kawada

Masahiko Tachikake

Hiroatsu Mori

Koji Sasaki

Tetsuya Nakadoi

Yoshitaka Kuji

Norihide Tsuyuki

Hiroyuki Ohta

Tsuyoshi Kuroiwa

Tomio Omori

Masafumi Okamoto

There is provided a measuring device (dial gauge) capable of performing measurement with a desired measuring force regardless of the posture of the measuring device. A dial gauge in an exemplary embodiment of the present invention includes a measuring force adjustment unit provided to a body case and capable of moving and being positioned and fixed in a direction substantially parallel to a moving direction of a spindle. A biasing means has one end directly or indirectly engaged with the spindle and the other end directly or indirectly engaged with the measuring force adjustment unit, and biases the spindle toward a tip end. The measuring force adjustment unit includes an external thread portion and a connection supporting member having one end screwed with the external thread portion and the other end coupled to the biasing means. The connection supporting member is screw-fed by rotationally operating the external thread portion in such a manner that a position of the connection supporting member is changed and fixed.

Multi-position tolerant contact gauge

A photoelectric encoder includes a scale in which diffraction gratings are formed at predetermined pitches in a measurement axis direction, a detection head which is relatively movable with respect to the scale, and which includes an illuminating portion configured to illuminate the scale, and a light receiving portion configured to receive light reflected by or transmitted through the diffraction gratings of the scale, a signal processing device configured to process a light reception signal output from the light receiving portion of the detection head, and a signal transmitting unit configured to transmit a signal between the detection head and the signal processing device. The signal processing device includes a display unit configured to display information indicating an attachment posture of the detection head with respect to the scale.

Photoelectric encoder and photoelectric encoder system

A measuring instrument that includes a tubehaving a female threadand a spindlehaving a lead screwscrewing with the female threadand capable of being advanced and retracted in an axial direction along with rotation around the axial center, and measures dimensions etc. of a workpiece according to displacement in an axial direction of the spindlebased on a rotation amount of the spindleAccording to this measuring instrument, a pitch P of the lead screwis twice as large or more than the difference between an external diameter R and a core diameter r thereof, and the difference between the external diameter R and the core diameter r is one-fifth or less of the external diameter R. Because of the lead screwwith the large pitch, the spindlecan be moved at high speed, thus enhancing operational performance of the measuring instrument.

Measuring instrument

A stator () is hooked in a frame body () away with a prespecified space from a spindle (), so that it is not necessary to fix the stator with a screw. The stator (), therefore, can easily be mounted, and further as it is not necessary to provide a screw hole in the frame body (), so that the need for waterproofing processing associated with a screw hole is eliminated. Further the stator () is hooked in a protrusion () of an electronic unit () inside the frame body () away with a prespecified space from the spindle (), so that a rotation thereof in the peripheral direction of the spindle due to play and rattle is small and a measurement error can be suppressed.

Digital displacement measuring instrument

Provided is a measuring devicefor measuring the size of an object comprising a body, and a spindlewhich is screwed into the bodyand axially advances and retracts by screwing with respect to the body, the measurement being based on the axial displacement of the spindleeffected by the revolution of the spindle, wherein the spindle is screwed into the bodyvia a multiple-start thread. Therefore, it is possible to displace the spindleat a high speed, which improves the operability of the measuring device.

Measuring device using multi-start threaded spindle

The present invention provides an analog quantity display method of counting displacement of a probe disposed in contact with an object to be measured and analog-displaying the obtained count value by an analog display section as an analog quantity. If a peak value of the count value exceeds a possible analog-display range of the analog display section, an offset provided for the analog-displayed count value is updated in such a manner that the peak value is displayed within the possible analog-display range. Further, an analog quantity measuring method is provided, which comprises counting displacement of the probe, compares the obtained count value with a peak value of the count value, holds the count value as a new peak value depending upon a result of the comparison, and executes the comparison and the holding of the peak value again if the difference between the present peak value and the present count value exceeds a predetermined value. The analog quantity display and measuring methods are applicable to a digital/analog display type measuring instrument comprising a counter for counting the displacement of the probe in contact with the measured object, a digital display section for digitally displaying the count value, and an analog display section located adjacent to the digital display section, for displaying the count value as the bar graph comprising the large number of analog bars arranged in juxtaposition in one direction.

Analog quantity display method, analog quantity measuring method, and digital/analog display type measuring instrument

Growing community of inventors

Kawasaki, Japan

Yuichi Ichikawa