Measuring jig, measuring device, and gap measuring method

Patent metadata

Field	Value
Publication number	US-10962344-B2
Application number	US-201716096472-A
Country	US
Kind code	B2
Filing date	May 9, 2017
Priority date	May 19, 2016
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

Abstract

A measuring jig includes: a base portion; a sensor holding portion disposed so as to protrude from the base portion and configured to hold a sensor; and a first protruding portion protruding from the base portion toward the same side as the sensor holding portion, at a first position different from a sensor position which is a position of a sensor installation surface on which the sensor extends, with respect to a direction orthogonal to the sensor installation surface.

First claim

The invention claimed is:

1. A measuring jig, comprising:
a base portion;
a sensor holding portion disposed so as to protrude from the base portion and configured to hold a sensor; and
a first protruding portion protruding from the base portion toward the same side as the sensor holding portion, at a first position different from a sensor position which is a position of a sensor installation surface on which the sensor extends, with respect to a direction orthogonal to the sensor installation surface.

2. The measuring jig according to claim 1 , further comprising:
a movable piece disposed so as to be capable of being displaced with respect to the base portion; and
at least one biasing unit configured to bias the movable piece toward an opposite side to the first position across the sensor position, in the direction orthogonal to the sensor installation surface.

3. The measuring jig according to claim 2 ,
wherein the at least one biasing unit includes a pair of biasing units which are parallel to a protruding direction of the sensor holding portion from the base portion when projected on the sensor installation surface, and positioned on opposite sides of a line passing through a center position of the sensor.

4. The measuring jig according to claim 2 ,
wherein the at least one biasing unit includes a helical torsion spring disposed around a line which is parallel to the sensor installation surface and which is orthogonal to a protruding direction of the sensor holding portion from the base portion, and
wherein the helical torsion spring includes a first arm having a tip portion as the movable piece.

5. The measuring jig according to claim 4 ,
wherein the helical torsion spring further includes:
a second arm disposed opposite to the first arm; and
a coil portion positioned between the first arm and the second arm, and

wherein the first arm includes:
a root portion extending from the coil portion toward an opposite side to the first position across the sensor position; and
the tip portion bended toward the sensor position with respect to the root portion.

6. The measuring jig according to claim 4 ,
wherein the helical torsion spring includes a second arm disposed opposite to the first arm, and
wherein the base portion includes a reactive-force receiving surface configured to be in contact with the second arm and receive a reactive force of an elastic force of the helical torsion spring.

7. The measuring jig according to claim 6 , further comprising:
a spring-force adjusting portion for moving the reactive-force receiving surface and adjusting a position of the first arm as the movable piece in a natural state of the helical torsion spring.

8. The measuring jig according to claim 4 , further comprising:
a spring position determining portion for determining a position of a center of the helical torsion spring.

9. The measuring jig according to claim 1 , further comprising:
a second protruding portion protruding from the base portion toward the same side as the sensor holding portion, at a second position different from the sensor position and the first position, in the direction orthogonal to the sensor installation surface.

10. The measuring jig according to claim 1 ,
wherein the first protruding portion includes a magnet.

11. The measuring jig according to claim 1 , further comprising:
a protruding-amount adjusting portion for adjusting a protruding amount of the first protruding portion from the base portion.

12. The measuring jig according to claim 1 ,
wherein the first position exists on an opposite side to the sensor position across a gravity center of the measuring jig, in the direction orthogonal to the sensor installation surface.

13. The measuring jig according to claim 1 ,
wherein the sensor holding portion is configured to, while being inserted in a gap between a first member and a second member to be measured by the sensor, make contact with a portion of the first member which faces the second member, and
wherein the first protruding portion is configured to make contact with the first member and adjust an attitude of the sensor holding portion with respect to the portion of the first member.

14. A measuring device, comprising:
the measuring jig according to claim 1 ; and
a sensor held on the sensor holding portion of the measuring jig.

15. The measuring device according to claim 14 ,
wherein the measuring jig includes at least one protruding portion protruding from the base portion toward the same side as the sensor holding portion, at a different position from the sensor position with respect to a direction orthogonal to the sensor installation surface,
wherein the sensor holding portion is configured to, while being inserted in a gap between a first member and a second member to be measured by the sensor, make contact with a portion of the first member which faces the second member, and
wherein the measuring device further comprises a contact detecting portion for detecting contact between the first member and at least one protruding portion of the at least one protruding portion.

16. The measuring device according to claim 15 ,
wherein the contact detecting portion includes an image capturing portion configured to capture an image of a tip portion of the at least one protruding portion and a portion of the first member facing the tip portion of the at least one protruding portion.

17. The measuring device according to claim 15 ,
wherein the contact detecting portion includes a contact sensor configured to detect contact between a tip portion of the at least one protruding portion and a portion of the first member facing the tip portion of the at least one protruding portion.

18. A gap measuring method, comprising:
a step of causing a sensor mounted to a measuring jig to enter a gap between a first member and a second member, and measuring a size of the gap with the sensor,
wherein the measuring jig includes:
a base portion;
a sensor holding portion disposed so as to protrude from the base portion and configured to hold the sensor; and
a first protruding portion protruding from the base portion toward the same side as the sensor holding portion, at a first position different from a sensor position which is a position of a sensor installation surface on which the sensor extends, with respect to a direction orthogonal to the sensor installation surface, and

wherein the step of measuring the size of the gap includes causing the sensor holding portion to make contact with a portion of the first member which faces the second member, and performing measurement by the sensor in a state where the first protruding portion is in contact with the first member.

Assignees

• Mitsubishi Hitachi Power Sys
• Mitsubishi Power Ltd

Inventors

• Nishioka Yasunori
• Kameda Takuro
• Kataoka Masahito
• Morimoto Hitoshi
• Konishi Tetsu

Classifications

• G01B21/16

  for measuring distance of clearance between spaced objects · CPC title

• G01B21/00

  Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant · CPC title

• G01B21/02 Primary

  for measuring length, width, or thickness (G01B21/10 takes precedence) · CPC title

• G01B5/14 Primary

  for measuring distance or clearance between spaced objects or spaced apertures (G01B5/24 takes precedence) · CPC title

• G01D11/16

  Elements for restraining, or preventing the movement of, parts, e.g. for zeroising (caging of moving parts when not in use G01D11/20) · CPC title