Inner diameter measuring device

• US 9,429,409 B2
• Filed: 02/07/2013
• Issued: 08/30/2016
• Est. Priority Date: 02/09/2012
• Status: Active Grant

• Current Assignee: IHI Corporation
• Original Assignee: IHI Corporation
• Inventors: Baba, Michiko, Hasegawa, Kouzou, Taga, Norimasa
• Primary Examiner(s): GUADALUPE, YARITZA
• Application Number:
  US14/377,226
• Publication Number:
  US 20150020395A1
• Time in Patent Office: 1,300 Days
• Field of Search: 335/42
• US Class Current: 1/1
• CPC Class Codes: G01B 11/12 internal diameters
• CPC Class Codes: G01B 21/14 internal diameters of boreholes or wells E21B47/08
• CPC Class Codes: G01B 3/50 of limit-gauge type, i.e. "go/no-go" G01B3/48 takes precedence
• CPC Class Codes: G01B 5/12 internal diameters

Abstract

An inner diameter measuring device (4) for measuring an inner diameter by inserting an inner diameter measuring unit into an inside of a hollow member to be measured, comprises a supporting shaft (18) having the inner diameter measuring unit supported at a forward end, and a supporting mechanism unit (30) for cantilever-supporting the supporting shaft, wherein the supporting mechanism unit has a frame (31), a spherical bearing (33) and a deflection adjusting unit (35), wherein the shaft is supported by the frame via the spherical bearing, an end portion (32) of the supporting shaft is passed through the spherical bearing and is extended, and a position of an end of the end portion in vertical direction is adjusted by the deflection adjusting unit.

Claims

1. An inner diameter measuring device for measuring an inner diameter by inserting an inner diameter measuring unit into an inside of a hollow member to be measured, comprising a supporting shaft having said inner diameter measuring unit supported at a forward end, and a supporting mechanism unit for cantilever-supporting said supporting shaft, wherein said supporting mechanism unit has a frame, a spherical bearing and a deflection adjusting unit, wherein said shaft is supported by said frame via said spherical bearing, an end portion of said supporting shaft is passed through said spherical bearing and is extended, a rotating angle of an end of said end portion in vertical direction is adjusted by said deflection adjusting unit, and a position of said inner diameter measuring unit in vertical direction is adjusted.

2. An inner diameter measuring device according to claim 1, wherein said frame has a front surface base plate positioned at a forward end side of said supporting shaft and a rear surface base plate installed at a position separated by a predetermined distance with respect to said front surface base plate, wherein said spherical bearing is mounted on said front surface base plate, said deflection adjusting unit is mounted on said rear surface base plate via a horizontal adjusting unit, and said horizontal adjusting unit can adjust a position of said deflection adjusting unit in horizontal direction.

3. An inner diameter measuring device according to claim 2, wherein said horizontal adjusting unit has a horizontal position adjusting plate being displaceable in horizontal direction with respect to said rear surface base plate and being fixable, and a vertical guide block and a nut block are mounted on said horizontal position adjusting plate.

4. An inner diameter measuring device according to claim 2, wherein said deflection adjusting unit has a vertical guide block extended in vertical direction and a nut block provided above an end portion of said supporting shaft, wherein an end of said end portion is sandwiched by said vertical guide block and is displaceable only in vertical direction along said vertical guide block, a lower end of a deflection adjusting screw screwed through said nut block comes into contact with an upper end of said end, a position in vertical direction of said end is adjusted by said deflection adjusting screw and inserted into said vertical guide block, an end fixing screw movable in up-to-down direction is screwed into said end, and said end is fixed on said vertical guide block by said end fixing screw.

5. An inner diameter measuring device according to claim 1, wherein said deflection adjusting unit has a vertical guide block extended in vertical direction and a nut block provided above an end portion of said supporting shaft, wherein an end of said end portion is sandwiched by said vertical guide block and is displaceable only in vertical direction along said vertical guide block, a lower end of a deflection adjusting screw screwed through said nut block comes into contact with an upper end of said end, a position in vertical direction of said end is adjusted by said deflection adjusting screw and inserted into said vertical guide block, an end fixing screw movable in up-to-down direction is screwed into said end, and said end is fixed on said vertical guide block by said end fixing screw.