JPH0267207U

JPH0267207U -

Info

Publication number: JPH0267207U
Application number: JP14542088U
Authority: JP
Priority date: 1988-11-09
Filing date: 1988-11-09
Publication date: 1990-05-22
Anticipated expiration: 2003-05-18
Also published as: JPH0518645Y2

Description

[Brief explanation of the drawing]

第１図および第２図は、本考案に係るひずみゲ
ージ取付治具をボルトに適用した実施例の全体構
成を示し、このうち、第１図は一部を縦断面をも
つて示す正面図、第２図は、第１図のＩ―Ｉ矢視
断面図、第３図および第４図は、従来例の構成を
示す図で、このうち、第３図は、一部を縦断面を
もつて示す正面図、第４図は、第３図の―矢
視断面図である。１……ボルト、２……頭部穴、２ａ……底面、
３……ひずみゲージ貼り用穴、ＬＯ……深さ、３
ａ……ひずみゲージ貼り用穴の底面、３ｂ……開
口部、４……パイプ、４ａ……連通孔、５……栓
、６……チユーブ、６ａ……封止部、６ｂ……被
緊締部、Ｌ１……間隙、７……緊締部材、８……
ストツパ、９……ひずみゲージ、９ａ……ゲージ
リード、１０……ホース。 1 and 2 show the overall configuration of an embodiment in which a strain gauge mounting jig according to the present invention is applied to a bolt, of which FIG. 1 is a front view partially shown in longitudinal section; Fig. 2 is a sectional view taken along the line II in Fig. 1, and Figs. 3 and 4 are views showing the configuration of a conventional example. The front view shown in FIG. 4 is a sectional view taken along the - arrow in FIG. 3. 1... Bolt, 2... Head hole, 2a... Bottom,
3...Hole for strain gauge pasting, LO...depth, 3
a...Bottom surface of the hole for attaching the strain gauge, 3b...Opening, 4...Pipe, 4a...Communication hole, 5...Plug, 6...Tube, 6a...Sealing part, 6b...Tightened part Part, L1... Gap, 7... Tightening member, 8...
Stopper, 9...Strain gauge, 9a...Gauge lead, 10...Hose.

Claims

[Scope of utility model registration request]

When installing a strain gauge on the inner peripheral wall between the open end and the bottom of an extremely small-diameter mounting hole drilled from one end surface of the object to be measured to a predetermined depth, a tube is inserted into the mounting hole, and the tube is inserted into the mounting hole. A strain gauge mounting jig that mounts a strain gauge by force-feeding pressurized fluid inside and using its expansion force has an outer diameter that can be inserted into the mounting hole longer than the depth of the small-diameter mounting hole. The tube is hollow with openings at both ends, and has an outer diameter longer than the depth so as to be inserted into the tube, has appropriate rigidity, and has a through hole penetrating from the outer circumferential surface to the inner circumferential surface. The device includes a hollow pipe with one end closed, a sealing locking portion provided in the circumferential direction at a position slightly longer than the depth from one end of the pipe, and a tightening member tightening the sealing locking portion. , inserting the pipe into the tube, sealing one end of the tube by tightly fixing the tube to the outer periphery of the closed end of the pipe, and inserting the tightening member into the outer periphery of the tube to seal the tube. The other end of the tube is sealed by tightening with the locking portion, and in use, one end of the pipe is inserted together with the tube up to the bottom of the mounting hole, and the A strain gauge mounting jig, characterized in that it is configured to force-feed pressurized fluid to expand the tube through the through hole.