JPH02133603U

JPH02133603U -

Info

Publication number: JPH02133603U
Application number: JP4225789U
Authority: JP
Priority date: 1989-04-10
Filing date: 1989-04-10
Publication date: 1990-11-06
Anticipated expiration: 2004-04-10
Also published as: JPH0750643Y2

Description

[Brief explanation of drawings]

第１図は周長測定装置の斜視図、第２図は周長
測定装置の分解斜視図、第３図は周長測定装置の
平面図、第４図は周長測定装置の側面図、第５図
および第６図は棒状部材の周長測定表示の説明図
である。そして第７図は従来例の周長測定装置の
概略平面図である。８……スプリング、９……測定軸、１０……周
長測定表示装置、１１……可撓性部材、１３……
往復移動部材、１４……緩速移動機構、１５……
ダンパーシリンダ、１６……シリンダロツド、１
８……スプリング、２２……ロツド戻し機構、２
６……操作具、２７……棒状部材、Ｒ……ループ
。 Fig. 1 is a perspective view of the circumference measuring device, Fig. 2 is an exploded perspective view of the circumference measuring device, Fig. 3 is a plan view of the circumference measuring device, Fig. 4 is a side view of the circumference measuring device, and Fig. 4 is a side view of the circumference measuring device. FIGS. 5 and 6 are explanatory diagrams of circumferential length measurement and display of a rod-shaped member. FIG. 7 is a schematic plan view of a conventional circumference measuring device. 8...Spring, 9...Measuring axis, 10...Perimeter measurement display device, 11...Flexible member, 13...
Reciprocating member, 14... Slow movement mechanism, 15...
Damper cylinder, 16... Cylinder rod, 1
8... Spring, 22... Rod return mechanism, 2
6... Operating tool, 27... Rod-shaped member, R... Loop.

Claims

[Scope of utility model registration request]

One end side of a flexible member having a loop formed in its intermediate portion for insertion of a rod-shaped member is fixed, and a reciprocating member is biased and moved in the loop diameter reduction direction by a spring-biased measuring shaft. A circumference measurement and display device connects the other end of the flexible member and measures and displays the circumference of the rod-shaped member inserted into the loop based on the amount of movement of the reciprocating member against the spring. On the other hand, the cylinder rod of the damper cylinder, which moves slowly in one direction,
connecting a second spring that biases and moves the cylinder rod in a slow movement direction and locking and interlocking the cylinder rod with the reciprocating member;
The cylinder rod is configured to apply a braking force to the movement of the reciprocating member in the loop diameter contracting direction, and further includes a rod return mechanism that returns and fixes the cylinder rod to its initial position against the biasing force of both springs. A circumferential length measuring device for a rod-shaped member, characterized in that it is provided with an operating tool for switching the rod return mechanism to an unfixed state.