Device facilitating steel ruler to be hung upside down to measure height of control points

Abstract

The invention relates to a measuring auxiliary device, in particular to a device facilitating a steel ruler to be hung upside down to measure the height of control points. The device facilitating thesteel ruler to be hung upside down to measure the height of the control points comprises a fixing plate; fixing claws are arranged at the edge of the fixing plate; a sliding groove is formed in the center line of the fixing plate; a protective cover is arranged at the upper end of the fixing plate corresponding to the sliding groove, and a plurality of sliding plates are mounted in the sliding groove; vertical rods are fixed to the centers of the bottoms of the sliding plates, and the other ends of the vertical rods are connected with hooks; an open hole is formed in the lower portion of the fixing plate, and a cavity is formed between the open hole and the sliding groove; and springs are arranged on the parts, close to the open hole, of the bottoms of the sliding plates, and supporting plates are fixed to the upper ends of the springs. According to the device facilitating the steel ruler to be hung upside down to measure the height of the control points, the multiple hooks are arranged, thus hanging of the steel ruler is facilitated, the measuring efficiency is improved, and the time and labor are saved; and after one-time measurement is completed, the steel ruler is taken down, the springs drive the supporting plates to bring the sliding plates back into the sliding groove, and thus using for measuring again is facilitated.

Description

technical field [0001] The invention relates to a measurement auxiliary device, in particular to a high control point device for a convenient steel ruler hanging upside down. Background technique [0002] The control point and temporary turning point buried in the roof of the underground roadway need to measure the height of the instrument and the target height during the construction and setting out. When measuring the distance with a steel ruler, construction workers often bury nails or copper rods at the point to be measured, then hang the steel ruler on the buried nails or copper rods, and then measure. [0003] However, in the actual measurement process, it is difficult to hang the steel ruler on the buried nail, and sometimes it needs to try many times, which is time-consuming and laborious. How to solve the difficult operation problem when measuring point elevation and improve the measurement efficiency has become an urgent problem to be solved. Contents of the inv...

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Problems solved by technology

[0003] However, in the actual measurement process, it is difficult to hang the steel ruler on the buried nail, and sometimes it needs to try many times, which is time-consuming and laborious

How to solve the problem of difficult operation when measuring the elevation of points, and improve the measurement efficiency has become an urgent problem to be solved

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