JPH0516486Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to a wall thickness measuring instrument that measures the wall thickness by making a small hole in the wall of a reinforced concrete structure, etc., and inserting it into the small hole. .

Conventionally, in order to measure the thickness of a wall of a reinforced concrete structure, etc., as shown in FIG. Insert the measurer 16 into the small hole 14 until its tip touches the batten 15 and mark the scale 17.
The method of reading was done.

Problems that the invention aims to solve When drilling a small hole in the wall of a reinforced concrete structure and measuring its thickness, in order to insert a batten from the back of the wall, the person reading the measure must hold the batten. There is a problem in that extra personnel are required for measurements, and wall thickness measurements are often performed for the purpose of obtaining analytical data for vibration experiments on test specimens. In most of the test specimens, there were areas behind the wall where people could not enter, and there was a problem in that it was not possible to accurately measure the wall thickness from one side of the wall.

Means for Solving the Problems In order to solve the above problems, this invention involves drilling a long groove in the longitudinal direction of the top surface of a rod-shaped body with graduations, and attaching a rear end to the tip of the rod-shaped body. A cut groove with a downward slope is provided so as to communicate with the long groove, and an engagement piece having a slope at its tip that matches the slope and a weight on the other end is fitted into the cut groove for engagement. The push rod is mounted in the long groove such that the center portion of the piece is rotatably pivoted within the cut groove, and the tip of the push rod comes into contact with the weight of the engagement piece when the engagement piece is perpendicular to the rod-shaped body. The method consists of a wall thickness measuring device for reinforced concrete walls that is installed in a manner that allows it to move forward and backward.

Function The function of this invention will be explained with reference to the drawings of the embodiment.

To measure wall thickness using the wall thickness measuring device of this invention, insert the wall thickness measuring device into the small hole 14 of the wall 13 so that the engaging piece 9 is in line with the rod-shaped body 1, as shown in FIG. Insert it in the state shown in Figure 1. Next, when the rod-like body 1 is rotated 180 degrees as shown in FIG. 7, the engaging piece 9 is rotated 90 degrees in the direction of the arrow due to the weight of the weight 8, as shown in FIG. Next, as shown in FIG. 9, pull the rod-shaped body 1 to the right so that the engaging piece 9, which is perpendicular to the rod-shaped body 1, comes into contact with the wall 13, and in this state, attach it to the rod-shaped body 1. Measure the wall thickness by reading the scale 2. To pull out the wall thickness measuring instrument after measurement, push the rod 1 to the left as shown in FIG. 10, then rotate the rod 1 180 degrees as shown in FIG. is in a state with the weight 8 facing up as shown by the two-dot chain line, and rotates 90 degrees in the direction of the arrow due to the weight of the weight 8, so that the slope 6 of the locking piece 9 matches the slope 4 of the cut groove 5. Therefore, the locking piece 9 does not rotate any further and becomes in a straight line with the rod-shaped body 1, and when the rod-shaped body 1 is pulled out to the right as shown in FIG. 12, it can be extracted from the small hole 14 in the wall 13.

In the state shown in FIG. 11, if the engaging piece 9 does not rotate properly, move the push rod 11 as shown in FIG.
When the weight 8 is brought into contact with the tip of and the push rod 11 is pushed to rotate the weight 8 in the direction of the arrow,
Thereafter, the weight 8 begins to rotate as shown by the two-dot chain line due to its own weight, and the engaging piece 9 can be rotated until it is aligned with the rod-shaped body 1.

Embodiment An embodiment of this invention will be described based on the drawings.

As shown in FIGS. 1 to 5, the wall thickness measuring device for reinforced concrete walls of this embodiment has a scale 2 on the side surface of a rod-shaped body 1, and a scale 2 on the upper side of the rod-shaped body 1 in the direction of its length. A long groove 3 is bored in the rod-shaped body 1, and in connection with this, a cut groove 5 with a slope 4 at the rear end is cut at the tip of the rod-shaped body 1. An engagement piece 9 having a slope 6 that matches the slope 4 of the groove 5 is inserted into the engagement piece 9, and a weight 8 is connected to the rear of the engagement piece 9. The engagement piece 9 is pivotally attached to the rear of the rod-like body 1, and can freely move forward and backward into the long groove 3. Push rod 11 inserted into
It is made by fixing a retaining ring 12.

Effects of the invention This invention has a structure in which the weighted engagement piece is pivotally attached to the tip of the rod-shaped body, so even if a person cannot enter the back side of the wall, one person can easily, reliably and quickly access it from one side of the wall. Can measure wall thickness with good accuracy,
Also, since it is equipped with a push rod, it is possible to easily and reliably remove the measuring instrument from the wall hole.

[Brief explanation of drawings]

Figures 1 to 5 show one embodiment of this invention; Figure 1 is a front view, Figure 2 is a plan view thereof, and Figure 3 is a push rod removed and an engaging piece placed perpendicular to the rod-shaped body. 4 is a plan view thereof, FIG. 5 is a side view thereof, and FIGS. 6 to 13 are partially cut-away illustrations showing how the wall thickness measuring instrument of the above embodiment is used. 14 are partially cutaway front views showing a conventional example. 1... Rod-shaped body, 2... Scale, 3... Long groove, 4...
... slope, 5 ... cut groove, 6 ... slope, 7 ... elongated piece, 8 ... weight, 9 ... engagement piece, 10 ... pivot, 11 ... push rod.

Claims (1)

[Scope of utility model registration request] A long groove 3 is bored in the length direction of the upper surface of the rod-shaped body 1 with a scale 2 on the side surface, and the rod-shaped body 1
A cut groove 5 with a downward slope 4 at the rear end is provided at the tip so as to communicate with the long groove 3, and the slope 4 is provided at the tip.
An engaging piece 9 having a weight 8 on the other end of the elongated piece 7 having a slope 6 that matches is fitted into the cut groove 5 so that the engaging piece 9 can rotate within the cut groove 5 at its center. The push rod 11 is fitted into the long groove 3 so that it can move forward and backward so that the tip of the push rod 11 comes into contact with the weight 8 of the engagement piece 9 when the engagement piece 9 is perpendicular to the rod-shaped body 1. Wall thickness gauge for reinforced concrete walls.