JP5268179B2 - Telescopic measuring scale - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expansion/contraction length indication type surveying level rod capable of showing automatically by a simple structure, a height of the surveying level rod which is changed by being slidingly-expanded/contracted. <P>SOLUTION: A slide part constituting a surveying level rod lower part 15 is slid with respect to a slide guide part constituting a surveying level rod upper part 13, to thereby expand/contract the whole surveying level rod 3. Sliding of the surveying level rod lower part 15 is performed on the back side of the surface 19 of the surveying level rod upper part. Hereby, the upper side of a total scale 17 is hidden from the surface 19 of the surveying level rod upper part by sliding, and a residual lower side is exposed. The total scale 17 has a total dimension value determined by totalizing a dimension of the surveying level rod upper part 13 to a dimension from the lower end 21 of the surveying level rod lower part 15. Consequently, a numerical value of an upper end exposed to the surface side indicates a dimension of the whole surveying level rod 3 which is changed by being expanded/contracted. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a structure of a surveying staff for measuring unevenness of a floor, for example.

For example, it is necessary to accurately measure the unevenness of a concrete floor formed by pouring concrete in a building under construction or expansion / renovation.
This measurement is performed as follows, for example. That is, one worker supports the surveying staff on the floor vertically with the lower end in contact. Other workers install a level which is a surveying instrument on a reference floor surface away from the surveying ruler. The level of the surveying instrument is set horizontally above a reference floor surface, for example, about 150 cm, and is a built-in optical instrument that can be viewed in an enlarged manner at the horizontal position. A target scale provided above a certain distance from the lower end of the surveying scale is aimed at by the level as the surveying instrument.

  If the concrete floor has irregularities and the part that supports the surveying standard is a concave part, the surveying standard will sink and the aim will be shifted upward. On the contrary, if it is a convex part, it will shift down. The size of the unevenness is measured by reading the magnitude of this deviation with a target scale enlarged through the level of the surveying instrument. Such measurement is performed at various points on the floor, and the unevenness of the entire floor is measured.

  There are other measurement methods for measuring the unevenness of the floor. For example, measurement using laser light. That is, using a measuring instrument called a laser leveling device, the laser leveling device is installed horizontally by a bubble tube, irradiated with a laser beam parallel to the horizontal plane, and the reflected light is reflected on the target scale of the measuring scale. On the top, check visually and measure the size of the irregularities.

As a surveying standard used in the measurement using the laser beam, there is one that is shown in the following Patent Document 1 and slides in the vertical direction to expand and contract.
US Patent 006760974

  If the measuring scale is slid up and down to expand and contract, the target scale height of the measuring scale can be changed by expansion and contraction without setting the height of the laser level from the floor accurately. Therefore, it can be freely adjusted to the height of the laser level and work is convenient. This is because the laser level is installed on a tripod, and it is difficult to set the height accurately using the tripod.

For example, when the height of the installation surface changes depending on where the installation surface on which the laser level is installed is selected, the height of the laser level that is easy to work changes depending on the height and preference of the operator. Especially useful when, etc.
The same can be said for the measurement using the level of the surveying instrument as well as the measurement using the laser level.

However, it is necessary to measure during the work how much the level plane on which the level of the laser leveler and surveying instrument is installed, that is, the level of the horizontal reference plane from the design floor surface. .
That is, on the nth floor of the building under construction, a mark Hn indicating the height of the reference floor horizontal reference plane is marked on a scaffold or the like. The mark Hn is set to, for example, uniformly 1000 mm from the design floor of each floor. The horizontal reference plane for work on each floor is set to an arbitrary height separately from the floor horizontal reference plane because of the height of the worker's back and the height at which the level of the surveying instrument is easy to operate. For example, it is set to 1480 mm from the designed floor. The correspondence between the arbitrarily set height of the horizontal reference plane and the height of the floor horizontal reference plane must be accurately grasped.
The horizontal reference plane for this work is set separately according to the necessity, for example, when there is a step of 5 cm to 20 cm on the veranda, open corridor, entrance, water circumference, children's room, living room, and each floor. The For example, the veranda is 1480mm from the design floor, the open corridor is 1430mm from the design floor, the entrance is 1470mm from the design floor, the water is 1420mm from the design floor, the children's room is 1490mm from the design floor, the living room May be 1460 mm from the design floor. In such a case, it is troublesome to measure the height of the surveying measure that has changed due to expansion and contraction.

  In order to solve the above problems, an object of the present invention is to provide an extendable length display type measuring measure in which the height of a measuring measure that has been expanded and contracted is automatically indicated by a simple structure. To do.

  In order to solve the above problems, the first invention comprises an upper part of a surveying standard, a slide guide part provided with a target scale on the surface, guided by the slide guide part, and a lower part of the measurement standard. The slide part that is configured to slide on the back side of the surface of the slide guide part and the surface of the lower part of the surveying standard, and the dimension from the lower end of the lower part of the measurement standard is the sum of the dimensions of the upper part of the measurement standard A total scale having a total dimension value, and displaying the overall dimension of the surveying scale that expands and contracts with the slide as a numerical value of the upper edge exposed to the surface side of the total scale. This is a telescopic measurement display measuring scale characterized by the following.

In the second invention, in order to measure the unevenness of the floor, the measurement scale is supported on the floor vertically by contacting the lower end, and a target scale provided above the measurement scale by a certain dimension is used for the measurement. Aiming at the level of the surveying instrument installed horizontally above the fixed dimension on the reference floor surface away from the measuring scale, and measuring the size of the irregularities by reading the magnitude of the deviation of the aim with the target scale Surveying measure,
The upper part of the surveying measure is constituted, and the target scale is provided on the surface with a slide guide part, and the slide guide part is guided to constitute the lower part of the surveying measure, and on the back side of the surface of the slide guide part A sliding portion that slides, and a total scale that is provided on the surface of the lower part of the surveying standard and has a total dimension value that is a sum of the dimensions of the upper part of the surveying standard and the dimension from the lower end of the lower part of the surveying standard. The length of the surveying measuring scale that changes due to expansion and contraction with the slide is displayed with the numerical value of the upper edge exposed on the surface side of the total scale. is there.

  According to the 1st or 2nd invention, the slide part which comprises the lower part of the surveying standard can be slid with respect to the slide guide part which comprises the upper part of the measurement standard, and the whole measurement standard can be expanded and contracted. The slide of the lower part of the surveying measure is performed on the back side of the surface of the upper part of the surveying measure. For this reason, the upper side of the total scale is hidden by the slide from the surface of the upper part of the surveying ruler, and the remaining lower side is exposed. This total scale has a total dimension value that is the sum of the dimensions of the upper part of the surveying standard to the dimension from the lower end of the lower part of the standard for surveying. Therefore, the numerical value of the upper edge exposed on the surface side changes with expansion and contraction. The overall dimensions of the surveying staff will be displayed. Therefore, the height of the surveying standard changed by expansion and contraction is automatically indicated by a simple structure.

An embodiment of the present invention is shown in FIGS.
[Overview of measurement work]
As shown in FIGS. 2 (A) and 2 (B), this embodiment uses the measuring ruler 3 according to this embodiment and the level 5 of the surveying instrument in order to measure the unevenness of the concrete floor.
One worker 7 vertically supports the surveying measure 3 on the floor with its lower end in contact. The other worker 9 installs level 5 which is a surveying instrument on the reference floor surface away from the surveying measure 3. Level 5 which is this surveying instrument is installed horizontally above a certain dimension above the reference floor, for example, 150 cm above. An optical instrument built in level 5 that is in this horizontal position can be enlarged and viewed.

  The other worker 9 looks into this level 5 and aims at a target scale 11 provided above the lower end of the surveying measure 3 by a certain distance. As shown in FIG. 2C, the peeked visual field shows, for example, a reference horizontal line H drawn on the lens of the optical device. Further, the target scale 11 enlarged by the optical device can be clearly seen in the viewed field.

  In the target scale 11, a scale indicating the magnitude of the deviation δ is shown with a +-sign above and below the reference horizontal scale L as a boundary. Therefore, the reference horizontal line H and the reference horizontal scale L are overlapped and visually observed, and the magnitude of the deviation δ between the two H and L is read by the target scale 11, whereby the size of the unevenness of the concrete floor can be measured.

[Surveying measure 3]
As shown in FIG. 1, the surveying measure 3 according to this embodiment includes a surveying measure upper portion 13 and a surveying measure lower portion 15 so that it can slide and expand.
The measurement scale upper part 13 is provided with a target scale 11 on the surface. In addition, the whole has a long and narrow rectangular tube shape and functions as a slide guide portion.
The surveying standard lower part 15 has a smaller rectangular column shape that can be inserted and slid into the rectangular tube shape of the surveying standard upper part 13 and functions as a slide part. The slide portion which is the surveying measure lower portion 15 slides on the back side of the surface of the slide guide portion which is the surveying measure upper portion 13.
In order to fix the state after the slide, a fixing screw 16 is provided. That is, the tip of the male screw with the hand is threaded into and penetrates the female screw provided on the surface of the surveying gauge upper part 13, and the tip of the penetrated screw presses the surface 19 of the surveying gauge lower part 15. Fixing.

  A total scale 17 is provided on the surface of the surveying gauge lower part 15. The total scale 17 has a total dimension value obtained by adding the dimension S2 of the surveying measure upper part 13 to the dimension S1 from the lower end of the surveying measure lower part 15. The dimension S2 of the surveying measure upper part 13 refers to the dimension from the lower end of the surveying measure upper part 13 to the reference horizontal scale L of the target scale 11.

The upper side of the total scale 17 is hidden from the surface 19 of the upper part of the surveying gauge by the slide. The remaining underside is exposed. The boundary is the lower end 21 of the upper part 13 for surveying.
Thereby, the numerical value of the upper edge part exposed to the surface side displays the dimension of the whole surveying ruler 3 which expands and contracts. Therefore, the height of the surveying measure 3 that has changed due to expansion and contraction is automatically indicated by a simple structure. FIG. 3 shows a state in which the measuring staff is slid slightly.

"Other embodiments"
In the above embodiment, level 5 which is a surveying instrument is used for the measurement, but in another embodiment, a laser level may be used. The target scale 11 is irradiated with a laser beam, and a deviation between the portion of the shining line in which the irradiated light is reflected on the target scale 11 and the reference horizontal scale of the target scale 11 is visually confirmed. Measure the thickness.

In the above embodiment, the numerical value of the upper edge portion where the total scale 17 is exposed is instructed by the lower end 21 of the surveying measure upper portion 13, but in other embodiments, a device for instructing more clearly is provided. It does not matter if it is provided. That is, for example, it is also possible to provide a horizontally elongated instruction window at the lower end 21 of the surveying gauge upper portion 13 and to indicate the numerical value of the upper edge portion where the total scale 17 is exposed to this instruction window.
In the above embodiment, the case where the surveying instrument is used has been described. However, in another embodiment, the present invention can be implemented even when the laser level is used.
At that time, instead of irradiating a laser beam parallel to the horizontal plane from the laser level, by irradiating a laser beam parallel to the vertical surface, it is also possible to measure the unevenness of the wall, not the unevenness of the floor. Can be used. Therefore, the unevenness of the formwork on the concrete wall surface is measured, the precision of the formwork is increased before placing the concrete, and then the concrete is placed.
In other words, in order to measure the irregularities of the formwork on the concrete wall, the surveying measure is supported horizontally on the surface of the formwork on the wall with the lower end in contact with it, and a certain dimension upward (lateral direction) from the lower end of this surveying measure A laser beam parallel to the vertical plane is applied to the target scale provided. The reflection of the irradiation light is visually confirmed on the target scale, and the size of the unevenness is measured. Thereby, the unevenness | corrugation of the formwork of a concrete wall surface can be measured, the precision of a formwork can be raised before concrete placement, and concrete can be cast after that, and an accurate concrete wall surface can be constructed | assembled.

BRIEF DESCRIPTION OF THE DRAWINGS It is the expansion-and-contraction display type measuring ruler concerning one Embodiment of this invention, (A) is a front view, (B) is a side view. It shows the state of the measurement work using the telescopic length display type surveying measure according to one embodiment of the present invention, (A) is a front view of the state in which the worker supports the surveying measure, (B) is It is a schematic side view in which a worker handles a level that is a surveying instrument. FIGS. 1A and 1B show a state in which the surveying staff shown in FIG. 1 is slid slightly contracted. FIG. 1A is a front view and FIG. 1B is a side view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Floor, 3 ... Surveying standard, 5 ... Level, 7 ... One worker, 9 ... Other workers, 11 ... Target scale, 13 ... Upper part of surveying standard, 15 ... Lower part of measuring standard, 17 ... Total Scale, 19 ... surface of surveying gauge upper part, 21 ... lower end.

Claims (2)

  The upper part of the surveying ruler, the slide guide part with the target scale provided on the surface, and the slide guide part guided by the lower part of the surveying ruler, sliding on the back side of the surface of the slide guide part A total scale having a total dimension value that is provided on the surface of the lower part of the surveying measure, and has a total dimension value obtained by totaling the dimensions of the upper part of the surveying measure to the dimension from the lower end of the lower part of the surveying measure, An expansion / contraction length display type measuring scale characterized by displaying the overall dimensions of the surveying scale that expands and contracts with the slide as a numerical value of an upper edge exposed to the surface side of the total scale. In order to measure the unevenness of the floor, a surveying measure is supported vertically on the floor with the lower end in contact, and a target scale provided above the surveying measure by a certain distance above is a reference away from the surveying measure. The surveying standard for measuring the size of the unevenness by aiming at the level of a surveying instrument installed horizontally above the fixed dimension on the floor and reading the size of the target deviation with the target scale. And
The upper part of the surveying measure is constituted, and the target scale is provided on the surface with a slide guide part, and the slide guide part is guided to constitute the lower part of the surveying measure, and on the back side of the surface of the slide guide part A sliding portion that slides, and a total scale that is provided on the surface of the lower part of the surveying standard and has a total dimension value that is a sum of the dimensions of the upper part of the surveying standard and the dimension from the lower end of the lower part of the surveying standard. An expansion / contraction length display type surveying measure characterized by displaying the overall dimension of the surveying measure that expands and contracts with the slide as a numerical value of the upper edge exposed to the surface side of the total scale.

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