JPH0434412Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention is designed to improve the horizontal state between various horizontal members and mounting members when performing interior and exterior work on various buildings as well as piping work for bathroom equipment, etc. It relates to a level used for measurement.

[Technical background of the invention and its problems]

As is well known, the level used for this type of purpose is an indispensable tool for the person in charge to proceed with the work while monitoring the horizontal state, which is extremely difficult to accurately measure with the human sense of balance. It is.

However, generally commercially available levels are often carried in a tool box, etc., and most of them are around 300mm to 450mm in length, with the longest one being 600mm. Therefore, if the object whose level is to be measured is long, or if the surface to be measured has irregularities or unevenness, the measurement accuracy may deteriorate and accurate leveling may not be obtained.

[Purpose of invention]

This invention has been devised to solve the above problems, and its purpose is to provide a new, inexpensive level with a relatively simple structure, which can be adjusted in length completely freely depending on the size and shape of the object to be measured, thereby always being able to take accurate horizontal measurements, and which also has the function of being able to shorten the length for easy handling and carrying during normal use and when not in use.

[Summary of the idea]

The outline of the structure of the level device according to the present invention for achieving the above object is as follows: A bubble level tube is embedded in the center of the upper surface of the fixed ruler, and the upper and lower main measuring surfaces are formed into parallel straight lines. A movable ruler having an auxiliary measuring surface that can be expanded and contracted along an extension line of the main measuring surface of the fixed ruler is slidably attached thereto.

[Example of idea]

Hereinafter, the structure and operation of the level according to the present invention will be explained in detail with reference to the drawings of the embodiments.

The drawing shows an example of the most typical implementation structure of the level device of this invention. In the case of this embodiment, the level device H consists of a fixed ruler 1 as the main body and left and right rulers attached to both ends of the fixed ruler. It is composed of a pair of movable rulers 2, 2. Among these, the fixed ruler 1 has the upper and lower main measuring surfaces P ₁ and P ₁ formed in a straight line parallel to each other like a conventional level, and the liquid filled in the transparent tube is placed in the center of the upper surface. A bubble leveling tube 3 is embedded to indicate that the ruler is horizontal when the bubble moves to the center, and both ends of the fixed ruler 1 are divided into two upper and lower pieces 1a and 1b as shown in FIG. The portions where the pieces 1a and 1b face each other are formed into guide surfaces 4a and 4b, which are a combination of inverted trapezoidal and rectangular cross sections. Two recessed holes 5 and 6 are bored at predetermined positions to regulate the amount of water. On the other hand, the movable ruler 2 has upper and lower pieces 1a and 1b at both ends of the fixed ruler 1.
It is a sub-ruler with an I-shaped cross section that is slidably fitted in the longitudinal direction across the space, and the upper and lower flange parts 2a and 2b are fitted with guide surfaces 4a and 4b provided on the upper and lower pieces 1a and 1b of the fixed ruler 1. Matching grooves 7a and 7b of the same shape
The upper surfaces of the opposing side walls with the grooves 7a and 7b in between serve as auxiliary measuring surfaces P ₂ and P ₂ when the movable rulers 2 and 2 are extended left and right.
At the bottoms of a and 7b, an engager 8 is retractably protruded to restrain the movement of the movable ruler 2 at a position that matches the concave holes 5 and 6 on the fixed ruler 1 side when the movable ruler 2 is expanded and contracted to the maximum. It has been set up. In the case of the present embodiment, the engaging element 8 includes a steel ball 8c that is always urged upward by a compression coil spring 8b inside a cylindrical body 8a with a narrowed upper edge.
and a small screw 8 for adjusting the strength of the compression coil spring.
d is used, but a plate spring or the like having a chevron-shaped protrusion extending into the recessed holes 5 and 6 at the tip may also be used.

Since the level H according to the present invention has the above structure, when the movable rulers 2, 2 are pushed into both ends of the fixed ruler 1 as much as possible during normal use or when being carried, the recessed hole near the center of the fixed ruler 1 The engaging element 8 of the movable ruler 2 enters inside and the left and right movable rulers 2, 2 are immovably locked and fixed. In this case, the length of the entire ruler is the same as that of the fixed ruler 1 as shown in FIG. The length L is the same, and the main measurement surface P ₁ of the fixed ruler 1 and the auxiliary measurement surface P ₂ of the movable ruler 2 are flush with each other at the same height, so it is the same as a conventional level. The lower surface of the ruler may be brought into contact with the upper surface of the object to be measured using the handling operation described above, and the horizontal state may be measured while observing the bubbles in the bubble level tube 3 on the upper surface of the fixed ruler 1.

However, if the length of the object whose horizontal state is to be measured is long or the surface to be measured is uneven or uneven, making accurate horizontal measurement difficult,
If the movable rulers 2, 2 are pulled out in the longitudinal direction from both ends of the fixed ruler 1 as shown in the figure, the auxiliary measuring surface P ₂ of the movable rulers 2 _{, 2} will be drawn along the extension line of the main measuring surface P 1 of the fixed ruler 1. , P ₂ is extended correctly and infinitely,
Main measurement plane P ₁ and auxiliary measurement plane of both rulers 1 and 2, 2
P ₂ , P ₂ can be used in combination to measure the horizontal state extremely accurately, and the movable ruler 2 can move within a range of 2 to 30 degrees when the movable ruler 2 starts to move.
The steel ball 8c enters the cylindrical body 8a against the elasticity of the spring 8b and leaves the concave hole 5, and when the movable ruler 2 is pulled out to the maximum, the steel ball 8c moves toward the outside of the concave hole 6. The movable ruler 2 is automatically restrained from moving at that position, and there is no risk that the movable ruler 2 will be pulled out any further and deviate from the fixed ruler 1.The maximum length _L1 of the entire ruler is Recessed holes 5, 6
Since the distance between them can be greatly extended to L ₁ =L+2 in the drawing, this length can be used to perform horizontal measurements with very high precision.

In the case of this embodiment, a pair of movable rulers 2 are attached to both ends of the fixed ruler 1, but when a relatively large extension is not required, only one movable ruler 2 can be attached to one side of the fixed ruler 1. It may also have a structure in which a ruler 2 is attached. In addition, in the drawing, 9 is a vertical level tube attached to the movable ruler 2 on the left side, and 10 is an inclined level tube also attached to the movable ruler 2 on the right side, and the level H equipped with these level tubes 9 and 10 is , it can be used to measure not only horizontal directions but also vertical and inclined surfaces. Further, reference numeral 11 in the drawing indicates a pair of left and right semicircular recesses provided on the lower surface of the fixed ruler 1, for example,
When performing plumbing work in bathrooms, etc., two branch pipes 12, 12
When the pipes are arranged in parallel in the horizontal direction, the recessed parts 11, 11 are connected to the branch pipes 12, 1 as shown in FIG.
It is extremely convenient to measure the horizontal state by engaging the upper half of the device.

[Effect of idea]

As described above, if this idea is applied to a level, the entire length of the level can be expanded or contracted completely according to the size and form of the object to be measured, and the main measuring surface of the fixed ruler and the auxiliary measuring surface of the movable ruler can be used. The structure of the level itself is simple because it can be used in conjunction with a measurement surface to always perform accurate horizontal measurements, and the length can be greatly shortened for convenient handling and carrying during normal use and when not in use. Coupled with the fact that it can be manufactured at a relatively low cost, it exhibits a remarkable usability effect.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of a concrete implementation structure of the level according to the present invention, FIG. 2 is a plan view,
Figure 3 is an enlarged sectional view taken along line A-A in Figure 1;
The figure is an enlarged cross-sectional view taken along line B-B in Figure 1, Figure 5 is an enlarged cross-sectional view taken along line C-C in Figure 1, and Figure 6 is an enlarged cross-sectional view taken along line C-C in Figure 1.
Figure 7 is an enlarged sectional view taken along line D-D, Figure 7 is a front view showing the left and right movable rulers in a compressed state, Figure 8 is a plan view, and Figure 9 is a concave cutout on the lower surface of the fixed ruler. FIG. H...Level, _P1 ...Main measurement surface, _P2 ...Auxiliary measurement surface, 1...Fixed ruler, 1a...Top piece, 1b...
...lower piece, 2...movable ruler, 3...bubble level tube,
4a, 4b...guiding surface, 5, 6... recessed hole, 7a,
7b...concave groove, 8...engaging element, 8a...cylindrical body, 8
b...Compression coil spring, 8c...Steel ball, 8d...
Machine screw, 9... Vertical level pipe, 10... Inclined level pipe, 11... Concave notch, 12... Branch pipe.

Claims (1)

[Scope of utility model registration request] A bubble level tube 3 is buried in the center of the upper surface, and semicircular recessed portions 11 are provided on the left and right sides of the lower surface.The fixed ruler 1 is provided with semicircular recesses 11 on the left and right sides of the fixed ruler 1, which is located laterally from at least one end and is flush with the upper and lower main measurement surfaces P1 of the fixed ruler. Extend pieces 1a and 1b,
While providing appropriate recessed holes 5 and 6 on the inner surfaces of the upper and lower pieces,
The movable ruler 2 is provided with an auxiliary measuring surface P2 flush with the main measuring surface on the upper and lower sides, and fitting grooves 7a and 7b in the upper and lower pieces, and a locking element 8 that locks into the recessed hole in the upper and lower pieces is provided on the movable ruler. A level device is provided with a movable ruler that cannot be removed and is slidably attached along an extension line of the main measuring surface.