JPH041447Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dimension measuring scope that measures the dimensions of gaps, holes, etc. inside a structure through an optical fiber inserted therein.

[Problems that conventional technology and ideas try to solve]

2. Description of the Related Art Optical fiberscopes, in which an optical fiber is connected to an eyepiece, are conventionally known in order to simply observe the structure behind the structure through holes, gaps, etc. in the front surface of the structure. However, although dimensions of internal holes, gaps, etc. can be estimated, it has not been possible to actually measure them.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a dimension measuring scope that can measure the dimensions of internal structures through optical fibers.

[Means and actions for solving problems]

In order to achieve this objective, the present invention connects a tube with an inner diameter larger than the inner diameter of the optical fiber to the tip of the optical fiber, and arranges a transparent body with a scale in the opening at the tip of the tube. As a result, not only can the inside be observed within the range where the inner diameter of the cylinder is increased, but also the dimensions can be measured by applying the transparent body with a scale to the part to be measured.

[Example of idea]

FIG. 1 shows a first embodiment of the invention. In the figure, 1 is a flexible pipe that houses an observation optical fiber and an illumination fiber. Reference numeral 2 denotes an eyepiece section equipped with a grip 3, which incorporates an eyepiece lens for magnifying the incident image of the optical fiber for observation, and also incorporates a light emitter that is powered by a battery 4 when observing dark areas. The illumination fiber is adapted to transmit illumination light to the illumination fiber.

Although such a structure itself is well known, pipe 1
According to the present invention, a luminescent cylinder 6 is connected to the tip of the tube. The inner diameter of the cylinder 6 is larger than the summed outer diameter of both optical fibers connected to the center of the rear wall. Further, a semicircular transparent plate 7 having scales 7a at intervals of, for example, 1 mm in the vertical direction is adhered to the opening at the tip of the cylinder 6. Figure 1b
When measuring the width dimension a of the internal structure 8 as shown in FIG.
Thereby, the width dimension of the internal structure 8 is read from the scale 7a located at the upper and lower ends of the internal structure 8.

Figures 2 and 3 show a second embodiment particularly suitable for measuring the dimensions of gaps or holes with a flat bottom. 10 is a substantially tunnel-shaped cylinder having a flat bottom surface 10a, and its tip opening 11 is formed as an inclined surface. On the semicircular side of this surface, a transparent plate 12 having a scale 12a in a direction perpendicular to the bottom surface 10a is adhered around the periphery. A U-shaped notch 10b is formed at the center of the tip of the bottom surface 10a so that the lower end of the scale 12a can also be seen. The scales 12a are provided at wider intervals in accordance with the degree of inclination of the transparent plate 12 so that the projection onto the orthogonal plane of the bottom surface 10a is the actual size. Cylinder 10
A screw hole is formed at the rear end of the pipe 1 so as to be screwed into a threaded rotating collar 14 attached to a ring 13 fitted into the tip of the pipe 1. That is, the cylinder 10 is formed as a scale adapter, and can provide compatibility with the cylinder 6 of FIG. 1 formed as a similar adapter or with various types of scale adapters.

When measuring, for example, as shown in FIG. 3a, the tube 10 is inserted into the service hole 1 of the door panel 17.
7a, the reinforcement 18 is inserted between the reinforcement 18 and the stud bolt 18a, with the bottom surface 10a along the reinforcement 18. Then, as shown in FIG. 3b, the stud bolt 18
The gap dimension b is read from the position of the scale 12a in contact with a.

FIG. 4 shows a third embodiment in which the gap width, hole diameter, etc. are measured. At the tip of the pipe 1, a transparent cone 21 made of, for example, acrylic, and provided with a scale 21a is attached to the tip opening of a cylinder 20 as a fixed or replaceable scale adapter as described above. Scale 21
The symbol a corresponds to the outer shape of the cone 21. In the measurement, as shown in FIG. 4b, the cone 21 is inserted into the hole 22 of the internal structure, and the diameter is measured from the scale 21a at the position corresponding to the hole 22.

Incidentally, instead of a tube, a transparent body with a scale can be used as the adapter and can be detachably attached. Dimension values may be attached to the scale.

[Effect of idea]

As described above, according to the present invention, when there is an obstacle in front, it is not only possible to simply observe the inner part, but also to directly measure the dimensions of the internal structure using the scale.

[Brief explanation of the drawing]

FIG. 1 shows a dimension measuring scope according to a first embodiment of the present invention, in which a is a perspective view thereof and b is a perspective view thereof.
2 shows the second embodiment, a is a perspective view of the main part, b is a plan view of the main part, c is a front view of the main part, and d is a cross section taken along line A. Figures 3 and 3 show the measurement state of the dimension measuring scope according to the second embodiment, where a shows the scale adapter set state, b shows the scale state, and Fig. 4. 1 shows a third embodiment, in which a is a perspective view of the main part thereof and b is a diagram showing its measurement state. 6,20...Cylinder, 10...Cylinder, 7,12...
Transparent plate, 21... Cone, 7a, 12a, 21a
……scale.

Claims (1)

[Claims for Utility Model Registration] (1) The rear end of the optical fiber is provided with an eyepiece for magnifying and observing the incident image, and the tip of the optical fiber is connected to a tube with an inner diameter larger than the inner diameter of the optical fiber, A dimension measuring scope consisting of a transparent body with a scale placed in the opening at the tip of this tube. (2) The scope for dimension measurement according to claim 1 of the utility model registration, wherein the transparent body is a flat plate. (3) The dimension measuring scope according to claim 1 of the utility model registration claim, wherein the transparent body has a conical shape. (4) The scope for dimension measurement according to claim 1, 2, or 3 of the utility model registration claim, wherein the transparent body is formed to be detachable from the optical fiber alone or together with the tube.