JPH0637281Y2 - Pin gauge - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a pin gauge used for precision measurement such as hole diameter measurement of a workpiece or center-to-center measurement of holes.

[Prior Art] This type of pin gauge has a pin-shaped body having an outer diameter of, for example, 15 mm ± 0.005 mm or 18 mm ± 0.0, as disclosed in Japanese Utility Model Laid-Open No. 48-22574.
It is known that it is manufactured with a high precision of 015 mm. And generally, the overall accuracy of the outer diameter is displayed on the surface of the taper gauge.

Then, for example, insert a pin gauge into the hole machined in the workpiece and use it as a through / stop plug gauge, or insert each into two holes and measure between each pin gauge with a micrometer to measure the center of the hole. It is used to measure

Also applicable to hole position measurement, hole inclination measurement, R measurement, hole eccentricity measurement, V groove parallelism measurement, groove depth measurement, gear tooth groove deviation measurement, drill chuck core deviation measurement, etc. Has been done.

[Problems to be Solved by the Invention] However, as described above, since the pin-shaped body has a cylindrical shape, it is uncertain to the user at which position on the outer circumference in the axial direction the outer diameter accuracy is guaranteed. In some cases, it is not economical in terms of processing to guarantee the outer diameter accuracy at all positions with high accuracy.

[Means for Solving the Problems] The present invention is intended to solve these disadvantages, and the gist thereof is that the pin-shaped body is manufactured with a guaranteed outer diameter accuracy. A pin gauge, characterized in that a precision guarantee display portion is provided on the surface of the pin-shaped body to limit and display the specific area where the accuracy of the outer diameter is guaranteed.

[Operation] The accuracy of the outer diameter is guaranteed in the specific area limitedly displayed by the accuracy assurance display section provided on the surface of the pin-shaped body.

[Embodiment] FIGS. 1 to 7 show an embodiment of the present invention, FIGS. 1 to 3 show the first embodiment, and FIG. 4 shows the second embodiment, 5, 6,
FIG. 7 shows the third, fourth and fifth embodiments, respectively.

Reference numeral 1 denotes a pin-shaped body, and a precision guarantee display portion 2 for limiting and displaying a specific region M in which the outer diameter precision is guaranteed is provided on the surface of the pin-shaped body 1 having a cylindrical shape. In this case, the accuracy guarantee display section 2 is formed by arranging four triangular marks 2a in an annular shape, and the marks are formed by printing on the surface of the pin-shaped body 1 by, for example, a laser printing machine or an electroerosion machine, The specific area M surrounded by the triangular mark 2a, in this case, the specific area M surrounded by the dotted line shown in FIG.

Also, although not shown, there is a pin-shaped body 1 on the surface of which the outer diameter and the overall accuracy are printed.

Since the first embodiment has the above-mentioned configuration, the specific area M in which the outer diameter accuracy is guaranteed can be clearly recognized by the accuracy assurance display portion 2 provided on the surface of the pin-shaped body 1, and therefore, the use thereof is possible. The person can work with peace of mind by measuring at the outer diameter position within the specific area M limitedly displayed by the accuracy guarantee display unit 2, and thus the measurement accuracy can be improved and the workability of the measurement can be improved. Further, it is possible to improve the economical efficiency in terms of processing.

The second embodiment of FIG. 4 shows another structure, in which case the accuracy guarantee display section 2 has four triangular marks similar to those of the first embodiment.
The specific area M formed by arranging 2a in an annular shape is displayed,
The accuracy guarantee display portions 2 are formed on the surface of the pin-shaped body 1 at three axial positions.

The third embodiment shown in FIG. 5 also shows another structure, in which the accuracy guarantee display portion 2 is formed by a square frame and four projecting lines, and within the specific area M surrounded by the square frame 2a. This is to display that the outer diameter accuracy of is guaranteed.

The fourth embodiment shown in FIG. 6 also shows another structure, in which the accuracy guarantee display portion 2 is formed by a circle and four projecting lines.
It is displayed that the accuracy of the outer diameter in the specific area M surrounded by the circular frame 2a is guaranteed.

The fifth embodiment of FIG. 7 also shows another structure, in which the accuracy guarantee display portion 2 is formed by a diamond and four projecting lines, and the outside of the specific area M surrounded by the diamond 2a. This is to display that the diameter accuracy is guaranteed.

Even in the second, third, fourth, and fifth embodiments, the same operational effect as that of the first embodiment can be obtained.

The present invention is not limited to the above-described embodiment, and for example, in the first embodiment, the accuracy guarantee display part 2 may be formed at several places, for example, four places on the same circumference. The mark and the like are designed by appropriately changing them.

[Advantage of the Invention] As described above, the present invention limits the display of the specific area in which the outer diameter accuracy is guaranteed by the accuracy guarantee display portion provided on the surface of the pin-shaped body, so that the outer diameter accuracy is guaranteed. It is possible to clearly recognize the area in which it is present, and therefore the user can work with peace of mind by measuring at the outer diameter position within the specific area that the accuracy guarantee display section displays limitedly. In addition to improving the workability of measurement, it is not always necessary to guarantee the entire outer diameter, and the economical efficiency can be improved in terms of processing.

As described above, the intended purpose can be sufficiently achieved.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an overall perspective view of the first embodiment, FIG. 2 is a front view thereof, FIG. 3 is a partially enlarged view thereof, and FIG. An example front view, FIG. 5 is a partially enlarged view of the third embodiment, FIG. 6 is a partially enlarged view of the fourth embodiment, and FIG. 7 is a partially enlarged view of the fifth embodiment. 1 ... Pin-shaped body, 2 ... Accuracy guarantee display section, M ... Specific area.

Claims (1)

[Scope of utility model registration request] 1. A guarantee of accuracy in which the pin-shaped body is manufactured with a guaranteed outer diameter accuracy, and the pin-shaped body is limited to display a specific area where the outer-diameter accuracy is guaranteed on the surface of the pin-shaped body. A pin gauge characterized by being provided with a display unit.