JPH0351697Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] The present invention is a figure measuring device, such as a planimeter with or without an integrating wheel, a kirubimeter, a coordinate measuring device, etc., which measures the figure to be measured by moving it over a written surface. Regarding.

Conventionally, in such a planimeter device with an integrating wheel, the integral amount of area has been detected by rolling the integrating wheel provided on the measuring rod. Furthermore, in planimeters and coordinate measuring instruments that do not have an integrating wheel, detection in the X direction is performed by rolling the X detection wheel. However, these measuring wheels such as the integrating wheel or the X detection wheel cause slight changes in the measured values depending on the quality of the paper on which the figure is written and the friction condition of the paper surface. For example, if the paper is soft, the device may sink due to its own weight, and if the paper is slippery, errors may occur due to slipping of the wheels.

The present invention has been devised to eliminate these drawbacks, and provides a graphic measuring device having an X detection wheel and an integrating wheel that can adjust and correct the above-mentioned subtle errors.

[Structure of the idea]

FIG. 1 is a plan view of a planimeter without an integrating wheel according to an embodiment of the present invention. Two X detection wheels 2 installed at both ends of the main body 1, which moves only in the X direction, detect the
Detect the amount of directional movement. A figure tracing device 5 is provided at the tip of a measuring rod 4, which is provided on the main body 1 to be rotated in the horizontal direction by a vertical shaft 3. In the case of a planimeter with an integrating wheel, an integrating wheel 6 is provided between the vertical axis 3 of the measuring rod and the figure tracing device 5 at the tip, as shown by the dotted line in Figure 1, to detect the integrated amount of area. These contact measuring wheels such as the X detection wheel 2 or the integrating wheel 6 are provided with an outer circumference adjusting device in order to adjust the delicate errors as described above. Figures 2 and 3 show the X detection vehicle 2.
and a sectional view of the integrating wheel 6.

First, the X detection wheel 2 shown in FIG. 2 will be explained.

A contact ring 9 having an outer circumference larger than the outer circumference of the wheel body 7 and the restraining lid 8 of the X detection vehicle 2 is attached to the wheel body 7.
It is provided so as to be held between the holding lid 8 and the holding lid 8. This contact ring 9 is made of an elastically deformable material,
A tapered ring having a cylindrical outer surface and a tapered inner surface is in contact with the inner surface of the contact ring 9. This taper ring may be an independent taper ring 10 that can be elastically deformed, or it may be formed from a part of the wheel body 7, which has a structure in which the wheel body 7 protrudes in an annular shape and has a thin cut so that the outer circumference can be adjusted as shown in FIG. A tapered ring portion _7-1 may also be used. A ring screw 11 having a tapered surface that is slidably inscribed in the tapered surface of the inner surface of the tapered ring 10 or the tapered ring portion 7 _-1 is screwed into the wheel body 7 .

FIG. 3 is a cross-sectional view of the integrating wheel 6, and the structure of the outer circumference adjustment is the same as that in FIG. 2, so the parts corresponding to those in FIG. The ring 10 employs the independent tapered ring described above.

[Effect of idea]

As described above, according to the present invention, when the screwing amount of the ring screws 11, 11' is adjusted according to the paper quality used for measurement or the friction condition of the paper surface, the tapered ring portion _7-1 or the tapered ring 10 expands outward. , the paper contact rings 9, 9' are pushed out uniformly over the entire circumference to adjust the outer circumference. As a result, it is possible to correct subtle errors caused by the way the paper sinks due to the hardness or softness of the paper and the way it slides due to differences in the frictional state of the paper surface.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an integral wheel type planimeter according to an embodiment of the present invention, Fig. 2 is a sectional view of an X detection wheel, and Fig.
The figure is a cross-sectional view of the integral wheel. 2...X detection car, 6...integrator car, 7,7'...
Wheel body, 9, 9'...paper contact ring, 10...taper ring, 11, 11'...ring screw.

Claims (1)

[Scope of utility model registration request] In a figure measuring device, an elastically deformable contact ring is provided on the outer periphery of the contact measuring wheel such as an An elastically deformable tapered ring with a tapered surface on the inside,
A paper contact measurement wheel for a pattern measuring device, which is provided with an X detection wheel and an integral wheel, which are provided with a ring screw having a tapered surface on its outer surface so as to be in sliding contact with the inner tapered surface of the tapered ring.