JPH09156296A - Apparatus for drawing and measuring projection chart of relic such as unearthed article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with a number of apparatuses for measurement and drafting and to enable drawing and measurement of a projection chart of a relic such as an unearthed article, with high accuracy, by very simple operations. SOLUTION: Relative positions of a relic 7 such as an unearthed article and a convex lens 1 in the direction of the optical axis C1 are set so that the relic 7 be positioned at the center C1 of a sphere on the front side of the convex lens 1. Thereby a real image of the relic 7 is cast in equal dimensions on a translucent screen, and after tracing paper, a resin film for tracing or the like is set outside the translucent screen 3, the image is traced on the paper or the film. By this method, it is possible to drawing a projection chart of the relic 7 and to measure the size of the relic 7, the positional relationship thereof in the projection chart and others.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention is capable of drawing projection drawings of various relics such as earthenware, pottery and ceramics excavated in archeological research, and measuring the size based on these drawings. It relates to a device for creating and measuring projections of possible artifacts and other artifacts.

[0002]

2. Description of the Related Art Conventionally, various relics such as earthenware, pottery, and ceramics excavated in archeological research are managed as they are at the time of excavation or after restoration. Create a projection of the morphology or restored morphology, and measure the size based on this projection, management,
In other words, create a projection of the relic on a specified drafting paper,
It is managed in a state in which dimensions indicating the size are entered.

By the way, conventionally, a projection drawing of a relic has been created.
Prepare a large number of measuring and drafting equipment such as a ruler, scale, toescan, compass, single pass, caliper, micrometer, dial gauge, height gauge, etc. for the projection surface of the relic at the time of excavation or the reconstructed relic. In response to changes in the size and shape of relics or changes in the measurement position, the relics are measured by using one of the above-mentioned measurement devices selected as appropriate for the measurement, and based on this measurement value, a predetermined drawing is drawn. This is done by means of creating a projection of the relic on paper.

However, the conventional means for producing a projection drawing of a relic requires a large number of measuring and drawing equipments, and the work is extremely complicated and inferior in workability. Further, since it is practically difficult to avoid a measurement error with the actual product, there is a drawback that high-precision projection drawing cannot be expected. In other words, although it is not possible to create a projection drawing of the shape of a relic, it is quite difficult to create a projection drawing of a complicated pattern or figure on the relic with high accuracy. It hinders management.

[0005]

That is, in the conventional means for creating and measuring projections of relics such as excavated articles, a large number of measuring instruments are required, and the work of creating projections is extremely complicated and the workability is high. However, since a relatively large measurement error is likely to occur, it is not possible to expect a highly accurate projection drawing to be created. As a result, there is a drawback that the highly accurate management of projection views is hindered. Therefore, the present invention eliminates the need for a large number of measuring / drafting equipments, and by extremely simple work, makes a projection drawing of a relic such as an unearthed item and accurately projects the relic of the unearthed item. It is intended to provide a drawing creation / measurement device.

[0006]

In order to achieve the above object, the invention according to claim 1 has a convex lens, a light-shielding box having the convex lens mounted on the front surface, and a spherical center on the rear side of the convex lens. It is characterized by comprising a semi-transparent screen which is positioned and attached to a light-shielding box. The invention according to claim 2 is characterized in that the semi-transparent screen is disposed so as to face the rear side of the convex lens and be orthogonal to the optical axis. In the invention according to claim 3, a reflecting mirror for reflecting the light passing through the convex lens to the upper side is arranged in the light-shielding box, and the semitransparent screen is arranged orthogonal to the reflection optical axis. It is characterized by that. The invention according to claim 4 is characterized in that a first advancing / retreating mechanism for advancing / retreating the convex lens in parallel with the optical axis thereof is provided. The invention according to claim 5 is characterized in that a second advancing / retreating mechanism for advancing / retreating the convex lens orthogonally to its optical axis is provided.

According to the first aspect of the present invention, relics such as excavated articles are positioned so as to be positioned at the spherical center in front of the convex lens.
By setting the relative position of the relic and the convex lens in the optical axis direction, the real image of the relic is projected to the semi-transparent screen in the same size. Therefore, after placing tracing paper or a resin film for tracing on the outside of the semi-transparent screen, make a projection of the relic by tracing on the paper or film, and make the size of the relic and its position in the projection. Relationships and the like can be measured. Claim 2
According to the invention described, after placing a trace paper or a resin film for tracing on the outside of the semitransparent screen at the position facing the rear side of the convex lens, and tracing on the paper or film, a projected view of the relic is obtained. It is possible to create and measure the size of relics and the positional relationship in the projection. According to the invention described in claim 3,
After placing tracing paper or resin film for tracing on the outside of the semi-transparent screen installed on the upper surface of the light-shielding box, trace on the paper or film to create a projection of the relic It is possible to measure the size and the positional relationship in the projected view. According to the invention described in claim 4, after roughly setting the relative position of the relic and the convex lens in the optical axis direction, by slightly moving the convex lens forward and backward in parallel with the optical axis by the first advancing and retracting mechanism, The relic can be clearly projected on the semi-transparent screen by focusing.
Also, by moving the convex lens forward and backward in parallel with the optical axis, the proportion of the size of the relic and the real image of the relic projected on the semi-transparent screen is changed to create a projection drawing of the relic, and It is also possible to measure the size and the positional relationship in the projection drawing by reducing or enlarging. According to the invention of claim 5, after the relative position of the relic and the convex lens in the optical axis direction is roughly set, the convex lens is slightly moved forward and backward by the second advancing and retracting mechanism. By focusing, the relics can be clearly projected on a semi-transparent screen. Also, by moving the convex lens forward and backward orthogonally to its optical axis, the proportion of the size of the relic and the real image of the relic projected on the semitransparent screen is changed to create a projection drawing of the relic and It is also possible to reduce or enlarge the size and the positional relationship in the projected view.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical side view. In this figure, a device for creating and measuring a projection of a relic such as an unearthed item is constructed by a convex lens 1, a light-shielding box 2 having the convex lens 1 mounted on the front surface, and a convex lens 1. It is provided with a semi-transparent screen 3 which is positioned on the spherical center P2 on the rear side and is attached to the light-shielding box 2.

The convex lens 1 is a transparent single body such as glass or transparent plastic surrounded by two spherical surfaces as shown in the figure, the transparent single body surrounded by a spherical surface and a plane, or a composite of the transparent single bodies, or the transparent single body. It is composed of a composite of a simple substance and non-reflective glass. Then, as shown in FIGS. 2 and 3, the movable frame 11 and the fixed frame 12 are attached to the central portion of the tip end of the bellows-shaped stretchable portion 4. That is, the both ends in the width direction of the movable frame 11 into which the outer peripheral edge of the convex lens 1 is fitted are the grooves 12A, 12A formed in the fixed frame 12.
Is slidably fitted to.

The light-shielding box 2 shown in FIG. 1 is a cubic box having light-shielding properties so that light can be prevented from entering from a position other than the convex lens 1 and the semitransparent screen 3. The position of the vertical wall 2A on the side is two times the focal length f2 (2f2) to the focal point F2 on the rear side when the convex lens 1 is positioned at the central portion in the expansion / contraction direction of the horizontally extending bellows-shaped expansion / contraction portion 4. ), That is, the spherical center P2 on the rear side of the convex lens 1
The vertical wall 2A on the rear side is opened, and the opening is closed by the semi-transparent screen 3. A ground glass plate is suitable as the semi-transparent screen 3.

The bellows-shaped expansion / contraction part 4 has a first advance / retreat moving mechanism 5.
The convex lens 1 moves forward and backward in the direction of the optical axis C1. The first advancing / retreating mechanism 5 is attached to the fixed frame 12 so as to approach both sides in the width direction of the bellows-shaped stretchable section 4 below the inside of the bellows-shaped stretchable section 4 and horizontally in the direction of the rear vertical wall 2A. A pair of upward facing racks 5A (however, only one rack is shown in FIG. 1) and a pinion 5 that meshes with the racks 5A.
B, power transmission mechanism 5C including a belt and a pulley
The first dial 5D is connected to the light-shielding box 2 outside the width direction of the light-shielding box 2.

The convex lens 1 has a second advancing / retreating movement mechanism 6
Is moved up and down in the vertical direction. The second advancing / retreating mechanism 5 is attached to both sides of the back surface of the movable frame 11 and extends in the vertical direction.
(Only one rack is shown in FIG. 1), and a second dial 6C attached to the pinion 6B and the pinion shaft that mesh with the rack 6A. It is provided outside the direction. In addition, 10 in the figure shows a light-shielding cover.

In the above structure, a light-shielding box 2 is set on the upper surface of a projection drawing / measuring board 9 such as a desk, and a relic 7 such as an unearthed article is focused to the focal point F1 on the front side of the convex lens 1. Distance twice the distance f1 (2f
The relative position of the relic 7 and the convex lens 1 in the direction of the optical axis C1 is set by positioning at the spherical center P1 corresponding to 1). That is, the relic 7 is located at the spherical center P1 when the convex lens 1 is located at the center of the horizontally extending bellows-shaped stretchable portion 4 in the stretchable direction. As a result, the real image of the relic 7, more specifically the inverted real image, is projected on the semi-transparent screen 3 in the same size. Therefore, after a trace paper or a resin film for tracing is set outside the semitransparent screen 3, the projected relic 7 is created by tracing the relic 7 that is projected on the paper or the film, and It is possible to easily and accurately measure the size of the relic 7 and the positional relationship within the projection. That is, a large number of measuring / drafting devices are not required, and the projection drawing and measurement of the relic 7 such as an unearthed product can be made and measured with high accuracy by an extremely simple operation.

On the other hand, the first advancing / retreating mechanism 5 is operated by the first advancing / retreating mechanism 5 after the first advancing / retreating mechanism 5 is operated to roughly set the relative position of the relic 7 and the convex lens 1 in the optical axis C1 direction. By moving the lens slightly forward and backward in parallel with the optical axis C1, the relic 7 can be clearly projected on the semitransparent screen 3 for focusing. In addition, the bellows-shaped expansion / contraction part 4 is extended to advance the convex lens 1, and the relic 7
Is located between the front spherical center P1 and the front focal point F1, an inverted real image larger than the relic 7 is projected on the semitransparent screen 3. Therefore, after placing a trace paper or a resin film for tracing on the outside of the semi-transparent screen 3, the relics 7 that are projected are traced on the paper or the film to create an enlarged projection view of the relics 7, Moreover, it is possible to easily and accurately measure the size of the relic 7 and the positional relationship in the projection drawing. That is, a large number of measuring / drafting equipments are not required, and it is possible to accurately create and measure an enlarged projection drawing of the relic 7 such as an unearthed product by extremely simple work.

On the other hand, in the state of FIG. 1, the first advancing / retreating movement mechanism 5 is operated to shorten the bellows-shaped expansion / contraction portion 4 to retract the convex lens 1 and position the relic 7 outside the front spherical center P1. As a result, an inverted real image smaller than the relic 7 is projected on the semitransparent screen 3. Therefore, the translucent screen 3
After placing tracing paper or resin film for tracing on the outside of the, the traced relics 7 are traced on the paper or film to create a reduced projection view of the relics 7 and the size of the relics 7. It is possible to easily and accurately measure the positional relationship and the like in the projection drawing.
That is, a large number of measuring / drafting equipments are not required, and it is possible to accurately create and measure an enlarged projection drawing of the relic 7 such as an unearthed product by extremely simple work.

FIG. 4 shows an embodiment of the invention described in claim 3. The same or corresponding parts as those in FIG. 1 are designated by the same reference numerals, and detailed description of the structure and operation will be omitted. In FIG. 4, the semi-transparent screen 3 is installed orthogonal to the optical axis C1 on the rear side of the convex lens 1, and the convex lens 1 is provided between the semi-transparent screen 3 and the convex lens 1.
Reflecting mirror 8 that reflects the light that has passed through to the semitransparent screen 3.
Is arranged. That is, the position of the ceiling 2B of the light-shielding box 2 is twice the focal length f2 on the rear side when the convex lens 1 is located at the center in the expansion / contraction direction of the horizontally extending bellows-shaped expansion / contraction part 4, that is, A position where the sum of the length of the optical axis C1 from the center line C2 of the convex lens 1 to the reflecting mirror 8 and the reflecting optical axis C1 'from the reflecting mirror 8 to the semitransparent screen 3 is twice the focal length f2 (rear side Is set to the spherical center P1), the ceiling 2B is opened, and the opening is closed by a semitransparent screen 3.

According to the above construction, the relative position of the relic 7 and the convex lens 1 in the optical axis C1 direction is set so that the relic 7 such as an unearthed article is positioned at the spherical center P1 on the front side of the convex lens 1. That is, the relic 7 is located at the spherical center P1 when the convex lens 1 is located at the center of the horizontally extending bellows-shaped stretchable portion 4 in the stretchable direction. As a result, the real image of the relic 7 is projected on the semitransparent screen 3 in the same size. Therefore, after the tracing paper or the resin film for tracing is placed outside the semitransparent screen 3, the projected relic 7 is created by tracing the relic 7 that is projected on the paper or the film, and It is possible to easily and accurately measure the size of the relic 7 and the positional relationship within the projection. That is, a large number of measuring / drafting devices are not required, and the projection drawing and measurement of the relic 7 such as an unearthed product can be made and measured with high accuracy by an extremely simple operation.

In the state shown in FIG. 4, the first advancing / retreating mechanism 5 is operated to slightly advance / retreat the convex lens 1 in parallel with the optical axis C1 thereof, thereby focusing the relic 7 and making the relic 7 clear and semitransparent. It can be projected on the screen 3. In addition, by extending the bellows-shaped expansion / contraction part 4 to move the convex lens 1 forward so that the relic 7 is located between the front spherical center P1 and the front focus F1, a real image larger than the relic 7 is displayed on the semitransparent screen 3. Is projected.

Further, in the state shown in FIG. 4, the first forward / backward moving mechanism 5
To operate the convex lens 1 by shortening the bellows-shaped expandable portion 4.
Is moved backward and the relic 7 is positioned outside the front spherical center P1, whereby a real image smaller than the relic 7 is projected on the semitransparent screen 3.

Furthermore, in the state shown in FIG. 4, the second advancing / retreating mechanism 6 is operated to raise and lower the convex lens 1 slightly orthogonally to the optical axis C1 thereof, thereby focusing the relic 7 clearly. It can be projected on the semi-transparent screen 3. Further, by raising the convex lens 1 orthogonally to its optical axis C1 and positioning the position of the semitransparent screen 3 inside the spherical center P2, a real image smaller than the relic 7 is projected on the semitransparent screen 3. By operating the two-way moving mechanism 6 to lower the convex lens 1 orthogonally to its optical axis C1 and position the semitransparent screen 3 outside the spherical center P2,
A real image larger than the relic 7 is projected on the semitransparent screen 3.

The above embodiment is divided into a structure in which a semitransparent screen 3 is provided on the rear wall 2A of the light shielding box 2 and a structure in which a semitransparent screen 3 is provided on the ceiling 2B of the light shielding box 2. As shown in Figure 5,
A semi-transparent screen 3 may be provided on each of the rear wall 2A and the ceiling 2B of the light-shielding box 2, and the foldable reflecting mirror 8 may be arranged inside the light-shielding box 2. In addition, a portable structure in which the light-shielding box 2 can be placed on the upper surface of the measurement panel 9 for creating a projection drawing of a desk or the like has been described, but as shown in FIG.
The structure may be fixed to the measuring table 11.

[0022]

As described above, according to the present invention, a large number of measuring and drafting equipments are unnecessary, and a projection drawing of a relic such as an excavated article and the like can be created and measured with high accuracy by extremely simple work. You can

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention according to claim 1.

FIG. 2 is an enlarged vertical side view showing an example of a mounting state of a convex lens.

FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 2;

FIG. 4 is a vertical sectional side view showing an embodiment of the invention according to claim 3;

FIG. 5 is a vertical sectional side view showing another embodiment of the present invention.

FIG. 6 is a vertical sectional side view showing still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Convex lens 2 Light-shielding box 3 Semi-transparent screen 5 1st forward / backward moving mechanism 6 2nd forward / backward moving mechanism 7 Relic 8 Reflector C1 Optical axis of convex lens P1 Spherical center of convex lens P2 Spherical center of convex lens

Claims (5)

[Claims] 1. A convex lens, a light-shielding box having the convex lens mounted on the front surface, and a semitransparent screen which is positioned on a spherical center on the rear side of the convex lens and is attached to the light-shielding box. A device for creating and measuring projections of artifacts such as excavated items. 2. A projection drawing of a relic such as an unearthed article according to claim 1, characterized in that the semitransparent screen is installed facing the rear side of the convex lens and orthogonal to the optical axis.
measuring device. 3. A reflecting mirror for reflecting upward light passing through a convex lens is arranged in the light-shielding box, and the semitransparent screen is arranged orthogonally to a reflection optical axis. An apparatus for creating and measuring a projection of a relic such as an unearthed article according to claim 1. 4. A relic such as an unearthed article according to claim 1, characterized in that a first advancing / retreating mechanism for advancing / retreating the convex lens in parallel with the optical axis thereof is provided. A device for creating and measuring projected views. 5. A projection drawing of a relic such as an unearthed article according to claim 3, further comprising: a second advancing / retreating mechanism for advancing / retreating the convex lens in a direction orthogonal to its optical axis. apparatus.