JPH0637431Y2 - North and south constellation Hayami - Google Patents

Description

[Detailed description of the device] One of the conventional constellation quick views is that the constellation of the celestial sphere is spread out and displayed on a disk at the center of the pole or a shallow dish-shaped curved surface, and a transparent visible window and a time scale are displayed on the disk. When a disk or shallow dish-shaped curved surface is overlapped, and the moon's date scale of the disk below it and the time scale of the disk above it match, the constellation of the observation date will be displayed in the visible window. Comparing the sky with the sky displayed in the visible window, the constellation in the north is reduced to about 1/4 of the whole and the constellation in the south is enlarged to about 3 times sideways, so it is a disadvantage different from the actual shape of the constellation was there.

Another example of conventional constellation Hayami is a teaching tool utility model announcement for constellation memory that approximates the shape of the southern constellation (Showa 34-16047).
There is. In order to observe the constellation of the window in the north, this teaching tool of constellation memory sets the moon's date in the north and the time in the north together, except for special cases, the moon's date in the south and the time in the south are different. In order to observe the constellation of the window in the south, when the moon's day dial in the south and the time dial in the south are combined, the moon moon dial in the north and the time dial in the north become different ways of overlapping.
It was almost never the case that the constellations shown by the north and south windows coincided with the actual sky.

This invention was created to remedy the above-mentioned drawbacks. In this invention, if you adjust the date and time scales common to both north and south, you can display the south and north skies at the same time, and according to the examples described below, you can see the visible range of several points apart from each other. It can be displayed in different windows at the same time and can be compared with each other. Also, when the windows of the south and north were made of transparent plates and contour lines and isotropic lines were drawn on the plates, it was found that the curves of the south and north were similar.

The effect of the embodiment of the present invention is that when only one set of the month and day and the time scale are combined, the south, north, and the sky directly above can be displayed simultaneously on several kinds of windows, and moreover, the number which is separated to the south and north of the whole country. I got a device to display and compare the constellations in the visible range of each point in different windows.

Since the conventional constellation quick reference board is a polar projection, it is distorted except near the poles. In the embodiment of this invention, the cone projection is used to reduce the distortion of the constellations of the zenith and the southern sky. Moreover, there are three types of figures: a figure close to the starry sky in which a person stands upright and looks straight to the north, a figure close to a starry sky in which a person stands upright and looks straight to the south, and a figure close to a starry sky in which a person looks north and looks straight up. It is a feature that is different from conventional ones that they rotate at different angular velocities. Therefore, only one set of the date scale and the time scale is provided, but there is an effect of showing the constellations visible when the two scales coincide with each other on several kinds of visible windows. Since the movement of the constellations with the passage of time is close to the actual feeling, the learning effect is high.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view, FIG. 2 is a cross-sectional view, FIG. 3 is a rear view, and FIG. 4 is a view showing a relationship between a rotary communication device and a disk displaying a constellation and a fixed disk.

In this north-south constellation Hayami, constellations are displayed on discs A and B having different sizes by a predetermined method described later. The disc B having the larger radius is superposed on the lower side of the disc A with the same center, and each disc is rotatable by a rotary connecting device.

Further, the disk A and the disk B are incorporated between a fixed disk C and a fixed disk E having a plurality of visible windows, and are fixed outside the disk B via a spacer P.

In the embodiment of the present invention, the bottom fixed plate E has three visible windows Q.
When the three-dimensional constellation of the present invention is turned upside down, they are visible windows for displaying the constellations near the zenith that can be seen in the three regions of southern, central and northern parts of Japan.

The constellation seen in the visible window Q is drawn on the back surface of the disk B, and the constellation rotates counterclockwise as time passes.
Therefore, the back side of disk B is endless with m sets of constellations from the north pole to near the equator from 0:00 to 24:00 on each of the fan-shaped parts D1, D2, D3 centered on the celestial north pole. It is the structure filled in. In this embodiment, m = 3.

In the fan-shaped parts B1, B2, B3, which are the outer annular part of the surface of the disk B, m sets of constellations in the southern sky are endlessly entered. In this embodiment, m = 3.

On the upper part of the disk B, a disk A in which n constellations centering on the North Pole are drawn is provided concentrically with the disk B. Around the disk A, n sets of month-day scales M are provided. In this embodiment, n = 1.

On the upper side of the disk A, a visible window N, a visible window S and a time scale T
There is provided a fixed plate C having a fixed plate C which is fixed to the lowermost fixed plate E via a spacer P. The visible window S is a visible window for displaying the constellations in the southern sky that can be seen in the three regions of southern, central and northern parts of Japan. The visible window N is a visible window for displaying the northern constellations seen in the three regions of southern, central and northern parts of Japan in an overlapping manner.

In the visible windows N, S, and Q, a line 30 having an altitude of 30 degrees and a line 60 having an altitude of 60 degrees are inserted as dotted lines. Furthermore, in the visible window Q, the zenith is marked with an X mark 8
Indicated as.

The disk A and the disk B provided between the fixed disk C and the fixed disk E are configured to rotate the disk B n times clockwise at a time interval in which the disk A is rotated counterclockwise m times through a rotary communication device. In the embodiment shown in the drawings, n = 1 and m = 3, and the rotation connecting device uses a planetary gear device including a sun gear 1, a planetary gear 2 and an internal gear 3, but the rotation ratio is m: If it is n, another rotary communication device such as a pulse motor may be used.
In the embodiment shown in the drawings, n = 1 <m = 3, and the planetary gear device will be described in detail with reference to FIG.
The figure is a perspective exploded view showing the relationship between the planetary gear unit, which is a rotation connecting device, and the disks A, B, fixed disk E, and fixed disk C.

B'in the figure is a contact surface when the internal gear 3 is fitted into the disk B. The dotted line in the figure means the axis of each gear, and the axis of the gear is omitted in this figure, but it is originally as shown in FIG. Arrows 5 and 4 indicate the rotation directions of the disks. Although the fixed plate E and the fixed plate C are small as compared with FIGS.
This is reduced to show the relationship with the planetary gear unit.

An internal gear 3 having 24 teeth is fitted in the center of the disk B. Further, a sun gear 1 having eight teeth is provided at the center of the disk B, and the shaft of the sun gear 1 is connected to the disk A. Three planetary gears 2 having eight teeth are provided around the sun gear 1, and the three shafts of the planetary gears 2 are fixed to a stationary platen E.

The planetary gear 2 with its shaft fixed does not revolve but only rotates.
On the other hand, the internal gear 3 with 24 teeth is fitted in the center of the disk B
The internal gear 3 can be stably rotated by engaging with the individual planetary gears 2. In other words, the planetary gear 2 also serves as a bearing for the internal gear 3.

Since the planetary gear 2 is an intermediate gear that transmits the rotation of the disk B to the body gear 1 connected to the disk A, the rotation ratio between the disks A and B is 8 /
24 = 1/3.

Next, the method of use will be described with reference to the example of the drawings. With the fixed plates C and E held in one hand, the front surface is brought out, and the disk B is turned in the direction of arrow 4 with the other hand. Since the disk B is connected to the internal gear 3, the internal gear 3
Turns the sun gear 1 in the direction of arrow 5 with the planetary gear 2 as an intermediary. Since the shaft of the sun gear 1 is cold-connected to the disk A, the disk A rotates in the direction of arrow 5. Since the ratio of the rotational angular velocity of the disk A to the rotational angular velocity of the disk B is determined by the number of teeth of the gear, the number of teeth of the sun gear 1, the planetary gear 2 and the internal gear 3 described above causes the disk B to rotate 1/3. Then, the disk A rotates once. That is, when the disk B is rotated by 1/3, the constellation displayed on the disk B is displayed from the right midnight to the right 24 o'clock, and at the same time, the disk A is rotated once and displayed on the disk A. The constellation will be displayed from 0:00 to 24:00.

Referring to FIG. 1, all the scorpions 6 visible in the center of the visible window S in the southern sky move to the right, but the large bear 7 in the visible window N in the northern sky has an angular velocity that is three times faster than that of the clock. Turn around.

The movement of the constellations displayed in the visible window S and the visible window N is almost the same as the actual sky seen at the time of the season above the visible window N when the date and time coincide. However, the constellations seen in the visible window S represent the movements of the respective constellations seen in the center of Japan, north of Japan, and south of Japan, respectively. On the contrary, while looking at the starry sky on a land where the latitude is not known, it is possible to know the time or latitude compared to the Hayami, which is the embodiment of the present invention. For example, the difference in latitude is known by comparing the positional relationship between the line 30 at an altitude of 30 degrees and the scorpion 6 in three types of visible windows S.

Figure 3 is an upside-down view of Figure 1, showing the constellation directly above, but it can be seen at the same time as the time of the month and day in Figure 1. (Third
To know the latitude in the figure, compare the X mark 8 on the zenith with the Hercules 9. The constellations seen in the visible window Q are constellations that can be seen in the mid-latitude, high-latitude, and low-latitude regions, respectively.

To summarize the present invention from the above embodiments, the conventional single window type has a drawback that the southern constellation is distorted.
The north, south and overhead windows had the drawback of showing constellations at different times.

In order to solve this shortcoming, the constellations visible in the south and north were drawn on separate disks or rings by devising a drawing method, and a method of attaching a device that rotates the disks and the disk at a constant rotation ratio was solved.

The effect of this device is that if you set only one set of month and day and time scales, the constellations in the north and south that can be seen at the set date and time can be displayed at the same time in this north-south constellation.

Therefore, when one of the constellations is rotated like the movement of a star with the passage of time, the other constellations also have the effect of rotating accurately.

The effect of this quick view of the North and South constellations is that (1) the constellations in the north and south that can be seen at the same time can be displayed in a natural appearance that is close to the actual feeling. (2) It is possible to accurately know the movement of stars with the passage of time in the south and north. (3) A star map can be displayed in a window that is close to the real feeling that a person looks straight to the south or north in an upright posture. (4) The windows in the south and north are drawn with a contour line that has almost the same shape, making it easy to understand.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view, FIG. 3 is a rear view, and FIG. 4 is a perspective disassembly showing the relationship between a rotary connecting device, a disc and a fixed plate. It is a figure. The symbols used in the figure are as follows: A: disk, B: disk, B ': contact surface, B1, B2, B3: fan-shaped section, C:
Fixed plate, D1, D2, D3: Fan-shaped part, E: Fixed plate, M: Date scale,
N: Visible window, P: Spacer, Q: Visible window, T: Time scale, S:
Visible window, 1: sun gear, 2: planetary gear, 3: internal gear, 4: arrow,
5: Arrow, 6: Scorpio, 7: Okuma, 8: X mark of the zenith, 9: Hercules, 30: line of 30 degrees altitude, 60: line of 60 degrees altitude.

Claims (1)

[Scope of utility model registration request] 1. A sector A1, A2, ... n in which a disk A is divided into n equal parts
Drawing the constellation of the northern sky from 0 o'clock to 24 o'clock, with the radial direction of the fan shape as the direction of the equilateral meridian in each of the disks, and disk B sharing the center with disk A with a radius larger than disk A Is placed under A, and the ring shape of the disk B seen from above is divided into m equal parts B1, B2,
······················································································································· ··············· At least two kinds of visible windows for simultaneously displaying the constellation of the southern sky are provided, and the disks A and B are inserted between the stationary disk C and the stationary disk E, and the stationary disk E and the stationary disk C are provided. Is connected to the outside of the disk B via a spacer, and when the disk A is rotated counterclockwise by m, a mechanism for rotating the disk B clockwise n times is provided. .