JPH04204585A - Planetarium with skyline projection device and skyline projection device - Google Patents

Abstract

PURPOSE:To prevent the movement of skyline projected images when the the virtual axis is moved by separating a skyline projection device from a planetarium main body, and providing a rotary device on the skyline projection device, and to concurrently use the skyline projection device and a hemispherical motion picture device by providing lift devices respectively. CONSTITUTION:A skyline projection device 1 can be freely rotated around bearings on a fixed pedestal. The device 1 is driven by a drive motor, and electricity is fed through slip rings. Skyline lift devices 3 are vertically moved by three ball screws 24, the screws 24 are mechanically synchronized by a belt 23, or motors 25 are fitted to the ball screws 24 for electrical synchronization. For the mechanical synchronization between the devices 3 and a planetarium lift device 5, drive devices 29 of the devices 3 are driven by the motor 27 of the device 5 via a drive device 26 and a clutch 28. Drive motors 31 of the devices 3 are disengaged by clutches 30 at this time. For electrical synchronization, synchronous motors are used for the drive motors of the devices 3 and the device 5, and they are controlled by a computer at the same lifting speed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a planetarium having a skyline projection device and a skyline projection device.

[Conventional technology]

The conventional skyline projection device (see Figure 12) is fixed to the mount rotation axis (D) of the planetarium body (F), and always rotates in synchronization with the mount rotation axis (D). .

Furthermore, the movable light-shielding plate built into each of the skyline projection devices (E) could only move in synchronization with the rotation axis of the mount (D) to block light at the dome parting line. . (Refer to Japanese Patent Application Laid-open No. 60-225138.) In addition, the lifting device (H) (see Figs. 13 to 16) is provided below the gantry rotation axis (D), and is connected to the planetarium main body (F) and the skyline projection device (E). ) were always raised and lowered at the same time.

[Problem to be solved by the invention]

The following problems existed with such conventional planetariums.

(1) For example, when reproducing the diurnal motion of Mars as viewed from any point on Mars, suppose that the ground landscape of Mars is projected onto a dome using a skyline projector.

At this time, the planetarium equipment has four axes (diurnal movement axis (
A), the precession axis (B), the latitude change axis (C), and the gantry rotation axis (D)) must be used to perform virtual axis movement. (Refer to JP-A No. 60-133491.) As a result, the skyline projection device (E) fixed to the rotation axis (D) of the mount also rotated, causing the ground landscape of Mars to move, which was unnatural. .

(2) For example, an all-sky all-round movie device (G) located near the center of the dome is used to project an all-sky movie. When also used together, there was a problem that the entire sky movie would be blocked by the planetarium body (F). (See Figures 13 and 14) Also, when switching the projection from the planetarium to the all-sky movie, the transition could not be made smoothly.

[Means for the invention to solve the problem]

(1) The skyline projection device (1) was separated from the planetarium main body (4) and the skyline projection device (1) was provided with a rotation device (2) to prevent the skyline projection image from moving during virtual axis movement. (See Figure 6) (2) By separating the planetarium main body (4) and the skyline projection device (1), and providing each with a lifting device (3) and (5), the skyline projection device (1) and the entire sky can be This makes it possible to use the movie device (6) in combination (see Figure 7).The skyline elevator device (3) has a planetarium body (1) in the center, so it has a donut-like shape.

Therefore, the skyline projection device (1) has a structure that allows it to be raised and lowered by a plurality of legs.

It becomes necessary to synchronize all of these plurality of legs.

The synchronized raising and lowering method uses one motor and mechanically synchronizes it through a heald, chain, shaft, etc.

Each leg uses a motor, etc., and is electrically synchronized.

Furthermore, by controlling the planetarium synchronously with the lifting device (5) of the planetarium main body, it is possible to move up and down as usual.

In this case as well, there is a method of electrically synchronizing and a method of mechanically synchronizing.
There is a way to do it.

〔Example〕

○ Skyline projection device rotation mechanism (see Figure 1) The skyline projection device (1) has a structure that allows it to freely rotate around a bearing (Borlhepring) (16) fixed on a fixed pedestal (15). ing.

Due to its structure, the bearing (16) requires a large diameter bearing, and the following structures are available in addition to the general ball hair ring.

A guide roller (20) with a V-shaped cross section as shown in Figure 2.
The guide rails (21
).

In this case, the weight can be reduced more than in the case of a ball hair ring.

A geared rotary table (17) is provided at the bottom of the skyline projection device and is driven by a drive motor (18).

The motor uses a servo motor and is controlled by a computer.

The skyline projection device is equipped with a swamp ring (19), which supplies electricity to the skyline projection device.

○Skyline lifting device (see Figure 3.4) Skyline lifting device (3) moves up and down using three pole screws (24).

Miki's poles (24) are mechanically synchronized by one motor (22), a chain or a bell (23), etc.

Furthermore, as shown in FIG. 4, it is also possible to attach a motor (25) to each of the Miki ball screws and electrically synchronize them.

Next, the following example will be given as a method for synchronizing the skyline lifting device (3) and the plastic lift J and lifting device (5).

(a) Mechanical synchronization method: (See Figure 5)
The motor (27) of the planetarium lifting device (5) drives the driving device (29) of the skyline lifting device (3) via the driving device (26) and the clutch (28).

At this time, the drive motor (
31) is disconnected by the clutch (30).

The reduction ratio of the drive device of the skyline elevation device and the reduction ratio of the drive device of the planetarium elevation device are set so that the respective elevation speeds are constant.

(b) Method of electrically synchronizing a synchronous motor, a speed control motor, or the like is used as the drive motor for the elevating device of the skyline projection device and the elevating device of the planetarium main body.

In addition, a stamping motor and a servo motor are used and controlled by a computer to maintain the same lifting and lowering speed.

By independently controlling the multiple legs of the skyline lifting device (3), it is possible to impart various movements to the skyline projection device (1).

This allows the projected image to move dynamically, making it possible to create an even more expressive planetarium.

(See Figures 8.9.10) For example, by not moving up, down, left, or right, it is possible to create the feeling of looking at a starry sky on a boat being rocked by the waves.

If the skyline projection device (1) makes such a movement, it becomes impossible for conventional movable light shielding to accurately shield light below the dome parting line.

As a means to solve this problem, the area below the dome parting line can be accurately blocked from light by controlling the light shielding plate in the vertical and rotational directions using independent servo motors or the like using a computer.

The vertical direction of the light shielding plate (10) is moved by a slider (9) on a rack by a drive motor (8).

The direction of rotation of the light shielding plate (10) is moved by a drive motor (11) mounted on the slider (9).

(See FIG. 11) In the figure, (12) and (13) are projection lenses, and (14) is a projector.

(Effects of the Invention) By providing the skyline projection device with a rotating device and a lifting device as described above, dynamic movement of the skyline projected image, which was impossible in conventional planetariums, can be realized.
Various production effects and smooth production flow are possible.

Furthermore, it becomes possible to simulate more realistic cosmic phenomena, which is very effective in terms of education.

[Brief explanation of the drawing]

The accompanying drawings show embodiments of the present invention; FIG. 1 is a partially cutaway side view of the Skyline rotation device, FIG. 2 is a partially cutaway side view of the improved Skyline rotation device, and FIG. 3 is a partially cutaway side view of the Skyline kidney elevation device. FIG. 4 is a perspective view of the Skyline lifting device having multiple motors, FIG. 5 is a side view of the Skyline lifting device that operates in synchronization with the planetarium lifting device, and FIG. 6 is a perspective view of the Skyline projector being operated independently. A side view of the operating state, Figure 7 A, the mouth is an explanatory diagram showing the planetarium main body and the skyline projector have separate lifting devices, Figure 8 A, the mouth, and Figure 9 are all of the planetarium. An explanatory diagram showing the operational relationship between the main body and the Skyline projector, Figure 10 A, C, and C are explanatory diagrams showing the rocking motion of the Skyline projector, and Figure 11 is a partial front view showing the mechanism of the movable light shielding plate. , FIG. 12 to FIG. 16 are explanatory diagrams of conventional plastic material. In addition, the symbol (1) in the figure...Skyline projection device, (2)
・ Skyline rotating device, (3)...Skyline lifting device, (4) Planetarium main body, (5) Planetarium lifting device, (6)...All-sky all-round movie device, (7)・
- Luminous flux of all-sky all-round movie, (8)...1 downward drive motor, (9)...shading plate, (11)...rotation direction drive motor, (15)...fixed pedestal, (16) ... Ball hair ring, (17) ... Rotary table with gears, (18
)・Drive motor, (19)・Swamp ring,
(20)・・Guide roller, (21)・・Guide rail, (22)・・・Drive motor, (23)・・Heald or chain, (24)・・・Ball screw, (25)
・・Drive motor, (2G)・・Drive device, (27)・
・Drive motor, (28)...clutch, (29)...drive device, (30)...clutch, (31)...drive motor

Claims (1)

[Scope of Claims] 1. A planetarium having a skyline projection device, characterized in that the skyline projection device is rotatable around a star projector, and each of the skyline projection devices is raised and lowered by an independent lifting device. 2. A planetarium having a skyline projection device according to claim 1, wherein each lifting device can be raised and lowered synchronously. 3. A planetarium comprising the skyline projection device according to claim 1, wherein each lifting device can be raised and lowered independently. 4. A planetarium having a skyline projection device according to claim 1, wherein the skyline can be projected independently when the star projector is in a lowered position. 5. A skyline projection device having one or several elevating units, each of which can be raised and lowered under synchronous control. 6. A skyline projection device having one or several elevating units, each of which can swing independently. 7. The skyline projection device according to claim 6, wherein the luminous flux of the freely swingable skyline can be automatically blocked by a parting line.