JP2735888B2 - Spherical display device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a spherical display device such as a globe, a celestial globe, and a planetary globe.

[Conventional technology]

In a globe in which a map is displayed on the outer periphery of a sphere, usually, both ends of a polar axis passing through the north and south of the sphere are rotatably supported by a semicircular or circular support frame supported by a mount.

In the above globe, the support frame becomes an obstacle to observation,
In particular, there is an inconvenience that observation near the Antarctic is difficult.

In order to solve such inconvenience, a hollow sphere rotatably supported around a polar axis is divided into two along a plane including the axis of the polar axis, and a pair of hemispheres formed by the division are divided. Are rotatably supported around a cross axis orthogonal to the axis of the polar axis, and the position of the north pole and the south pole can be changed upside down by rotation of the hemisphere about the cross axis. The present applicant has already proposed a display device (JP-A-63-144385).

[Problems to be solved by the invention]

By the way, in the spherical display device described in the above publication, when rotating a hemisphere about a cross axis orthogonal to the polar axis, the hemisphere rotates in contact with the other detented hemisphere. , The rotation resistance is relatively large,
There was a disadvantage that the hemisphere could not be rotated smoothly.

In addition, since the pair of hemispheres can be prevented from rotating only at a position rotated by 180 ° about a cross axis orthogonal to the polar axis, it is necessary to observe the vicinity of the pole arranged above the sphere from above And it is difficult to observe near both poles,
There were disadvantages that many observers could not see at once.

The first technical object of the present invention is to improve the spherical display device described in the above publication, to enable a pair of hemispheres to rotate smoothly, and to easily observe the vicinity of both poles. This is a second technical problem.

[Means for solving the problem]

In order to solve the first problem, in the first invention, a hollow sphere is rotatably mounted around a polar axis supported by a gantry, and the sphere is mounted along a plane including the axis of the polar axis. Forming a pair of hemispheres by dividing into two, each hemisphere is supported rotatably about a cross axis orthogonal to the axis of the polar axis, and eccentric shaft portions are provided at both ends of the polar shaft, A semicircular insertion hole through which the eccentric shaft portion is inserted is formed at the abutting portion of the pair of hemispheres, and one of the abutting portions of the pair of hemispheres has an annular roller guide centered on the rotation axis of the hemisphere. A surface is formed, and a plurality of rollers whose part of the outer periphery is in contact with the roller guide surface are rotatably mounted on the other of the abutting portions.

And, in order to facilitate the operation of changing the up and down direction of the hemisphere, a configuration is adopted in which a click stopper mechanism is provided inside the hemisphere to prevent the hemisphere from rotating at a position where the hemisphere is rotated 180 °. ing.

Further, in order to solve the second problem, in the second invention, four semicircular insertion holes through which the eccentric shaft portion of the polar axis is inserted into the butted portion of the hemisphere in the first invention are formed at 90 °. That is, a configuration provided at intervals was adopted.

Also, to facilitate the operation of changing the orientation of the hemisphere,
The click stopper mechanism that stops the hemisphere from rotating while the hemisphere is rotated by 90 degrees is provided inside the hemisphere.

[Action]

In the first invention, when the hemisphere is rotated around a cross axis orthogonal to the axis of the polar axis, the roller rolls along the roller guide surface. For this reason, the rotation resistance during the rotation operation of the hemisphere is extremely small, and the hemisphere can be smoothly rotated.

In the second invention, a configuration in which four insertion holes through which the eccentric shaft portion of the polar axis is inserted is provided at 90 ° intervals in a hemisphere rotatable about a cross axis orthogonal to the axis of the polar axis. Therefore, the direction of each hemisphere can be changed by 90 ° about the above-mentioned cross axis. Therefore, the positions near the north pole and the south pole, which were difficult to observe with the conventional globe, can be changed in the lateral direction of the sphere, and observation near the both poles can be facilitated.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 6 show a spherical display device according to a first embodiment of the present invention.

As shown in FIG. 1 and FIG.
The strut 3 is provided on the top, and an arc-shaped arm 4 is attached to the upper end of the strut 3.

An insertion hole 5 is provided in the arm 4, a screw shaft 7 provided at the lower end of the pole shaft 6 is inserted into the insertion hole 5, and the pole shaft 6 is fixed by tightening a nut 8.

Here, when the spherical display device according to the present invention is used as a globe, the polar axis 6 is attached at an angle of 23 ° with respect to the vertical line as shown in FIG.

As shown in FIG. 4, a rotating support 9 is provided outside the polar axis 6.
Are rotatably supported via two bearings 10. A pair of support cylinders 11 orthogonal to the axis of the polar axis are provided coaxially at both ends of the rotary support 9.

The hollow sphere 12 enclosing the polar shaft 6 and the rotary support 9 is divided into two along a plane including the axis of the polar shaft 6. A pair of hemispheres 13a, 1 formed by the division
A dish-shaped connecting plate 14 is fixed to the inside of 3b by means such as screws, and a horizontal shaft 15 provided at the center of each connecting plate 14 is inserted into the support cylinder 11 and rotatably supported. .

In order to prevent the horizontal shaft 15 from falling out of the support cylinder 11, an engagement groove 16 is formed on the outer periphery of the horizontal shaft 15, and a pair of split rings 17 are fitted into the engagement groove 16, and one of the split rings 17 Set screw screwed into the outer circumference of the support cylinder 11 in the radial direction from the outer circumference
The 18 tips are pressed against each other. Also, each hemispherical body is set so that the set screw 18 can be rotated from outside the hemispherical bodies 13a and 13b.
Tool insertion holes 19 are formed in 13a and 13b. The tool insertion hole 19 is closed by a detachable lid 20.

A semicircular insertion hole 22 through which the eccentric shaft portions 21 formed at both ends of the polar shaft 6 are inserted is formed at the butted portion of the pair of hemispheres 13a and 13b.

Here, the eccentric shaft portion 21 is formed in a semicircular shape and can be stored in the insertion hole 22 as shown in FIG. In addition, the eccentric shaft portion 21 moves the sphere 12 around the polar axis 6 from the state shown in FIG.
When rotated by 90 °, it has such a size that it can be inserted over the insertion hole 22 of the pair of hemispheres 13a and 13b.

The shape of the eccentric shaft portion 21 is not limited to the shape shown in FIG. 5, and may be, for example, a columnar shape as shown in FIG. 7, or as shown in FIG. It may be plate-shaped.

Further, of the pair of hemispheres 13a, 13b, one hemisphere 13b
As shown in FIG. 6, a flange 23 is formed inward from the outer peripheral edge, and the outer surface of the flange 23 is a roller guide surface.
It is 24. A plurality of rollers 25, a part of which is in contact with the roller guide surface 24, are rotatably supported on the outer periphery of the other hemisphere 13a.

In order to support the roller 25, a flange 26 is formed inward from the opening edge of the other hemisphere 13a, and an inner cylinder 27 is provided inward from the inner diameter edge of the flange 26.
The outer periphery of 13a supports the shaft 25 'of the roller 25, and the flange 26 is formed with a window 28 through which the outer periphery of the roller 25 is inserted.

Further, as shown in FIG. 3, when the hemispheres 13a, 13b rotate around the horizontal axis 15, the hemispheres 13a, 13b are rotated by 180 ° inside the pair of hemispheres 13a, 13b. Is provided with a click stopper mechanism 30 for temporarily stopping.

The click stopper mechanism 30 forms a support piece 31 inside each of the pair of hemispheres 13a and 13b, attaches the support piece 31 to one end of an arm 32 halfway supported, and attaches the roller 33 to the arm 32. Is pressed against the outer periphery of a ridge 35 provided on the outer periphery of the support cylinder 11 by the elastic force of a spring 34 connected to the other end of the support tube 11, and two notches 36 are formed on the outer periphery of the ridge 35 at an interval of 180 degrees. There is a configuration.

The spherical display device shown in the embodiment of FIG. 1 has the above structure, and when the spherical display device is used as a globe, the line formed by abutting a pair of hemispheres 13a and 13b is represented by longitudes 0 ° and 180 °. As ゜, a map is displayed on the outer periphery of each hemisphere 13a, 13b, and the center of the upper insertion hole 22 of the sphere 12 is the north pole, and the center of the lower insertion hole 22 is the south pole.

According to the above display, the South Pole is located below the sphere 13, and it is difficult to observe the vicinity of the South Pole as it is.

Therefore, when observing the vicinity of the South Pole, the position of the South Pole is changed. In changing the position, first, the sphere 13 is rotated about the polar axis 6 and the eccentric shaft portion 21 is housed in the insertion hole 22 of the one-sided hemisphere 13b (the state shown in FIG. 5). On the other hand, the detent is released, and the hemisphere 13a is rotated 180 ° about the horizontal axis 15 to reverse the positions of the north pole and the south pole.

Next, the eccentric shaft portion 21 is housed in the insertion hole 22 of the other hemisphere 13a that has been rotated earlier by rotating the sphere 13 by 180 degrees about the polar axis 6, and in this state, the one hemisphere 13b is It rotates 180 ° about the shaft 15.

As a result, the positions of the south pole and the north pole are completely inverted, and the south pole is positioned upward, so that the observation of the south pole is facilitated.

When the hemispheres 13a and 13b are relatively rotated about the horizontal axis 15 in the above-described reversal operation of the two poles, the rollers 25 roll along the roller guide surface 24, so that the hemispheres 13a and 13b
Has a small rotation resistance, and the hemispheres 13a and 13b can be rotated extremely smoothly.

When rotating the hemispheres 13a and 13b, the eccentric shaft 21
However, it is difficult to confirm from the outside whether or not is inserted into the insertion hole 22 of the hemisphere 13a or 13b. In order to facilitate the confirmation, a mark 37 is attached to the base 1 as shown in FIG.
A state in which the eccentric shaft portion 21 is accommodated in the insertion hole 22 of the one hemisphere 13a or 13b by aligning the line formed by the mating surface of the pair of hemispheres 13a and 13b with the mark 37. Have been.

In the first embodiment, the lower end of the pole shaft 6 is supported by the arm 4, but the upper and lower ends of the pole shaft 6 are supported by the semicircular support frame 4 'as shown by the dashed line in FIG. You may.

9 to 13 show a second embodiment of the spherical display device according to the present invention. In the second embodiment,
As shown in FIG. 10 and FIG. 12, four insertion holes 22 through which the eccentric shaft portions 21 of the polar shafts 6 are inserted into the abutting portions of the hemispheres 13a and 13b.
It is provided at 90 ゜ intervals.

As shown in FIG. 12, the polar region 6 is divided into two in the axial direction, and the upper divided polar shaft 6a of the pair of divided polar shafts 6a and 6b is formed.
As shown in FIG. 12, is inserted slidably into an axial hole 40 formed in the lower divided polar shaft 6b, and a knob 41 is provided at the upper end of the upper divided polar shaft 6a.

The eccentric shaft portion 21 of the upper divided polar shaft 6a faces the insertion hole 22 by lifting the divided polar shaft 6a upward.

As shown in FIG. 10, a lid 42 is slidably inserted into two of the four insertion holes 22 through which the polar shaft 6 is not inserted. The shaft 43 provided on the back surface of the lid 42 is slidably supported inside a guide cylinder 44 formed on the outer periphery of the rotary support 9.

An interlocking mechanism 50 is provided between the lid 42 and the upper divided polar shaft 6a, and when the divided polar shafts 6a and 6b are pulled up, the lid 42 is inserted into the insertion hole.
Step back from 22.

The interlocking mechanism 50, as shown in FIG.
And two L-shaped levers 52 mounted on the disk 51.
A roller 53 provided at one end of the rotary support 9 is incorporated, and a halfway of the L-shaped lever 52 is swingably supported by a support piece 54 provided on the rotary support 9. A long hole 55 is formed at the other end of the L-shaped lever 52, and a pin 56 inserted into the long hole 55 is inserted into an axially long guide hole 57 formed in the guide cylinder 44 so that the shaft of the lid 42 is Fixed to 43. Further, a kick spring 58 is attached to the other end of the L-shaped lever 52.
And the other end of the kick spring 58 is connected to a spring connecting piece 59 provided on the rotating support 9.

With the above configuration, when the upper divided polar shaft 6a is pulled up, the L-shaped lever 52 swings, and the lid 42 retreats from the insertion hole 22. When the lid 42 moves, the upper split pole shaft 6a needs to be pulled up against the elasticity of the kick spring 58, but when the upper split pole shaft 6a is pulled up to a predetermined position, the kick spring 58
The direction in which the lever 52 is pressed is switched, and the elasticity of the kick spring 52 acts in the direction of moving the upper split pole shaft 6a upward.
Can be raised by 58 elasticity.

Since other configurations are the same as those of the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

In the second embodiment, the horizontal axis 15 is centered on a hemisphere
When rotating 13a, 13b, the upper polar shaft 6a is pulled up so that the eccentric shaft portion 21 faces the insertion hole 22, and the lid 42 is retracted from the insertion hole 22 to release the rotation of the hemispheres 13a, 13b. . Since the hemispheres 13a and 13b are provided with insertion holes 22 through which the eccentric shaft 21 can be inserted at 90 ° intervals, the hemispheres 13a and 13b are rotated by 90 ° about the horizontal axis 15 described above. Can be done. For this reason, the positions of the North Pole and
It can be positioned in 12 lateral directions, and it is easy to observe the vicinity of both poles.

In addition, the insertion hole 22 through which the eccentric shaft portion 21 is not inserted is
Since it can be closed by 42, a spherical display device with good appearance can be provided.

In addition, in order to stop the rotation of the hemispheres 13a and 13b every 90 °, as shown by a dashed line in FIG.
Four notches 36 are provided at 90 ° intervals.

14 and 15 show a third embodiment of the spherical display device according to the present invention. In this embodiment, both ends of the pole shaft 6 divided into two parts in the axial direction are supported by a semicircular support frame 4 'attached to the upper part of the column 3 so as to improve the stability of the sphere 12. I have.

In addition, the cylindrical body 60 having the two disks 51 is attached to the lower divided polar axis 6b.
Is slidably fitted to the outside, and a pin 61 connecting the cylindrical body 60 and the upper divided polar shaft 6a is slidably inserted into an axially long guide hole 62 formed in the lower divided polar shaft 6b. .

Further, a guide hole which is long in the axial direction is provided in the upper part of the rotary support 9.
One end of the L-shaped lever 52 is inserted into the guide hole 63, and the roller 53 at the tip is assembled between the two disks 51.

The other configuration and operation are the same as those of the second embodiment, and thus the description is omitted.

〔The invention's effect〕

The present invention has the following effects because it is configured as described above.

In the spherical display device described in claim (1), a roller guide surface is provided on one of abutting portions of a pair of hemispheres rotatably supported about a cross axis orthogonal to the axis of the polar axis, and on the other. Since the rollers rolling along the roller guide surface are rotatably provided, the rotational resistance when relatively rotating the pair of hemispheres is extremely small, and each hemisphere can be smoothly rotated.

In the spherical display device according to the second aspect, the hemisphere can be prevented from rotating at the position where the hemisphere is rotated by 180 ° by the action of the click stopper mechanism. Work can be facilitated.

In the spherical display device described in claim (3), four insertion holes through which the eccentric shaft portions of the polar axes pass are inserted into the respective hemispheres.
Since the hemispheres are provided at intervals of 90 °, the upper and lower parts of the spheres can be arranged laterally by rotating each hemisphere by 90 ° about a cross axis orthogonal to the polar axis. Therefore, in the use as a globe, it is possible to easily observe the vicinity of the North Pole and the vicinity of the South Pole.

In the spherical display device according to the fourth aspect, since the hemisphere can be prevented from rotating at every 90 ° rotation by the action of the click stopper mechanism, the operation of changing the position of the sphere in which the upper and lower parts of the sphere are arranged laterally. Can be facilitated.

In the spherical display device described in claim (5), the polar axis is divided in the axial direction, the divided polar axes are relatively slidably connected, and the lid is moved by sliding operation of the divided polar axis. Since the insertion hole through which the eccentric shaft is not inserted is closed, a spherical display device with good appearance can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a spherical display device according to the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a vertical front view of the same, and FIG. 5 is a cross-sectional plan view of the eccentric shaft of the above, FIG. 6 is a cross-sectional view showing an enlarged part of the sphere, and FIGS. 7 and 8 are other eccentric shafts of the above. FIG. 9 is a cross-sectional view showing one example, FIG. 9 is a perspective view showing a second embodiment of the spherical display device according to the present invention, FIG. 10 is a vertical front view of the same, and FIG. Front view, FIGS. 12 and 13 are longitudinal sectional side views of the same, FIG. 14 is a longitudinal sectional front view showing a third embodiment of the spherical display device according to the present invention, and FIG. It is sectional drawing which shows a connection part. 1 ... stand, 6 ... polar axis, 12 ... sphere, 13a, 13b ... hemisphere, 15 ... horizontal axis, 22 ... insertion hole, 24 ... roller guide surface, 25 ... roller, 30 ... ... click stopper mechanism, 40 ... lid, 50 ... interlocking mechanism.

Claims (5)

(57) [Claims] A hollow sphere is rotatably mounted around a polar axis supported by a gantry, and the sphere is divided into two along a plane including the axis of the polar axis to form a pair of hemispheres, Each hemisphere is rotatably supported around a cross axis orthogonal to the axis of the polar axis, and eccentric shaft portions are provided at both ends of the polar axis, and the eccentric portion is provided at abutting portions of the pair of hemispheres. In a spherical display device having a semicircular insertion hole through which a shaft is inserted, an annular roller guide surface centered on the rotation axis of the hemisphere is formed on one of the abutting portions of the pair of hemispheres, and the other of the abutting portions is formed. A plurality of rollers whose outer peripheral portions are in contact with the roller guide surface are rotatably mounted on the roller guide surface. 2. A hemisphere having 18 hemispheres therein.
The spherical display device according to claim 1, further comprising a click stopper mechanism for preventing rotation at every 0 ° rotation. 3. The spherical display device according to claim 1, wherein four insertion holes through which the eccentric shafts are inserted are provided at 90 ° intervals in the abutting portions of the hemispheres. 4. Inside each of said hemispheres, 90 hemispheres are placed.
(4) The spherical display device according to the above (3), further comprising a click stopper mechanism for stopping rotation every rotation. 5. A pair of split pole shafts are slidably connected to each other by dividing the pole shaft in the axial direction, and an open eccentric shaft portion is not inserted inside the pair of hemispheres. A lid is provided so as to be able to advance and retreat with respect to the hole, and the lid is advanced and retracted in conjunction with the relative axial movement of the divided polar axis, and the lid is inserted into the insertion hole when the divided polar axis is moved in the extending direction. The spherical display device according to claim 3 or 4, further comprising an interlocking mechanism for invading the display device.