JPH0341492A - Sphere display tool - Google Patents

Abstract

PURPOSE:To smooth the rotation of each semisphere by providing a roller guiding surface on one abutting surface where one of a pair of a semisphere is rotatably supported around an intersecting axis intersecting orthogonally with the pole axis of a terristrial globe as a center and a roller on the other abutting surface. CONSTITUTION:A pair of semispheres 13a and 13b is abutted, a map is displayed on the outer periphery, and the centers of insertion holes 22 in upper and lower parts are the South Pole and the North Pole, respectively. In the case of altering the position of the South Pole, a sphere 13 is rotated around the pole axis 6, and an eccentric axis 21 is housed in the insertion hole 22 of the semisphere 13b, while the semisphere 13a is rotated 180 deg. around a lateral axis 15. Then, the sphere 13 is rotated 180 deg. to house the eccentric axis 21 in the insertion hole 22 of the semisphere 13a, and the semisphere 13b is rotated 180 deg. around the lateral shaft 15. When the semispheres 13a and 13b rotate relatively in this inversing operation of the South Pole, the roller 25 rotates along the roller guiding surface 24; therefore the rotation is executed smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a spherical display device such as a terrestrial globe, a celestial globe, or a planetary globe.

[Conventional technology]

In a globe that displays a map on the outer circumference of the sphere,
Both ends of the polar axis passing through the sphere from north to south are rotatably supported by semicircular or circular support frames supported by a pedestal.

The above-mentioned globe has the disadvantage that the support frame becomes an obstacle to observation, making it particularly difficult to observe near the South Pole.

In order to solve this problem, a hollow sphere supported rotatably around a polar axis is divided into two parts along a plane including the axis of the polar axis, and a pair of hemispheres are formed by the division. A spherical shape in which the positions of the north and south poles can be changed upside down by rotating the hemisphere around the cross axes that are perpendicular to the axes of the polar axes. The present applicant has already proposed a display device (Japanese Unexamined Patent Publication No. 144385/1985 a).

[Problem to be solved by the invention]

By the way, in the spherical display device described in the above publication, when the hemisphere is rotated about the cross axis perpendicular to the polar axis, the hemisphere rotates in contact with the other hemisphere that is stopped from rotating. However, there was a disadvantage that the rotational resistance was relatively large and the hemisphere could not be rotated smoothly.

In addition, since the pair of hemispheres can be stopped from rotating only when rotated 180 degrees around the cross axis perpendicular to the polar axis, the vicinity of the pole located above the sphere can be observed from three sides. However, it is difficult to observe the area near the poles, and many observers cannot see the area at the same time.

The first technical problem of this invention is to improve the spherical display device described in the above publication so that a pair of hemispheres can be smoothly rotated, and it is also possible to easily observe the vicinity of the poles. The second technical challenge is to make this possible.

[Means to solve the problem]

In order to solve the first problem, in the first invention,
A hollow sphere is rotatably mounted around a polar axis supported on a pedestal, and the sphere is divided into two along a plane including the axis of the polar axis to form a pair of hemispheres. The polar shaft is rotatably supported around an intersecting axis perpendicular to the axis of the polar shaft, and eccentric shaft parts are provided at both ends of the polar shaft, and a semicircular part through which the eccentric shaft part is inserted is provided at the abutting part of the pair of hemispheres. A circular insertion hole is formed, and an annular roller guide surface centered around the rotation axis of the hemisphere is formed on one of the abutting portions of the pair of hemispheres, and an annular roller guide surface centered on the rotation axis of the hemispheres is formed on the other abutting portion. We adopted a structure in which a plurality of rollers are rotatably mounted so that their circumferences are in contact with each other.

In order to facilitate the operation of changing the vertical direction of the hemisphere, a click stopper mechanism is installed inside the hemisphere to stop the hemisphere from turning when the hemisphere is rotated 180 degrees. ing.

In addition, 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 are formed at intervals of 906 in the abutting portion of the hemispheres in the first invention. They adopted a configuration that was set up in advance.

In addition, in order to facilitate the operation of changing the orientation of the hemisphere, we adopted a configuration in which a click stopper mechanism was provided inside the hemisphere to stop the hemisphere from turning when it was rotated 90 degrees.

[Effect]

In the first invention, when the hemisphere is rotated about a cross axis perpendicular to the axis of the polar axis, the roller rolls along the roller guide surface. Therefore, rotational resistance during rotation of the hemisphere is extremely small, and the hemisphere can be rotated smoothly.

In the second invention, four insertion holes through which the eccentric shaft portion of the polar axis is inserted are provided at intervals of 90' in a hemisphere that is rotatable about a cross axis perpendicular to the axis of the polar axis. Therefore, the orientation of each hemisphere is 90 degrees centering on the above-mentioned cross axis.
It can be changed by °. Therefore, the locations near the north and south poles, which are difficult to observe with conventional globes, can be repositioned in the lateral direction of the sphere, making it easier to observe the areas near both poles.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

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

As shown in FIGS. 1 and 2, the pedestal 1 includes a support 3 provided on a pedestal 2, and an arc-shaped arm 4 at the upper end of the support 3.
It is said that it is configured with a .

The arm 4 is provided with an insertion hole 5, into which a screw shaft 7 provided at the lower end of a polar shaft 6 is inserted, and the polar shaft 6 is fixed by tightening a nut 8.

When the spherical display device according to the present invention is used as a globe, it is installed with the polar axis 6 inclined at 23 degrees with respect to the vertical line, as shown in FIG.

On the outside of the polar axis 6, as shown in FIG. 4, a rotary support body S is rotatably supported via two bearings 10. A pair of support cylinders 11 are coaxially provided on both sides of the rotary support body 9 and are perpendicular to the axis of the polar axis.

1. A hollow sphere 12 that envelops the polar shaft 6 and the rotating support 9 is divided into two parts along a plane including the axis of the polar shaft 6. A pair of hemispheres 13 formed by the division
A dish-shaped connecting plate 14 is fixed to the inside of each connecting plate 14 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 supported rotatably. ing.

In order to prevent the horizontal shaft 15 from being pulled out from the support cylinder 11, an engagement groove 16 is formed on the outer periphery of the horizontal shaft 15, a pair of split rings 17 are fitted into the engagement groove 16, and one split The tip of a center screw 18 inserted radially from the outer periphery of the support tube 11 is brought into pressure contact with the outer periphery of the ring 17. In addition, a tool insertion hole 1 is provided in each hemisphere 13a, 13b so that the center screw 18 can be rotated from the outside of the hemisphere 13a, 13b.
9 is formed. This tool insertion hole 18 is closed by a removable lid 20.

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

Here, as shown in FIG. 5, the eccentric shaft portion 21 is semicircular and can be accommodated within the insertion hole 22. As shown in FIG. Also,
When the sphere 12 is rotated 90 degrees around the polar axis 6 from the state shown in FIG.
The size is such that it can be inserted across the insertion hole 22 of b.

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

Further, of the pair of hemispheres 13a and 13b, the -power factor sphere 13b has a flange 23 formed inward from the outer peripheral edge, as shown in FIG. It is said that A plurality of rollers 25 whose outer circumferences partially contact this roller guide surface 24 are connected to the other hemisphere 13.
It is rotatably supported on the outer periphery of a.

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.
7 and the outer periphery of the hemisphere 13a support the shaft 25' of the roller 25, and a window 28 is formed in the flange 26 through which the outer periphery of the roller 25 is inserted.

Furthermore, inside the pair of hemispheres 13a and 13b, a third
As shown in the figure, the hemispheres 13a and 13b are on the horizontal axis 15.
When rotating around , the hemispheres 13a and 13b are 1
Click stopper mechanism 30 that temporarily stops every 80° rotation
is provided.

The click stopper mechanism 30 includes a pair of hemispheres 13a, 1
A support piece 31 is formed inside each of the arms 3b, and a roller 33 is attached to one end of the arm 32 whose midway is supported by the support piece 31.
The roller 33 is pressed against the outer periphery of a protrusion 35 provided on the outer periphery of the support tube 11 by the elasticity of a spring 34 connected to the other end of the arm 32, and two notches 36 are formed on the outer periphery of the protrusion 35. The configuration is such that the two are formed at intervals of 180 degrees.

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,
Each hemisphere 13a, with longitude 06 and 180° as the line formed by the butt of the pair of hemispheres 13a and 13b,
A map is displayed on the outer periphery of the sphere 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 in this state, it is difficult to observe the vicinity of the south pole.

Therefore, when observing near the South Pole, the position of the South Pole will be changed. When changing its position, first, the sphere 13 is rotated about the polar axis 6, so that the eccentric shaft part 21 is placed on one side of the hemisphere 13b.
(state shown in Fig. 5)
In this step, the other hemisphere 13a, which has been released from rotation, is rotated 1806 degrees around the horizontal axis 15, so that the positions of the north and south poles are turned upside down.

Next, the sphere 13 is rotated 180 degrees around the polar axis 6, and the eccentric shaft portion 21 is accommodated in the insertion hole 22 of the other hemisphere 13a rotated earlier, and in this state, -power factor sphere 13b
is rotated 180 degrees around the horizontal axis 15.

This completely reverses the positions of the south and north poles, with the south pole at the top, making it easier to observe the south pole.

In the bipolar reversal operation as described above, when the hemispheres 13a and 13b are rotated relative to each other around the horizontal axis 15, the roller 25 rolls along the roller guide surface 24, so that the hemispheres 13a and 13b are rotated. Rotational resistance is small, hemisphere 13a,
13b can be rotated extremely smoothly.

Note that when rotating the hemispheres 13a and 13b, it is difficult to confirm from the outside whether the eccentric shaft portion 21 has been inserted into the insertion hole 22 of one of the hemispheres 13a or 13b. To facilitate confirmation, marks 37 are attached to the pedestal 1 as shown in FIG. 1, and a pair of hemispheres 13a,
The line formed by the mating surface of 13b is marked 3 above.
7, one hemisphere 13a or 13b
The eccentric shaft portion 21 is housed in the insertion hole 22 of the housing.

In the first embodiment, the lower end of the polar shaft 6 was supported by the arm 4, but the upper and lower ends of the polar shaft 6 were supported by a semicircular support frame 4', as shown by the dashed line in FIG. You can.

9 to 13 show a second embodiment of the spherical display device according to the present invention. In this second embodiment, as shown in FIGS. 10 and 12, there are four insertion holes through which the eccentric shaft portion 21 of the polar shaft 6 is inserted into the abutting portions of the hemispheres 13a and 13b. 22 are spaced 90' apart.

Further, as shown in FIG. 12, the polar axis 6 is divided into two parts in the axial direction. It is slidably inserted into an axial hole 40 formed in the 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 split polar shaft 6a is
By pulling up a, it faces the insertion hole 22.

As shown in FIG.
2 is slidably inserted.

A shaft 43 provided on the back surface of the lid 42 is slidably supported inside a guide tube 44 formed on the outer periphery of the rotary support 9 .

An interlocking mechanism 250 is provided between the lid 42 and the upper polar shaft 6a, and when the upper polar shafts 6a, 6b are pulled up, the lid 42 is retracted from the insertion hole 22.

As shown in FIG. 10, the interlocking mechanism 50 includes two discs 51 attached to the upper split polar shaft 6a, and an L-shaped roller 53 provided at one end of the bar 52 built into the discs 51. L
A support piece 54 provided at the middle of the shaping bar 52 on the rotary support body 9
It is supported so that it can swing freely. Further, a long hole 55 is formed at the other end of the L-shaped bar 52, and a pin 56 inserted into the long hole 55 is inserted into an axially long guide hole 57 formed in the guide tube 44.
It is inserted into the shaft 43 of the lid body 42 and fixed to the shaft 43 of the lid body 42. moreover,
One end of a kick spring 58 is connected to the other end of the L-shaped bar 52, and the other end of the kick spring 58 is connected to a spring connection piece 59 provided on the rotation support body 9.

With the above configuration, when the upper split pole shaft 6a is pulled up, the L-shaped bar 52 swings, and the lid body 42 retreats from the insertion hole 22. When the lid body 42 is moved, the upper split pole shaft 6a must be pulled up against the elasticity of the kick spring 58. However, when the upper split pole shaft 6a is pulled up to a predetermined position, the kick spring 58 pulls the L-shaped lever 52. The pressing direction is switched and the elasticity of the kick spring 52 acts in a direction to move the upper split pole shaft 6a upward, so that the upper split pole shaft 6a can be pulled up by the elasticity of the kick spring 58 from mid-movement.

Since the other configurations are the same as those in the first embodiment, the same parts are given the same reference numerals and the explanation will be omitted.

In the second embodiment, when rotating the hemispheres 13a and 13b about the horizontal axis 15, the upper polar axis 6a is pulled up to make the eccentric shaft part 21 face the insertion hole 22, and
The lid body 42 is retreated from the insertion hole 22 and the hemispheres 13a, 1
Release the rotation stopper 3b. The hemispheres 13a, 13b
Since the insertion holes 22 through which the eccentric shaft portions 21 can be inserted are provided at intervals of 90°, the hemispheres 13i13.13b can be rotated 90° about the horizontal axis 15. For this reason, the positions of the north pole and both poles are
2, making it easier to observe the vicinity of both poles.

Moreover, since the insertion hole 22 through which the eccentric shaft portion 21 is not inserted can be closed by the lid 42, it is possible to provide an attractive spherical display device.

In addition, in order to stop the rotation of the hemispheres 13a and 13b every 90 degrees, four notches 36 can be provided on the outer periphery of the protrusion 35 at intervals of 90 degrees, as shown by the dashed line in FIG. be.

14 and 15 show a third embodiment of the spherical display device according to the present invention. In this embodiment, the stability of the sphere 12 is improved by supporting both ends of the polar shaft 6, which is divided into two in the axial direction, by a semicircular support frame 4' attached to the upper part of the support column 3. There is.

Further, a cylinder 60 having two disks 51 is slidably fitted to the outside of the lower polar shaft 6b, and a bin 61 connecting the cylinder 60 and the upper polar shaft 6a is connected to the lower polar shaft 6b. 6
It is slidably inserted into an axially long guide hole 62 formed in b.

Further, in the upper part of the rotating support body S, there is a guide hole 6 that is long in the axial direction.
3, one end of the L-shaped bar 5-52 is inserted into the guide hole 63, and the roller 53 at the tip is assembled between the two discs 51.

The other configurations and operations are the same as those of the second embodiment, so their explanations will be omitted.

〔Effect of the invention〕

Since the present invention is constructed as described above, it has the following effects.

In the spherical display device according to claim 11, a pair of hemispherical bodies rotatably supported around a cross axis perpendicular to the axis of the polar axis is provided with a roller guide surface on one side of the abutting part, and a roller guide surface on the other side. Since the rollers that move along the roller guide surfaces are rotatably provided, the rotational resistance when rotating the pair of hemispheres relative to each other is extremely small, and each hemisphere can be rotated smoothly.

In the spherical display device according to claim (2), the hemisphere can be stopped from rotating at a position where the hemisphere is rotated by 180 degrees by the action of the click stopper mechanism.
It is possible to facilitate the reversal work of reversing the upper and lower parts of the sphere.

6- In the spherical display device according to claim (3), each of the hemispheres has four through holes through which the eccentric shaft portion of the polar axis is inserted.
Since they are spaced apart by 0°, by rotating each hemisphere by 90° about the cross axis perpendicular to the polar axis, the upper and lower parts of the sphere can be arranged laterally. For this reason,
When used as a globe, it is possible to easily observe the vicinity of the North Pole and the South Pole.

In the spherical display device according to claim (4), since the hemisphere can be stopped every 90° rotation by the action of the click stopper mechanism, it is possible to change the position of the sphere by arranging the upper and lower parts of the sphere laterally. can be easily done.

In the spherical display device according to claim (5), the polar axis is divided in the axial direction, the divided polar axes are connected so as to be slidable relative to each other, and the lid body is moved by sliding operation of the divided polar axis. Since the insertion hole through which the eccentric shaft portion is not inserted is closed, it is possible to provide an attractive spherical display device.

[Brief explanation of 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 longitudinal sectional front view of the same, and FIG. 4 is a longitudinal sectional view of the same. 5 is a cross-sectional plan view of the eccentric shaft portion of the same item, FIG. 6 is a sectional view showing an enlarged part of the sphere of the same item, and FIGS. 7 and 8 are a cross-sectional view of the eccentric shaft portion of the same item. 9 is a perspective view showing a second embodiment of the spherical display device according to the present invention, FIG. 10 is a longitudinal sectional view of the same, and FIG. 11 shows the operating state of the same. 12 and 13 are longitudinal sectional side views of the same as above, FIG. 14 is a longitudinal sectional front view of a third embodiment of the spherical display device according to the present invention, and FIG. 15 is a vertical sectional view of the same as the above. FIG. 3 is a cross-sectional view showing a connecting portion of the shaft. 1... Frame, 6... Polar axis, 1
2...Sphere, 13a, 13b...
- Hemisphere, 15...Horizontal axis, 22...
...Insertion hole, 24...Roller guide surface, 25...Roller, 30...Click stopper mechanism, 40...
... Lid body, 50 ... Interlocking mechanism. 9 Japanese Unexamined Patent Publication No. 3 41492 (7)

Claims (5)

[Claims] (1) A hollow sphere is rotatably mounted around a polar axis supported on a mount, 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 The body is rotatably supported around an intersecting axis perpendicular to the axis of the polar axis, eccentric shaft parts are provided at both ends of the polar axis, and the eccentric shaft part is provided at the abutting part of the pair of hemispheres. In a spherical display device having a semi-circular insertion hole through which the abutting portion of the pair of hemispheres is inserted, an annular roller guide surface centered on the axis of rotation of the hemispheres is formed on one of the abutting portions of the pair of hemispheres, and an annular roller guide surface centered on the rotation axis of the hemispheres is formed on the other abutting portion. A spherical display device comprising a plurality of rotatably mounted rollers whose outer peripheries partially contact the roller guide surface. (2) The spherical display device according to claim 1, further comprising a click stopper mechanism provided inside each of the hemispheres to stop the hemispheres from rotating every 180 degrees. (3) Claim (1) wherein four insertion holes through which eccentric shafts are inserted are provided at intervals of 90 degrees in the abutting portions of the hemispheres.
) Spherical display device as described. (4) The spherical display device according to claim 3, further comprising a click stopper mechanism provided inside each of the hemispheres to stop the hemispheres from rotating every 90 degrees. (5) The polar shaft is divided in the axial direction and the pair of divided polar shafts are connected so as to be relatively slidable, and the eccentric shaft portion is not inserted into the open insertion hole inside the pair of hemispheres. A lid body is provided to move forward and backward, and the lid body is moved forward and backward in conjunction with the relative axial movement of the split polar shaft, and the lid body enters into the insertion hole when the split polar shaft moves in the extension direction. The spherical display device according to claim 3 or 4, further comprising an interlocking mechanism for causing the spherical display device to move.