JPH0648421B2 - globe - Google Patents

Description

TECHNICAL FIELD The present invention relates to a globe.

(Prior Art) In a globe with a relatively large diameter, the sphere is fixed upright to the upper end of the support and can rotate with respect to a cast iron ring body (also called a bow) formed in an annular shape. Is attached to the inside of the ring body.

(Problems to be Solved by the Invention) In the case of the above-mentioned globe, the diameter of the ring body increases corresponding to the size of the sphere, and therefore a problem that a large die casting mold is required to mold the ring body, Since the ring body shrinks and is distorted after molding, there is a problem that it is difficult to mold the ring body having an appropriate and stable shape.

The present invention aims to solve the above problems.

(Means for Solving the Problem) The globe of the present invention has a strip plate shape curved in an arc shape over an equal angle range, and a large number of angle scales are displayed on the front and back sides at the same position on the front and back sides, respectively. 2
One or four arc pieces are formed, and notches are formed at both ends of each arc piece so that one side surface and the opposite side surface of the arc piece have a thickness of 1/2 and equal lengths. In a state where the first connecting portion and the second connecting portion are formed, respectively, and the arc pieces are alternately turned upside down to overlap the first connecting portion and the second connecting portion,
The circular arc pieces are connected endlessly to form a ring body, and the spherical body is supported by a pair of upper and lower fittings inserted through the ring body.

(Operation) Two or four arc pieces each having a strip plate shape curved in an arc shape over the same angle range and having a large number of angle scales displayed on the front and back sides at the same position on the front and back sides, respectively. The first connecting portion and the second connecting portion, which are cut out so that the thickness becomes 1/2 and the length becomes equal on one side surface and the opposite side surface of both ends of the arc piece, respectively.
A ring body for a globe is manufactured by endlessly connecting the above-mentioned arc pieces by alternately superposing the connecting portions and inverting each other.

(Effects of the Invention) Since the present invention is configured as described above, the size of each arc piece is significantly reduced from the size of the ring body by dividing the ring body, and the molding required for forming the arc piece is formed. The size of the mold can be significantly reduced compared to the size of the mold required for molding the ring body, and the manufacturing cost of the ring body can be reduced.

Further, each arc piece can be accurately molded into an appropriate shape to produce a ring body having an appropriate and stable shape, and each arc piece can be connected without any unevenness or step at each connecting portion. Therefore, it is possible to manufacture a ring body having the same outer shape as the ring body having no connecting portion.

(Example) Next, one example of the present invention will be described with reference to the drawings.

A ring-shaped ring body 2 is erected upright on the upper end of a support base 1 of the globe G, and a sphere 3 on which a map of the entire earth is displayed is placed in the ring body 2 via upper and lower mounting brackets 4 and 4. It is rotatably supported with the rotating shaft tilted by 23.5 °.

The ring body 2 is formed by die casting and is curved in an arc shape over a range of 110 °, and four equally shaped arc pieces 5 to 5 made of cast iron are formed by dividing the ring body 2 into four equal parts. It is formed by endlessly connecting the both end portions in a state of being overlapped with each other.

Ribs 17, 17 each having a semicircular cross section are formed in parallel in the longitudinal direction at the inner and outer ends of both side surfaces 5a, 5b of each arc piece 5 along the longitudinal direction. In the vicinity of both ends in the longitudinal direction, the first connecting portion 6 and the second connecting portion 6 are recessed so as to have a thickness of 1/2 over an angle range of 20 ° with respect to one side surface 5a and the opposite side surface 5b. The part 7 and the part 7 are formed symmetrically. Also, each arc piece 5
Between the inner and outer ribs 17 on both side surfaces 5a, 5b, projections 18 to 18 arranged in the longitudinal direction at intervals of 10 [deg.] Are formed in a rectangular trapezoidal shape. However, the width of the protruding portion 18 at the end portion on the first connecting portion 6 side and the width of the protruding portion 18 at the end portion on the second connecting portion 7 side are half the width of the other protruding portions 18.

Both the first connecting portions 6 of the two adjacent arc pieces 5 are fastened to the connecting portions 6 and 7 of the respective arc pieces 5 in an overlapping state, and the second connecting portions of the two adjacent arc pieces 50 are also connected. Two screw holes 8 and 8 for inserting the screws 20 that fasten the parts 7 in an overlapped state are respectively provided, and two arc pieces are provided at the center of the inner surface of the second connecting part 7. The insertion groove 10 having a semicircular cross section is formed so as to form the round hole-shaped through hole 19 through which the shaft portion of the mounting member 4 is inserted when both the second connecting portions 7 of 5 are overlapped and fastened. Each is recessed along the width direction.

On one side surface 5a of each arc piece 5, an angle scale 9 of "0" is displayed on the surface of the protrusion 18 arranged near the outer edge 11 of the first connecting portion 6, and the inside edge from the outer edge 11 is displayed. An angle scale 9 of "0" indicating the equator position, that is, 0 ° is displayed on the surface of the protrusion 18 arranged at a position 10 ° away from the outer edge 11 to 20 °, 30 °, ... Each protrusion 1 80 ° apart
On the surface of 8, "10" indicating the angle from the equator,
The angle scales 9 of "20", ... "70" are displayed, and the scale of "8" is displayed on the surface of the protrusion 18 arranged near the inner end edge 12 of the second connecting portion 7. ing.

On the opposite side surface 5b of each arc piece 5, a scale of "1" is displayed on the surface of the protrusion 18 arranged near the inner end edge 13 of the first connecting portion 6, and the inward direction from the inner end edge 13 is displayed. An angle scale 9 of "20" is displayed on the surface of the protrusion 18 arranged at a position separated by 10 °, which is 20 ° and 3 ° from the inner end edge 13, respectively.
Angles 9 of "30", "40", "50", ... "90" are displayed on the surfaces of the protrusions 18 separated by 0 °, 40 °, ... 80 °, respectively, and the second connection is made. A scale of "0" is displayed on the surface of the protrusion 18 arranged near the outer edge 14 of the portion 7. That is, the same angle scale 9 is displayed at the same position on both side surfaces 5a and 5b of each arc piece 5 so that the angle gradually increases from the first connecting portion 6 side to the second connecting portion 7 side.

In each circular arc piece 5, a portion that is separated from the angle scale 9 of "0" indicating 0 ° inward by about 23.5 °, that is, "2"
Between the "0" and "30" angular scales 9 and about 23.5 degrees inward from the "90" angular scales, ie,
Between the angular scales 9 of "70" and "60", thick-walled portions 15, 15 having an increased wall thickness are formed, respectively.
When the ring body 2 is supported at both ends of an arc body of about 180 °, the thick portion 15 is provided at the upper and lower end portions and the left and right end portions of the ring body to form screw holes in the thick portion 15. Each is arranged.

Then, in a state where the four arc pieces 5 are alternately turned upside down, the first connecting portions 6 of both arc pieces 5 adjacent to each other are overlapped in the thickness direction and fastened, and the two arc pieces 5 adjacent to each other are also fastened. When the second connecting portions 7 are overlapped with each other in the thickness direction and fastened, each arc piece 5 has two pairs of the first connecting portions 6 and two pairs of the second connecting portions 7.
The annular ring body 2 is formed by endlessly connecting via the connecting portion 7.

On one side surface of the ring body 2, the first side surface 5a of the arc piece 5
A scale of "1" displayed on the end of the connecting portion 6 side and a scale of "0" displayed on the end of the arc side 5 adjacent to the arc side 5 on the side of the first connecting portion 6 on the opposite side 5b. And 10 are adjacent to each other, an angle scale 9 of "10" is displayed at the connecting position of both the first connecting portions 6, and "2" near the end portion on the second connecting portion 7 side of the one side surface 5a of the arc piece 5 is displayed. The "8" scale and the "0" scale on the opposite side 5b of the opposite side surface 5b of the arc piece 5 adjacent to the arc piece 5 are adjacent to each other and the connecting position of both the second connection portions 7 is adjacent to each other. Indicates an angle scale 9 of "80".

Then, the ring body 2 is attached to the support base 1 through the thick portion 15 so that the angle scale 9 of "0" is inclined 23.5 ° with respect to the horizontal plane, and the ball body 3 is the attachment fitting inserted into the attachment hole 9. The two "0" angle scales 9 are rotatably attached to the ring body 2 via 4 so that the two "90" angle scales 9 face the north pole and the south pole, respectively. . However, the ring body 2 can
You may divide equally. Further, the ring body 2 may be divided into two equal parts.

Next, the operation and effect of the embodiment having the above-mentioned configuration will be described.

In this example, each has a strip plate shape curved in an arc shape over the same angle range, and a large number of angle scales 9 are formed on the front and back surfaces to form four arc pieces 5 at the same position on the front and back sides. At both ends of each arc piece 5, the thickness is ½ on one side surface and the opposite side surface of the arc piece 5.
To form the first connecting portion 6 and the second connecting portion 7 which are notched so as to have the same length, and the arc pieces 5 are alternately turned upside down to form the first connecting portion 6 and the second connecting portion 6, respectively. With the connecting portion 7 superposed on each other, the circular arc pieces 5 are connected endlessly to form a ring body 2, and the spherical body 3 is supported by a pair of upper and lower fittings 4 inserted through the ring body 2. There is.

For this reason, the size of each arc piece 5 is significantly reduced by dividing the ring body 2 into four,
The size of the forming die required for forming the arc piece 5 is set to the ring body 2
The size can be greatly reduced compared to the size of the molding die required for molding, and the manufacturing cost of the ring body 2 can be reduced.

Further, each arc piece 5 can be accurately formed into an appropriate shape, and the ring body 2 having an appropriate and stable shape can be formed.
Can be manufactured to eliminate variations in the shape and size of the ring body 2, and each arc piece 5 can be connected without any unevenness or step at each connection portion, and similar to a ring body without a connection portion. A ring body having a different surface morphology can be produced.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a plan view of a ring body, FIG. 2 is a front view of a globe, FIG. 3 is a plan view of an arc piece, and FIG. FIG. 5 shows X in FIG.
1-X1 line enlarged sectional view, FIG. 6 is the same X2-X2 line enlarged sectional view, FIG. 7 is X3-X3 line enlarged sectional view of FIG.
8 is an enlarged sectional view taken along line X4-X4, FIG. 9 is an enlarged sectional view taken along line X5-X5, and FIG. 10 is an exploded perspective view of the ring body. 2 …… Ring body 5 …… Arc piece 9 …… Angle scale G …… Globe

Claims (1)

[Claims] Claims: 1. Two or four arc pieces each having a strip plate shape curved in an arc shape over the same angle range and having a large number of angle scales respectively displayed at the same position on the front and back sides. The first connecting portion and the first connecting portion, which are formed at both ends of each arc piece and are cut out so that the thickness is halved on one side surface and the opposite side surface of the arc piece, respectively, are equal to each other. 2 connecting parts are formed respectively,
In a state in which the arc pieces are alternately turned upside down and the first connection portion and the second connection portion are overlapped with each other, the arc pieces are connected endlessly to form a ring body. A globe supported by a pair of upper and lower fittings inserted through the body.