JP2002346236A - Slide using hyperbolic paraboloid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems that a slide by a movable floor type tilting sliding device which realizes the fun of sliding with a change of a sliding route by giving variation to the surface of a sliding face by changing the waving of a sheet being a sliding surface takes time for the second setting when the first setting is performed because of its complicated operation and that costs or production is also high since the device needs many apparatuses and materials. SOLUTION: The slide utilizing the hyperbolic paraboloid written in claims 12 is obtained by providing a safety slide face of a gentle slope at the front/rear skirt parts 2a and 2b of the slide 1 utilizing a hyperbolic paraboloid, providing stairs 3 to its left side face, forming flat parts 9a and 9b on its left side face, providing flat parts 9a and 9b on the top of both of left and right side surfaces, standing an inverse U-shaped support 4a side by side with the stairs 3 at the left flat part 9b, installing supports 4b in the center of the right flat part 9a respectively in an attachable and detachable manner, binding the top of the right support 4b1 and that of the left support 4a1 via a rope 5, putting the rope 5 through a sliding ring 6 and hanging a rope 7 at the ring 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide using a hyperbolic paraboloid.

[0002]

2. Description of the Related Art Conventional slides have been disclosed in Japanese Unexamined Utility Model Publication No.
As shown in No. 7, a large number of telescopic columns are projected from the base, and the columns are expanded and contracted by using hydraulic, pneumatic, or electric motor driving, and the ends of the columns are brought into contact with the bottom surface of a sheet constituting a passage. It is known that a variety of irregularities can be given to the sliding surface by changing the state of the sheet protruding at that portion.

[0003]

However, in this slide, various changes are made to the surface of the slide surface by changing the raised state of the sheet, which is the surface of the slide surface, so that the slide path is changed. The purpose is to measure the pleasure of change, but due to the complexity of the operation, there are problems such as that once set, it takes time to set the second time, and the device also requires a lot of equipment and production The cost is high, and there is a problem that construction and implementation are extremely difficult.

The present invention has been made in view of the above problems, and a slide using a hyperbolic paraboloid is formed and formed by forming a mathematically accurate mold of a hyperbolic paraboloid. The purpose of this game is to provide children with a playground equipment that enjoys the oddity of sliding by utilizing the property of landing on an unexpected place with a slight difference in direction when sliding down a three-dimensional surface with a saddle point on the back of a horse. And

[0005]

Means for Solving the Problems The present invention has been made to address the above problems, and a slide using a hyperbolic paraboloid according to the first aspect of the present invention is provided in front of and behind a hyperbolic paraboloid. It has a gently sloped safety runway at the bottom and stairs on the left side, and flats on the left and right sides. According to the second aspect of the present invention, an inverted U-shaped support is arranged on the left flat portion in parallel with the stairs, and one support is detachably installed at the center of the right flat portion, and the right support apex and the left support are provided. A rope is connected between the apex and the apex, a loop is slid over the rope, and the rope is hung on the loop.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. FIG. 1 is a perspective view of a slide using a hyperbolic paraboloid according to the present invention, and a slide 1 using this hyperbolic paraboloid can function safely as a slide. As shown in the figure, safety slopes 2a and 2b having gentle slopes are provided at both bottoms of the oblique lines, and sandpits 10a and 10b are provided at the ends thereof.

A stair 3 is provided on the left side surface of the slide 1 and flat portions 9a and 9b are provided on the upper left and right side surfaces, and a support 4a having an annular upper portion is arranged on the left flat portion 9a in parallel with the stairs. One support 4b in the center of the right flat part 9b
Are installed in a detachable manner, and the right column apex 4b1 and the left column apex 4a1 are connected by a rope 5a. It measures safety as a slide.
FIG. 2 is a plan view in which a part of FIG. 1 is omitted, and FIG. 3 is a left side surface of FIG. 4 to 6 are explanatory diagrams showing that the slide according to the present application is based on a mathematical design.

The hyperbolic paraboloid according to the present invention refers to a three-dimensional curved surface as shown by a point S in FIG.
A point that is minimized when cut on the z-plane) and maximized when a plane in another direction (here, the yz-plane) is formed,
It is called the saddle point because it hits the back of the horse's saddle.

Although various types of curved surfaces having saddle points are conceivable, the simplest example is a hyperbolic paraboloid shown in FIG.
This means that if a plane parallel to yz can be formed, all of its cross-sections are parabolic. For example, points A, B, S, B ', and A' shown in FIG. 5 can be parallel to yz. And all its cross sections are parabolic. When a plane (horizontal plane) parallel to xy is formed, any cross section becomes hyperbolic. In particular, when cutting along a horizontal plane passing through the saddle point, two straight lines intersecting each other are formed.

The saddle point is called an “unstable stable point” in dynamics. In the field of potentials and potential energies with saddle points, there are a wide range of engineering applications, and this slide using a hyperbolic paraboloid is used to experience the whole body through play. Indeed, this slide is a mathematically accurate hyperbolic paraboloid mold made and molded as described above.

The original purpose of this slide is to slide down without grasping anything and to experience the movement determined by the shape of the potential with the body. As shown in FIG. 1, the start position is the left flat portion 9 a, and the subsequent course is determined by a slight difference in the initial position. The course is determined only by the initial position, almost irrespective of whether it is held by the rope or not.

FIG. 1 shows an actual sliding state, for example, the case of N is a case of sliding down along a curved line.
When a person slides off the ridgeline and slides down, he descends near the ridgeline, then rises once, stops halfway, and immediately begins to descend backward in a curved line. G goes up as it is when sliding down the ridge line,
Is going to

[0013]

When the slide is installed in a park or a game arcade, a gentle slope is provided at both skirts as shown by diagonal lines in FIG. 1 for safety as a slide. In water playgrounds such as pools, even if you omit providing a gentle sliding surface, even if you slide down a steep slope from the top, you can slide directly into the water, which is quite interesting and you can enjoy sliding safely .

The hatched portions shown in FIGS. 1 and 2 have flat left and right side portions so as to function as a slide safely.
The front and rear hem parts gradually repair the slope of the slope,
A sandbox is provided at the end of the slide to measure the safety function of the slide. Therefore, the repaired part is a part deviating from the hyperbolic paraboloid.

[0015] When sliding down a three-dimensional plane having a saddle point, it is very interesting to land on an unexpected place with a slight difference at the beginning of the slide, and this slide is popular with children. Also, when using on water, a slide using only a hyperbolic paraboloid can slide directly into the water from above, and for children, the front and rear hem parts should be gently repaired with a sloping surface. It is used without.

Since beginners of the lower grades feel terrified at the beginning of slipping, go forward while grabbing the rope hung on the ring, and slip away from the rope at the desired place. You can enjoy. Also, if you get used to it a little, you can walk forward along the ridgeline alone, without the need for a rope hung on a ring, and slide from anywhere you like.

In the manufacture of a slide using a hyperbolic paraboloid according to the present invention, a mold can be made on site and molded by pouring a concrete. And can be installed at a desired location. Since the inside of the slide is hollow, a storage 8 as shown in FIG. 3 is provided to accommodate exercise equipment and the like.

[Brief description of the drawings]

FIG. 1 is a full perspective view of a slide using a hyperbolic paraboloid.

FIG. 2 is a plan view in which a part of FIG. 1 is omitted.

FIG. 3 is an explanatory diagram of the left side surface of FIG. 1;

FIG. 4 shows a hyperbolic paraboloid of a slide using a hyperbolic paraboloid.
It is an explanatory view of what was calculated mathematically.

FIG. 5 is a view showing A ′, B ′, C, B, and A viewed from the front of FIG. 1;
It is explanatory drawing that each cross section of a point is a paraboloid.

FIG. 6 shows A ′, B ′, C, B, and A shown in FIGS. 2 and 5;
It is explanatory drawing which looked at the relationship of A and S point from the side.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Slide using hyperbolic paraboloid 2a Slope with gentle slope 2b Slope with gentle slope 3 Stairs 4a Support 4b Support 4a1 Support apex 4b1 Support apex 5 Support rope 6 Ring 7 Rope 8 Storage entrance 9a Flat Part 9b Flat part 10a Sandbox 10b
Sandbox

Claims (2)

[Claims] 1. A slide (1) utilizing a hyperbolic paraboloid, a front and rear skirt portion (2a) and (2b) of which a slope has a gentle slope and a stairway (3) on its left side. A slide using a hyperbolic paraboloid, wherein flat portions (9a) and (9b) are provided at the upper portions of both left and right side surfaces. 2. An inverted U-shaped support (4) is provided on the left flat portion (9a).
a) is arranged side by side with the stairs (3), one column (4b) is detachably installed at the center of the right flat part (9b), and between the right column apex (4b1) and the left column apex (4a1). 2. A hyperbolic parabolic according to claim 1, wherein the rope is connected with a rope, the rope is slid on the rope, and a rope is hung on the ring. Slide using surface.