JPH0431085Y2

JPH0431085Y2 -

Info

Publication number: JPH0431085Y2
Application number: JP1989146752U
Authority: JP
Priority date: 1989-12-19
Filing date: 1989-12-19
Publication date: 1992-07-27
Also published as: JPH0385057U

Description

[Brief explanation of drawings]

第１図は本考案の具体的一実施例に係る室内用
ジヤングルジムに使用する３脚端部ジヨイントの
斜視図、第２図はその４脚中間ジヨイントの斜視
図、第３図はその５脚中間ジヨイントの斜視図、
第４図はその６脚中間ジヨイントの斜視図、第５
図は上記室内用ジヤングルジムの斜視図、第６図
はその組立手順例を示す分解斜視図、第７図は従
来例のジヨイントの斜視図、第８図は一先行考案
に係るジヨイントの斜視図、第９図は第２の先行
考案に係るジヨイントの斜視図である。１……ジヤングルジム、２……紙管、３……３
脚端部ジヨイント、３ａ……接続中心部、３ｘ…
…脚、３ｙ……脚、３ｚ……脚、４……４脚中間
ジヨイント、４ａ……接続中心部、４ｘ……脚、
４＋ｙ……脚、４−ｙ……脚、４ｚ……脚、５…
…５脚中間ジヨイント、５ａ……接続中心部、５
ｘ……脚、５＋ｙ……脚、５−ｙ……脚、５＋ｚ
……脚、５−ｚ……脚、６……６脚中間ジヨイン
ト、６ａ……接続中心部、６＋ｘ……脚、６−ｘ
……脚、６＋ｙ……脚、６−ｙ……脚、６＋ｚ…
…脚、６−ｚ……脚、８……拡径部。 Fig. 1 is a perspective view of a three-leg end joint used in an indoor jungle gym according to a specific embodiment of the present invention, Fig. 2 is a perspective view of a four-leg intermediate joint, and Fig. 3 is a five-leg intermediate joint. Perspective view of joint,
Figure 4 is a perspective view of the hexapod intermediate joint, Figure 5
6 is an exploded perspective view showing an example of the assembly procedure, FIG. 7 is a perspective view of a conventional joint, and FIG. 8 is a perspective view of a joint according to an earlier design. FIG. 9 is a perspective view of a joint according to the second prior invention. 1... Young Gym, 2... Paper tube, 3...3
Leg end joint, 3a... connection center, 3x...
...leg, 3y...leg, 3z...leg, 4...4 leg intermediate joint, 4a...connection center, 4x...leg,
4+y...legs, 4-y...legs, 4z...legs, 5...
...5 leg intermediate joint, 5a... Connection center, 5
x...leg, 5+y...leg, 5-y...leg, 5+z
...Leg, 5-z...Leg, 6...Six leg intermediate joint, 6a...Connection center, 6+x...Leg, 6-x
...legs, 6+y...legs, 6-y...legs, 6+z...
... Leg, 6-z... Leg, 8... Expanded diameter part.

Claims

[Scope of Claim for Utility Model Registration] "Field of Industrial Use" The present invention relates to an indoor gym. ``Prior Art'' In general, an indoor giant gym is composed of a number of paper tubes and a number of synthetic resin joints that connect them, as disclosed in, for example, Japanese Utility Model Application Publication No. 169158/1983. There is. For example, as shown in FIG. 7, the joint 120 includes a cylinder 121 having a vertical axis, a leg 122x extending from the middle part of the cylinder 121 in at least one direction (rightward in this case), and a cylinder. The body 121 includes legs 122+z and 122-z extending from an intermediate portion of the body 121 in at least one of the front and rear directions (here, front and rear).
According to this conventional joint, the paper tube of the vertical axis is fitted into the cylinder 121, and the paper tubes of the horizontal axis, that is, the front-rear axis and the left-right axis, have legs 122x, 122+z, respectively.
122-z. "Problem to be solved by the invention" In this conventional example, the legs 122x, 122+
z and 122-z contact a part of the inner circumference of the paper tube on the horizontal axis, so the load concentrates on the contact point, causing the cross-sectional shape of the paper tube to become non-circular and the wall thickness of the paper tube to decrease. The paper tube may be partially reduced at the contact point with the legs 122x, 122+z, 122-z, so that the paper tube
122+z and 122-z, or the paper tube may easily break. Also,
For example, when a paper tube with a vertical axis is not connected to the upper side, such as the joint 120 at the top, the joint 120 needs to be provided with a lid to cover the upper end of the cylinder 121, which reduces the number of parts. As the number of parts increases, the assembly requires more effort and time. Therefore, as shown in FIG. 8, for example, a shell-shaped joint center part 221, a leg 222x extending from the joint center part 221 in at least one of the left and right directions, and a leg 222x extending from the joint center part 221 in at least one of the vertical directions. Each leg 222x, 222+ is provided with extended legs 222+y, 222-y and a leg 222z extending from the joining center portion 221 in at least one of the front and rear directions.
y, 222-y, 222z are formed into a cylindrical shape that fits inside the end of the paper tube, and the outer peripheral surface is formed into a tapered surface whose diameter uniformly increases from the tip to the base. It was devised before it was conceived. The joint according to this prior invention has legs 222x, 222y, 22 on the inner peripheral surface of the paper tube all around
2z, the load is widely distributed and received by each leg 222x, 222y, 222z. Therefore, it is possible to prevent the paper tube from becoming non-circular in cross-sectional shape or partially decreasing in wall thickness due to partial compression.
It is possible to prevent the paper tube from escaping from the joint 220 and from breaking the paper tube. However, it has been found that in this case, there is a problem in that the paper tube tends to slide toward the distal end of the leg 221 due to the elastic contraction force of the paper tube. Therefore, as shown in FIG. 9, for example, each leg 32
An attempt was made to form hook-shaped protrusions 323 on the tapered outer peripheral surfaces of 2x, 322+y, 322-y, and 322z at appropriate intervals in the circumferential direction. According to this second prior invention, when elastic contraction of the paper tube occurs, the inner peripheral surface of the paper tube on the proximal end side of the protrusion 323 contracts to a smaller diameter than the circumscribed circle of the protrusion 323,
It is possible to prevent the paper tube from sliding toward the distal end of the leg 322. However, according to this second prior invention,
Since the projections 323 are not continuous in the circumferential direction, partial deformation of the paper tube occurs, causing the paper tube to become attached to the legs 322x, 32.
It was found that there was a problem in that the inner circumferential surface of the paper tube was easily damaged or broken when removed from the paper tubes 2+y, 322-y, and 322z. The present invention has been made in view of the above circumstances, and aims to provide an indoor joint gym that can reliably prevent escape from the paper tube joint and is less likely to break. It is. ``Means for Solving the Problems'' The present invention comprises a large number of paper tubes cut to a predetermined length and a large number of synthetic resin joints that connect these paper tubes in a three-dimensional lattice shape. a shell-shaped joint center, legs extending from the joint center in at least one of the up and down directions, legs extending from the joint center in at least one of the left and right directions, and at least one of the front and back directions from the joint center. In the indoor gym, the indoor gym has legs extending from the outside, each leg fitting into the end of a paper tube.
In order to achieve the above objectives, we have taken the following measures: That is, after the diameter of each leg is gradually expanded in at least one step between the distal end and the proximal end of the outer circumferential surface from the distal end side toward the proximal end side until the diameter becomes slightly larger than the inner diameter of the paper tube, An enlarged diameter portion that is reduced in diameter from its maximum diameter is formed to protrude uniformly and continuously over the entire circumference, so that the outer surface of the joint center portion is continuous with the outer circumferential surface of the paper tube fitted onto each leg. is formed. "Function" In the present invention, there is at least one stage between the tip and base of the outer circumferential surface of each leg, which gradually expands from the tip side toward the base end until the diameter becomes slightly larger than the inner diameter of the paper tube. After the diameter is expanded, an expanded diameter portion is formed that reduces its diameter from its maximum diameter, so the paper tube fitted to the leg elastically contracts, and the paper tube is expanded closer to the base end of the leg than the expanded diameter portion. Since the inner diameter of the tube is smaller than the maximum diameter of the enlarged diameter portion, it is possible to reliably prevent the paper tube from sliding toward the tip of the leg. In addition, the leg is formed into a cylindrical shape, and the enlarged diameter part formed on the outer circumferential surface is formed around the entire circumference of the leg, so the entire inner circumferential surface of the paper tube comes into contact with the leg, and the load can be applied over a wide range. This prevents the paper tube from being compressed locally, prevents the paper tube from becoming non-circular, and prevents the paper tube from becoming partially thinned, preventing it from escaping from the paper tube joint, and preventing the paper tube from being compressed locally. can prevent breakage. Furthermore, since the connection center is formed into a shell shape without a hole, there is no need for a lid to cover the upper side of the connection center when a vertical paper tube is not arranged above. "Embodiment" A specific embodiment of the present invention will be described below with reference to FIGS. 1 to 6. The indoor gym 1 shown in FIG.
A book paper tube 2, 20 three-leg end joints 3,
26 4-leg intermediate joints 4, 12 5-leg intermediate joints 5, and 4 6-leg intermediate joints 6
and four step plates 7, as shown in FIG.
In the step frame 1a, in order, the second step frame 1b, the third step frame 1c,
The fourth stage frame 1d and the fifth stage frame 1e are assembled. As shown in FIG. 6, a first tier frame 1a placed on the floor, a second tier frame 1b, a third tier frame 1c, a fourth tier frame 1
d and the fifth stage frame 1e are sequentially connected and assembled. As shown in FIG. 1, the three-leg end joint 3 includes a shell-shaped connecting center 3a and legs 3x, 3y extending from the connecting center 3a at right angles to each other in three directions x, y, and z. , 3z. In addition, as shown in FIG. 2, the four-leg intermediate joint 4 has legs 4+y, 4-y extending in opposite directions from the shell-like connection center 4a, and legs +y, 4 extending from the connection center 4a. - Two legs 4 extending in two directions intersecting each other at right angles on a plane orthogonal to y
x, 4z. As shown in FIG. 3, the five-leg intermediate joint 5 has legs 5y extending in one direction (here, upward) from a shell-shaped connection center 5a, and a connection center 5a.
It has four legs 5+x, 5-x, 5+z, and 5-z extending from a in radial directions at 90° intervals on a plane orthogonal to this leg 5y, that is, in four directions, up and down, front and back. Further, as shown in FIG. 6, the six-leg intermediate joint 6 has legs 6+x, 6-x extending in opposite directions from a shell-like connection center 6a, and a connection center 6a.
Four legs 6+ extended in the radial direction at 90° intervals on a plane perpendicular to these legs 6+x and 6−x from
y, 6-y, 6+z, and 6-z. These three leg end joints 3, four leg intermediate joints 4, and five leg intermediate joints 5 and 6
Each leg of leg intermediate joint 6 3x, 3y, 3z, 4+x,
4-x, 4y, 4z, 5x, 5+y, 5-y, 5
+z, 5-z, 6+x, 6-x, 6+y, 6-
y, 6+z, and 6-z (hereinafter, since each joint is used in various directions, the reference numbers for the legs will be omitted) have the same length, and are each fitted internally into the paper tube 2 in a tight fit. It is formed into a cylindrical shape, and has an enlarged diameter portion 8 between the distal end and the proximal end of its outer circumferential surface.
This enlarged diameter portion 8 is formed continuously and uniformly around the entire circumference of each leg, and gradually increases in diameter from the distal end to the proximal end until the diameter becomes slightly larger than the inner diameter of the paper tube. After that, it is sufficient that the diameter is reduced from the maximum diameter. Here, the diameter increases continuously and uniformly up to the maximum diameter, and then decreases in steps from the maximum diameter. It has been formed. As shown in FIG. 6, the lowest frame 1a consists of 24 paper tubes 2, four three-leg end joints 3, eight four-leg intermediate joints 4, and four five-leg intermediate joints 5. For example, 12 paper tubes 2 are connected by four five-legged intermediate joints 5 to form a parallel grid, and three paper tubes 2 are connected at right angles to each other.
Two four-leg intermediate joints 4, in which one of the legs faces upward and the other leg faces inward, are connected to form four sets of outer peripheries, and each outer periphery is arranged in turn in a parallel grid. At the same time as assembly, the outer peripheral ends of each set are connected by a three-leg end joint 3 with one leg facing upward. In addition, the second stage frame 1b consists of 34 paper tubes 2, two three-leg end joints 3, ten four-leg intermediate joints 4, and four five-leg intermediate joints 5,
It is assembled by dividing into a pair of left and right sets L and R. For example, the set L on the left side includes front and rear square lattice frames connected by one paper tube 2 oriented in the front-rear direction. A five-leg intermediate joint 5 is connected to the front and rear of the paper tube 2 that connects the front and rear square lattice frames to each other, and four legs are connected to the left, front, or rear of the five-leg intermediate joint 5 via the paper tube 2, respectively. Intermediate joint 4 is connected. A 4-leg intermediate joint 4 is arranged at a diagonal position of the 5-leg intermediate joint 5 of each previous square lattice frame, and a 3-leg end joint is arranged at a diagonal position of the 5-leg intermediate joint 5 of each previous square lattice frame. 3 is placed and each other pair 4
It is connected to the leg intermediate joint 4 via two paper tubes 2. Paper tubes 2 are connected to the downward legs of each of the three leg end joints 3, the four leg intermediate joints 4, and the five leg intermediate joints 5, respectively. The right set R is assembled in the shape of the left set L rotated horizontally by 180 degrees. The lower end of each vertically oriented paper tube 2 of the second tier frame 1b is connected to the upwardly directed legs of the 3-leg end joint 3, the 4-leg intermediate joint 4, and the 5-leg intermediate joint 5 of the first tier frame 1a. The third stage frame 1c includes 34 paper tubes 2, two 3-leg end joints 3, 4 4-leg intermediate joints 4, 4 5-leg intermediate joints 5, and 4 6-leg end joints 3.
It consists of a leg intermediate joint 6. This third frame 1
In 01c, 12 by four hexapod intermediate joints 6
The paper tubes 2 of the book are connected to form a grid grid, and four sets of outer sides are formed by connecting the two paper tubes 2 in series with a five-legged intermediate joint 5. A four-leg intermediate joint 4 is attached to the front end of a pair of paper tubes 2 extended in front of the parallel grid, and a pair of outer edges are connected to the right end thereof.
At the front end of a pair of paper tubes 2 connected via the five-legged intermediate joint 5 and extended to the rear of the parallel grid,
The other set of outer edges are connected via the four-leg intermediate joint 4 and the five-leg intermediate joint 5 connected to the left end, and connected to the left end of the outer edge of the front group and the left side of the parallel grid. Attach the left ends of the pair of paper tubes 2 taken out, and the outer edges of the other pair to the three-leg end joints 3 and 5.
1 connected to the leg intermediate joint 5 and the 4-leg intermediate joint 4 and extended to the right side of the parallel grid.
Attach the outer edge of the remaining pair to the right end of the pair of paper tubes 2 and the right edge of the outer edge of the rear set, and connect the outer edge of the remaining pair to the four-leg intermediate joint 4.
and are connected via the five-leg intermediate joint 5 and the three-leg end joint 3. A vertical paper tube 2 is connected to each of the downward legs of the three-leg end joint 3, the four-leg intermediate joint 4, the five-leg intermediate joint 5, and the six-leg intermediate joint 6. The lower end of each vertical paper tube 2 of the third tier frame 1c is connected to the upward legs of the four five-legged intermediate joints 5 and ten four-legged intermediate joints 4 of the second tier frame 1b. The fourth stage frame 1d consists of 24 paper tubes 2, 8 3-leg end joints 3, and 4 4-leg intermediate joints. Four sets of U-shaped frames are formed by connecting two paper tubes 2 via leg end joints 3, and these four sets of U-shaped frames are connected by four four-leg intermediate joints 4 to form a hollow. Form a cross-diameter frame. Then, the paper tube 2 is connected to the downward legs of each of the three leg end joints 3 and the four leg intermediate joints 4, and the four leg intermediate joints 4, the five leg intermediate joints 5, and the six leg intermediate joints 6 of the third step frame 1c are connected to the paper tubes 2. 2 vertically oriented paper tubes on the upward legs of the
Connect the bottom ends of. The fifth stage frame 1e consists of eight paper tubes 2 and four three-leg end joints 3, and the four paper tubes 2 are connected by the four three-leg end joints 3 to form a square grid. A frame is formed, and paper tubes 2 are connected to the downward legs of the three leg end joints 3 located at the four corners of this square lattice frame. The lower end of each vertically oriented paper tube 2 of the fifth tier frame 1e is connected to a leg extending upward of the four-leg intermediate joint 4 of the fourth tier frame 1d. The step board 7 may be placed on any horizontal square grid frame, as shown in FIG.
It is placed on the square lattice frames on the front, rear, left and right sides of the third stage frame 1c. In the indoor joint gym 1 formed in this way, the 3-leg end joint 3, the 4-leg intermediate joint 4, the 5-leg intermediate joint 5, and the 6-leg intermediate joint 6 are extended around the entire circumference at the intermediate portion of each leg. Since the diameter portion 8 is provided, when the paper tube 2 fitted onto each leg elastically contracts, the inner diameter of the paper tube 2 changes to the expanded diameter portion 8.
becomes smaller than the maximum diameter of the enlarged diameter portion 8 on the proximal end side,
It is possible to reliably prevent the paper tube 2 from sliding toward the tip side. In addition, since the enlarged diameter portion 8 is formed over the entire circumference of each leg, the inner circumferential surface of the paper tube 2 contacts the leg over the entire circumference, and the load is dispersed over a wide range. It is possible to prevent the paper tube from being compressed locally, and as a result, it is possible to prevent the paper tube from becoming non-circular and partially reducing the wall thickness, and it is possible to more reliably prevent the paper tube from slipping out of the legs. It can prevent the paper tube from breaking. Furthermore, since the connecting center portions 3a, 4a, 5a, and 6a are formed in a shell shape without holes, the connecting center portions 3a, 4
There is no need for a lid that closes the upper sides of a, 5a, and 6a, and the number of parts can be reduced to reduce costs, and the assembly time and effort can be reduced. In addition, in this embodiment, from the first step frame 1a to the third step frame 1c, the front, rear, left, and right sides are provided at the central part of each of the four sides, and on the two inner front and back sides. A 3-leg end joint 3 and a 5-leg intermediate joint are connected at both ends to a pair of upper and lower paper tubes 2 on the four sides of the front, back, left, and right sides from the tier frame to the fifth tier frame. 5 or 6
It is provided with a rectangular lattice frame formed by connecting via a leg intermediate joint 6 and two vertically oriented paper tubes 2 connected by a four-leg intermediate joint 4 or a five-leg intermediate joint 5, respectively. Therefore, a tunnel-like passageway with two upper and lower stages is provided, passing through the central portions of the first to third tier frames 1c from the front to the rear.
The left and right sides of c and the third to fifth frame 1c
There are entrances and exits in two rows, top and bottom, on the four sides facing the central part of e, front, back, left and right, so children can pass through these passages while standing, and children can enter and exit the Young Gym 1 while standing through the passages and entrances. As a result, the form of play can be diversified, and the intellectual and physical education of young children can be more effectively achieved. Further, in the above embodiment, the rectangular lattice frames are provided vertically, but it is also possible to configure the rectangular lattice frames to be provided horizontally. "Effects of the Invention" As described above, the present invention provides at least one stage between the distal end and the proximal end of the outer peripheral surface of each leg of the joint, which gradually becomes larger than the inner diameter of the paper tube from the distal end to the proximal end. The expanded diameter part is expanded to a slightly larger diameter and then reduced from its maximum diameter, so the paper tube fitted to the leg elastically contracts and the expanded diameter part Since the inner diameter of the paper tube is smaller than the maximum diameter of the enlarged diameter portion at the base end of the leg, it is possible to reliably prevent the paper tube from sliding toward the distal end of the leg. In addition, the leg is formed into a cylindrical shape, and the enlarged diameter part formed on the outer circumferential surface is formed around the entire circumference of the leg, so the entire inner circumferential surface of the paper tube comes into contact with the leg, and the load can be applied over a wide range. This prevents the paper tube from being compressed locally, preventing the paper tube from becoming non-circular or reducing the wall thickness in some areas, and preventing the paper tube from escaping from the joint. This can prevent the paper tube from breaking. Furthermore, since the connecting center of each joint is shaped like a shell without a hole, there is no need for a lid to cover the upper side of the connecting center when the vertical paper tube is not connected to the upper side, reducing the number of parts. In addition to reducing costs, assembly time and effort can be reduced.