JPH0753640Y2 - Jungle gym - Google Patents

Description

[Detailed description of the device]

[0001]

TECHNICAL FIELD The present invention relates to a jungle gym.

[0002]

2. Description of the Related Art Conventionally, as a jungle gym, for example, as disclosed in Japanese Utility Model Laid-Open No. Sho 63-169158, a large number of paper tubes cut into a predetermined length are formed into a three-dimensional lattice shape through joints. There is something to connect. In addition, there are those in which a large number of iron pipes installed in children's parks or the like are welded in a three-dimensional lattice shape or assembled in a three-dimensional lattice shape through pipe joints.

[0003]

A conventional jungle gym using a paper tube has a problem that it cannot be installed outdoors because of its poor water resistance. Further, although the conventional jungle gym using an iron pipe has water resistance, it has a problem that rust easily occurs when it is wet with moisture in the air such as rainwater. To prevent rusting, the surface of iron pipes and pipe fittings should be painted, but in this case,
It is necessary to repaint once a year or two, which causes a problem that maintenance becomes troublesome.

Therefore, the present inventor has noticed that aluminum alloy is extremely excellent in water resistance and corrosion resistance, and by connecting many pipes made of aluminum alloy with joints made of synthetic resin, water resistance is improved. We devised a jungle gym with excellent corrosion resistance and corrosion resistance. The aluminum alloy can be easily and inexpensively formed into a tubular shape by an extrusion molding method or the like, and the mechanical strength thereof is stronger than that of paper, so that the wall thickness can be made thinner than that of the paper tube.
When the wall thickness of the tubular body is reduced, it may be possible to reduce the outer diameter of the tubular body, but it is not preferable to reduce the outer diameter because the bending strength becomes weak. Therefore, we tried to increase the inner diameter by making the outer diameter of the tube the same as the outer diameter of the paper tube. However, in this case, if a conventional joint for a paper tube is used, a gap is created between the leg of the joint and the tubular body, and the tubular body cannot be firmly connected through the joint. Do you get it. In addition, in order to secure the joint strength between the aluminum tube and the joint, when expanding the outer diameter of the leg of the joint in response to the expansion of the inner diameter of the tube, the joint for the paper tube and the aluminum alloy Not only can not be shared with the joint for the pipe body of
It is necessary to newly raise a mold for the joint having a large outer diameter of the leg portion, which causes a problem that the material cost of the joint is significantly increased.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a jungle gym excellent in water resistance and corrosion resistance and capable of sharing a conventional joint for a paper tube. .

[0006]

In the jungle gym according to the present invention, for example, as shown in FIG. 2, a large number of pipes 2 cut into a predetermined length are connected via joints 3, 4, 5, and 6. In the jungle gym connected in a three-dimensional lattice, in order to achieve the above object, as shown in FIG. 1, the tube body 2 is formed of an aluminum alloy, and the tube body 2 and the joints 3 and 4 are formed.
・ Means for interposing a synthetic resin bush 8 between 5 and 6 are taken.

[0007]

[Function] Since the tubular body 2 is made of an aluminum alloy having excellent water resistance and corrosion resistance, and the joint is also made of a synthetic resin having excellent water resistance and corrosion resistance, a paper tube is conventionally used as the tubular body. Water resistance and corrosion resistance are higher than products, and rust does not occur compared to conventional products that use iron pipes as pipes, so maintenance such as painting is unnecessary and maintenance free.

Further, the tubular body 2 and the joints 3, 4, 5, 6
By interposing a bush 8 made of synthetic resin between and, the gap formed between the pipe body 2 and the joints 3, 4, 5, 6 is filled, and the pipe body 2 has an outer diameter larger than the inner diameter thereof. Can securely connect the legs of the joints 3, 4, 5 and 6 with a small size, and the bush 8 can connect the pipe 2 and the joint 3 to each other.
・ Acts as a cushion against external force that acts on the 4, 5, and 6 legs.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 2, a jungle gym 1 according to an embodiment of the present invention has 124 tube bodies 2.
, 20 3-leg end joints 3, 26 4-leg intermediate joints, 5 5-leg intermediate joints 5 and 4 6
A leg intermediate joint 6 and four step plates 7 are used, and as shown in FIG. 7, a first stage frame 1a placed on the floor or on the ground, a second stage frame 1b, a third stage frame in order. The step frame 1c, the fourth step frame 1d, and the fifth step frame 1e are connected in order and assembled, and the four step plates 7 are supported by the third step frame 1c.

As shown in FIG. 1, each tubular body 2 comprises an aluminum alloy pipe 2a and a synthetic resin layer 2b made of, for example, nylon based on which the surface of the aluminum alloy pipe 2a is covered. The bush 8 thus fitted is internally fitted in a stop-fitting manner. The aluminum alloy pipe 2a is, for example, an aluminum alloy pipe 2 formed by an extrusion molding method.
A is cut into a predetermined length, and the inner peripheral edges of both ends thereof are chamfered in order to facilitate insertion of the bush 8.

Further, the synthetic resin layer 2b may be formed, for example, by cutting the aluminum alloy pipe 2a into a predetermined size by inserting the aluminum alloy pipe 2a into the synthetic resin tube and heating the aluminum alloy pipe 2a to shrink the synthetic resin tube. By closely contacting with the alloy pipe 2a, the aluminum alloy pipe 2a is formed to have a uniform thickness over the entire circumference. The synthetic resin layer 2b may be transparent or opaque and may or may not be colored. In this embodiment, the synthetic resin layer 2b is made of an opaque synthetic resin colored in green. ing.

The bush 8 is not particularly limited, but is made of the same material as the synthetic resin layer 2b and has a brim 8a having an outer diameter substantially the same as the outer diameter of the tubular body 2 formed at one end. It is designed so that it can be fitted onto the legs of 4/5 and 6 (3 in FIG. 1) (3 _x and 3 _{y in} FIG. 1) in a stop-fitting manner. In addition, the small-diameter portion 8b fitted in the tube body 2
A tapered taper surface 8c is formed at the tip of the to facilitate insertion into the tubular body 2.

As shown in FIG. 3, each of the three-leg end joints 3 extends in three directions of x, y, z intersecting at right angles from the shell-shaped connection center 3a and the connection center 3a. Leg 3
_{It has x} · 3 _y · 3 _z . In addition, 4 leg intermediate joint 4
As shown in FIG. 4, is a shell-shaped connection center portion 4a and two legs 4 _{+ y} · that extend in opposite directions from the connection center portion 4a.
4 _-y and two legs 4 _x and 4 _z extending from the connection center portion 4 a in two directions intersecting each other at a right angle on a plane orthogonal to these legs 4 _{+ y} and 4 _-y .

Further, the 5-legged intermediate joint 5, as shown in FIG. 5, the shell-shaped connecting the central portion 5a, in one direction (here, upward direction) from the connection center portion 5a and the leg 5 _y which bring out the , 4 legs 5 _{+ x} · 5 _-x · 5 _{+ z} · which are extended from the connection center 5a in the radial direction at 90 ° intervals on a plane orthogonal to this leg 5 _y.
5 _-z . The six-legged intermediate joint 6 is shown in FIG.
, The shell-shaped connection center portion 6a and the connection center portion 6
Two legs 6 _{+ x} and 6 _-x , which extend in opposite directions from a,
Four legs 6 _{+ y} ·, which are extended in a radial direction at 90 ° intervals on a plane orthogonal to these legs 6 _{+ x} · 6 _-x from the connection center 6a
6- _y * 6 _{+ z} * 6- _z .

These three-leg end joints 3, four-leg intermediate joints 4, five-leg intermediate joints 5 and six-leg intermediate joints 6 have their respective legs 3 _x , 3 _y , 3 _z , 4 _x , 4 _{+ y} , 4 _-y.・ 5
_{+ x}・ 5 _-x・ 5 _y・ 5 _{+ z}・ 5 _-z・ 6 _{+ x}・ 6 _-x・ 6 _{+ y}・ 6 _-y
・ 6 _{+ z}・ 6 _-z (Hereinafter, the joints 3, 4, 5, 6 are used by turning in different directions, the leg symbols are omitted.) Are formed in a cylindrical shape with the same length. ,If necessary,
An enlarged diameter portion 9 is provided in the middle of the outer peripheral surface between the tip end and the base end. The expanded diameter portion 9 may be provided discontinuously in the circumferential direction,
In this embodiment, the legs are formed uniformly and continuously over the entire circumference.

Incidentally, as shown in FIG. 7, the first stage frame 1
The a is assembled in the form of a ninth grid by combining 24 tube bodies 2, four tripod end joints 3, eight four-leg intermediate joints 4 and four five-leg intermediate joints 5. One of the legs of each joint 3, 4, 5 is the second stage frame 1b
Turned up to connect. The second stage frame 1b is R
Assembled into two sets of L, and each set R and L has eight pipes 2 arranged vertically, nine pipes 2 arranged horizontally, two 5-leg intermediate joints 5, It consists of five 4-leg intermediate joints 4 and one 3-leg end joint 3.
One of the legs of each of the joints 4 and 5 except for the three-leg end joint 3 is directed upward to connect the third stage frame 1c.

The third-stage frame 1c includes 14 tubes 2 arranged vertically, 20 tubes 2 arranged horizontally, and 4 tubes 6.
Leg intermediate joints 6, 4 5 leg intermediate joints 5, 4
It consists of four 4-leg intermediate joints 4 and two 3-leg end joints 3, and one of the legs of each joint 4, 5 and 6 excluding the 3-leg end joint 3 connects the fourth stage frame 1d. It is turned upwards to do.

The fourth-stage frame 1d is composed of twelve tubes 2 arranged vertically, twelve tubes 2 arranged horizontally, and four tubes 4.
It consists of a leg intermediate joint 4 and eight three-leg end joints 3, one of the legs of each four-leg intermediate joint 4 being the fifth
It is turned upward to connect the step frame 1e. 5th stage frame 1e
Consists of four pipes 2 arranged vertically, four pipes arranged horizontally and four tripod end joints 3.

In this jungle gym 1, the tubular body 2
Is composed of an aluminum alloy 2a and a synthetic resin layer 2b that covers the outer peripheral surface of the aluminum alloy 2a, so that it will not swell and weaken like a paper tube even if it gets wet with water, and will rust like an iron pipe. There is no fear. Also, the tubular body 2 and the joint 3
・ Since the bush 8 made of synthetic resin is interposed between the legs of 4/5 and 6, the wall thickness of the tube body 2 is formed thinner than the paper tube having the same outer diameter. , The gaps formed between the legs of the joints 3, 4, 5, 6 connecting the paper tubes and the tubular body 2 are filled with the bushes 8 to ensure that the tubular body 2 and the joints 3, 4, 5, 6 are joined. And can be connected. Therefore, joints for paper tubes
5 and 6 can be shared as a joint for the aluminum alloy tube 2, and there is no need to raise a new joint mold, and there is no fear that the material cost of the joint will increase.

Particularly, in this embodiment, the joints 3 and 4 are
.Expansion part 9 in the middle between the tip and the base of the outer peripheral surface of the leg
Since the bush 8 is partially expanded in the outer peripheral direction by the expanded diameter portion 9 and is strongly pressed against the inner peripheral surface of the tubular body 2, the legs of the joints 3, 4, 5, 6 are bushed. 8, the frictional force acting between the tube 2 and the bush 8 increases, and the bush 8 and the legs of the joints 3, 4, 5, 6 become difficult to come off from the tube 2.

Further, the tubular body 2 and the joints 3, 4, 5, 6
Directly joins the end of the tube 2 when joining with
・ Prevents 6 from touching each other, and joints 3 ・ 4 ・ 5 ・
6 can be prevented from being damaged by the tubular body 2, and when an impact force acts on the end portion of the tubular body 2 and the joints 3, 4, 5 and 6, the cushioning force of the bush 8 causes the tubular body 2 to move. Since the impact force acting on the end portion and the joints 3, 4, 5, 6 is buffered, the end portion of the tubular body 2 and the joint 3
・ 4,5,6 durability is improved.

[0022]

As described above, in the jungle gym of the present invention, since the tubular body is made of aluminum alloy, the water resistance and the corrosion resistance can be enhanced. Also, by interposing a bush made of synthetic resin between the tubular body and the joint, the joint used to connect the paper tube in the past can be shared as a joint for connecting the aluminum alloy tubular body, and a new joint There is no need to raise the mold, and the material cost of the joint is not increased.

Further, by interposing a bush made of synthetic resin between the pipe body and the joint, there is no possibility of damaging the joint at the time of joining the pipe body and the joint, and the end portion of the pipe body and the leg portion of the joint. When a shock load is applied to the bush, the bush absorbs the shock,
The durability of the pipe and joint can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment of the present invention.

FIG. 2 is a perspective view of an embodiment of the present invention.

FIG. 3 is a perspective view of a tripod end joint used in an embodiment of the present invention.

FIG. 4 is a perspective view of a four-legged intermediate joint used in an embodiment of the present invention.

FIG. 5 is a perspective view of a 5-leg intermediate joint used in an embodiment of the present invention.

FIG. 6 is a perspective view of a six-legged intermediate joint used in an embodiment of the present invention.

FIG. 7 is an exploded perspective view of an embodiment of the present invention.

[Explanation of symbols]

 1 ... Jungle gym 2 ... Tubular body 3 ... 3-leg end joint 4 ... 4-leg intermediate joint 5 ... 5-leg intermediate joint 6 ... 6-leg intermediate joint 8 ... Bush

Claims (1)

[Scope of utility model registration request] 1. A large number of pipes 2 cut into a predetermined length.
In a jungle gym in which three-dimensional lattices are connected via joints 3, 4, 5, and 6 provided with legs extending in a direction intersecting with each other from a connection center portion, the pipe body 2 is formed of an aluminum alloy, and a pipe is formed. Body 2 and joints 3, 4, 5,
6, which is made of synthetic resin, has a collar 8a having an outer diameter substantially the same as the outer diameter of the tubular body 2 formed at one end, and the inner diameter of the flange 8a.
A jungle gym characterized in that it is set so that it can be externally fitted to the legs of 4, 5 and 6 in a form of a tight fit, and the bush 8 formed on the tapered surface 8c at the other end is interposed.