JP3655937B2 - Sandbox frame - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a sandbox frame for surrounding a sandbox.
[0002]
[Prior art]
In a sandbox provided in an athletic field, a stadium, a park, or the like, the ground and the sandbox portion are partitioned by foundation concrete, and a sandbox frame is provided on the upper surface of the foundation concrete so as to surround the sandbox.
As a conventional sandbox frame, for example, as shown in FIG. 10, a square iron hollow pipe 5 in which anchor bolts 4 are fixed in advance by welding or the like on the upper surface of the foundation concrete 3 that partitions the sandbox 1 and the ground 2 is used. It is fixed via the anchor bolt 4 and, for safety, a substantially synthetic resin material 6 having a substantially U-shape as shown in FIG. 11 is fixed and covered on the surface of the iron hollow pipe 5 with an adhesive. There is a thing of composition.
[0003]
There is also the one shown in FIG. In this structure, an elastic hard rubber frame member 11 as shown in FIG. 13 having a long hole 11A with a predetermined interval is previously aligned with the base concrete 3 at the position of the long hole 11A of the frame member 11. via the anchor bolts 4 which buried Te fixed to foundation concrete 3 top, as shown in FIG. 12, composing the long hole 11A opening above the anchor bolt 4, so as to close a lid member 12 with an adhesive Has been. The contact portion between the frame member 11 and the upper surface of the foundation concrete 3 is fixed with an adhesive. 13 is a nut screwed to the anchor bolt 4, 14 is a washer, and 15 is an iron frame that regulates the tightening amount of the nut 13. The same elements as those in FIG. 10 are denoted by the same reference numerals.
[0004]
[Problems to be solved by the invention]
However, in the conventional sandbox frame shown in FIGS. 10 and 12, when the outer synthetic resin material 6 or the frame member 11 is damaged and needs to be replaced, the synthetic resin material 6 or the hard rubber frame member 11 is used as an adhesive . Therefore, there is a problem that the work of removing these is troublesome and the replacement work takes time. In addition, when metal parts such as the inner anchor bolt 4 or the iron hollow pipe 5 are corroded and need to be replaced, the entire part must be replaced even when the outer part is not damaged and can still be used sufficiently. It is an economy.
[0005]
In the structure shown in FIG. 10, the synthetic resin portion is easily peeled off due to the difference in shrinkage due to heat between the internal metal portion and the external synthetic resin portion, and water easily enters the inside. Further, in the structure of FIG. 12, since there is a long hole 11A on the upper surface of the frame part 11, water easily enters the inside through a gap around the lid member 12. And in these conventional sandbox frames, since an internal metal member is iron, they are easily corroded and have a problem in durability.
[0006]
This invention is made | formed in view of said situation, and it aims at providing the sandbox frame excellent in workability | operativity, durability, etc. at the time of replacement | exchange.
[0007]
[Means for Solving the Problems]
For this reason, the sandbox frame according to the invention described in claim 1 is a sandbox frame provided on the upper surface of the foundation concrete that partitions the ground and the sandbox, the inner frame member fixed to the upper surface of the foundation concrete, and the inner frame member An outer frame member that detachably covers, and the inner frame member is made of metal, is in contact with the upper surface of the foundation concrete, and a bottom surface portion in which anchor bolt through holes are formed at predetermined intervals along the longitudinal direction in the center portion; The outer frame member is elastic and has a substantially U-shaped cross section. have a bent hooks portions inwardly on both lower ends are formed on, the hook portion, the thickness of the vertical direction is thicker structure than a length between the foundation concrete upper surface and the locking portion, On the foundation concrete in the anchor bolt through hole The inner frame member is fastened and fixed to the upper surface of the foundation concrete with a nut through the anchor bolt protruding from the base, the hook portion of the outer frame member is engaged with the engaging portion of the inner frame member, and the outer frame member is engaged with the inner frame member. When the cover is covered , the lower surface of the hook portion is in pressure contact with the upper surface of the foundation concrete .
[0008]
In the invention according to claim 2, the inner frame member is made of aluminum.
In the invention of claim 3, the aluminum inner frame member is anodized.
In the invention described in claim 4, the marker is provided on the upper surface of the outer frame member at a predetermined interval.
[0009]
In the invention according to claim 5, the outer frame member is configured such that the inner surface of the upper surface is formed in an uneven shape.
[0010]
[Action]
According to the configuration of the first aspect of the present invention, the anchor bolt is passed through the anchor bolt through hole of the metal inner frame member and fastened to the nut, and the inner frame member is fixed to the upper surface of the foundation concrete. Then, the hooks at both lower ends of the outer frame member having elasticity are engaged with the engaging portions provided at the outer lower ends of both side wall portions of the inner frame member, and the hook portions are pressed against the upper surface of the foundation concrete. The outer frame member is fixed on the inner frame member.
[0011]
Accordingly, since the outer frame member can be attached to the inner frame member without using an adhesive , it is easy to replace the inner frame member and the outer frame member independently of each other, and the replacement workability and the economy are good. Furthermore, since the hook portion of the outer frame member comes into close contact with the upper surface of the basic concrete and exhibits a sealing function, water can be prevented from entering the inside.
Further, if the inner frame member is made of aluminum as described in claim 2, it is harder to be corroded than in the prior art, and durability is extended. Furthermore, if an anodized (alumite-treated) material is used for the inner frame member as described in claim 3, it becomes more difficult to corrode and the durability is further enhanced.
[0012]
Further, as described in claim 4, if markers are provided on the upper surface of the outer frame member at predetermined intervals, it is convenient for measurement of a long jump or the like in school physical education.
Moreover, if the upper surface inside of an outer frame member is formed in unevenness | corrugation like Claim 5, a cushion effect will increase and safety will improve.
[0013]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows an embodiment of a sandbox frame according to the present invention. In FIG. 1, a sandbox frame 20 of this embodiment is provided on the upper surface of a foundation concrete 21 that partitions the sandbox 1 and the ground 2.
[0014]
The sandbox frame 20 is composed of an outer frame member 30 made of a rubber material having elasticity shown in FIG. 2 and an inner frame member 40 made of metal, for example, aluminum that hardly corrodes.
As shown in FIG. 2, the outer frame member 30 has a substantially U-shaped cross section. And the hook part 31 bent inside is formed in both lower end parts, and the uneven | corrugated | grooved part 32 is formed in the upper surface inner side. The outer frame member 30 includes a straight portion 30A shown in FIGS. 3 and 4 and a corner portion 30B formed at a substantially right angle as shown in FIGS. A marker 33 is provided on the line. In the straight line portion 30A, a plurality of markers 33 are provided at a predetermined interval (for example, 10 cm).
[0015]
As shown in FIG. 7, the inner frame member 40 includes a bottom surface portion 41 that contacts the top surface of the foundation concrete 21 and side wall portions 42 that are erected on both sides of the bottom surface portion 41. A plurality of elongated anchor bolt through holes 43 are formed in the bottom portion 41 at predetermined intervals along the longitudinal direction at the center as shown in FIG. The side wall portion 42 is hollow, and a concave locking portion 44 is formed on the outer lower end portion upward. Similarly to the outer frame member 30, the inner frame member 40 includes a straight portion 40A and a corner portion 40B as shown in FIGS. In addition, the linear part 40A of the inner frame member 40 can be obtained by combining, for example, a plurality of types having different lengths (for example, 0.5 m, 1.5 m, 2 m, etc.). It can be applied to the sandbox 1 having such a size.
[0016]
When installing the sandbox frame 20 of the present embodiment on the upper surface of the foundation concrete 21, first, both the straight portion 40A and the corner portion 40B of the inner frame member 40 are anchor bolts of the inner frame member 40 as shown in FIG. Anchor bolts 22 projecting in advance from foundation concrete 21 are passed through through-holes 43, bottom surface portion 41 of inner frame member 40 is brought into contact with the top surface of foundation concrete 21, and nut 23 is attached to anchor bolt 22 via washer 24. It is fixed on the upper surface of the foundation concrete 21 by screwing and tightening. In addition, what is necessary is just to determine the linear part 40A of the inner frame member 40 combining the kind, the number to be used, etc. suitably according to the magnitude | size of the sandbox 1. FIG.
[0017]
Then, the fixed inner frame member 40 is covered with the straight portion 30A and the corner portion 30B of the outer frame member 30 which are integrally molded according to the size of the sandbox 1, and the locking portions 44 at the lower ends on both sides of the inner frame member 40 are covered. The outer frame member 30 is fixed to the inner frame member 40 by engaging the hook portion 31 of the outer frame member 30, and the inner frame member 40 is covered with the outer frame member 30. The vertical thickness of the hook portion 31 of the outer frame member 30 is greater than the length between the locking portion 44 of the inner frame member 40 and the upper surface of the foundation concrete 21, and the locking portion 44 and the hook portion 31 In the state where the hooks are engaged, the lower surface of the hook portion 31 is pressed against and closely contacts the upper surface of the foundation concrete 21 to exhibit a sealing function and prevent water from entering.
[0018]
According to Sand frame 20 having such a configuration, each of the work of fixing the outer frame member 30 and the inner frame member 40 and the inner frame member 40 and the foundation concrete 21, since no adhesive is used, the outer frame member 30 only and the inner When only the frame member 40 is replaced or when the entire sandbox frame 20 is replaced, the removal work can be easily performed and the work time can be shortened.In addition, the inner frame member 40 is made of aluminum as compared with conventional iron or the like. By doing so, it is lightweight and easy to transport, and the excavation workability of the sandbox frame 20 is extremely superior compared to the conventional one. Further, since the separation of the outer frame member 30 and the inner frame member 40 is simple, even when the outer frame member 30 and the inner frame member 40 are each replaced individually, there is no need to replace the entire sandbox frame 20, which is economical. Also excellent in properties.
[0019]
Further, since the inner frame member 40 is made of aluminum, the corrosion resistance is better than that of a conventional iron, and the durability can be extended. In the case where the inner frame member 40 is made of aluminum, the corrosion resistance can be further increased and the durability can be improved by forming an alumite layer on the surface by anodizing.
Furthermore, since the concavo-convex portion 32 is provided inside the upper surface of the outer frame member 30, the cushioning property is high and the impact absorbing effect is high, so that the safety is excellent. Further, the marker 33 provided on the upper surface of the outer frame member 30 can be used for measurement of a long jump or the like, and is particularly suitable for application to a sandbox such as a school.
[0020]
【The invention's effect】
As described above, according to the first aspect of the invention, when the metal inner frame member is covered with the elastic outer frame member, the hooks of the outer frame member are engaged with the locking portions at the lower ends on both sides of the inner frame member. the parts, since the mounting by engaged as pressed against the concrete foundation top configuration, the adhesive is not required to both fixed, removal work at the time of these exchanges can be very easily and will shorten the work time, conventional The excavation workability of the sandbox frame is extremely superior compared to that. Moreover, since the easy separation of the inner frame member and the outer frame member, that also easily each exchange if the inner frame member and the outer frame member is solely required for replacement occurs and excellent easy economy. Furthermore, since the inside of the sandbox frame can be sealed by the hook portion, water can be prevented from entering the inside of the sandbox frame, and corrosion of the metal inner frame member can be suppressed.
[0021]
Further, if the inner frame member is made of aluminum as in the second aspect of the invention, the corrosion resistance is better than that of the conventional iron, and the durability can be extended. In addition, it is lighter and more transportable than conventional steel.
Further, when the inner frame member 40 is made of aluminum, if the surface is anodized as in the third aspect of the invention, the corrosion resistance can be further improved and the durability is improved. be able to.
[0022]
Further, if the markers are provided on the upper surface of the outer frame member at predetermined intervals as in the invention described in claim 4, it can be used for measuring jumping and the like, and is particularly suitable for application to a sandbox such as a school.
Further, as in the fifth aspect of the present invention, if the concavo-convex portion is provided inside the upper surface of the outer frame member, the cushioning property is high and the impact absorbing effect is high, so the safety can be improved.
[Brief description of the drawings]
FIG. 1 is an attached state diagram showing an embodiment of a sandbox frame according to the present invention.
2 is a cross-sectional perspective view showing the outer frame member of the embodiment. FIG. 3 is a partial top view of the straight portion of the outer frame member. FIG. 4 is a partial bottom view of the straight portion of the outer frame member. FIG. 6 is a bottom view of the corner portion of the outer frame member. FIG. 7 is a cross-sectional perspective view of the inner frame member of the embodiment. FIG. 8 is a partial top view of the straight portion of the inner frame member. 9 is a top view of a corner portion of an inner frame member. FIG. 10 is a mounting state diagram of an example of a conventional sandbox frame. FIG. Fig. 13 is a partial sectional view of the frame member of the sandbox frame shown in Fig. 12;
20 Sandbox
21 Foundation concrete
22 Anchor bolt
23 Nut
30 Outer frame member
31 Hook part
32 Irregularities
33 Markers
40 Inner frame member
41 Bottom
42 Side wall
43 Anchor bolt through hole
44 Locking part

Claims (5)

A sandbox frame provided on the upper surface of the foundation concrete that separates the ground from the sandbox,
An inner frame member fixed to the upper surface of the foundation concrete, and an outer frame member that detachably covers the inner frame member,
The inner frame member is made of metal, has a bottom surface portion in contact with the upper surface of the foundation concrete and has anchor bolt through holes formed at predetermined intervals along the longitudinal direction in the center portion, and an outer lower end provided on both sides of the bottom surface portion. And a side wall portion having a concave locking portion facing upward,
The outer frame member has an elasticity, have a hook portion which is bent inwardly at both lower ends are formed on the substantially U-shaped cross section, the hook portion, the thickness in the vertical direction said locking Is thicker than the length between the portion and the upper surface of the foundation concrete ,
An anchor bolt protruding from the upper surface of the foundation concrete is passed through the anchor bolt through hole, and the inner frame member is fastened and fixed to the upper surface of the foundation concrete with a nut, and the hook portion of the outer frame member is engaged with the locking portion of the inner frame member. A sandbox frame characterized in that when the outer frame member is put on the inner frame member, the lower surface of the hook portion is pressed against the upper surface of the foundation concrete .   The sandbox frame according to claim 1, wherein the inner frame member is made of aluminum.   The sandbox frame according to claim 2, wherein the aluminum inner frame member is anodized.   The sandbox frame according to any one of claims 1 to 3, wherein the outer frame member is provided with markers on the upper surface at predetermined intervals.   The sandbox frame according to any one of claims 1 to 4, wherein the outer frame member has an inner surface formed in an uneven shape.

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