JPS60144458A - Elastic floor structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elastic floor structure, and more particularly, to an elastic floor structure as a coating for a gymnasium facility, which approximates the unique elasticity and exercise comfort of a conventional wooden floor. We are trying to obtain something that can demonstrate the characteristics that we have developed.

In recent years, so-called painted floors using rubber, resin concrete, resin mortar, etc. have been developed as an alternative to wooden floors for floors for physical education facilities.

These painted floors are required to exhibit elasticity and movement comfort similar to those of wooden floors, and for this reason, initially, an elastic layer of rubber chips bonded with urethane was applied to the concrete foundation. urethane, E, V on the surface of this elastic layer.
A floor structure painted with E, etc. was proposed, but this floor structure was too hard compared to wooden floors, so it was not widely adopted. In order to improve this drawback, it has been proposed to create fine voids between the rubber chips by appropriately selecting the mixing ratio of the rubber chips and urethane as the binder for the elastic layer, but this method is still not suitable for wooden floors. At present, it has not yet been possible to demonstrate the same characteristics as that of the previous one, and various improvement studies are being conducted.

The present invention was made in view of the above-mentioned circumstances, and aims to provide an elastic floor structure that has elasticity similar to the properties of conventional wooden floors and provides exercise comfort. In this method, vulcanized rubber particles are bonded using an elastic material as a binder, and an intermediate layer such as a sealing layer is placed on the upper surface of the elastic layer, which has countless fine voids with a porosity of 20 to 40% between the particles. The vulcanized rubber granules of the elastic layer are 0.5 to 5 mm particles. Those within the diameter range and with an average particle size of 4 mm are 0 to 3.
0% by weight, 20-60% by weight for particles with an average particle size of 2.5 mm, and 20-75% by weight for particles with an average particle size of 1 and 5 mm.
The above ratio of vulcanized rubber particles and elastic material are mixed in a multilayer compounding ratio of elastic material IF.
It is characterized in that it is composed of 5 to 10 parts of vulcanized rubber particles to 1 part of vulcanized rubber.

By the way, as a method for evaluating the elasticity of floors for physical education facilities,
Evaluation is carried out using the "elasticity evaluation value (Y)" which will be explained in detail later (for example, in the Collected Papers of the Architectural Institute of Japan Conference (1980) and in the Collected Papers of the Architectural Institute of Japan (2).
27, 1975)] Theoretically, the optimal value of elasticity evaluation value <Y') is said to be Y'=+1.3782.

And for conventional wooden floors, Y = 0 if they are of good quality.
．． 3141, and it has been found that on average Y-→-0,1094. In this respect, it has been confirmed that the conventional coated floor described above is very poor with Y=-0,6694 to -0,6496, and wooden floors are desired.

Here, ``elasticity J is defined as a combination of the hardness of the r floor (buffering effect) and the rebound (repulsion effect) of the floor.'' Then, the weight falls freely, and through the rubber spring,
A load similar to that applied when a human jumps and lands is applied to the floor, and the dynamic deformation behavior of the floor at that time is measured to determine the elasticity evaluation value. That is, the maximum amplitude of floor vibration is [) m
m, Tr sec is the apparent half-period at the maximum amplitude of floor vibration, Tv is the time required for the total amplitude of floor vibration to attenuate to 0.2 mm, d sec is the time required for the floor deformation to reach its maximum. The deformation energy of the floor is U kg 01
1, Y= 0.4036-0.0192 t"
+ 0.07938- o, oole (H-23,2
6) 2-0.028 (S-10,13)2.

In addition, here, H is the amount corresponding to the hardness sensation of the floor, and S is the amount corresponding to the bounce sensation of the floor, which can be calculated by the following formulas.

H-U-1, IXDXD-Tr s-oxo-"rr-' -5- (However, 0≦1-1≦40.0≦S≦38) Also, the value of the deformation energy of the floor is preferably larger. However, if it is too large, the bounce on the floor will become smaller, which may impair the comfort of exercise.

Next, embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

(1) is an elastic layer spread evenly on a concrete foundation (A>), in which vulcanized rubber granules such as rubber chips (10) are combined with an elastic material (11) such as urethane resin as a binder, and the granular □ Innumerable microscopic voids with a porosity of 20 to 40% are formed between each other, and it is preferably spread out to a thickness of about 15 mm. The above vulcanized rubber granules (1
G) has a particle size in the range of 0.5 to 5 mm, with an average particle size of 4 mm being 0 to 30% by weight, and an average particle size of 2.5 mm being 20 to 60% by weight; 1.5
20 to 75% by weight of 20 to 75% by weight of 20 to 75% by weight of 20 to 75% by weight. The mixing ratio of the vulcanized rubber particles (10) in the above ratio and the elastic material (11) in the layer is such that the ratio of 5 to 10 parts of the vulcanized rubber particles to 1 part of the elastic material is -6-.

(2) is a sealing layer formed on the upper surface of the elastic layer (1), and has grain sizes of 0.8 to i, s on the uneven surface of the elastic layer (1).
mm of silica sand was sprinkled on it, and then urethane resin was applied to seal it.

(3) is a leveling layer formed on the top surface of the filler m (2), which is a self-leveling urethane resin of 6,000 to 15,000 cp S spread evenly to form an elastic layer (1).
The top surface has a smooth finish. Then, an intermediate layer (4) is formed by the above-mentioned filler N (2) and leveling layer (3).
will be constructed.

Further, a urethane surface layer (5) which becomes a floor surface is formed on the upper surface of the intermediate layer (4). This urethane surface layer (
As for 5), polyurethane resin and amine mixture are mixed into 1
It is formed by smoothly spreading materials mixed at a ratio of 1:1 and curing at room temperature, and a thickness of about 1 mm is sufficient. The elastic floor (B) with the above structure has a total thickness of 18mm13i! It is formed at the same time.

Incidentally, it is also possible to correct irregularities on the surface of the elastic layer (1) etc. with the filler layer (2) without providing the leveling layer (3).

Furthermore, a contamination prevention layer is formed as necessary on the upper surface of the sealing layer (2) to prevent contaminating components such as anti-aging agents contained in the vulcanized rubber particles of the elastic layer from migrating and diffusing to the surface layer. You can do it like this.

Next, the results of a test to evaluate the elasticity of the elastic bed (B) configured as described above are shown.
1) Rubber chips with a particle size of 3.5 to 4.5 mm (average particle size of 4 mm) are 20% by weight and 20 to 3.0 mm.
(average particle size 2.5 mm) is 45% by weight, 0.5~
2.5 mm (average particle size L 5 mm) is mixed at a ratio of 35% by weight, and the weight mixing ratio of the vulcanized rubber particles (10) and the urethane resin as a binder is 7:1, which improves elasticity. formed a layer. The above-mentioned elasticity evaluation value (Y) of this elastic layer was found to be +0.16, which was a better result than the elasticity evaluation value of an average wooden floor of +0.1094.

In addition, among the vulcanized rubber granules, those with an average particle size of 4μ
30% by weight with an average particle size of 2.5 mm from 20 to -
8 - 60% by weight, with average particle size of 1.5 shells mixed at a ratio of 20 to 75% of the weight. All tests were conducted with the elasticity evaluation value of the average wooden floor + 0.1094 as described above. The value was shown.

As described above, the present invention having the above-mentioned configuration can be used as a coated floor for physical education facilities, etc., and exhibits the same or better elasticity and exercise comfort than conventional wooden floors. It provides an elastic floor structure that is as good as a floor.

[Brief explanation of the drawing]

The figure shows a partial sectional view of the elastic floor structure in this invention. (1)...Elastic layer, (10)...Vulcanized rubber granules,
(11)... Elastic material, (2)... Memekaku, (3
)...Leveling layer, (4)...Middle layer, (5)...
...Urethane surface layer, (A)...Concrete foundation layer,
(8)...Elastic floor. -9-

Claims (1)

[Scope of Claims] 1. Vulcanized rubber particles are bonded using an elastic material as a binder, and a filler is placed on the upper surface of the elastic layer in which countless fine voids with a porosity of 20-40% are formed between the particles. This is an elastic floor structure in which an intermediate layer such as a layer is formed, and a urethane surface layer which becomes a floor surface is formed on the upper surface of this intermediate layer. Within the particle size range, 0-30% by weight has an average particle size of 4 mm, 20-60% by weight has an average particle size of 2.5 mm, and has an average particle size of 1.5
20 to 75% by weight of the vulcanized rubber granules and the elastic material.
An elastic floor structure characterized by a ratio of ~10. -1-2. The elastic floor structure according to claim 1, wherein the intermediate layer is formed of a sealing layer and a leveling layer. 3. The elastic floor structure according to claim 1, wherein the intermediate layer is formed of a sealing layer and a contamination prevention layer.